2003 HONDA Accord

Honda Accord DX 2003 - BUZZERS, RELAYS & TIMERS

Honda Accord DX 2003 BUZZERS, RELAYS & TIMERS LOCATION

Component	Component Location
Accessory Power Socket Relay	In driver's underdash fuse/relay box.
A/C Compressor Clutch Relay	In underhood fuse/relay box.
A/F Sensor Relay	In driver's underdash fuse/relay box.
Blower Motor Relay	In underhood fuse/relay box.
Condenser Fan Relay	In underhood fuse/relay box.
DRL Relay	In underhood multi-relay box. See Fig. 7 .
Fan Control Relay	In underhood multi-relay box.
Ignition Coil Relay	In driver's underdash fuse/relay box.
Moon Roof Close Relay	At rear of roof.
Moon Roof Open Relay	At rear of roof.
PGM-FI Main Relay 2	In driver's underdash fuse/relay box.
Power Window Relay	In driver's underdash fuse/relay box.
Radiator Fan Relay	In underhood fuse/relay box.
Rear Window Defogger Relay	In underhood fuse/relay box.
Seat Heater Relay	Behind glove box. See Fig. 10 .
Starter Cut Relay	In driver's underdash fuse/relay box.
Turn Signal/Hazard Relay	In driver's underdash fuse/relay box.

Honda Accord DX 2003 - CIRCUIT PROTECTION DEVICES

Honda Accord DX 2003 CIRCUIT PROTECTION DEVICES LOCATION

Component	Component Location
Fuse/Relay Box (2.4L)	On left rear corner of engine compartment, attached to underhood fuse/relay box. See Fig. 7 .
Multi-Relay Box (3.0L)	On left rear corner of engine compartment, attached to underhood fuse/relay box. See Fig. 7 .
Underdash Fuse/Relay Box	Behind left kick panel. See Fig. 9 .
Underhood Fuse/Relay Box	On left rear corner of engine compartment, forward of strut tower. See Fig. 7 .

Honda Accord DX 2003 - CONTROL UNITS

Honda Accord DX 2003 CONTROL UNITS LOCATION

Component	Component Location
ABS Modulator Unit	At left front of engine compartment.
ABS-TCS Control Unit	Behind right side of engine compartment.
Audio-HVAC Display Module	Behind center of dash. See Fig. 10 .
Cruise Control Unit	Behind left side of dash. See Fig. 9 .
ECM/PCM	Under middle of dash. See Fig. 10 .
Gauge Control Module	Behind instrument cluster. See Fig. 8 .
Immobilizer Control Unit Receiver	In steering column cover. See Fig. 8 .
Moon Roof Control Unit	At rear of roof.
Navigation Unit	In trunk, at middle of rear shelf. See Fig. 14 .
OPDS Unit	In front passenger's seat back.
PCM	Behind center of dash, forward of floor console.
SRS Unit	Under middle of dash.
Throttle Actuator Control Module	Under right side of dash. See Fig. 11 .

Honda Accord DX 2003 - MOTORS

Honda Accord DX 2003 MOTORS LOCATION

Component	Component Location
ABS Modulator Unit	At left front of engine compartment.
Air Mix Control Motor (Except EX & LX)	Under left side of dash. See Fig. 12 .
Blower Motor	Under right side of dash. See Fig. 10 .
Driver's Air Mix Control Motor (Except EX & LX)	Under left side of dash. See Fig. 12 .
Front Passenger's Air Mix Control Motor	Under right side of dash. See Fig. 12 .
Mode Control Motor	Behind glove box. See Fig. 12 .
Moon Roof Motor	Under headliner, above center of rear window.
Recirculation Control Motor	Behind glove box, on blower unit. See Fig. 12 .
Windshield Washer Motor	On bottom of windshield washer fluid reservoir.
Windshield Wiper Motor	On left side of air scoop.

Honda Accord DX 2003 - SENDING UNITS & SENSORS

Honda Accord DX 2003 SENDING UNITS & SENSORS LOCATION

Component	Component Location
A/F Sensor	On exhaust manifold. See Fig. 1 .
APP Sensor	At right side of engine compartment. See Fig. 11 .
ATF Temperature Sensor	On transmission. See Fig. 6 .
CMP Sensor A (2.4L)	At right rear of engine. See Fig. 1 .
CMP Sensor B (2.4L)	At right rear of engine. See Fig. 1 .
CMP Sensor (3.0L)	At left front of engine. See Fig. 5 .
CKP Sensor (2.4L)	At left front of engine. See Fig. 2 .
Countershaft Speed Sensor (2.4L)	On top left of transaxle. See Fig. 2 .
Countershaft Speed Sensor (3.0L)	On top right of transaxle. See Fig. 5 .
Driver's Side Impact Sensor	At left "B" pillar.
ECT Sensor (2.4L)	On right rear of cylinder head. See Fig. 2 .
ECT Sensor (3.0L)	On left rear of engine. See Fig. 4 .
EGR Valve & EGR Valve Position Sensor (2.4L)	On rear of intake manifold.
EGR Valve & EGR Valve Position Sensor (3.0L)	On left rear of engine.
Evaporator Temperature Sensor	Behind glove box, in evaporator unit. See Fig. 12 .
Front A/F Sensor (Bank No. 2, Sensor No. 1)	In right exhaust bank, before catalytic converter. See Fig. 5 .
Front Passenger's Side Impact Sensor	Under front passenger's seat. See Fig. 14 .
Front Secondary HO2S (Bank No. 2, Sensor No. 2)	In right exhaust bank, before catalytic converter. See Fig. 4 .
Fuel Tank Pressure Sensor	Under left rear of vehicle, in fuel tank. See Fig. 13 .
IAT Sensor (2.4L)	On left rear intake manifold. See Fig. 1 .
IAT Sensor (3.0L)	On top left rear of intake manifold. See Fig. 4 .
In-Car Temperature Sensor	Under middle of dash. See Fig. 8 .
Knock Sensor	On lower left side of engine, below exhaust manifold.
Left Impact Sensor	At left front of engine compartment, behind left headlight.
MAF Sensor (2.4L)	At left side of engine compartment. See Fig. 1 .
Mainshaft Speed Sensor (2.4L)	On rear of transaxle. See Fig. 1 .
Mainshaft Speed Sensor (3.0L)	On left rear of transaxle. See Fig. 4 .
MAP Sensor (2.4L)	At left side of engine. See Fig. 1 .
MAP Sensor (3.0L)	At left side of engine compartment. See Fig. 5 .
Moon Roof Limit Sensor	At rear of roof.
Outside Air Temperature Sensor	Below center of front bumper. See Fig. 7 .
Rear A/F Sensor (Bank No. 1, Sensor No. 1)	At rear of engine compartment. See Fig. 4 .
Rear Secondary HO2S (Bank No. 1, Sensor No. 2)	At rear of engine compartment. See Fig. 5 .
Right Front Impact Sensor	At right front of engine compartment.
Secondary HO2S	On TWC converter.
Sunlight Sensor	On center front of dash. See Fig. 10 .
TP Sensor (2.4L)	On throttle body. See Fig. 2 .
TP Sensor/Throttle Actuator (3.0L)	On throttle body. See Fig. 4 .
Wheel Speed Sensor (Left Front)	On left front suspension knuckle.
Wheel Speed Sensor (Left Rear)	On left rear suspension knuckle.
Wheel Speed Sensor (Right Front)	On right front suspension knuckle.
Wheel Speed Sensor (Right Rear)	On right rear suspension knuckle. See Fig. 14 .

Honda Accord DX 2003 - SOLENOIDS & SOLENOID VALVES

Honda Accord DX 2003 SOLENOIDS & SOLENOID VALVES LOCATION

Component	Component Location
A/T Clutch Pressure Control Solenoid Valve A (2.4L)	On left side of transaxle.
A/T Clutch Pressure Control Solenoid Valve A (3.0L)	On top rear of transaxle. See Fig. 5 .
A/T Clutch Pressure Control Solenoid Valve B (2.4L)	On left side of transaxle. See Fig. 2 .
A/T Clutch Pressure Control Solenoid Valve B (3.0L)	On top rear of transaxle. See Fig. 4 .
A/T Clutch Pressure Control Solenoid Valve C (2.4L)	On left side of transaxle. See Fig. 1 .
A/T Clutch Pressure Control Solenoid Valve C (3.0L)	On left side of transaxle. See Fig. 4 .
Cruise Control Actuator	At right side of firewall.
EGR Valve & EGR Valve Position Sensor (2.4L)	At rear of engine. See Fig. 2 .
EGR Valve & EGR Valve Position Sensor (3.0L)	At right front top corner of engine.
Engine Mount Control Solenoid Valve (2.4L)	On left front of engine. See Fig. 1 .
Engine Mount Control Solenoid Valve (3.0L)	On left rear of engine compartment. See Fig. 5 .
EVAP Canister Purge Valve (2.4L)	On right side of intake manifold. See Fig. 1 .
EVAP Canister Purge Valve (3.0L)	On right side of engine. See Fig. 4 .
EVAP Canister Vent Shut Valve	On underside of vehicle, on EVAP control canister.
IAC Valve (2.4L)	On left side of intake manifold. See Fig. 2 .
IMRC Valve (3.0L)	At front of engine. See Fig. 4 .
Shift Control Solenoid Valve A (3.0L)	On top front of transaxle. See Fig. 4 .
Shift Control Solenoid Valve B (3.0L)	On left side of transaxle. See Fig. 4 .
Shift Control Solenoid Valve C (3.0L)	On top front of transaxle. See Fig. 4 .
Shift Lock Solenoid	Under floor console, on bottom right of gear selector lever. See Fig. 10 .
Torque Converter Clutch Solenoid Valve (3.0L)	On top front of transaxle. See Fig. 4 .
VTC Oil Control Solenoid Valve (2.4L)	At front of engine. See Fig. 1 .
VTEC Oil Control Solenoid Valve (2.4L)	At front of engine.
VTEC Solenoid Valve (2.4L)	On right front of engine. See Fig. 1 .
VTEC Solenoid Valve (3.0L)	On right front of engine. See Fig. 5 .

Honda Accord DX 2003 - SWITCHES

Honda Accord DX 2003 SWITCHES LOCATION

Component	Component Location
A/C Pressure Switch	At right front of engine compartment, near front bumper.
Back-Up Light Switch (2.4L)	On top left of transaxle. See Fig. 1 .
Back-Up Light Switch (3.0L)	On top left of transaxle. See Fig. 5 .
Brake Fluid Level Switch	In brake fluid reservoir cap.
Brake Pedal Position Switch	On brake pedal support. See Fig. 8 .
Clutch Interlock Switch	On clutch pedal support.
Moon Roof Switch	At left side of dash.
Oil Pressure Switch (2.4L)	At front of engine. See Fig. 2 .
Oil Pressure Switch (3.0L)	At front of engine. See Fig. 4 .
Parking Brake Switch	Mounted under parking brake lever. See Fig. 10 .
Park Pin Switch	Below console, on shift lever. See Fig. 10 .
PSP Switch (2.4L)	At right side of engine compartment.
PSP Switch (3.0L)	At right rear of engine compartment, on power steering line.
Radiator Fan Switch (2.4L)	On left side of radiator.
Radiator Fan Switch (3.0L)	On left side of radiator. See Fig. 7 .
Security Hood Switch	At front of engine compartment, on hood lock/latch assembly. See Fig. 7 .
Transmission Range Switch (2.4L)	On rear of transaxle.
Trunk Key Cylinder Switch	At right rear of trunk. See Fig. 16 .
Trunk Latch Switch	At trunk latch/lock assembly. See Fig. 15 .
VTEC Oil Pressure Switch (2.4L)	On front of cylinder head. See Fig. 2 .
VTEC Oil Pressure Switch (3.0L)	On front of right cylinder head. See Fig. 5 .
Washer Fluid Level Switch	Behind right side of front bumper, on washer fluid reservoir.
2nd Clutch Pressure Switch (2.4L)	On left front of transaxle. See Fig. 2 .
3rd Clutch Pressure Switch (2.4L)	On side of transaxle. See Fig. 1 .
3rd Clutch Pressure Switch (3.0L)	On left rear of transaxle. See Fig. 6 .
4th Clutch Pressure Switch	On left rear of transaxle. See Fig. 5 .

Honda Accord DX 2003 - MISCELLANEOUS

Honda Accord DX 2003 MISCELLANEOUS LOCATION

Component	Component Location
A/C Diode	Under left side of dash.
Blower Power Transistor	On bottom of blower unit. See Fig. 10 .
DLC	On lower left of dash, above the kick panel. See Fig. 9 .
High Horn	At front of engine compartment, behind front grille. See Fig. 7 .
Junction Connector C101	At middle of right cylinder head.
Junction Connector C102	At left side of engine compartment.
Junction Connector C103	At left side of engine compartment.
Junction Connector C404	Below left side of dash.
Junction Connector C405	Below left side of dash.
Junction Connector C406	Below left side of dash.
Junction Connector C503	Behind glove box.
Junction Connector C552	Behind right kick panel.
Junction Connector C553	Behind right kick panel.
Junction Connector C554	Under right side of dash.
Junction Connector C555	Under right side of dash.
Junction Connector C556	Behind glove box.
Junction Connector C557	Behind glove box.
Junction Connector C702	At left "C" pillar.
Junction Connector C703	At left "C" pillar.
Junction Connector C752	At left "C" pillar.
Low Horn	At front of engine compartment, behind front grille. See Fig. 7 .
Seat Belt Tensioner (Driver's)	At base of left "B" pillar.
Seat Belt Tensioner (Front Passenger's)	At base of right "B" pillar.
Trailer Lighting Connector	On left rear of trunk. See Fig. 15 .
Window Antenna Coil	At left "C" pillar.

Honda Accord DX 2003 - CONNECTORS

Honda Accord DX 2003 CONNECTORS LOCATION

Component	Location
C101 (Gray, 6 Pin)	At center front of engine compartment. See Fig. 2 .
C108 (2.4L) (Gray, 8 Pin)	At left front side of engine compartment. See Fig. 2 .
C110 (3.0L) (Black, 6 Pin)	At right rear of engine compartment. See Fig. 4 .
C151 (Gray, 1 Pin)	At left side of engine compartment, near battery. See Fig. 5 .
C152 (2.4L) (Gray, 10 Pin)	At left front of engine compartment, near battery. See Fig. 1 .
C152 (3.0L) (Gray, 10 Pin)	At left rear of engine compartment. See Fig. 4 .
C153 (Black, 6 Pin)	On top of transmission housing. See Fig. 5 .
C154 (Black, 1 Pin)	On left front of engine. See Fig. 4 .
C201 (2.4L) (Black, 33 Pin)	At left rear of engine compartment. See Fig. 2 .
C201 (3.0L) (Black, 33 Pin)	At left rear of engine compartment. See Fig. 4 .
C202 (2.4L) (Gray, 33 Pin)	At left rear of engine compartment.
C202 (3.0L) (Gray, 33 Pin)	At left rear of engine compartment. See Fig. 5 .
C203 (2.4L) (Black, 1 Pin)	At left rear of engine compartment. See Fig. 2 .
C203 (3.0L) (Black, 23 Pin)	At left side of engine compartment. See Fig. 5 .
C251 (White, 13 Pin)	Under center right of dash. See Fig. 10 .
C281 (White, 13 Pin)	Under middle side of dash. See Fig. 11 .
C301 (Gray, 2 Pin)	Behind left side of front bumper. See Fig. 7 .
C310 (Brown, 3 Pin)	At left rear of engine compartment, forward of strut tower.
C311 (Gray/Black, 1 Pin)	At right side of engine compartment.
C401 (Brown, 20 Pin)	Under left side of dash. See Fig. 8 .
C402 (Brown, 5 Pin)	Under left side of dash. See Fig. 9 .
C403 (Yellow, 4 Pin)	Under left side of dash. See Fig. 8 .
C415 (Gray, 3 Pin)	Under left side of dash.
C416 (Gray, 2 Pin)	Under left side of dash.
C501 (White, 24 Pin)	Under left side of dash. See Fig. 9 .
C502 (Gray, 4 Pin)	Under left side of dash. See Fig. 9 .
C551 (Gray, 4 Pin)	Behind right kick panel. See Fig. 10 .
C552 (13 Pin)	Behind right kick panel. See Fig. 10 .
C553 (6 Pin)	Behind right kick panel. See Fig. 10 .
C601 (Gray, 8 Pin)	Under left side of dash. See Fig. 9 .
C631 (White, 20 Pin)	In driver's door.
C632 (Blue/White, 17 Pin)	In driver's door.
C651 (6 Pin)	Behind right kick panel. See Fig. 14 .
C701 (Coupe) (Gray, 8 Pin)	At left "C" pillar.
C701 (Sedan) (Gray, 8 Pin)	At left "C" pillar. See Fig. 16 .
C711 (Gray, 2 Pin)	Under left rear of vehicle. See Fig. 13 .
C731 (White, 13 Pin)	Behind glove box. See Fig. 10 .
C732 (Gray, 12 Pin)	Behind glove box. See Fig. 10 .
C751 (Gray, 10 Pin)	At left "B" pillar. See Fig. 13 .
C781 (Blue, 10 Pin)	At right "B" pillar. See Fig. 14 .
C801 (Gray, 4 Pin)	Under front passenger's seat. See Fig. 14 .
C851 (Blue/White, 21 Pin)	Under middle of dash. See Fig. 10 .
C901 (Gray, 10 Pin)	Under driver's seat. See Fig. 13 .
C902 (Gray, 10 Pin)	Under front passenger's seat. See Fig. 14 .

Honda Accord DX 2003 - GROUNDS

Honda Accord DX 2003 GROUNDS LOCATION

Component	Location
G1	At left front of engine compartment. See Fig. 3 .
G2	At right side of engine compartment. See Fig. 3 .
G3	At left side of engine compartment. See Fig. 3 .
G101 (2.4L)	At top middle of engine. See Fig. 1 .
G101 (3.0L)	Left side of engine compartment. See Fig. 4 .
G102	At right front side of engine. See Fig. 4 .
G151	On transmission housing. See Fig. 6 .
G201 (2.4L)	At right side of engine compartment.
G201 (3.0L)	At right front side of engine compartment.
G202 (2.4L)	At right side of engine compartment, near right front headlight.
G202 (3.0L)	At right rear side of engine compartment.
G203	At right side of engine compartment.
G301	At left side of front bumper. See Fig. 7 .
G302	Behind left side of front bumper.
G501	Behind left side of dash. See Fig. 8 .
G502	Behind left side of dash. See Fig. 8 .
G503	Behind glove box. See Fig. 10 .
G504	Under middle of dash. See Fig. 8 .
G505	Under center of dash. See Fig. 10 .
G506	Under center of dash. See Fig. 10 .
G601	At left side of floor. See Fig. 13 .
G602	At right side of floor. See Fig. 14 .
G603	Behind center of rear seats. See Fig. 13 .
G701 (Coupe)	At left side of trunk. See Fig. 15 .
G701 (Sedan)	At left side of trunk. See Fig. 16 .
G702	At left side of trunk. See Fig. 15 .