DTC 3 [HEADLIGHT AUTO LEVELING SYSTEM]

id0902i7403100

DESCRIPTION

Rear auto leveling sensor circuit malfunction
DETECTION CONDITION
•  Rear auto leveling sensor signal voltage is less than 0.4 V or 4.6 V or more.
POSSIBLE CAUSE
•  Rear auto leveling sensor connector or terminals malfunction
•  Auto leveling control module connector or terminals malfunction
•  Short to ground in wiring harness between the following terminals:
―  Auto leveling control module terminal D—rear auto leveling sensor terminal A
―  Auto leveling control module terminal E—rear auto leveling sensor terminal B
―  Auto leveling control module terminal M—rear auto leveling sensor terminal C
•  Short to power supply in wiring harness between the following terminals:
―  Auto leveling control module terminal D—rear auto leveling sensor terminal A
―  Auto leveling control module terminal E—rear auto leveling sensor terminal B
―  Auto leveling control module terminal M—rear auto leveling sensor terminal C
•  Rear auto leveling sensor malfunction
•  Open circuit in wiring harness between the following terminals:
―  Auto leveling control module terminal D—rear auto leveling sensor terminal A
―  Auto leveling control module terminal E—rear auto leveling sensor terminal B
―  Auto leveling control module terminal M—rear auto leveling sensor terminal C
•  Auto leveling control module malfunction

Diagnostic Procedure

STEP

INSPECTION

ACTION
1
INSPECT REAR AUTO LEVELING SENSOR CONNECTOR AND TERMINALS
•  Switch the ignition to off.
•  Disconnect the negative battery cable.
•  Disconnect the rear auto leveling sensor connector.
•  Inspect the connector and terminals (corrosion, damage, pin disconnection).
•  Is there any malfunction?
Yes
Repair or replace the connector or terminals, then go to Step 7.
No
Go to the next step.
2
INSPECT AUTO LEVELING CONTROL MODULE CONNECTOR AND TERMINALS
•  Disconnect the auto leveling control module connector.
•  Inspect the connector and terminals (corrosion, damage, pin disconnection).
•  Is there any malfunction?
Yes
Repair or replace the connector or terminals, then go to Step 7.
No
Go to the next step.
3
INSPECT REAR AUTO LEVELING SENSOR CIRCUIT FOR SHORT TO GROUND
•  Rear auto leveling sensor and auto leveling control module connectors are disconnected.
•  Inspect for continuity between the following terminals (wiring harness-side) and body ground:
―  Rear auto leveling sensor terminal A
―  Rear auto leveling sensor terminal B
―  Rear auto leveling sensor terminal C
•  Is there continuity?
Yes
Repair or replace the wiring harness for a possible short to ground, then go to Step 7.
No
Go to the next step.
4
INSPECT REAR AUTO LEVELING SENSOR CIRCUIT FOR SHORT TO POWER SUPPLY
•  Rear auto leveling sensor and auto leveling control module connectors are disconnected.
•  Reconnect the negative battery cable.
•  Switch the ignition to ON.
•  Measure the voltage at the following terminals (wiring harness-side):
―  Rear auto leveling sensor terminal A
―  Rear auto leveling sensor terminal B
―  Rear auto leveling sensor terminal C
•  Is there any voltage?
Yes
Repair or replace the wiring harness for a possible short to power supply, then go to Step 7.
No
Go to the next step.
5
INSPECT REAR AUTO LEVELING SENSOR
•  Switch the ignition to off.
•  Inspect the rear auto leveling sensor.
•  Is there any malfunction?
Yes
Replace the rear auto leveling sensor, then go to Step 7.
(See AUTO LEVELING SENSOR REMOVAL/INSTALLATION.)
No
Go to the next step.
6
INSPECT REAR AUTO LEVELING SENSOR CIRCUIT FOR OPEN CIRCUIT
•  Rear auto leveling sensor and auto leveling control module connectors are disconnected.
•  Inspect for continuity between the following terminals (wiring harness-side):
―  Auto leveling control module terminal D—rear auto leveling sensor terminal A
―  Auto leveling control module terminal E—rear auto leveling sensor terminal B
―  Auto leveling control module terminal M—rear auto leveling sensor terminal C
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness for a possible open circuit, then go to the next step.
7
VERIFY TROUBLESHOOTING COMPLETED
•  Make sure to reconnect the disconnected connectors.
•  Reconnect the negative battery cable.
•  Switch the ignition to ON.
•  Perform the “DTC INSPECTION”.
•  Is the same DTC present?
Yes
Replace the auto leveling control module, then go to the next step.
(See AUTO LEVELING CONTROL MODULE REMOVAL/INSTALLATION.)
No
Go to the next step.
8
VERIFY THAT NO OTHER DTCs ARE PRESENT
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [HEADLIGHT AUTO LEVELING SYSTEM].)
No
DTC troubleshooting completed.