1. Disconnect the negative battery cable..
2. Remove the front under cover No.2..
3. Remove the back-up light switch..
4. Verify that the continuity between the back-up light switch terminals is as indicated in the table.


If not as indicated in the table, replace the back-up light switch.
Auto Light Sensor
Back Up Light Switch Removal/Installation [C66 M R]Camshaft Position (CMP) Sensor
Purpose/Function
Detects the camshaft speed as basic information for mainly determining the
fuel injection timing and ignition timing.
Detects the camshaft speed and inputs it to the PCM as a CMP signal.
Construction
Intake CMP sensor
Installed on the cylinder head.
...
Crankshaft Position (CKP) Sensor
Purpose/Function
Detects the crankshaft speed as basic information for mainly determining
the fuel injection timing and ignition timing.
Detects the crankshaft speed and inputs it to the PCM as a CKP signal.
Construction
Installed on the side of the cylinder block (ri ...
Airflow Mode Actuator [Full Auto Air Conditioner]
Purpose
The airflow mode actuator moves the mode door in the A/C unit to switch the
air vent.
Function
Door open/close function
The airflow mode actuator drives the motor based on the signal from the climate
control unit and moves the mode door to the VENT, BI-LEVEL, HEAT, ...