Signal Too Low - Permanent Fault

Checking Component And Wiring







Visually check accelerator pedal (AP) position sensor connector and terminals according to Checking wiring and terminals. Permanent faults (under Related Tests and Information)

Check cable between engine control module (ECM) #B17 (#B27) and accelerator pedal (AP) position sensor #5 for a short-circuit to ground according to Checking wiring and terminals. Permanent faults (under Related Tests and Information) and for open-circuits according to Checking wiring and terminals. Permanent faults (under Related Tests and Information).

Check cable between engine control module (ECM) #B9 (#B19) and accelerator pedal (AP) position sensor #6 for an open-circuit according to Checking wiring and terminals. Permanent faults (under Related Tests and Information).

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. Permanent faults (under Related Tests and Information).

Remedy as necessary.

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

Continue with Test (Verification - Permanent). Verification - Permanent