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 MANUALSINFINITI2002I35 V6-3.5L (VQ35DE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSINFORMATION BUSTESTING AND INSPECTIONCAN SYSTEM FOR VDC MODELSCIRCUIT CHECKSINSPECTION
2002 Infiniti I35 V6-3.5L (VQ35DE)
Inspection
2002 Infiniti I35 V6-3.5L (VQ35DE)SECTION Inspection
CAN Communication / For VDC Models
Proceed trouble diagnosis according to the check sheet results (example).
Case 1: Replace ECM.
Case 2: Replace VDC/TCS/ABS control unit.
Case 3: Replace TCM.
Case 4: Check harness between VDC/TCS/ABS control unit and steering wheel angle sensor. Refer to "CIRCUIT CHECK BETWEEN VDC/TCS/ABS CONTROL UNIT AND STEERING WHEEL ANGLE SENSOR".
...Circuit Check VDC/TCS/ABS and Steering Wheel Angle Sensor
Case 5: Check ECM circuit. Refer to "ECM CIRCUIT CHECK".
Case 6: Check TCM circuit. Refer to "TCM CIRCUIT CHECK".
Case 7: Check steering wheel angle sensor circuit. Refer to "STEERING WHEEL ANGLE SENSOR CIRCUIT CHECK".
...Steering Wheel Angle Sensor Circuit Check
Case 8: Check VDC/TCS/ABS control unit circuit. Refer to "VDC/TCS/ABS CONTROL UNIT CIRCUIT CHECK".
...VDC/TCS/ABS Control Unit Circuit Check
Case 9: Check CAN communication circuit. Refer to "CAN COMMUNICATION CIRCUIT CHECK".
...CAN Communication circuit Check
Proceed trouble diagnosis according to the check sheet results (example).
Case 1: Replace ECM.
Case 2: Replace VDC/TCS/ABS control unit.
Case 3: Replace TCM.
Case 4: Check harness between VDC/TCS/ABS control unit and steering wheel angle sensor. Refer to "CIRCUIT CHECK BETWEEN VDC/TCS/ABS CONTROL UNIT AND STEERING WHEEL ANGLE SENSOR".
...Circuit Check VDC/TCS/ABS and Steering Wheel Angle Sensor
Case 5: Check ECM circuit. Refer to "ECM CIRCUIT CHECK".
Case 6: Check TCM circuit. Refer to "TCM CIRCUIT CHECK".
Case 7: Check steering wheel angle sensor circuit. Refer to "STEERING WHEEL ANGLE SENSOR CIRCUIT CHECK".
...Steering Wheel Angle Sensor Circuit Check
Case 8: Check VDC/TCS/ABS control unit circuit. Refer to "VDC/TCS/ABS CONTROL UNIT CIRCUIT CHECK".
...VDC/TCS/ABS Control Unit Circuit Check
Case 9: Check CAN communication circuit. Refer to "CAN COMMUNICATION CIRCUIT CHECK".
...CAN Communication circuit Check
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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.