Vehicle Speed Signal Circuit

VEHICLE SPEED SIGNAL CIRCUIT





Description
Transmits vehicle speed signal to rear seatback power return control unit.




Component Function Check
1.CHECK FUNCTION
Check that the rear seatback rises when pressing and holding the power return switch or rear seatback switch in UP direction.
Is the inspection result normal?
YES - Vehicle speed signal circuit is OK.
NO - SEE Diagnosis Procedure.




Diagnosis Procedure
1.CHECK VEHICLE SPEED OPERATION
1. Check speed meter operate normally.
Is the inspection result normal?
YES - GO TO 2.
NO - Work Flow.
2.CHECK VEHICLE SPEED INPUT SIGNAL
Check voltage between rear seatback power return control unit harness connector and ground.





Is the inspection result normal?
YES - GO TO 3.
NO - Work Flow.
3.CHECK VEHICLE SPEED SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear seatback power return control unit connector and unified meter and A/C amp. connector.
3. Check continuity between power return control unit harness connector and unified meter and A/C amp. harness connector.





4. Check continuity between rear seatback power return control unit harness connector and ground.





Is the inspection result normal?
YES - GO TO 4.
NO - Repair or replace harness.
4.CHECK INTERMITTENT INCIDENT
Intermittent Incident.
- INSPECTION END