Signal Too Low - Intermittent Fault

Checking Wiring And Connectors







Check accelerator pedal (AP) position sensor connector for contact resistance and oxidation according to Checking wiring and terminals. Intermittent faults (under Related Tests and Information)

Check cable between engine control module (ECM) #B25 (#B35) and accelerator pedal (AP) position sensor #2 for an intermittent short-circuit to supply voltage according to Checking wiring and terminals. Intermittent faults (under Related Tests and Information).

Check cable between engine control module (ECM) #B25 (#B35) and accelerator pedal (AP) position sensor #2 for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults (under Related Tests and Information).

Check power supply cable accelerator pedal (AP) position sensor #1 and fuse (see wiring diagram) for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults (under Related Tests and Information) also check that the fuse has not blown.

Check ground lead between accelerator pedal (AP) position sensor #3 and ground terminal (see wiring diagram) for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults (under Related Tests and Information).

Remedy as necessary.

Other information
- To connect the 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.
- Accelerator pedal (AP) position sensor #2 is PWM signal, #2 is power supply (12 V) and #3 is the ground terminal.
- For information about signals on 5-cyl, see Signal specification.
- For information about signals on 6-cyl, see Signal Specification (under Diagnostic Parameters and Pinout Values).

Continue with Test (Fault-Tracing Information - Intermittent Fault). Fault-Tracing Information - Intermittent Fault
Continue: Refer to Trouble Code Descriptions. Diagnostic Trouble Code Descriptions