DH18 - Check TP Harness to PCM For Intermittent Opens or Shorts

- Key Off.

- Disconnect PCM. Inspect for damaged or pushed out pins, corrosion, loose wires, etc. Service as necessary.

- Install breakout box, reconnect PCM.

- Key On, Engine Off.

- Connect DVOM between Test Pin 89 (TP SIG) and Test Pin 91 (SIG RTN) at the breakout box.

- While viewing DVOM, do the following:
- Grasp the vehicle harness closest to the TP sensor connector.
- Shake and bend a small section of the harness all the way to the dash panel.
- Wiggle. shake and bend the harness from the dash panel to the PCM.

- Is the voltage changing below the minimum 0.49 volts or above the maximum 4.60 volts?

YES -- ISOLATE fault and SERVICE as necessary. RECONNECT all components. Complete PCM reset to clear DTCs. Clearing Diagnostic Trouble Codes

Rerun quick test. Diagnostic Subroutines (DSR) - Extracting Codes

NO -- Unable to duplicate and/or identify fault at this time. Go to Pinpoint Test Step Z1 with the following data: TP PID and list of Possible Causes. Z1 - Intermittent Test Procedure