1.CHECK IN‐VEHICLE SENSOR POWER SUPPLY CIRCUIT

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

   (+) | (−) | Voltage (Approx.)
   In-vehicle sensor | —
   Connector | Terminal
   M61 | 1 | Ground | 5 V

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

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

   In-vehicle sensor | A/C auto amp. | Continuity
   Connector | Terminal | Connector | Terminal
   M61 | 2 | M66 | 37 | Existed

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

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

   In-vehicle sensor | A/C auto amp. | Continuity
   Connector | Terminal | Connector | Terminal
   M61 | 1 | M66 | 36 | Existed

4. Check for continuity between in-vehicle sensor harness connector and ground.

In-vehicle sensor | — | Continuity
Connector | Terminal
M61 | 1 | Ground | Not existed

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