2003 INFINITI Q45

Infiniti Q45 2003 - BUZZERS, RELAYS & TIMERS

Infiniti Q45 2003 BUZZERS, RELAYS & TIMERS LOCATION

Component	Component Location
Accessory Relay	In fuse block (J/B) No. 1. See Fig. 4 .
Air Conditioner Relay	In fuse, fusible link & relay block (J/B). See Fig. 2 .
AT PV Ignition Relay	At right side of engine compartment. See Fig. 2 .
Back-Up Lamp Relay	In fuse, fusible link & relay box. See Fig. 2 .
Blower Relay	On back of fuse block (J/B) No. 2. See Fig. 6 .
Climate Controlled Seat Relay	At right side of engine compartment. See Fig. 2 .
Combination Flasher Unit	Behind dash, right side of center console. See Fig. 3 .
Door Mirror Defogger Relay	Above fuse block (J/B) No. 1. See Fig. 4 .
ECM Relay	On back of fuse block (J/B) No. 2. See Fig. 6 .
Front Wiper Relay	In fuse, fusible link & relay box. See Fig. 2 .
Fuel Pump Relay	On back of fuse block (J/B) No. 2. See Fig. 6 .
Headlamp Relay-1	In fuse, fusible link & relay block (J/B). See Fig. 2 .
Headlamp Relay-2	In fuse, fusible link & relay box. See Fig. 2 .
Horn Relay	In fuse, fusible link & relay block (J/B). See Fig. 2 .
ICC Brake Hold Relay	At right side of engine compartment. See Fig. 2 .
Ignition Relay	In fuse, fusible link & relay block (J/B). See Fig. 2 .
Park/Neutral Position Relay	In fuse, fusible link & relay block (J/B). See Fig. 2 .
Rear Window Defogger & Door Mirror Defogger Relay	Above fuse block (J/B) No. 1. See Fig. 4 .
Taillamp Relay	In fuse, fusible link & relay block (J/B). See Fig. 2 .
Throttle Control Motor Relay	In fuse, fusible link & relay box. See Fig. 2 .
Trunk Lid Opener Relay	In fuse box (J/B) No. 1. See Fig. 4 .
VDC Relay Box	Behind front grille. See Fig. 1 .

Infiniti Q45 2003 - CIRCUIT PROTECTION DEVICES

Infiniti Q45 2003 CIRCUIT PROTECTION DEVICES LOCATION

Component	Component Location
Engine Room Box	At right front of engine compartment. See Fig. 1 .
Fuse Block	At right side of engine compartment. See Fig. 2 .
Fuse Block (J/B) No. 1	Behind left end of dash. See Fig. 3 .
Fuse Block (J/B) No. 2	Behind right kick panel. See Fig. 3 .
Fuse, Fusible Link & Relay Block (J/B)	In engine room box. See Fig. 1 .
Fuse, Fusible Link & Relay Box	In engine room box. See Fig. 1 .

Infiniti Q45 2003 - CONTROL UNITS

Infiniti Q45 2003 CONTROL UNITS LOCATION

Component	Component Location
A/C Auto Amplifier	Behind right side of dash. See Fig. 3 .
Active Damper Suspension Control Unit	Behind left rear shock tower. See Fig. 5 .
Air Bag Diagnosis Sensor Unit	Under rear of center console. See Fig. 3 .
ASCD Control Unit	Behind dash, left of steering column. See Fig. 3 .
AV Control Unit (W/O NAVI)	Behind center of dash. See Fig. 3 .
AV & NAVI Control Unit (W/NAVI)	Under left side of rear parcel shelf. See Fig. 5 .
Body Control Module	Behind left kick panel. See Fig. 3 .
Driver's Seat Control Unit	Under driver's seat. See Fig. 3 .
Dual Mode Muffler Control Unit	At right side of trunk. See Fig. 5 .
Engine Control Module	Behind glove box. See Fig. 3 .
Fuel Pump Control Module	At right side of trunk. See Fig. 5 .
Headlamp Battery Saver Control Unit	Behind dash, left of steering column. See Fig. 3 .
ICC Unit	At right side of trunk. See Fig. 5 .
Low Tire Pressure Warning Control Unit	Behind center of dash. See Fig. 3 .
NATS IMMU	Behind dash, left of steering column. See Fig. 3 .
Power Steering Control Unit	Behind dash, right side of center console. See Fig. 3 .
Rear Power Seat Control Unit (Left & Right)	Under respective rear seat.
Rear View Camera Control Unit	At center front of trunk. See Fig. 5 .
Shift Lock Control Unit	Behind dash, left of steering column. See Fig. 3 .
Steering Lock Control Unit	Behind dash, right of steering column. See Fig. 3 .
Transmission Control Module	Behind glove box. See Fig. 3 .
Trunk Closure Control Unit	At center rear of trunk. See Fig. 5 .
VDC/TCS/ABS Control Unit	Behind right kick panel. See Fig. 3 .
Voice Activated Control Module	Left rear of trunk. See Fig. 5 .

Infiniti Q45 2003 - MOTORS

Infiniti Q45 2003 MOTORS LOCATION

Component	Component Location
Air Mix Door Motor	Behind right side of center console, on heater unit.
ASCD Pump	At right rear corner of engine compartment. See Fig. 1 .
Blower Motor	Below right side of dash, on intake unit.
Electric Throttle Control Actuator	On left side of engine. See Fig. 7 .
Front Washer Motor	In washer fluid reservoir.
Front Wiper Motor	On left side of firewall. See Fig. 1 .
Fuel Lid Opener Actuator	On right side of trunk. See Fig. 5 .
Fuel Pump	In fuel tank.
Intake Door Motor	Under right side of dash, on intake unit.
Left Front Shock Absorber Actuator	On top of left shock tower, under hood. See Fig. 1 .
Left Rear Shock Absorber Actuator	On top of left rear shock tower. See Fig. 5 .
Mode Door Motor	Behind right side of dash.
Rear Sunshade Unit	Under right side of rear parcel shelf. See Fig. 5 .
Rear Vent Door Motor	Behind left front of center console.
Right Front Shock Absorber Actuator	On top of right shock tower, under hood. See Fig. 1 .
Right Rear Shock Absorber Actuator	On top of right rear shock absorber. See Fig. 5 .
Sun Roof Motor Assembly	At front of sun roof opening.
Telescopic Motor	At right side of steering column.
Throttle Control Motor	Built into electric throttle control actuator. See Fig. 7 .
Tilt Motor	At right side of steering column.
VDC Actuator	Right rear of engine compartment. See Fig. 1 .

Infiniti Q45 2003 - SENDING UNITS & SENSORS

Infiniti Q45 2003 SENDING UNITS & SENSORS LOCATION

Component	Component Location
Accelerator Pedal Position Sensor	Built into electric throttle control actuator. See Fig. 7 .
Ambient Sensor	At center front of engine compartment.
Brake Pressure Sensor	At left rear of engine compartment.
Camshaft Position Sensor	On front of left cylinder head. See Fig. 7 .
Crankshaft Position Sensor	On rear of cylinder block.
Crash Zone Sensor	At center front of engine compartment.
Engine Coolant Temperature Sensor	On top rear of engine. See Fig. 7 .
EVAP Control System Pressure Sensor	In EVAP purge line.
Front Vertical G Sensor	At base of left kick panel.
Fuel Tank Gauge Unit	In fuel tank.
Heated Oxygen Sensor Bank No. 1 Sensor No. 1	On inlet of left manifold three-way catalyst.
Heated Oxygen Sensor Bank No. 1 Sensor No. 2	On inlet of right manifold three-way catalyst.
Heated Oxygen Sensor Bank No. 2 Sensor No. 1	On outlet of left manifold three-way catalyst.
Heated Oxygen Sensor Bank No. 2 Sensor No. 2	On outlet of right manifold three-way catalyst.
ICC Sensor	At front center of engine compartment.
Intake Air Temperature Sensor	Built into mass airflow sensor.
Intake Valve Timing Control Position Sensor (Bank No. 1)	On front of left cylinder head. See Fig. 7 .
Intake Valve Timing Control Position Sensor (Bank No. 2)	On front of right cylinder head. See Fig. 7 .
In-Vehicle Sensor	Below lower left side of dash.
Knock Sensor (Bank No. 1)	Below left side of intake manifold. See Fig. 7 .
Knock Sensor (Bank No. 2)	Below right side of intake manifold. See Fig. 7 .
Mass Airflow Sensor	Between air duct & air cleaner housing. See Fig. 7 .
Optical Sensor	On top right side of dash.
Power Steering Pressure Sensor	At lower right front of engine.
Radiator Coolant Temperature Sensor	At left side of radiator. See Fig. 7 .
Rear Vertical G Sensor	At right "C" pillar.
Refrigerant Pressure Sensor	At front right of engine compartment, near condenser. See Fig. 7 .
Steering Angle Sensor	At right side of steering column.
Sun Load Sensor	Behind left side of dash.
Telescopic Sensor	At right side of steering column.
Throttle Position Sensor	Built into electric throttle control actuator. See Fig. 7 .
Tilt Sensor	At right side of steering column.
Turbine Revolution Sensor	On top of transmission, behind bellhousing.
Vehicle Speed Sensor	On transmission rear extension.
Yaw Rate & G Sensor	Under center console.

Infiniti Q45 2003 - SOLENOIDS & SOLENOID VALVES

Infiniti Q45 2003 SOLENOIDS & SOLENOID VALVES LOCATION

Component	Component Location
Cooling Fan Speed Control Solenoid Valve	On front of engine. See Fig. 7 .
EVAP Canister Purge Volume Control Solenoid Valve	On top right rear of engine. See Fig. 7 .
EVAP Canister Vent Control Valve	Under rear of vehicle, on EVAP canister.
Fuel Lid Opener Actuator	On right side of trunk. See Fig. 5 .
Intake Valve Timing Control Solenoid Valve (Bank No. 1)	On top front of left cylinder head. See Fig. 7 .
Intake Valve Timing Control Solenoid Valve (Bank No. 2)	On top front of right cylinder head. See Fig. 7 .
Power Steering Solenoid Valve	On steering rack assembly.
Power Valve Actuator	Top right front of engine.
Trunk Lid Opener Actuator	At center rear of deck lid. See Fig. 5 .
Vacuum Cut Valve By-Pass Valve	Under rear of vehicle, forward of EVAP canister.
VIAS Control Solenoid Valve	Top front center of engine. See Fig. 7 .

Infiniti Q45 2003 - SWITCHES

Infiniti Q45 2003 SWITCHES LOCATION

Component	Component Location
ASCD Brake Switch	On bracket, above brake pedal.
Brake Fluid Level Switch	At left rear of engine compartment, on brake fluid reservoir.
Hood Switch	Near hood lock stay. See Fig. 1 .
ICC Brake Switch	On bracket, above brake pedal.
Oil Pressure Switch	On front center of engine.
Parking Brake Switch	Behind dash, at park brake assembly.
Stoplight Switch	On bracket, above brake pedal.
Throttle Position Switch	On throttle body.
Washer Level Switch	In washer fluid reservoir.

Infiniti Q45 2003 - MISCELLANEOUS

Infiniti Q45 2003 MISCELLANEOUS LOCATION

Component	Component Location
Antenna Amplifier	At right "C" pillar. See Fig. 5 .
BOSE Speaker Amplifier	At center front of trunk. See Fig. 5 .
Data Link Connector	Under left side of dash.
Fuses	In fuse, fusible link & relay box. See Fig. 2 .
Fusible Link (B)	In fuse, fusible link & relay box (J/B). See Fig. 2 .
Fusible Link (C To L)	In fuse, fusible link & relay box (J/B). See Fig. 2 .
ICC Warning Chime	Under left side of dash, near ASCD control unit.
Joint Connectors No. 1 & 2	Behind left side of dash, near fuse block.
Joint Connectors No. 3 & 4	Behind upper left side of dash.
Joint Connector No. 5	Behind left side of dash, taped to harness.
Joint Connectors No. 6, 7, 8 & 9	Behind center of dash.
Joint Connector No. 10	Behind left side of dash, near fuse block.
Joint Connector No. 11	Behind upper right side of dash, taped to harness.
Joint Connectors No. 12 & 13	Behind top center of dash, taped to harness.
Joint Connector No. 14	Behind upper right side of dash, taped to harness.
Joint Connectors No. 15, 16, 17 & 18	Behind upper right end of dash, taped to harness.
Joint Connector No. 19	Behind right end of dash, taped to harness.
Joint Connector No. 20	Behind right side of dash, taped to harness.
Joint Connector No. 21	Behind lower right end of dash, taped to harness.
Joint Connector No. 25	Behind left kick panel, taped to harness.
Joint Connectors No. 28, 29 & 30	Behind right kick panel, taped to harness.
Joint Connectors No. 36 & 37	Behind right rear shock tower, taped to harness.
Joint Connector No. 41	In left front door.
NATS Antenna Amplifier	Behind right side of dash.
Remote Keyless Entry Receiver	At left "C" pillar.

Infiniti Q45 2003 - CONNECTORS

Infiniti Q45 2003 CONNECTORS LOCATION

Component	Component Location
B5 (SMJ)	Behind left kick panel.
B6 (Gray, 24 Pin)	Behind left kick panel.
B7 (White, 24 Pin)	Behind left kick panel.
B11 (White, 20 Pin)	Behind left kick panel.
B12 (Brown, 6 Pin)	Behind left kick panel.
B21 (White, 15 Pin)	At left "B" pillar.
B22 (Gray, 15 Pin)	At left "B" pillar.
B61 (White, 12 Pin)	Behind right taillight assembly.
B62 (Brown, 8 Pin)	Behind right taillight assembly.
B63 (White, 10 Pin)	Behind right taillight assembly.
B64 (White, 16 Pin)	Behind right taillight assembly.
B65 (White, 2 Pin)	Behind right taillight assembly.
B66 (White, 3 Pin)	Behind right taillight assembly.
B68 (Yellow, 2 Pin)	Behind left taillight assembly.
B202 (White, 4 Pin)	At right front door sill.
B203 (White, 4 Pin)	At right front door sill.
B204 (Brown, 6 Pin)	Behind right kick panel.
B205 (White, 20 Pin)	Behind right kick panel.
B207 (White, 3 Pin)	Behind right kick panel.
B208 (Brown, 24 Pin)	Behind right kick panel.
B209 (White, 4 Pin)	Behind right kick panel.
B210 (Gray, 6 Pin)	Behind right kick panel.
B211 (SMJ)	Behind right kick panel.
B221 (White, 15 Pin)	At right "B" pillar.
B222 (Gray, 15 Pin)	At right "B" pillar.
B251 (Light Blue, 8 Pin)	At right side of trunk.
B261 (White, 12 Pin)	Behind right rear taillight.
B262 (Brown, 8 Pin)	Behind right rear taillight.
B263 (White, 10 Pin)	Behind right rear taillight.
B264 (White, 16 Pin)	Behind right rear taillight.
B265 (White, 2 Pin)	Behind right rear taillight.
B266 (White, 3 Pin)	Behind right rear taillight.
B268 (Yellow, 2 Pin)	Behind right rear taillight.
B401 (Light Blue, 8 Pin)	At right side of trunk.
B501 (White, 12 Pin)	Behind rear center console.
D1 (SMJ)	Behind left kick panel.
D31 (SMJ)	Behind right kick panel.
D51 (White, 30 Pin)	At left "B" pillar.
D71 (White, 30 Pin)	At right "B" pillar.
E32 (Light Blue, 8 Pin)	At right side of engine compartment.
E33 (Gray, 10 Pin)	At right side of engine compartment.
E34 (Green, 10 Pin)	At right side of engine compartment.
E35 (Gray, 9 Pin)	At right side of engine compartment.
E205 (SMJ)	Behind lower left side of dash.
E206 (Yellow, 4 Pin)	Behind lower left side of dash.
E211 (White, 20 Pin)	Behind left kick panel.
E212 (Brown, 6 Pin)	Behind left kick panel.
E222 (White, 24 Pin)	Behind right kick panel.
E223 (White, 12 Pin)	Behind right kick panel.
E224 (Brown, 6 Pin)	Behind right kick panel.
E225 (White, 20 Pin)	Behind right kick panel.
E305 (Gray, 9 Pin)	At right side of engine compartment.
E315 (Gray, 10 Pin)	At front of engine compartment.
F5 (Gray, 10 Pin)	At left front of engine compartment.
F21 (Green, 6 Pin)	On rear of engine.
F24 (Light Blue, 2 Pin)	On left rear of engine.
F32 (Light Blue, 8 Pin)	At right front of engine compartment.
F33 (Gray, 10 Pin)	At right front of engine compartment.
F34 (Green, 10 Pin)	At right front of engine compartment.
F40 (Dark Gray, 4 Pin)	On right rear of engine.
F41 (Green, 6 Pin)	On right side of engine.
F105 (SMJ)	Behind right kick panel.
F201 (Green, 6 Pin)	At left rear of engine.
F221 (Green, 6 Pin)	At rear of engine.
F241 (Blue, 4 Pin)	On right rear of engine.
F261 (Light Blue, 2 Pin)	On left rear of engine.
M4 (SMJ)	Behind left kick panel.
M5 (SMJ)	Behind left kick panel.
M6 (Gray, 24 Pin)	Behind left kick panel.
M7 (White, 24 Pin)	Behind left kick panel.
M11 (SMJ)	Behind left kick panel.
M15 (SMJ)	Behind lower left end of dash.
M16 (Yellow, 4 Pin)	Behind lower left end of dash.
M23 (White, 18 Pin)	Behind upper left end of dash.
M39 (White, 8 Pin)	Behind left side of dash.
M40 (White, 8 Pin)	Behind left side of dash.
M61 (White, 4 Pin)	Behind left side of dash.
M101 (White, 24 Pin)	Behind rear center console.
M111 (White, 6 Pin)	Behind upper center of dash.
M132 (White, 24 Pin)	Behind right kick panel.
M133 (White, 12 Pin)	Behind right kick panel.
M135 (SMJ)	Behind right kick panel.
M137 (White, 3 Pin)	Behind right kick panel.
M138 (Brown, 24 Pin)	Behind right kick panel.
M139 (White, 4 Pin)	Behind right kick panel.
M140 (Gray, 6 Pin)	Behind right kick panel.
M141 (SMJ)	Behind right kick panel.
M142 (SMJ)	Behind right kick panel.
M401 (White, 4 Pin)	Behind instrument cluster.
M411 (White, 6 Pin)	Behind upper center of dash.
R3 (White, 18 Pin)	Behind upper left end of dash.
R14 (White, 2 Pin)	At center of windshield headliner.
R15 (White, 2 Pin)	At center of windshield headliner.

Infiniti Q45 2003 - GROUNDS

Infiniti Q45 2003 GROUNDS LOCATION

Component	Component Location
B16	Under left front door sill.
B17	Under left front door sill.
B57	At center rear of vehicle. See Fig. 5 .
B216	Under right front door sill.
B217	Under right front door sill.
B256	At right front of trunk. See Fig. 5 .
B422	At base of right "C" pillar. See Fig. 5 .
E24	On right front strut tower. See Fig. 1 .
E42	On right front fenderwell, forward of engine room box. See Fig. 1 .
E44	On right front fenderwell, forward of engine room box. See Fig. 1 .
E59	At center front of engine compartment. See Fig. 1 .
E62	On left front fenderwell, near engine oil level gauge. See Fig. 1 .
E67	On left front strut tower. See Fig. 1 .
E307	At right front of engine compartment, near battery. See Fig. 1 .
F8	At left front of engine compartment, near engine oil level gauge. See Fig. 1 .
F9	At left front of engine compartment, near engine oil level gauge. See Fig. 1 .
M24	Behind left side of dash. See Fig. 3 .
M25	Behind left side of dash. See Fig. 3 .
M114	Behind right side of dash. See Fig. 3 .
M115	Behind right side of dash. See Fig. 3 .