Inspection Procedure 16: Inhibitor switch system





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.

DIAGNOSIS CODE SET CONDITIONS


If the inhibitor switch has not been sending any signal for at least 30 seconds, an open circuit may be present and diagnosis code No.27 will be set.
PROBABLE CAUSES

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III data list
Item 61: Inhibitor switch (Refer to data list reference table ).

Q. Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
NO <none of the selector lever positions are displayed on M.U.T.-III> : Go to Step 2.
NO <only one of the selector lever positions is not displayed on M.U.T.-III> : Go to Step 6.

STEP 2. Check the inhibitor switch.
Refer to .

Q. Is the check result normal?
Go to Step 3.
Replace the inhibitor switch.

STEP 3. Connector check: B-111 Inhibitor switch connector, C-203 J/B connector, C-18 intermediate connector, C-116 J/C (4), C-33 J/C (7) <RHD>






Check for the contact with terminals.

Q. Is the check result normal?

Go to Step 4.

Repair the defective connector.

STEP 4. Check the harness between inhibitor switch connector B-111 terminal No.8 and J/B connector C-203 terminal No.12.



Check the power supply line for open circuit.

Q. Is the check result normal?

Go to Step 5.

Repair the wiring harness.

STEP 5. M.U.T.-III data list
Item 61: Inhibitor switch (Refer to data list reference table ).

Q. Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
Replace the engine-A/T-ECU.

STEP 6. Check the inhibitor switch.
Refer to .

Q. Is the check result normal?
Go to Step 7.
Replace the inhibitor switch.

STEP 7. Connector check: B-111 inhibitor switch connector, C-112 engine-A/T-ECU connector


Check for the contact with terminals.

Q. Is the check result normal?

Go to Step 8.

Repair the defective connector.

STEP 8. Check the harness between inhibitor switch connector B-111 terminal No.3, 7, 4, 1 and engine-A/T-ECU connector C-112 terminal No.66, 67, 75, 76.


Check the output line for open circuit.

Q. Is the check result normal?

Go to Step 9.

Repair the wiring harness.

STEP 9. Connector check: C-121 shift switch assembly connector, C-17 intermediate connector




Check for the contact with terminals.

Q. Is the check result normal?

Go to Step 10.

Repair the defective connector.

STEP 10. Check the harness between inhibitor switch connector B-111 terminal No.1 and shift switch assembly connector C-121 terminal No.1.



Check the output line for short circuit.

Q. Is the check result normal?

Go to Step 5.

Repair the wiring harness.