Signal Too Low - Intermittent Fault

ECM-9530 ACCELERATOR PEDAL (AP) POSITION SENSOR, FAULTY SIGNAL
SIGNAL TOO LOW - INTERMITTENT FAULT

Checking wiring and connectors



Check connector for intermittent contact resistance according to and intermittent loose connections according to Checking Wiring and Terminals. Intermittent Faults

Check cable between Engine Control Module (ECM) # B17 (# B27) and accelerator pedal (AP) position sensor # 5 for an intermittent short-circuit to ground according to Checking Wiring and Terminals. Intermittent Faults and for an intermittent open-circuit according to Checking Wiring and Terminals. Intermittent Faults

Check cable between Engine Control Module (ECM) # B9 (# B19) and accelerator pedal (AP) position sensor # 6 for an intermittent open-circuit according to Checking Wiring and Terminals. Intermittent Faults

Check cable between engine control module (ECM) # B5 (# B15) and accelerator pedal (AP) position sensor # 4 for an intermittent open-circuit according to Checking Wiring and Terminals. Intermittent Faults

Remedy as necessary

Other information:
- For connection of engine control module (ECM) breakout box, Connecting the Breakout Box (ECM)
- To access/replace the accelerator pedal (AP) position sensor, Accelerator Pedal Module, Replacing
- Accelerator pedal (AP) position sensor # 5 transmits an analog signal that varies between approximately 0.45V and approximately 4.5V depending on accelerator pedal (AP) position.
- Accelerator pedal (AP) position sensor # 6 is power supply (5V)
- Accelerator pedal (AP) position sensor # 4 is a signal ground.
- For information about signals, see Diagnostic Parameters and Pinout Values.


Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.