DTC 02, 18, 21

id070200811900

DTC 02, 18, 21

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

POSSIBLE CAUSE

•  Open circuit in wiring harness between A/C amplifier connector terminal 2P and airflow mode actuator connector terminal A

•  Short to ground in wiring harness between A/C amplifier connector terminal 2P and airflow mode actuator connector terminal A

•  Short to ground in wiring harness between A/C amplifier connector terminal 2P and air mix actuator connector terminal C (L.H.D.), A (R.H.D.)

•  Short to ground in wiring harness between A/C amplifier connector terminal 2P and solar radiation sensor connector terminal A

•  Connector or terminal malfunction

DTC 02, 18, 21	A/C amplifier (+5 V power supply) system inspection
POSSIBLE CAUSE	• Open circuit in wiring harness between A/C amplifier connector terminal 2P and airflow mode actuator connector terminal A • Short to ground in wiring harness between A/C amplifier connector terminal 2P and airflow mode actuator connector terminal A • Short to ground in wiring harness between A/C amplifier connector terminal 2P and air mix actuator connector terminal C (L.H.D.), A (R.H.D.) • Short to ground in wiring harness between A/C amplifier connector terminal 2P and solar radiation sensor connector terminal A • Connector or terminal malfunction

Diagnostic Procedure

STEP	INSPECTION		ACTION
1	INSPECT +5 V POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT • 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 2P and airflow mode actuator connector terminal A?	Yes	Go to the next step.
1		No	Repair the wiring harness.
2	INSPECT +5 V POWER SUPPLY CIRCUIT FOR SHORT TO GROUND • Is there a short circuit to ground in the wiring harness between A/C amplifier connector (16-pin) terminal 2P and airflow mode actuator connector terminal A?	Yes	Repair the wiring harness.
2		No	Go to the next step.
3	INSPECT +5 V POWER SUPPLY CIRCUIT FOR SHORT TO GROUND • Is there a short circuit to ground in the wiring harness between A/C amplifier connector (16-pin) terminal 2P and air mix actuator connector terminal C (L.H.D.), A (R.H.D.)?	Yes	Repair the wiring harness.
3		No	Go to the next step.
4	INSPECT +5 V POWER SUPPLY CIRCUIT FOR SHORT TO GROUND • Is there a short circuit to ground in the wiring harness between A/C amplifier connector (16-pin) terminal 2P and solar radiation sensor connector terminal A?	Yes	Repair the wiring harness.
4		No	Inspect the connection at the A/C amplifier connector (16-pin).