DTC 22 [HEADLIGHT AUTO LEVELING SYSTEM]

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Description

• Front auto leveling sensor signal

Detection Condition

• Front auto leveling sensor signal voltage is less than 0.4 V or 4.6 V or more

Possible Cause

• Open or short circuit between the front auto leveling sensor and the auto leveling control module
• Front auto leveling sensor malfunction
• Auto leveling control module malfunction

System Wiring Diagram

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Diagnostic Procedure

Step | Inspection | Action
--- | --- | ---
1 | VERIFY FRONT AUTO LEVELING SENSOR CONNECTOR CONNECTION • Is the front auto leveling sensor connector securely connected? | Yes | Go to the next step.
No | After securely connecting the connector, re-perform the DTC inspection. • If the malfunction recurs, go to the next step.
2 | INSPECT WIRING HARNESS BETWEEN FRONT AUTO LEVELING SENSOR AND AUTO LEVELING CONTROL MODULE • Turn the ignition switch to the OFF position. • Disconnect the negative battery cable. • Disconnect the front auto leveling sensor and auto leveling control module connectors. • Inspect the following the wiring harness between front auto leveling sensor connector terminal B and auto leveling control module connector terminal P for the following. ― Open circuit ― Short to power supply ― Short to body ground • Is the wiring harness normal? | Yes | Go to the next step.
No | Repair or replace the wiring harness between the front auto leveling sensor and the auto leveling control module. After replacement, perform the auto leveling system initial setting, and re-perform the DTC inspection. • If the malfunction recurs, go to the next step.
3 | INSPECT FRONT AUTO LEVELING SENSOR • Remove the front auto leveling sensor. (See FRONT AUTO LEVELING SENSOR REMOVAL/INSTALLATION.) • 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.) After replacement, perform the auto leveling system initial setting, and re-perform the DTC inspection. • If the malfunction recurs, go to the next step.
4 | PERFORM DTC INSPECTION • Install the front auto leveling sensor. • Connect all the connectors. • Connect the negative battery cable. • Perform the auto leveling system initial setting. (See AUTO LEVELING SYSTEM INITIALIZATION.) • Perform the headlight auto leveling system DTC inspection. (See DTC INSPECTION [HEADLIGHT AUTO LEVELING SYSTEM].) • Is DTC 22 indicated? | Yes | Replace the auto leveling control module. (See AUTO LEVELING CONTROL MODULE REMOVAL/INSTALLATION.)
No | DTC troubleshooting completed.