Diagnostic Trouble Code (DTC) Information ECM-9160

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) is diagnosed when the ignition is on.

Substitute Value 

The throttle angle is calculated using potentiometer 1 (circuit 1) in the throttle position (TP) sensor for the throttle unit. Diagnostic trouble code (DTC) ECM-9150 is also stored if the fault is also detected in potentiometer 1 (circuit 1). If both ECM-9160 and ECM-9150 are stored, the supply to the damper motor in the throttle unit will be shut off. The throttle will set itself to the return position.

Possible Source 

Signal too high 

• Contact resistance or oxidation in the terminals between the engine control module (ECM) and the electronic throttle unit
• Short-circuit to supply voltage in the signal cable
• Open-circuit in the signal ground cable for potentiometers 1 and 2
• Damaged throttle unit.

Signal too low 

• 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.

Faulty signal 

• Contact resistance or oxidation in the terminals between the engine control module (ECM) and the electronic throttle unit
• The signal cables are short-circuited to each other
• Damaged throttle unit.

Fault symptom[s] 

• Poor performance.