Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-922D

Condition




The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers a fault in the signal from the throttle position (TP) sensor, potentiometer 2 (circuit 2) in the electronic throttle unit.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.

Substitute value
The throttle angle is calculated using potentiometer 1 (circuit 1) in the throttle position (TP) sensor for the throttle unit. If a fault is also detected in potentiometer 1 (circuit 1) a diagnostic trouble code (DTC) will also be stored for this. If diagnostic trouble codes (DTCs) have been stored for both potentiometers, the supply to the damper motor for the electronic throttle unit will be disabled. The throttle will set itself to the return position.

Possible source
- Contact resistance or oxidation in the terminals between the engine control module (ECM) and the electronic throttle unit
- Open-circuit or short-circuit to ground in the signal cable
- Open-circuit or short-circuit to ground in the power supply to potentiometers 1 and 2
- Damaged throttle unit.

Fault symptom[s]
- Poor performance.