INDICATOR LIGHT DOES NOT ILLUMINATE [PARKING SENSOR]


id0903z4829600

Note
•  If there is any vehicle malfunction complaint lodged by a customer, perform FOREWORD [PARKING SENSOR] malfunction diagnosis according to the troubleshooting procedure.

Description

•  The parking sensor indicator does not illuminate (buzzer is normal) when the parking sensor switch/indicator is turned on.
•  The parking sensor indicator does not illuminate (buzzer is normal) even though the detection condition is met.

Possible malfunction

•  Parking sensor switch/indicator malfunction
―  Open circuit or short to ground in wiring harness between climate control unit terminal 1B and parking sensor control module terminal V
―  Open circuit or short to ground in wiring harness between climate control unit terminal 1A and parking sensor control module terminal S
―  Parking sensor switch/indicator malfunction (parking sensor switch/indicator stuck open )
•  Parking sensor switch/indicator malfunction
•  Parking sensor control module malfunction

Diagnostic Procedure

Step

Inspection

Action

1
INSPECT IF MALFUNCTION CAUSE IS OPEN CIRCUIT IN PARKING SENSOR SWITCH/INDICATOR SIGNAL WIRING HARNESS
•  Switch the ignition off (LOCK).
•  Disconnect the connectors of the climate control unit and parking sensor control module.
•  Inspect for continuity between the following wiring harnesses:
―  Climate control unit terminal 1B and parking sensor control module terminal V
―  Climate control unit terminal 1A and parking sensor control module terminal S
•  Is there continuity?
Yes
Go to the next step.
No
Repair for an open circuit in the wiring harness.
2
INSPECT IF MALFUNCTION CAUSE IS SHORT TO GROUND IN PARKING SENSOR SWITCH/INDICATOR SIGNAL WIRING HARNESS
•  Inspect for continuity between the following wiring harnesses:
―  Parking sensor control module terminal V and ground
―  Parking sensor control module terminal S and ground
•  Is there continuity?
Yes
Repair or replace the wiring harness.
No
Go to the next step.
3
INSPECT PARKING SENSOR SWITCH/INDICATOR
•  Reconnect all the disconnected connectors.
•  Switch the ignition ON (engine off or on).
•  Measure the voltages at parking sensor control module terminals S and V when the parking sensor switch is turned off (indicator turns off).
•  Is terminal S battery voltage and is terminal V approx. 5 V?
Yes
Replace the climate control unit.
Note
•  The parking sensor switch/indicator is integrated with the climate control unit.
No
Replace the parking sensor control module.