Inspection Procedure 18: Electric steering lock does not become locked (At power supply mode OFF).


COMMENTS ON TROUBLE SYMPTOM


The electric steering lock operates in accordance with a door switch signal, the P range detection switch signal, keyless entry function lock operation or door entry function lock operation. When the electric steering lock is not activated, a diagnosis code may be set in the KOS&OSS-ECU, the driver’s door switch circuit or the electric steering lock may be defective.

PROBABLE CAUSES



PROBABLE CAUSES


STEP 1. M.U.T.-III diagnosis code


Check if the diagnosis code is set in the KOS&OSS-ECU.

Q. Is the diagnosis code set?

Perform troubleshooting for the KOS&OSS-ECU (Refer to ).

Go to Step 2.

STEP 2. Check the keyless entry or the door entry function operation


Check that the keyless entry or the door entry function operation normally.

Q. Is the check result normal?

Go to Step 3.

Refer to trouble symptom chart .

STEP 3. M.U.T.-III other system data list


Check the ETACS-ECU service data relevant to the operation of keyless entry function.

1.Open the driver’s door or front passenger’s door.
Item No.
 Item name
 Normal condition
19
 Driver’s door switch
 ON
48
 Passenger’s door switch
 ON
2.Open the rear door (RH) after the all doors and tailgate close.
Item No.
 Item name
 Normal condition
49
 Rear door switch or tailgate latch switch
 ON
3.Open the rear door (LH) after the all doors and tailgate close.
Item No.
 Item name
 Normal condition
49
 Rear door switch or tailgate latch switch
 ON
4.Open the tailgate after the all doors and tailgate close.
Item No.
 Item name
 Normal condition
49
 Rear door switch or tailgate latch switch
 ON
OK: Normal conditions are displayed for all the items.

Q. Are the check result normal?

Go to Step 4.

Check the input signal for the ETACS-ECU (Refer to GROUP 54A - ETACS, Inspection Procedure 7 "One of the door switch signals is not received ").

STEP 4. Check of selector lever assembly (P range detection switch)


Disconnect the selector lever assembly connector, and check the continuity at the equipment side.
Operation state
 Terminal No.
 Normal conditions
Selector lever: P position
 4 - 6
 No continuity
Selector lever: Other than P position
 Continuity exists (2 Ω or less)

Q. Is the check result normal?

Go to Step 5.

Replace the selector lever assembly (Refer to GROUP 23A - Transmission Control ) .

STEP 5. Check of the troubles


Check if the electric steering lock becomes locked when the power supply mode is OFF.

Q. Is the check result normal?

Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).

Replace the electric steering lock and register the chassis number (Refer to ).