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July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

DTC P0500: No Vehicle Speed Sensor Signal (4SP Auto Trans): Testing

NOTE: If any TCM speed sensor related DTCs are present, repair those DTCs before continuing with this test. See appropriate DIAGNOSIS article in AUTOMATIC TRANSMISSIONS.
    NOTE: Before continuing this test, use scan tool and check pinion factor. If pinion factor is not correct, reset and retest vehicle.
  1. Turn ignition on. Using scan tool, read DTCs. If Good Trip counter is displayed for DTC P0500 and displayed count is "0", go to next step. If Good Trip counter is not displayed for DTC P0500 or displayed count is not "0", go to step  7.
  2. Turn ignition off. Disconnect TCM connector. TCM is located behind left front fender and is mounted to frame rail. Turn ignition on. Measure voltage between ground and terminal No. 58 (Dark Blue/Orange wire) at TCM harness connector. If voltage is 6 volts or less, go to next step. If voltage is more than 6 volts, repair short to voltage in Dark Blue/Orange wire between TCM and PCM. PCM is located in left side of engine compartment, near front of battery.
  3. Turn ignition off. Connect a jumper wire to terminal No. 58 (Dark Blue/Orange wire) at TCM harness connector. Turn ignition on. Using scan tool, monitor VSS signal while momentarily touching remaining end of jumper wire to ground. If scan tool displays zero MPH, go to next step. If scan tool displays more than zero MPH, replace TCM. Reprogram pinion factor and perform shift quality quick learn procedure. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION.
  4. Turn ignition off. Disconnect PCM connectors. PCM is located in left side of engine compartment, near front of battery. Measure resistance between ground and terminal No. 66 (Dark Blue/Orange wire) at PCM C2 harness connector. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to voltage in Dark Blue/Orange wire.
  5. Measure resistance of Dark Blue/Orange wire between terminals No. 58 at TCM harness connector and No. 66 at PCM C2 harness connectors. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in Dark Blue/Orange wire.
  6. At this time, PCM is assumed to be defective. Replace PCM. Program the new PCM. See PROGRAMMING .
  7. At this time, conditions for DTC to set do not exist or fault is an intermittent problem. Start engine and allow it to idle. Ensure engine is at normal operating temperature. Using scan tool, monitor parameters related to DTC while wiggling connectors and wiring harness. If value changes while wiggling connectors and wiring harness, repair connectors and wiring harness where wiggling caused value to change. If value does not change, review Freeze Frame data using scan tool. Attempt to duplicate condition that caused DTC to set. Check for any related technical service bulletins that may apply. Visually inspect related connectors and wiring harness. Repair connectors and wiring harness as necessary. See WIRING DIAGRAMS article. If no problems are indicated, test is complete.
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