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 MANUALSINFINITI2003I35 V6-3.5L (VQ35DE)REPAIR AND DIAGNOSISBRAKES AND TRACTION CONTROLANTILOCK BRAKES / TRACTION CONTROL SYSTEMSTESTING AND INSPECTIONINITIAL INSPECTION AND DIAGNOSTIC OVERVIEWABS/TCS/VDCDESCRIPTION OF ON-BOARD DIAGNOSTICSFAIL SAFE SYSTEM
2003 Infiniti I35 V6-3.5L (VQ35DE)
Fail Safe System
2003 Infiniti I35 V6-3.5L (VQ35DE)SECTION Fail Safe System
Fail-safe
ABS SYSTEM
If a malfunction occurs in the electrical system, the ABS warning lamp, VDC OFF indicator lamp, and SLIP indicator lamp in the meter will turn ON. In this condition, the VDC/TCS/ABS and EBD become one of the following conditions by the fail-safe function.
1. Only EBD operates. The same condition as that of models without VDC/TCS/ABS
2. VDC/TCS/ABS and EBD do not operate. Only normal brake operates on 4 wheels.
NOTE: In the step 1 shown above, the self-diagnosis is carried out at the ignition switch is turned ON and when the vehicle initial starts. ABS self-diagnosis noise may be heard as usual.
VDC/TCS SYSTEM
If a malfunction occurs in the electrical system, the VDC OFF indicator lamp and SLIP indicator lamp in the meter turn on. In this condition, VDC/TCS will be deactivated and it becomes equal to that of models without VDC/TCS. However, ABS is controlled normally.
If a malfunction occurs in the throttle control system, VDC/TCS control does not operate. Only ABS control operates normally.
CAUTION: If the fail-safe function operates, carry out the self-diagnosis for VDC/TCS/ABS control system.
ABS SYSTEM
If a malfunction occurs in the electrical system, the ABS warning lamp, VDC OFF indicator lamp, and SLIP indicator lamp in the meter will turn ON. In this condition, the VDC/TCS/ABS and EBD become one of the following conditions by the fail-safe function.
1. Only EBD operates. The same condition as that of models without VDC/TCS/ABS
2. VDC/TCS/ABS and EBD do not operate. Only normal brake operates on 4 wheels.
NOTE: In the step 1 shown above, the self-diagnosis is carried out at the ignition switch is turned ON and when the vehicle initial starts. ABS self-diagnosis noise may be heard as usual.
VDC/TCS SYSTEM
If a malfunction occurs in the electrical system, the VDC OFF indicator lamp and SLIP indicator lamp in the meter turn on. In this condition, VDC/TCS will be deactivated and it becomes equal to that of models without VDC/TCS. However, ABS is controlled normally.
If a malfunction occurs in the throttle control system, VDC/TCS control does not operate. Only ABS control operates normally.
CAUTION: If the fail-safe function operates, carry out the self-diagnosis for VDC/TCS/ABS control system.
RENDER: 1.0x
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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.