DTC P0500: No Vehicle Speed Signal: Testing
- Turn ignition on. Using scan tool, read DTCs. If GLOBAL GOOD TRIP counter is displayed and displayed count is "0", go to next step. If GLOBAL GOOD TRIP counter is not displayed or displayed count is not "0", go to step 7.
- Turn ignition off. Disconnect TCM connector. TCM is located on left side of engine compartment, near Power Distribution Center. See Figure. Turn ignition on. Measure voltage between ground and terminal No. 58 (White/Orange wire) at TCM harness connector. See Fig 1. If voltage is 6 volts or less, go to next step. If voltage is more than 6 volts, repair short to voltage in White/Orange wire between PCM and TCM.
- Turn ignition off. Connect one end of a jumper wire to terminal No. 58 (White/Orange wire) at TCM harness connector. Turn ignition on. Using scan tool, read PCM Vehicle Speed Sensor (VSS) signal. While observing scan tool, rapidly tap other end of jumper wire to ground. If VSS signal is not more than zero MPH, go to next step. If VSS signal is more than zero MPH, replace TCM. Perform transaxle quick learn and pinion factor procedures. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION.
- Turn ignition off. Disconnect PCM connectors. PCM is located on left side of engine compartment, between PDC and TCM. See Figure. Measure resistance of White/Orange wire between terminals No. 66 at PCM C2 harness connector and No. 58 at TCM harness connector. See Figure and Fig 1
. If resistance is 5 ohms or less, go to next step. If resistance is more than 5 ohms, repair open in White/Orange wire.
- Measure resistance between ground and terminal No. 66 (White/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 ground in White/Orange wire between PCM and TCM.
- At this time, PCM is assumed to be defective. Replace PCM.
- Visually inspect related connectors and wiring harness for damage. Repair connectors and wiring harness as necessary. If connectors and wiring harness are okay, reconnect all connectors. Turn ignition on. Using scan tool, read and record FREEZE FRAME data. Road test vehicle under conditions in FREEZE FRAME data, paying particular attention to fault setting conditions such as speed, temperature, load and MAP vacuum. Recheck for DTCs. If DTC P0500: NO VEHICLE SPEED SIGNAL reoccurs, go to step 2. If DTC P0500: NO VEHICLE SPEED SIGNAL does not reoccur, no problem is indicated at this time. Test is complete.
Courtesy of DAIMLERCHRYSLER CORPORATION