[23A] AUTOMATIC TRANSMISSION (FF) - - TROUBLESHOOTING <A/T> - SYMPTOM PROCEDURES - Inspection Procedure 16: Inhibitor switch system <4G69> | PRINT PAGE / INDEX / PRIOR / NEXT

Inspection Procedure 16: Inhibitor switch system <4G69>
OPERATION The inhibitor switch detects the selector lever position (P, R, N or D) which the driver has selected, and sends the information to the engine-A/T-ECU.
COMMENTS ON TROUBLE SYMPTOM The cause is probably a malfunction of the inhibitor switch, inhibitor switch circuit and engine-A/T-ECU.
Possible causes Malfunction of the inhibitor switch Damaged harness wires and connectors Malfunction of the engine-A/T-ECU
DIAGNOSIS
STEP 1. MUT-II/III data list Item 61: Inhibitor switch (Refer to data list reference table ). Q: Is the check result normal? YES: Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ). NO: Go to Step 2.
STEP 2. Check the inhibitor switch. Refer to . Q: Is the check result normal? YES: Go to Step 3. NO: Replace the inhibitor switch.
STEP3. Connector check: B-22 Inhibitor switch connector Check for the contact with terminals. Q: Is the check result normal? YES: Go to Step 4. NO: Repair the defective connector.
STEP 4. Measure the voltage at the B-22 inhibitor switch connector. Disconnect the connector, and measure the voltage between terminal 8 and earth at the wiring harness side. Turn the ignition switch to the ON position. OK: System voltage Q: Is the check result normal? YES: Go to Step 5. NO: Go to Step 8.
STEP 5. Connector check: C-136 Engine-A/T-ECU connector Check for the contact with terminals. Q: Is the check result normal? YES: Go to Step 6. NO: Repair the defective connector.
STEP 6. Check the harness between inhibitor switch connector B-22 terminal No.3, 7, 4, 1 and engine-A/T-ECU connector C-136 terminal No.66, 67, 75, 76. Check the output line for short-circuited or open circuit. Q: Is the check result normal? YES: Go to Step 7. NO: Repair the wiring harness.
STEP 7. MUT-II/III data list Item 61: Inhibitor switch (Refer to data list reference table ). Q: Is the check result normal? YES: Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ). NO: Replace the engine-A/T-ECU.
STEP 8. Connectors check: B-16X A/T control relay connector, C-16 J/C(1), C-106 intermediate connector Check for the contact with terminals. Q: Is the check result normal? YES: Go to Step 9. NO: Repair the defective connector.
STEP 9. Check the harness between inhibitor switch connector B-22 terminal No.8 and junction block connector C-202 terminal No.12. Check the power supply line for short or open circuit. Q: Is the check result normal? YES: Go to Step 7. NO: Repair the wiring harness.

[23A] AUTOMATIC TRANSMISSION (FF) - - TROUBLESHOOTING <A/T> - SYMPTOM PROCEDURES - Inspection Procedure 16: Inhibitor switch system <4G69> | PRINT PAGE / INDEX / PRIOR / NEXT

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