Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSINFINITI2008FX45 AWD V8-4.5L (VK45DE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTTRANSMISSION CONTROL SYSTEMSTESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSDIAGNOSIS PROCEDURE
2008 Infiniti FX45 AWD V8-4.5L (VK45DE)
Diagnosis Procedure
2008 Infiniti FX45 AWD V8-4.5L (VK45DE)SECTION Diagnosis Procedure
Diagnosis Procedure
SYMPTOM 1:
^ Selector lever cannot be moved from "P" position with key in ON position and brake pedal applied.
^ Selector lever can be moved from "P" position with key in ON position and brake pedal released.
^ Selector lever can be moved from "P" position when key is removed from key cylinder.
SYMPTOM 2:
^ Ignition key cannot be removed when selector lever is set to "P" position.
^ Ignition key can be removed when selector lever is set to any position except "P" position.
1. CHECK KEY INTERLOCK CABLE
Check the key interlock cable for damage.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace key interlock cable.
2. CHECK SELECTOR LEVER POSITION
Check the selector lever position for damage.
OK or NG
OK >> GO TO 3.
NG >> Adjust A/T position. Refer to AT-207, "Adjustment of A/T Position". Adjustments
3. CHECK SHIFT LOCK SOLENOID AND PARK POSITION SWITCH
1. Connect A/T device harness connector.
2. Turn ignition switch ON.
3. Selector lever is set in "P" position.
4. Check operation.
OK or NG
OK >> INSPECTION END
NG >> GO TO 4.
4. CHECK POWER SOURCE
1. Turn ignition switch ON.
2. Check the voltage between A/T device harness connector M67 terminal 1 and ground.
OK or NG
OK >> GO TO 7.
NG >> GO TO 5.
5. CHECK STOP LAMP SWITCH
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch harness connector.
3. Check continuity between stop lamp switch harness connector E210 terminals 3 and 4.
Check stop lamp switch after adjusting brake pedal.
OK or NG
OK >> GO TO 6.
NG >> Repair or replace damaged parts.
6. DETECT MALFUNCTIONING ITEM
Check the following items. If any items are damaged, repair or replace damaged parts.
^ Harness for short or open between ignition switch and stop lamp switch harness connector E210 terminal 3.
^ Harness for short or open between stop lamp switch harness connector E210 terminal 4 and A/T device harness connector M67 terminal 1.
^ 10 A fuse [No. 12, located in the fuse block (J/B)].
^ Ignition switch
OK or NG
OK >> INSPECTION END
NG >> Repair or replace damaged parts.
7. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect A/T device harness connector.
3. Check continuity between A/T device harness connector M67 terminal 2 and ground.
Continuity should exist.
OK or NG
OK >> Replace shift lock solenoid and park position switch assembly.
NG >> Repair open circuit in harness or connectors.
SYMPTOM 1:
^ Selector lever cannot be moved from "P" position with key in ON position and brake pedal applied.
^ Selector lever can be moved from "P" position with key in ON position and brake pedal released.
^ Selector lever can be moved from "P" position when key is removed from key cylinder.
SYMPTOM 2:
^ Ignition key cannot be removed when selector lever is set to "P" position.
^ Ignition key can be removed when selector lever is set to any position except "P" position.
1. CHECK KEY INTERLOCK CABLE
Check the key interlock cable for damage.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace key interlock cable.
2. CHECK SELECTOR LEVER POSITION
Check the selector lever position for damage.
OK or NG
OK >> GO TO 3.
NG >> Adjust A/T position. Refer to AT-207, "Adjustment of A/T Position". Adjustments
3. CHECK SHIFT LOCK SOLENOID AND PARK POSITION SWITCH
1. Connect A/T device harness connector.
2. Turn ignition switch ON.
3. Selector lever is set in "P" position.
4. Check operation.
OK or NG
OK >> INSPECTION END
NG >> GO TO 4.
4. CHECK POWER SOURCE
1. Turn ignition switch ON.
2. Check the voltage between A/T device harness connector M67 terminal 1 and ground.
OK or NG
OK >> GO TO 7.
NG >> GO TO 5.
5. CHECK STOP LAMP SWITCH
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch harness connector.
3. Check continuity between stop lamp switch harness connector E210 terminals 3 and 4.
Check stop lamp switch after adjusting brake pedal.
OK or NG
OK >> GO TO 6.
NG >> Repair or replace damaged parts.
6. DETECT MALFUNCTIONING ITEM
Check the following items. If any items are damaged, repair or replace damaged parts.
^ Harness for short or open between ignition switch and stop lamp switch harness connector E210 terminal 3.
^ Harness for short or open between stop lamp switch harness connector E210 terminal 4 and A/T device harness connector M67 terminal 1.
^ 10 A fuse [No. 12, located in the fuse block (J/B)].
^ Ignition switch
OK or NG
OK >> INSPECTION END
NG >> Repair or replace damaged parts.
7. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect A/T device harness connector.
3. Check continuity between A/T device harness connector M67 terminal 2 and ground.
Continuity should exist.
OK or NG
OK >> Replace shift lock solenoid and park position switch assembly.
NG >> Repair open circuit in harness or connectors.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.