Door Key Lock / Unlock Switch Circuit: Procedure
WARNING: This page is about a different car, the 2011 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
- READ VALUE USING TECHSTREAM (DOOR KEY LOCK AND UNLOCK SWITCH)
- Connect Techstream to the DLC3.
- Turn the ignition switch on (IG).
- Turn the tester on.
- Enter the following menus: Body Electrical / Main Body / Data List.
- Read the Data List according to the display on the tester.MAIN BODY:
Tester Display Measurement Item/Range Normal Condition Diagnostic Note D Door Key SW-UL Door key lock and unlock switch signal (Driver) / ON or OFF ON: Door key is unlocked
OFF: Door key is locked- OK
On the tester screen, each item changes between ON and OFF according to the chart above.
NG → See step 2
OK → PROCEED TO PROBLEM SYMPTOMS TABLE NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
- INSPECT FRONT DOOR LOCK ASSEMBLY LH (DOOR KEY LOCK AND UNLOCK SWITCH)
- Remove the front door lock assembly LH.
- Measure the resistance of the switch when the switch is operated.
Resistance
Tester Connection Condition Specified Condition 10 - 7 ON
(Door lock set to UNLOCK)Below 1 Ω 9 - 7 OFF(
Door lock set to LOCK)Below 1 Ω
NG → REPLACE FRONT DOOR LOCK ASSEMBLY LH
OK: Go to next step
- CHECK WIRE HARNESS (FRONT DOOR LOCK ASSEMBLY LH - INSTRUMENT PANEL J/B)
- Disconnect the D8 and H9 connectors.
- Remove the body ECU from instrument panel J/B.
- Measure the resistance of the switch when the switch is operated.
Resistance
Tester Connection Condition Specified Condition 10 (L2) - H9-9 Always Below 1 Ω D8-8 (UL3) - H9-10 Always Below 1 Ω H9-7 - Body ground Always Below 1 Ω
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK → PROCEED TO PROBLEM SYMPTOMS TABLE NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE