DTC 51

DTC 51 - Switch Condition Signal

*: Only vehicles with A/T:

CIRCUIT DESCRIPTION
Park/Neutral Position Switch Signal
The ECM uses the signals from the park/neutral position switch to determine whether the transmission is in park or neutral, or in some other gear.

Air Conditioning Switch Signal
The ECM uses the output from the air conditioning switch to determine whether or not the air conditioning is operating so that it can increase the idling speed of the engine if necessary.

Throttle Position Sensor IDL Signal
The IDL contacts are mounted in the throttle position sensor, and detects the idle condition.

WIRING DIAGRAM





INSPECTION PROCEDURE
NOTE: In this circuit, diagnosis can only be made in the test mode.