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NO.1 AUTO LEVELING DOES NOT ADJUST OPTICAL AXIS OF THE HEADLIGHTS FOR VEHICLE POSTURE

id0903d0899700

1 | Auto leveling does not adjust optical axis of the headlights for vehicle posture
POSSIBLE CAUSE | • Headlight auto leveling actuator the malfunction • Auto leveling control module (main and/or sub) the malfunction • Front auto leveling sensor malfunction • Rear auto leveling sensor malfunction • Improper installation of front auto leveling sensor • Improper installation of rear auto leveling sensor • Open or short circuit in wiring harness between front combination light (LH and RH) • Poor connection or damaged pin at connection between front combination light (LH) and auto leveling control module (main) • Poor connection or damaged pin at connection between front combination light (RH) and auto leveling control module (sub) • Open or short circuit in wiring harness between ABS/TCS HU/CM terminal V and front combination light (LH) terminal 1E (with ABS/TCS) • Open or short circuit in wiring harness between DSC HU/CM terminal AE and front combination light (LH) terminal 1E (with DSC) • Short circuit in wiring harness between ABS/TCS HU/CM terminal V and BCM terminal 9B

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | RETRIEVE DTC FOR HEADLIGHT AUTO LEVELING SYSTEM • Connect the WDS or equivalent to DLC-2. • Tern the ignition switch to ON position (engine off). • Retrieve the DTCs for headlight auto leveling system. (See FOREWORD [HEADLIGHT AUTO LEVELING SYSTEM].) • Is there any DTC displayed? | Yes | Perform the appropriate DTC troubleshooting procedure. (See DTC TABLE [HEADLIGHT AUTO LEVELING SYSTEM].)
No | Go to the next step.
2 | INSPECT IF MALFUNCTION IS IN AUTO LEVELING SENSOR OR ELSEWHERE • Is the malfunction appears both side? | Yes | Go to Step 8.
No | If headlight auto leveling (RH) function does not operate, go to the next step. If headlight auto leveling (LH) function does not operate, go to Step 6.
3 | INSPECT COMBINATION LIGHT (RH) CONNECTOR FOR POOR CONNECTION • Inspect for poor connection (such as damaged/pulled-out pins, and corrosion) at connection between front combination light (RH) and auto leveling control module (sub). • Is the connection normal? | Yes | Go to the next step.
No | Repair or replace malfunctioning part.
4 | INSPECT IF MALFUNCTION IS IN COMMUNICATION LINE FOR HEAD LIGHT CONTROL MODULES OR ELSEWHERE • Inspect for open or short circuit in following wiring harnesses between front combination light (LH and RH) terminal. - Front combination light (LH) terminal 1F-front combination light (RH) terminal 1F - Front combination light (LH) terminal 1H- front combination light (RH) terminal 1H • Are the harnesses normal? | Yes | Go to the next step.
No | Repair or replace malfunctioning part.
5 | INSPECT IF MALFUNCTION IS IN HEADLIGHT AUTO LEVELING ACTUATOR OR ELSEWHERE • Replace the front combination light (RH). (See FRONT COMBINATION LIGHT REMOVAL/INSTALLATION.) • Verify that the headlight auto leveling (RH) function. • Does the headlight auto leveling (RH) function normal? | Yes | Troubleshooting completed. (Malfunction is in headlight auto leveling actuator.)
No | Replace the auto leveling control module (sub). Note • The auto leveling control module (sub) is integrated with the discharge headlight control module (RH). (See DISCHARGE HEADLIGHT CONTROL MODULE REMOVAL/INSTALLATION.)
6 | INSPECT FRONT COMBINATION LIGHT (LH) CONNECTOR FOR POOR CONNECTION • Inspect for poor connection (such as damaged/pulled-out pins, and corrosion) at connection between front combination light (LH) and auto leveling control module (main). • Is the connection normal? | Yes | Go to the next step.
No | Repair or replace malfunctioning part.
7 | INSPECT IF MALFUNCTION IS IN HEADLIGHT AUTO LEVELING ACTUATOR OR ELSEWHERE • Replace the front combination light (LH). (See FRONT COMBINATION LIGHT REMOVAL/INSTALLATION.) • Verify that the headlight auto leveling (LH) function. • Does the headlight auto leveling (LH) function normal? | Yes | Troubleshooting completed. (Malfunction is in headlight auto leveling actuator.)
No | Replace the auto leveling control module (main). Note • The auto leveling control module (main) is integrated with the discharge headlight control module (LH). (See DISCHARGE HEADLIGHT CONTROL MODULE REMOVAL/INSTALLATION.)
8 | INSPECT AUTO LEVELING SENSOR INSTALLATION • Inspect front and rear auto leveling sensor installation (bend or damaged of bracket, or dislocated link). • Are the front and rear auto leveling sensor installation properly? | Yes | Go to the next step.
No | Repair or replace malfunctioning part, or install properly.
9 | INSPECT IF MALFUNCTION IS IN FRONT AND REAR AUTO LEVELING SENSOR RELATED CIRCUIT OR ELSEWHERE • Inspect for open or short circuit in following wiring harnesses: - Front auto leveling sensor terminal A- front combination light (LH) terminal 2B - Front auto leveling sensor terminal B- front combination light (LH) terminal 2C - Front auto leveling sensor terminal D- front combination light (LH) terminal 2A - Rear auto leveling sensor terminal A- front combination light (LH) terminal 2B - Rear auto leveling sensor terminal B- front combination light (LH) terminal 2D - Rear auto leveling sensor terminal D- front combination light (LH) terminal 2A • Are the harnesses normal? | Yes | Go to the next step.
No | Repair or replace malfunctioning part.
10 | INSPECT FRONT AUTO LEVELING SENSOR • Inspect the front auto leveling sensor. (See FRONT AUTO LEVELING SENSOR INSPECTION.) • Is the front auto leveling sensor normal? | Yes | Go to the next step.
No | Replace the front auto leveling sensor. (See FRONT AUTO LEVELING SENSOR REMOVAL/INSTALLATION.)
11 | INSPECT REAR AUTO LEVELING SENSOR • Inspect the rear auto leveling sensor. (See REAR AUTO LEVELING SENSOR INSPECTION [2WD].) (See REAR AUTO LEVELING SENSOR INSPECTION [4WD].) • Is the rear auto leveling sensor normal? | Yes | Go to the next step.
No | Replace the rear auto leveling sensor. (See REAR AUTO LEVELING SENSOR REMOVAL/INSTALLATION [2WD].) (See REAR AUTO LEVELING SENSOR REMOVAL/INSTALLATION [4WD].)
12 | INSPECT IF MALFUNCTION IS IN VEHICLE SPEED RELATED SIGNAL CIRCUIT OR ELSEWHERE • Inspect for following wiring harnesses: - Open or short circuit in wiring between front combination light (LH) terminal 1E and ABS/TCS HU/CM terminal V (with ABS/TCS) - Open or short circuit in wiring between front combination light (LH) terminal 1E and DSC HU/CM terminal AE (with DSC) - Short to GND or power supply circuit in wiring between front combination light (LH) terminal 1E and BCM terminal 9B • Are the harnesses normal? | Yes | Replace the auto leveling control module (main). (See DISCHARGE HEADLIGHT CONTROL MODULE REMOVAL/INSTALLATION.)
No | Repair or replace malfunctioning part.