DIAGNOSTIC PROCEDURE |
STEP 1. Check for short circuit in power supply line between the fusible link and the A/T control relay connector. |
Q.
Is the check result normal?
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Go to Step 2. |
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Repair the connector(s) or wiring harness. |
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STEP 2. Check for short circuit in VIG1, VIG2 line between the A/T control relay connector and the A/T-ECU connector. |
Q.
Is the check result normal?
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Go to Step 3. |
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Repair the connector(s) or wiring harness. |
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STEP 3. Check for open circuit in GND1, GND2 line between the A/T-ECU connector and earth. |
Q.
Is the check result normal?
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Go to Step 4. |
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Repair the connector(s) or wiring harness. |
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STEP 4. Retest the system. |
Recheck the trouble symptom. |
Q.
Does the malfunction take place again?
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Replace A/T-ECU. |
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Intermittent malfunction. |
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