No.4 INDICATOR LIGHT DOES NOT ILLUMINATE [PARKING SENSOR]

id0903z4886200

4
Indicator light does not illuminate
DESCRIPTION
•  Indicator light does not illuminate (buzzer activation normal) with the parking sensor on (initialize mode).
•  Indicator light does not illuminate even though detection conditions have been met.
POSSIBLE CAUSES
•  Indicator light malfunction
―  Open circuit in wiring harness between parking sensor switch terminal J and parking sensor control module terminal AB.
―  Short circuit in power supply wiring harness between parking sensor switch terminal J and parking sensor control module terminal AB.
―  Indicator light malfunction
•  Parking sensor control module malfunction.

Diagnostic Procedure

Step

Inspection

Action
1
DETERMINE IF MALFUNCTION CAUSE IS INDICATOR LIGHT ILLUMINATION CIRCUIT NOT MEETING ILLUMINATION CONDITIONS
•  Set up the vehicle according to the following conditions:
―  Switch the ignition to ON.
―  Turn the parking sensor on.
―  Release the parking brake.
•  Does the indicator light turn off after illuminating?
Yes
Go to Step 5.
No
Go to the next step.
2
INDICATOR LIGHT INSPECTION
•  Inspect the indicator light.
•  Is the indicator light normal?
Yes
Go to the next step.
No
Replace the parking sensor switch.
(See PARKING SENSOR SWITCH REMOVAL/INSTALLATION.)
3
INSPECT IF MALFUNCTION CAUSE IS OPEN CIRCUIT IN INDICATOR LIGHT ILLUMINATION CIRCUIT WIRING HARNESS
•  Switch the ignition to off.
•  Disconnect the parking sensor control module and parking sensor switch connectors.
•  Verify the continuity of the wiring harnesses between the parking sensor control module vehicle side wiring harness terminal AB and the parking sensor switch vehicle side wiring harness connector terminal J.
•  Is there continuity?
Yes
Go to the next step.
No
Repair for an open circuit in the wiring harness.
4
INSPECT IF MALFUNCTION CAUSE IS SHORT TO POWER SUPPLY WIRING HARNESS
•  Leave the parking sensor control module and parking sensor switch connectors disconnected.
•  Switch the ignition to ON.
•  Measure the voltage of connector terminal J on the parking sensor switch vehicle wiring harness side.
•  Is the voltage B+?
Yes
Repair for a short to the wiring harness power supply.
No
Replace the parking sensor control module.
(See PARKING SENSOR CONTROL MODULE REMOVAL/INSTALLATION.)
5
DETERMINE IF MALFUNCTION CAUSE IS PARKING BRAKE SIGNAL OR VEHICLE SPEED SIGNAL RELATED
•  Switch the ignition to ON.
•  Turn on the parking sensor switch.
•  Measure the voltage of parking sensor control module terminal AA.
•  Are the voltages normal?
Yes
Go to the next step.
No
•  If continuously 2 V or less, inspect and repair the following:
―  Parking brake switch (stuck on)
―  Wiring harness between parking brake switch and parking sensor control module terminal AA wiring harness (short to ground)
•  If continuously 5 V or more, inspect and repair the following:
―  Parking brake switch (stuck off)
―  Parking brake switch ground circuit (open circuit)
―  Wiring harness between parking brake switch and parking sensor control module terminal AA wiring harness (open circuit, short to power supply)
6
VERIFY IF MALFUNCTION CAUSE IS VEHICLE SPEED SIGNAL CIRCUIT WIRING HARNESS
•  Switch the ignition to ON.
•  Turn on the parking sensor switch.
•  Measure the voltage of parking sensor control module terminal Y.
•  Are the voltages normal?
Yes
Replace the parking sensor control module.
(See PARKING SENSOR CONTROL MODULE REMOVAL/INSTALLATION.)
No
Go to the next step.
7
DETERMINE IF MALFUNCTION CAUSE IS SPEEDOMETER RELATED
•  Verify the speedometer display.
•  Does the speedometer indicate the actual vehicle speed?
Yes
Repair for an open or short circuit to the wiring harness between parking sensor control module terminal Y and instrument cluster terminal 2O.
No
Go to the instrument cluster symptom troubleshooting procedure “NO. 7 SPEEDOMETER INDICATION IS DEFECTIVE [INSTRUMENT CLUSTER]”.