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DTC 02, 18, 21 (MULTIPLE DTCS INDICATED)

BHE070201038W10

DTC 02, 18, 21 | A/C amplifier (+5 V power supply) system inspection
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POSSIBLE CAUSE | • Open or short circuit in wiring harnesses between A/C amplifier and solar radiation sensor, air mix actuator, or airflow mode actuator

Diagnostic Procedure

STEP | INSPECTION | ACTION
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1 | • Disconnect the A/C amplifier connector (16-pin) and the airflow mode actuator connector. • Is there continuity between A/C amplifier connector (16-pin) terminal 2O and airflow mode actuator connector terminal A? | Yes | Go to the next step.
No | Repair the wiring harness.
2 | • Is there a short circuit to ground in the wiring harness between A/C amplifier connector (16-pin) terminal 2O and airflow mode actuator connector terminal A? | Yes | Repair the wiring harness.
No | Go to the next step.
3 | • Is there a short circuit to ground in the wiring harness between A/C amplifier connector (16-pin) terminal 2O and air mix actuator connector terminal A? | Yes | Repair the wiring harness.
No | Go to the next step.
4 | • Is there a short circuit to ground in the wiring harness between A/C amplifier connector (16-pin) terminal 2O and solar radiation sensor connector terminal A? | Yes | Repair the wiring harness.
No | Inspect the connection at the A/C amplifier connector (16-pin). (See A/C AMPLIFIER INSPECTION [FULL-AUTO AIR CONDITIONER].)