1.CHECK INTAKE SENSOR POWER SUPPLY CIRCUIT

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

   (+) | (−) | Voltage (Approx.)
   Intake sensor | —
   Connector | Terminal
   M77 | 1 | Ground | 5 V

Is the inspection result normal?
YES>>GO TO 2.
NO>>GO TO 4.
2.CHECK INTAKE SENSOR CIRCUIT CONTINUITY

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

   Intake sensor | A/C auto amp. | Continuity
   Connector | Terminal | Connector | Terminal
   M77 | 2 | M66 | 37 | Existed

Is the inspection result normal?
YES>>GO TO 3.
NO>>Repair the harnesses or connectors.
3.CHECK INTAKE SENSOR
Check the intake sensor components. Refer to Component Inspection.
Is the inspection result normal?
YES>>Replace the A/C auto amp.
NO>>Replace the intake sensor.
4.CHECK INTAKE SENSOR CIRCUIT CONTINUITY

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

   Intake sensor | A/C auto amp. | Continuity
   Connector | Terminal | Connector | Terminal
   M77 | 1 | M66 | 16 | Existed

4. Check for continuity between intake sensor harness connector and ground.

   Intake sensor | — | Continuity
   Connector | Terminal
   M77 | 1 | Ground | Not existed.

Is the inspection result normal?
YES>>Replace the A/C auto amp.
NO>>Repair the harnesses or connectors.