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.
Diagnosis Procedure
Regarding Wiring Diagram information, refer to WIRING DIAGRAM .
- CHECK STEERING WHEEL AUDIO CONTROL SWITCH RESISTANCE
- Turn ignition switch OFF.
- Disconnect combination switch connector M90.
- Check resistance between the terminals of combination switch connector M90.
Combination switch connector M90 Condition Resistance Ω
(Approx.)Terminal Terminal 25 19 Depress SOURCE switch. 1 Depress switch.
121 Depress switch.
321 Depress switch.
723 Depress ENTER switch. 2023 18 Depress switch.
1 Depress switch.
121 Depress switch.
321 Depress switch.
723 Depress DISPLAY switch. 2023 Is the inspection result normal?
YES
GO TO STEP 2 .
NO
Replace steering switches. Refer to REMOVAL AND INSTALLATION .
- CHECK HARNESS BETWEEN COMBINATION METER AND COMBINATION SWITCH
- Disconnect combination meter connector M76 and combination switch connector M30.
- Check continuity between combination meter connector M76 and combination switch connector M30.
Combination meter Combination switch Continuity Connector Terminal Connector Terminal M76 22 M30 8 Yes 23 15 21 14 - Check continuity between combination meter connector M76 and ground.
Combination meter Ground Continuity Connector Terminal M76 22 - No 23 21
Is the inspection result normal?
YES
GO TO STEP 3 .
NO
Repair or replace harness or connectors.
- CHECK COMBINATION SWITCH
Check continuity between combination switch connectors M90 and M30.
Combination switch Continuity Connector Terminal Connector Terminal M90 25 M30 8 Yes 18 15 19 14 Is the inspection result normal?
YES
GO TO STEP 4 .
NO
Replace spiral cable. Refer to REMOVAL AND INSTALLATION .
- CHECK HARNESS BETWEEN COMBINATION METER AND AV CONTROL UNIT
- Disconnect combination meter connector M77 and AV control unit connector M102.
- Check continuity between combination meter connector M77 and AV control unit connector M102.
Combination meter AV control unit Continuity Connector Terminal Connector Terminal M77 47 M102 31 Yes 48 32 - Check continuity between combination meter connector M77 and ground.
Combination meter Ground Continuity Connector Terminal M77 47 - No 48
Is the inspection result normal?
YES
Replace AV control unit. Refer to REMOVAL AND INSTALLATION .
NO
Repair or replace harness or connectors.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.