DTC 3 [HEADLIGHT AUTO LEVELING SYSTEM]SM2445956
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
• Turn the ignition switch to the LOCK position.
• 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.
• Turn the ignition switch to the ON position.
• 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
• Turn the ignition switch to the LOCK position.
• Disconnect the negative battery cable.
• Inspect the rear auto leveling sensor. (See REAR AUTO LEVELING SENSOR INSPECTION.)
• Is there any malfunction?
Yes
Replace the rear auto leveling sensor, then go to Step 7.
(See REAR 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.
• Turn the ignition switch to the ON position.
• Perform the “DTC INSPECTION”. (See DTC INSPECTION [HEADLIGHT AUTO LEVELING SYSTEM].)
• 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.