DTC 19, 22 (MULTIPLE DTCS INDICATED)


BHE070201038W20

DTC 19, 22

A/C amplifier (+5 V power supply) system inspection

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

1
• Disconnect the A/C amplifier connector (16-pin) and the airflow mode actuator connector.
• Is there an open circuit 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.
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
The system is normal at present. (Clear the past malfunction from memory.)