Signal Too High - Intermittent Fault

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

Checking wiring and connectors



Check the signal cable between engine control module (ECM) # B17 (# B27) and accelerator pedal (AP) position sensor # 2 for an intermittent short-circuit to supply voltage according to [1][2]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. Signal Description, ME7, B5XX4T


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