Inspection Procedure
- READ VALUE OF HAND-HELD TESTER
- Connect the hand-held tester (with CAN VIM) to the DLC3.
- Turn the ignition switch ON and push the hand-held tester main switch ON.
- Select the item below in the DATA LIST and read the displays on the hand-held tester.
Rear LH seat ECU:
REAR LH SEAT ECU - DATA LISTItem Measurement Item/ Display (Range) Normal Condition HDRST LIMIT SW Rear headrest limit switch signal/ ON or OFF ON: Rear headrest limit switch is ON OFF: Rear headrest limit switch is OFF OK:
On the tester screen, each item should change between ON and OFF according to the above chart.
NG: Go to step 2
OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE
- INSPECT HEADREST LIMIT SWITCH REAR LH
- Remove the headrest limit switch.
- Measure the resistance of the switch.
Standard:
TESTER CONNECTION AND SPECIFIED CONDITIONTester Connection Switch Condition Specified Condition 1 - 2 Not pushed (A) 10 kΩ or higher 1 - 2 Pushed (B) Below 1 Ω NG: REPLACE HEADREST LIMIT SWITCH REAR LH
OK: Go to next step
- CHECK WIRE HARNESS (HEADREST LIMIT SWITCH REAR LH - REAR LH SEAT ECU AND BODY GROUND)
- Disconnect the H24 switch connector.
- Disconnect the R25 ECU connector.
- Measure the resistance of the wire harness side connectors.
Standard:
TESTER CONNECTION AND SPECIFIED CONDITIONTester Connection Specified Condition H24-2 - R25-20 (HRSW) Below 1 Ω H24-1 - Body ground Below 1 Ω Fig 2: Identifying H24 Headrest Limit Switch Rear LH Connector Terminals And R25 Rear LH Seat ECU Connector TerminalsCourtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE