The Electronic Control Module (ECM) has detected an invalid combination of positions for the multi-position switches.
If the engine is equipped with an analog throttle position sensor then the signal from the idle validation switch is invalid.
System Response:
If equipped, the warning light will come on. The ECM will log the diagnostic code.
If a second throttle is installed, the engine will use the second throttle until the fault is repaired.
If a second throttle is not installed or if the second throttle has a fault, the following conditions will occur:
- The engine will default to the limp home speed.
- If the engine speed is higher than the limp home speed, the engine will decelerate to the limp home speed.
- If the engine speed is lower than the limp home speed, the engine speed will remain at the current speed.
- The engine will remain at this speed while the diagnostic code remains active.
- All inputs from the faulty throttle are ignored by the ECM until the fault is repaired.
- All inputs from the repaired throttle will be ignored by the ECM until the keyswitch has been turned to the OFF position and then back to the ON position.
Proceed to "Test Step 1" if the engine is equipped with a throttle switch.
Proceed to "Test Step 2" if the engine is equipped with an analog throttle position sensor.
Test Step 1. Perform the following diagnostic procedure: Throttle Switch Circuit - Test
Results:
- OK - STOP
Test Step 2. Perform the following diagnostic procedure: Analog Throttle Position Sensor Circuit - Test
Results:
- OK - STOP