Dodge Monaco ES 1990 - 1990 ENGINE PERFORMANCE Self-Diagnostics - 3.0L

Dodge Monaco ES 1990 - INTRODUCTION

If no faults were found while performing BASIC TESTING , proceed with SYSTEM DIAGNOSIS. If no fault codes are present during testing, proceed to H - TESTING W/O CODES article for diagnosis by symptom (i.e. ROUGH IDLE, NO START, etc.).

Dodge Monaco ES 1990 - SYSTEM DIAGNOSIS

The engine control system on Monaco and Premier does not have a check engine light, store fault codes or have self-diagnostic capability. The ECU is programmed to monitor several different engine control system circuits. If a problem is sensed with a monitored circuit during SYSTEM TESTS using DRB-II, the tester will display a fault code. See FAULT CODE IDENTIFICATION table. However, Keep Alive Memory (KAM) faults are displayed for the O2 sensor, MAP sensor, throttle position sensor, air temperature sensor, and coolant temperature sensor. See KAM under DIAGNOSING WITH DRB-II & JEEP/EAGLE ADAPTER in this article.

A specific fault code results from a particular system failure. The component in that system is not necessarily the reason for the failure. The code indicates a possible malfunction area, it does not condemn the component itself.

Dodge Monaco ES 1990 - DIAGNOSING WITH DRB-II & ADAPTER

Diagnostic connectors "D1" and "D2" are located on right front fender panel. See Fig. 1 . With DRB-II and Jeep/Eagle adapter connected to diagnostic connectors "D1" and "D2," all character positions will illuminate and copyright information will appear on screen for a few seconds. If DRB-II screen is blank, refer to DRB-II PROBLEMS & ERROR MESSAGES in this article. The DRB-II will offer 4 menus: Dodge Monaco ES 1990 - Component Locations - VEHICLES TESTED, HOW TO USE, CONFIGURE and SELECT VEHICLE.

Fig. 1: Dodge Monaco ES 1990 - Component Locations - Location of Diagnostic Connectors "D1" & "D2"

Dodge Monaco ES 1990 - VEHICLES TESTED

Press "1" key or ENTER key when VEHICLES TESTED appears on DRB-II. DRB-II shows models covered by cartridge. Screen will display for 5 seconds and return to DRB-II menu. To return to DRB-II menu sooner, press ATM key.

Dodge Monaco ES 1990 - CONFIGURE

Press "3" key or ENTER key when CONFIGURE appears on DRB-II. Configure allows user to customize DRB-II display. For example, if metric system is more useful, select METRIC from the menu. All selections in CONFIGURE option remain active until user changes selection.

Dodge Monaco ES 1990 - SELECT VEHICLE

1. This allows the user to enter information about vehicle being tested. Usually, this option has more than one display screen. Use ENTER key to enter vehicle information. When entering TRANS TYPE, enter AUTO ZF TRANS.
2. When all information about vehicle is entered, DRB-II will display an information summary the technician has entered. DRB-II will show an additional option marked CONFIRM. If information is correct, press CONFIRM. DRB-II will display MAIN MENU.

Dodge Monaco ES 1990 - MAIN MENU

The MAIN MENU presents all diagnostic functions available. Functions are SYSTEM TESTS, READ FAULTS, STATE DISPLAYS, ACTUATOR TESTS and ADJUSTMENTS. READ FAULTS and ACTUATOR TESTS are NOT available.

CAUTION:

Keep Alive Memory (KAM) will be ERASED if SYSTEM TESTS are performed before checking KAM faults.

Dodge Monaco ES 1990 - SYSTEM TESTS

1. This is an interactive functional test of a particular system. During testing, DRB-II provides instructions to technician. After task is performed, press ENTER key. A fault will be generated since technician has performed a requested action and tester had not seen any indication from diagnostic pins.
2. Some tests, such as engine coolant temperature sensor, require longer periods before circuit is automatically faulted (depending on ambient temperature). If after performing SYSTEM TESTS, DRB-II is unable to detect a fault, NO FAULTS DETECTED will display.
3. An alpha character may appear as a fault code prefix. The character displayed can indicate where fault was detected in the engine test sequence. Alpha prefixes display only during SYSTEM TESTS.
   • "A" (First Key Off) - Ignition switch in OFF position.
   • "B" (Key On Before Fuel Pump Drops Out) - Ignition in ON position. FUEL PUMP DROPS OUT refers ECU activating fuel pump relay and fuel pump. If the ECU does NOT detect a crank signal within seconds after ignition is turned on, it will automatically open ground circuit to fuel pump relay, disabling fuel pump.
   • "C" (Key On After Fuel Pump Drops Out) - Ignition is in ON position after fuel pump relay has timed out (fuel pump off).
   • "D" (First Crank) - The engine is cranking but not running.
   • "E" (First Engine Start) - Engine idling.
   • "F" (Second Key Off Before Fuel Pump Drops Out) - Ignition is in OFF position for the second time before fuel pump relay has timed out.
   • "G" (Second Key Off After Fuel Pump Drops Out) - Ignition in OFF position for second time before fuel pump relay times out.
   • "H" - Second Key On.
   • "I" - Second Engine Start.
   • "J" - Last Key Off.
   • "X" (ECU Defined Faults) - Faults detected by ECU on-board diagnostics.

Dodge Monaco ES 1990 - STATE DISPLAYS

1. This allows technician to view conditions at signal level. The 2 types of signals are analog and digital. Analog signals are monitored at pins corresponding to vehicle harness splices (e.g. fuel pump relay). Digital signals correspond to data transmitted by system controllers. Both signals are displayed in common units (e.g. temperature), this information is not relative to diagnostic intent.
2. Use up and down arrow keys on DRB-II to scroll through displays. Select STATE DISPLAYS or ENGINE. If ENGINE state display is selected, technician has the option to view either static state display or MIN/CURRENT/MAX value display.
3. The STATIC display shows current conditions as they exist. The MIN/CURRENT/MAX display shows a history of specific sensor conditions. Maximum, current (static) and minimum values can be displayed for a specific sensor. To reset sensors or zero value, simply press ENTER key. This display can isolate intermittent faults.
4. The following ENGINE state displays are available on the DRB-II.
   • Vehicle Program and Calibration Code - Program numbers (PGM) indicate ECU is programmed for a specific engine. Calibration code (CAL) applies to manual or automatic transmission.
   • Battery - Displays battery voltage.
   • H 2 O - Engine coolant temperature is displayed in degrees Fahrenheit or Celsius.
   • Air - Air temperature is displayed in degrees Fahrenheit and Celsius.
   • TPS - Throttle Position Sensor (TPS) is displayed as WIDE OPEN, CLOSED or PARTIAL and percentage of opening from closed throttle to Wide Open Throttle (WOT).
   • A/C Status - If any A/C signals are active, an abbreviated display will show: Select SEL, Predict PRE, Clutch CL and Cut-Out CO. If A/C signals are inactive, A/C OFF will be displayed.
   • Relay Status - Displays EGR solenoid, B+ latch relay and fuel pump relay as on "+" or off "0". When EGR solenoid is off, vacuum is present. When EGR solenoid is on, vacuum is absent.
   • Barometric Pressure Reading - Barometric pressure value can be used to test MAP sensor. A good MAP sensor will read within .60 in. Hg of current barometric pressure at sea level. Subtract .1 in. Hg for every 100 feet above sea level. Call weather bureau for current barometric pressure.
   • RPM - Engine speed is displayed.
   • Exhaust Oxygen Sensor - Displays voltage from O2 sensor and whether fuel system is "RICH" or "LEAN". Displays if system is in "DECEL" condition or "OPEN LOOP".
   • Pulse Width - Displays the amount of time in milliseconds that the fuel injector is open.
   • ALFACL - The closed loop pulse width correction factor is displayed in units from 0-255. ALFACL represents the correction used to calculate injector pulse width in response to oxygen sensor input. If oxygen sensor reads rich, ALFACL will decrease. If oxygen sensor reads lean, ALFACL will increase.
   • CTAVE - This is average closed throttle value displayed as a percentage of full scale. The closed throttle switch provides a signal to the ECU to indicate throttle status.
   • KAM - Keep Alive Memory (KAM) faults are displayed for the O2 sensor, MAP sensor, TPS, air temperature sensor and coolant temperature sensor. Next to sensor display, a pair of numbers is displayed. Each number reflects a period since ECU detected a fault. The first number corresponds to a sensed Low condition failure. The second number corresponds to a sensed High condition failure. When ECU detects a Low or High condition failure, then number 15 will be stored for the respective sensor. If the engine is started and closed loop is attempted and fault is no longer present, the counter will be decreased by one. If the fault is still present, counter will remain at 15. Values of "0" (zero) indicate a Low or High fault condition does not exist for sensor displayed. Values of 0-15 indicate the ECU has detected a fault at some time, but fault is not currently present (possible intermittent).
5. The MIN/CURRENT/MAX display allows technician to observe operation of 6 different sensor values. Information is displayed as a 3-digit number. The first value is minimum reading, second number is current reading and third value is maximum reading. The monitored sensors are: MAP sensor, O2 sensor, Throttle Position Sensor (TPS), Coolant Temperature Sensor (CTS), Manifold Air Temperature (MAT) sensor and CTAVG (average learned closed throttle value).
6. Typically sensors range between 2-252. Values less than 2 or greater than 252 will usually indicate a sensor is shorted or disconnected. Watch minimum and maximum values to help diagnose intermittent problems.
7. The CUSTOM DISPLAY allows the user to program up to 2 screens, which can consist of STATE DISPLAYS MIN/CURRENT/MAX or SENSORS.

Dodge Monaco ES 1990 - ADJUSTMENTS

The "Adjustments" option provides TPS adjustment or erasing stored information in system controller. Follow DRB-II instructions to accomplish desired task.

Dodge Monaco ES 1990 - DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION

Dodge Monaco ES 1990 DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION

Fault Code	Fault Condition
1000	Ignition Line Low
1001	Ignition Line High
1002	Checking Vehicle Configuration
1004	Battery Voltage Low
1005	Sensor Ground Line Out Of Limits
1010	Diagnostic Enable Line Low
1011	Diagnostic Enable Line High
1012	Ignition Control Module Line Low
1013	Ignition Control Module Line High
1014	Fuel Pump Line Low
1015	Fuel Pump Line High
1016	Manifold Air Temperature (MAT) Sensor Line Low
1017	Manifold Air Temperature (MAT) Sensor Line High
1021	No Start Due To Mechanical, Fuel Or Ignition Problem
1022	Start Line Low
1024	ECU Does Not See Start Signal
1027	ECU Sees Wide Open Throttle (WOT)
1028	ECU Does Not See Wide Open Throttle (WOT)
1031	ECU Sees Closed Throttle
1032	ECU Does Not See Closed Throttle
1033	Idle Speed Increase Line Low
1034	Idle Speed Increase Line High
1035	Idle Speed Decrease Line Low
1036	Idle Speed Decrease Line High
1037	Throttle Position Sensor (TPS) Reads Low
1038	Park/Neutral Line High
1040	Latched B+ Line Low
1041	Latched B+ Line High
1042	No Latched B+ .5 Volt Drop
1048	Manual Vehicle Equipped With Automatic ECU
1049	Automatic Vehicle Equipped With Manual ECU
1050	Idle Speed Less Than 500 RPM
1051	Idle Speed Greater Than 2000 RPM
1052	Map Sensor Out Of Limits
1053	Change In Map Reading Out Of Limits
1054	Coolant Temperature Sensor Line Low
1055	Coolant Temperature Sensor Line High
1056	Inactive Coolant Temperature Sensor
1059	A/C Request Line Low
1060	A/C Request Line High
1061	A/C Select Line Low
1062	A/C Select Line High
1063	A/C Clutch Line Low
1064	A/C Clutch Line High
1065	O2 Sensor Reads Rich
1066	O2 Sensor Reads Lean
1067	Latch Relay Line Low
1068	Latch Relay Line High
1069	No Tach
1070	A/C Cut-Out Line Low
1071	A/C Cut-Out Line High
1073	ECU Does Not See Speed Sensor Signal
1200	ECU Defective
1202	All Injectors Shorted To Ground
1209	All Injectors Open
1218	No Voltage At ECU From B+ Latch Relay
1220	No Voltage At ECU From EGR Solenoid
1221	No Injector Voltage
1222	Ignition Control Module Not Grounded
1223	No ECU Tests Run

Dodge Monaco ES 1990 - DRB-II PROBLEMS & ERROR MESSAGES

If DRB-II screen is blank after attaching it and adapter to vehicle, ensure all connections are properly connected. Check for broken or shorted wires in the cables. Check diagnostic connector to ensure power is available to adapter. Ensure Jeep/Eagle cartridge is firmly installed in DRB-II.

Dodge Monaco ES 1990 - DIAGNOSTIC TROUBLE CODE (DTC) CHARTS

NOTE:

The following trouble shooting charts and illustrations are Courtesy of Chrysler Motors.

Dodge Monaco ES 1990 - FAULT 1000: IGNITION LINE LOW

Fig. 2: Dodge Monaco ES 1990 - Component Locations - Fault 1000: Circuit Diagram

Fig. 3: Dodge Monaco ES 1990 - Component Locations - Fault 1000: Flow Chart (1 of 2)

Fig. 4: Dodge Monaco ES 1990 - Component Locations - Fault 1000: Flow Chart (2 of 2)

Dodge Monaco ES 1990 - FAULT 1001: IGNITION LINE HIGH

Fig. 5: Dodge Monaco ES 1990 - Component Locations - Fault 1001: Circuit Diagram

Fig. 6: Dodge Monaco ES 1990 - Component Locations - Fault 1001: Flow Chart (1 of 2)

Fig. 7: Dodge Monaco ES 1990 - Component Locations - Fault 1001: Flow Chart (2 of 2)

Dodge Monaco ES 1990 - FAULT 1002: CHECKING VEHICLE CONFIGURATION

Fig. 8: Dodge Monaco ES 1990 - Component Locations - Fault 1002: Flow Chart & DRB II

Dodge Monaco ES 1990 - FAULT 1004: BATTERY VOLTAGE LOW

Fig. 9: Dodge Monaco ES 1990 - Component Locations - Fault 1004: Flow Chart & Circuit Diagram

Dodge Monaco ES 1990 - FAULT 1005: SENSOR GROUND LINE OUT OF LIMITS

Fig. 10: Dodge Monaco ES 1990 - Component Locations - Fault 1005: Circuit Diagram

Fig. 11: Dodge Monaco ES 1990 - Component Locations - Fault 1005: Flow Chart

Dodge Monaco ES 1990 - FAULT 1010: DIAGNOSTIC ENABLE LINE LOW

Fig. 12: Dodge Monaco ES 1990 - Component Locations - Fault 1010: Flow Chart & Circuit Diagram

Dodge Monaco ES 1990 - FAULT 1011: DIAGNOSTIC ENABLE LINE HIGH

Fig. 13: Dodge Monaco ES 1990 - Component Locations - Fault 1011: Flow Chart & Circuit Diagram

Dodge Monaco ES 1990 - FAULT 1012: IGNITION CONTROL MODULE LINE LOW

Fig. 14: Dodge Monaco ES 1990 - Component Locations - Fault 1012: Circuit Diagram

Fig. 15: Dodge Monaco ES 1990 - Component Locations - Fault 1012: Flow Chart

Dodge Monaco ES 1990 - FAULT 1013: IGNITION CONTROL MODULE LINE HIGH

Fig. 16: Dodge Monaco ES 1990 - Component Locations - Fault 1013: Circuit Diagram

Fig. 17: Dodge Monaco ES 1990 - Component Locations - Fault 1013: Flow Chart

Dodge Monaco ES 1990 - FAULT 1014: FUEL PUMP LINE LOW

Fig. 18: Dodge Monaco ES 1990 - Component Locations - Fault 1014: Circuit Diagram

Fig. 19: Dodge Monaco ES 1990 - Component Locations - Fault 1014: Flow Chart (1 of 3)

Fig. 20: Dodge Monaco ES 1990 - Component Locations - Fault 1014: Flow Chart (2 of 3)

Fig. 21: Dodge Monaco ES 1990 - Component Locations - Fault 1014: Flow Chart (3 of 3)

Dodge Monaco ES 1990 - FAULT 1015: FUEL PUMP LINE HIGH

Fig. 22: Dodge Monaco ES 1990 - Component Locations - Fault 1015: Circuit Diagram

Fig. 23: Dodge Monaco ES 1990 - Component Locations - Fault 1015: Flow Chart (1 of 2)

Fig. 24: Dodge Monaco ES 1990 - Component Locations - Fault 1015: Flow Chart (2 of 2)

Dodge Monaco ES 1990 - FAULT 1016: MAT SENSOR LINE LOW

Fig. 25: Dodge Monaco ES 1990 - Component Locations - Fault 1016: Circuit Diagram

Fig. 26: Dodge Monaco ES 1990 - Component Locations - Fault 1016: Flow Chart

Dodge Monaco ES 1990 - FAULT 1017: MAT SENSOR LINE HIGH

Fig. 27: Dodge Monaco ES 1990 - Component Locations - Fault 1017: Circuit Diagram

Fig. 28: Dodge Monaco ES 1990 - Component Locations - Fault 1017: Flow Chart (1 of 2)

Fig. 29: Dodge Monaco ES 1990 - Component Locations - Fault 1017: Flow Chart (2 of 2)

Dodge Monaco ES 1990 - FAULT 1021: NO START DUE TO MECHANICAL, FUEL OR IGN PROBLEM

Fig. 30: Dodge Monaco ES 1990 - Component Locations - Fault 1021: Circuit Diagram

Fig. 31: Dodge Monaco ES 1990 - Component Locations - Fault 1021: Flow Chart (1 of 3)

Fig. 32: Dodge Monaco ES 1990 - Component Locations - Fault 1021: Flow Chart (2 of 3)

Fig. 33: Dodge Monaco ES 1990 - Component Locations - Fault 1021: Flow Chart (3 of 3)

Dodge Monaco ES 1990 - FAULT 1022: START LINE LOW

Fig. 34: Dodge Monaco ES 1990 - Component Locations - Fault 1022: Circuit Diagram

Fig. 35: Dodge Monaco ES 1990 - Component Locations - Fault 1022: FLow Chart(1 of 2)

Fig. 36: Dodge Monaco ES 1990 - Component Locations - Fault 1022: Flow Chart (2 of 2)

Dodge Monaco ES 1990 - FAULT 1024: ECU DOES NOT SEE START SIGNAL

Fig. 37: Dodge Monaco ES 1990 - Component Locations - Fault 1024: Circuit Diagram

Fig. 38: Dodge Monaco ES 1990 - Component Locations - Fault 1024: Flow Chart (1 of 2)

Fig. 39: Dodge Monaco ES 1990 - Component Locations - Fault 1024: Flow Chart (2 of 2)

Dodge Monaco ES 1990 - FAULT 1027: ECU SEES WIDE OPEN THROTTLE (WOT)

Fig. 40: Dodge Monaco ES 1990 - Component Locations - Fault 1027: Circuit Diagram

Fig. 41: Dodge Monaco ES 1990 - Component Locations - Fault 1027: Flow Chart

Dodge Monaco ES 1990 - FAULT 1028: ECU DOES NOT SEE WOT

Fig. 42: Dodge Monaco ES 1990 - Component Locations - Fault 1028: Circuit Diagram

Fig. 43: Dodge Monaco ES 1990 - Component Locations - Fault 1028: Flow Chart

Dodge Monaco ES 1990 - FAULT 1031: ECU SEES CLOSED THROTTLE

Fig. 44: Dodge Monaco ES 1990 - Component Locations - Fault 1031: Circuit Diagram

Fig. 45: Dodge Monaco ES 1990 - Component Locations - Fault 1031: Flow Chart (1 of 2)

Fig. 46: Dodge Monaco ES 1990 - Component Locations - Fault 1031: Flow Chart (2 of 2)

Dodge Monaco ES 1990 - FAULT 1032: ECU DOES NOT SEE CLOSED THROTTLE

Fig. 47: Dodge Monaco ES 1990 - Component Locations - Fault 1032: Flow Chart

Dodge Monaco ES 1990 - FAULT 1033: IDLE SPEED INCREASE LINE LOW

Fig. 48: Dodge Monaco ES 1990 - Component Locations - Fault 1033: FLow Chart & Circuit Diagram

Dodge Monaco ES 1990 - FAULT 1034: IDLE SPEED INCREASE LINE HIGH

Fig. 49: Dodge Monaco ES 1990 - Component Locations - Fault 1034: Circuit Diagram

Fig. 50: Dodge Monaco ES 1990 - Component Locations - Fault 1034: Flow Chart

Dodge Monaco ES 1990 - FAULT 1035: IDLE SPEED DECREASE LINE LOW

Fig. 51: Dodge Monaco ES 1990 - Component Locations - Fault 1035: Circuit Diagram

Fig. 52: Dodge Monaco ES 1990 - Component Locations - Fault 1035: Flow Chart

Dodge Monaco ES 1990 - FAULT 1036: IDLE SPEED DECREASE LINE HIGH

Fig. 53: Dodge Monaco ES 1990 - Component Locations - Fault 1036: Circuit Diagram

Fig. 54: Dodge Monaco ES 1990 - Component Locations - Fault 1036: Flow Chart (1 of 3)

Fig. 55: Dodge Monaco ES 1990 - Component Locations - Fault 1036: Flow Chart (2 of 3)

Fig. 56: Dodge Monaco ES 1990 - Component Locations - Fault 1036: Flow Chart (3 of 3)

Dodge Monaco ES 1990 - FAULT 1037: TPS READS LOW

Fig. 57: Dodge Monaco ES 1990 - Component Locations - Fault 1037: Circuit Diagram

Fig. 58: Dodge Monaco ES 1990 - Component Locations - Fault 1037: Flow Chart (1 of 2)

Fig. 59: Dodge Monaco ES 1990 - Component Locations - Fault 1037: Flow Chart (2 of 2)

Dodge Monaco ES 1990 - FAULT 1038: PARK/NEUTRAL LINE HIGH

Fig. 60: Dodge Monaco ES 1990 - Component Locations - Fault 1038: Circuit Diagram

Fig. 61: Dodge Monaco ES 1990 - Component Locations - Fault 1038: Flow Chart (1 of 2)

Fig. 62: Dodge Monaco ES 1990 - Component Locations - Fault 1038: Flow Chart (2 of 2)

Dodge Monaco ES 1990 - FAULT 1040: LATCHED B+ LINE LOW

Fig. 63: Dodge Monaco ES 1990 - Component Locations - Fault 1040: Circuit Diagram

Fig. 64: Dodge Monaco ES 1990 - Component Locations - Fault 1040: Flow Chart (1 of 2)

Fig. 65: Dodge Monaco ES 1990 - Component Locations - Fault 1040: Flow Chart (2 of 2)

Dodge Monaco ES 1990 - FAULT 1041: LATCHED B+ LINE HIGH

Fig. 66: Dodge Monaco ES 1990 - Component Locations - Fault 1041: Circuit Diagram

Fig. 67: Dodge Monaco ES 1990 - Component Locations - Fault 1041: Flow Chart

Dodge Monaco ES 1990 - FAULT 1042: NO LATCHED B+ .5 VOLT DROP

Fig. 68: Dodge Monaco ES 1990 - Component Locations - Fault 1042: Circuit Diagram

Fig. 69: Dodge Monaco ES 1990 - Component Locations - Fault 1042: Flow Chart (1 of 2)

Fig. 70: Dodge Monaco ES 1990 - Component Locations - Fault 1042: Flow Chart (2 of 2)

Dodge Monaco ES 1990 - FAULT 1048: M/T VEHICLE EQUIPPED WITH A/T ECU

Retest to ensure correct information was entered in the tester. Manual transmissions are not available. Ensure AUTO ZF TRANS is selected.

Use STATE DISPLAY function to determine type of ECU tester has identified.

• PRG = CO or PRG = C1 CAL = OC (Automatic)
• PRG = CO or PRG = C1 CAL = 8C (Manual)

Dodge Monaco ES 1990 - FAULT 1049: A/T VEHICLE EQUIPPED WITH M/T ECU

The tester has identified that a manual ECU is installed in this vehicle. Retest to ensure correct information was entered in the tester. Ensure AUTO ZF TRANS is selected.

Use STATE DISPLAY function to determine type of ECU tester has identified.

• PRG = CO or PRG = C1 CAL = OC (Automatic)
• PRG = CO or PRG = C1 CAL = 8C (Manual)

Dodge Monaco ES 1990 - FAULT 1050: IDLE SPEED LESS THAN 500 RPM

Fig. 71: Dodge Monaco ES 1990 - Component Locations - Fault 1050: Circuit Diagram

Fig. 72: Dodge Monaco ES 1990 - Component Locations - Fault 1050: Flow Chart (1 of 3)

Fig. 73: Dodge Monaco ES 1990 - Component Locations - Fault 1050: Flow Chart (2 of 3)

Fig. 74: Dodge Monaco ES 1990 - Component Locations - Fault 1050: Flow Chart (3 of 3)

Dodge Monaco ES 1990 - FAULT 1051: IDLE SPEED GREATER THAN 2000 RPM

Fig. 75: Dodge Monaco ES 1990 - Component Locations - Fault 1051: Circuit Diagram

Fig. 76: Dodge Monaco ES 1990 - Component Locations - Fault 1051: Flow Chart (1 of 2)

Fig. 77: Dodge Monaco ES 1990 - Component Locations - Fault 1051: Flow Chart (2 of 2)

Dodge Monaco ES 1990 - FAULT 1052: MAP SENSOR OUT OF LIMITS

Fig. 78: Dodge Monaco ES 1990 - Component Locations - Fault 1052: Circuit Diagram

Fig. 79: Dodge Monaco ES 1990 - Component Locations - Fault 1052: Flow Chart (1 of 2)

Fig. 80: Dodge Monaco ES 1990 - Component Locations - Fault 1052: Flow Chart (2 of 2)

Dodge Monaco ES 1990 - FAULT 1053: CHANGE IN MAP READING OUT OF LIMITS

Fig. 81: Dodge Monaco ES 1990 - Component Locations - Fault 1053: Circuit Diagram

Fig. 82: Dodge Monaco ES 1990 - Component Locations - Fault 1053: Flow Chart (1 of 2)

Fig. 83: Dodge Monaco ES 1990 - Component Locations - Fault 1053: Flow Chart (2 of 2)

Dodge Monaco ES 1990 - FAULT 1054: COOLANT TEMP SENSOR LINE LOW

Fig. 84: Dodge Monaco ES 1990 - Component Locations - Fault 1054: Circuit Diagram

Fig. 85: Dodge Monaco ES 1990 - Component Locations - Fault 1054: Flow Chart (1 of 2)

Fig. 86: Dodge Monaco ES 1990 - Component Locations - Fault 1054: Flow Chart (2 of 2)

Dodge Monaco ES 1990 - FAULT 1055: COOLANT TEMP SENSOR LINE HIGH

Fig. 87: Dodge Monaco ES 1990 - Component Locations - Fault 1055: Circuit Diagram

Fig. 88: Dodge Monaco ES 1990 - Component Locations - Fault 1055: Flow Chart (1 of 2)

Fig. 89: Dodge Monaco ES 1990 - Component Locations - Fault 1055: Flow Chart (2 of 2)

Dodge Monaco ES 1990 - FAULT 1056: INACTIVE COOLANT TEMPERATURE SENSOR

Fig. 90: Dodge Monaco ES 1990 - Component Locations - Fault 1056: Flow Chart & Resistance Table

Dodge Monaco ES 1990 - FAULT 1059: A/C REQUEST LINE LOW

Fig. 91: Dodge Monaco ES 1990 - Component Locations - Fault 1059: Circuit Diagram

Fig. 92: Dodge Monaco ES 1990 - Component Locations - Fault 1059: Flow Chart

Dodge Monaco ES 1990 - FAULT 1060: A/C REQUEST LINE HIGH

Fig. 93: Dodge Monaco ES 1990 - Component Locations - Fault 1060: Circuit Diagram

Fig. 94: Dodge Monaco ES 1990 - Component Locations - Fault 1060: Flow Chart

Dodge Monaco ES 1990 - FAULT 1061: A/C SELECT LINE LOW

Fig. 95: Dodge Monaco ES 1990 - Component Locations - Fault 1061: Circuit Diagram

Fig. 96: Dodge Monaco ES 1990 - Component Locations - Fault 1061: Flow Chart

Dodge Monaco ES 1990 - FAULT 1062: A/C SELECT LINE HIGH

Fig. 97: Dodge Monaco ES 1990 - Component Locations - Fault 1062: Circuit Diagram

Fig. 98: Dodge Monaco ES 1990 - Component Locations - Fault 1062: Flow Chart

Dodge Monaco ES 1990 - FAULT 1063: A/C CLUTCH LINE LOW

Fig. 99: Dodge Monaco ES 1990 - Component Locations - Fault 1063: Circuit Diagram

Fig. 100: Dodge Monaco ES 1990 - Component Locations - Fault 1063: Flow Chart (1 of 2)

Fig. 101: Dodge Monaco ES 1990 - Component Locations - Fault 1063: Flow Chart (2 of 2)

Dodge Monaco ES 1990 - FAULT 1064: A/C CLUTCH LINE HIGH

Fig. 102: Dodge Monaco ES 1990 - Component Locations - Fault 1064: Circuit Diagram

Fig. 103: Dodge Monaco ES 1990 - Component Locations - Fault 1064: Flow Chart

Dodge Monaco ES 1990 - FAULT 1065: O2 SENSOR READS RICH

Fig. 104: Dodge Monaco ES 1990 - Component Locations - Fault 1065: Circuit Diagram

Fig. 105: Dodge Monaco ES 1990 - Component Locations - Fault 1065: Flow Chart

Dodge Monaco ES 1990 - FAULT 1066: O2 SENSOR READS LEAN

Fig. 106: Dodge Monaco ES 1990 - Component Locations - Fault 1066: Circuit Diagram

Fig. 107: Dodge Monaco ES 1990 - Component Locations - Fault 1066: Flow Chart (1 of 2)

Fig. 108: Dodge Monaco ES 1990 - Component Locations - Fault 1066: Flow Chart (2 of 2)

Dodge Monaco ES 1990 - FAULT 1067: LATCH RELAY LINE LOW

Fig. 109: Dodge Monaco ES 1990 - Component Locations - Fault 1067: Circuit Diagram (Flow Chart 1)

Fig. 110: Dodge Monaco ES 1990 - Component Locations - Fault 1067: Flow Chart (1 of 3)

Fig. 111: Dodge Monaco ES 1990 - Component Locations - Fault 1067: Circuit Diagram (Flow Chart 2 & 3)

Fig. 112: Dodge Monaco ES 1990 - Component Locations - Fault 1067: Flow Chart (2 of 3)

Fig. 113: Dodge Monaco ES 1990 - Component Locations - Fault 1067: Flow Chart (3 of 3)

Dodge Monaco ES 1990 - FAULT 1068: LATCH RELAY LINE HIGH

Fig. 114: Dodge Monaco ES 1990 - Component Locations - Fault 1068: Circuit Diagram

Fig. 115: Dodge Monaco ES 1990 - Component Locations - Fault 1068: Flow Chart (1 of 2)

Fig. 116: Dodge Monaco ES 1990 - Component Locations - Fault 1068: Flow Chart (2 of 2)

Dodge Monaco ES 1990 - FAULT 1069: NO TACH

Fig. 117: Dodge Monaco ES 1990 - Component Locations - Fault 1069: Circuit Diagram

Fig. 118: Dodge Monaco ES 1990 - Component Locations - Fault 1069: Flow Chart (1 of 2)

Fig. 119: Dodge Monaco ES 1990 - Component Locations - Fault 1069: Flow Chart (2 of 2)

Dodge Monaco ES 1990 - FAULT 1070: A/C CUT-OUT LINE LOW

Fig. 120: Dodge Monaco ES 1990 - Component Locations - Fault 1070: Circuit Diagram

Fig. 121: Dodge Monaco ES 1990 - Component Locations - Fault 1070: Flow Chart

Dodge Monaco ES 1990 - FAULT 1071: A/C CUT-OUT LINE HIGH

Fig. 122: Dodge Monaco ES 1990 - Component Locations - Fault 1071: Flow Chart & Circuit Diagram

Dodge Monaco ES 1990 - FAULT 1073: ECU DOES NOT SEE SPEED SENSOR SIGNAL

Fig. 123: Dodge Monaco ES 1990 - Component Locations - Fault 1073: Circuit Diagram

Fig. 124: Dodge Monaco ES 1990 - Component Locations - Fault 1073: Flow Chart

Dodge Monaco ES 1990 - FAULT 1200: ECU DEFECTIVE

Fig. 125: Dodge Monaco ES 1990 - Component Locations - Fault 1200: Flow Chart & Circuit Diagram

Dodge Monaco ES 1990 - FAULT 1202: ALL INJECTORS SHORTED TO GROUND

Fig. 126: Dodge Monaco ES 1990 - Component Locations - Fault 1202: Circuit Diagram

Fig. 127: Dodge Monaco ES 1990 - Component Locations - Fault 1202: Flow Chart (1 of 3)

Fig. 128: Dodge Monaco ES 1990 - Component Locations - Fault 1202: Flow Chart (2 of 3)

Fig. 129: Dodge Monaco ES 1990 - Component Locations - Fault 1202: Flow Chart (3 of 3)

Dodge Monaco ES 1990 - FAULT 1209: ALL INJECTORS OPEN

Fig. 130: Dodge Monaco ES 1990 - Component Locations - Fault 1209: Circuit Diagram

Fig. 131: Dodge Monaco ES 1990 - Component Locations - Fault 1209: Flow Chart

Dodge Monaco ES 1990 - FAULT 1218: NO VOLTAGE AT ECU FROM B+ LATCH RELAY

Fig. 132: Dodge Monaco ES 1990 - Component Locations - Fault 1218: Circuit Diagram

Fig. 133: Dodge Monaco ES 1990 - Component Locations - Fault 1218: Flow Chart (1 of 2)

Fig. 134: Dodge Monaco ES 1990 - Component Locations - Fault 1218: Flow Chart (2 of 2)

Dodge Monaco ES 1990 - FAULT 1220: NO VOLTAGE AT ECU FROM EGR SOLENOID

Fig. 135: Dodge Monaco ES 1990 - Component Locations - Fault 1220: Circuit Diagram

Fig. 136: Dodge Monaco ES 1990 - Component Locations - Fault 1220: Flow Chart

Dodge Monaco ES 1990 - FAULT 1221: NO INJECTOR VOLTAGE

Fig. 137: Dodge Monaco ES 1990 - Component Locations - Fault 1221: Circuit Diagram

Fig. 138: Dodge Monaco ES 1990 - Component Locations - Fault 1221: Flow Chart

Dodge Monaco ES 1990 - FAULT 1222: IGNITION CONTROL MODULE NOT GROUNDED

Fig. 139: Dodge Monaco ES 1990 - Component Locations - Fault 1222: Circuit Diagram

Fig. 140: Dodge Monaco ES 1990 - Component Locations - Fault 1222: Flow Chart

Dodge Monaco ES 1990 - FAULT 1223: NO ECU TESTS RUN

The ECU controlling Monaco & Premier 3.0L engines, provides limited on-board diagnostics. ECU based tests are performed with key ON. Check for short circuit to source and ground. Check for open circuits to fuel injectors, A/C relay "B+" power latch relay, EGR solenoid, and ignition control module.

Tests will not run if injector supply voltage (supplied through fuel pump) is low after one tenth of a second from key ON or engine crank is sensed within that tenth of a second.

Dodge Monaco ES 1990 - CRANK SENSED

Retesting with key ON only and ensuring operator DOES NOT crank engine will eliminate this possibility.

Dodge Monaco ES 1990 - INJECTOR LOW VOLTAGE

This usually caused by a slow fuel pump relay (low battery voltage should be checked prior to ECU test). Trying another relay will eliminate this possibility.

NOTE:

This fault does not imply there is malfunction with the system. It simply implies that a small part of diagnostic test was not run.