Diagnostic trouble code (DTC) information

Condition 

Diagnostic trouble code (DTC) ECM-9150 is stored if the engine control module (ECM) registers a fault in the signal from the throttle position sensor (TP) for the throttle unit, potentiometer 1 (circuit 1) when the ignition is switched on

Substitute Value 

The throttle angle is calculated using potentiometer 2 (circuit 2) in the throttle position (TP) sensor for the throttle unit. If diagnostic trouble codes (DTCs) ECM-9150 and ECM-9160 are stored at the same time, the supply to the damper motor in the throttle unit will be cut. 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 throttle unit
• Open-circuit or short-circuit to supply voltage in the signal cable
• Open-circuit in the signal ground cable for potentiometers 1 and 2
• Defective throttle unit.

Signal too low: 

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

Faulty signal: 

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

Fault symptom[s] 

• Poor performance.