1.CHECK FUSE Check 10A fuse [No. 3, located in the fuse block (J/B)]. NOTE： Refer to Fuse, Connector and Terminal Arrangement. Is the inspection result normal? YES>>GO TO 2.
NO>>Replace the fuse after repairing the applicable circuit.
2.CHECK ECV POWER SUPPLY CIRCUIT

1. Turn the ignition switch OFF.
2. Disconnect the ECV connector.
3. Turn the ignition switch ON.
4. Check voltage between ECV harness connector and ground.

   (+) | (−) | Voltage
   ECV | —
   Connector | Terminal
   F36 | 2 | Ground | Battery voltage

Is the inspection result normal?
YES>>GO TO 3.
NO>>Repair the harnesses or connectors.
3.CHECK ECV CONTROL SIGNAL
With CONSULT-III

1. Turn the ignition switch OFF.
2. Connect the ECV connector.
3. Perform the “HVAC TEST”: MODE 5 of HVAC active test mode.
4. Check output waveform between the A/C auto amp. harness connector and ground with the oscilloscope.

   (+) | (−) | Condition | Output waveform
   A/C auto amp. | —
   Connector | Terminal
   M66 | 24 | Ground | HVAC TEST: MODE 5 | Duty ratio: approx. 50 %

Is the inspection result normal?
YES>>Replace the compressor.
NO>>GO TO 4.
4.CHECK CONTINUITY BETWEEN ECV AND A/C AUTO AMP.

1. Turn the ignition switch OFF.
2. Disconnect the ECV connector.
3. Disconnect the A/C auto amp. connector.
4. Check continuity between ECV harness connector and A/C auto amp. harness connector.

   ECV | A/C auto amp. | Continuity
   Connector | Terminal | Connector | Terminal
   F36 | 3 | M66 | 24 | Existed

Is the inspection result normal?
YES>>GO TO 5.
NO>>Repair the harnesses or connectors.
5.CHECK ECV
Check continuity between ECV connector terminals.

ECV | Continuity
Terminal | Terminal
2 | 3 | Existed

Is the inspection result normal?
YES>>Replace the A/C auto amp.
NO>>Replace the compressor.