DTC P0500: NO VEHICLE SPEED SENSOR SIGNAL Dodge Durango I

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article.

Note. Vehicle speed sensor signal is monitored when engine is running, transmission is in gear and output shaft speed is more than 64 RPM, engine coolant temperature is more than 104°F (40°C), MAP sensor vacuum is 15-16 in. Hg. and engine speed is more than 1500 RPM. DTC may be stored in Powertrain Control Module (PCM) when PCM senses no vehicle speed signal from Controller Anti-Lock Brake (CAB) module for more than 15 seconds for 2 consecutive trips. Possible causes are: CAB module DTCs exist, defective CAB module, defective PCM, or defective connectors or wiring.

Scheme 52

1. Turn ignition on with engine off. Using scan tool, check for DTCs. If DTC SPECIFIC GOOD TRIP counter is displayed and equal to zero, go to next step. If DTC SPECIFIC GOOD TRIP counter is not displayed and equal to zero, go to step 8.
2. Ensure is ignition on with engine off. Using scan tool, check CAB module for DTCs. See appropriate ANTI-LOCK article in BRAKES. If no CAB module DTCs exist, go to next step. If any CAB module DTCs exist, perform test procedures for CAB module DTCs and then perform «TEST VER-5»(ref-9482-S35719050532000102700000).
3. Ensure ignition is off. Disconnect PCM connectors. PCM is located at passenger's side front corner of engine compartment on inner fender panel. Disconnect 14-pin CAB module connector. CAB module is located at driver's side front corner of engine compartment, near battery and power distribution center. (Scheme 52) On models with 4-wheel anti-lock brakes which may be referred to as Electronic Brake Control (EBC) 325, there are 2 connectors at CAB module. Connector C1 is a 14-pin connector and connector C2 is a 4-pin connector. On models with rear wheel anti-lock brakes which may be referred to as EBC 2, there is only one 14-pin connector at CAB module.
4. On all models, using ohmmeter, check resistance between terminal No. 12 (White/Orange wire) on 14-pin CAB module connector and terminal No. 27 (White/Orange wire) on PCM connector C2. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open on White/Orange wire between CAB module and PCM. Perform «TEST VER-5»(ref-9482-S35719050532000102700000).
5. Ensure 14-pin CAB module connector is still disconnected and PCM connectors are still disconnected. Using ohmmeter, check resistance between ground and terminal No. 27 (White/Orange wire) on PCM connector C2. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground on White/Orange wire between CAB module and PCM. Perform «TEST VER-5»(ref-9482-S35719050532000102700000).
6. Ensure ignition is off. Reinstall PCM connectors. Ensure 14-pin CAB module connector is still disconnected. Turn ignition on with engine off. Using voltmeter, check voltage at terminal No. 12 (White/Orange wire) on 14-pin CAB module connector. This is the vehicle speed sensor signal circuit. If voltage is 6 volts or less, go to next step. If voltage is more than 6 volts, repair short to voltage on White/Orange wire between CAB module and PCM. Perform «TEST VER-5»(ref-9482-S35719050532000102700000).
7. Turn ignition off. Connect one end of jumper wire to terminal No. 12 (White/Orange wire) on 14-pin CAB module connector. Turn ignition on with engine off. Using scan tool, monitor vehicle speed sensor signal while momentarily touching other end of jumper wire to ground. If scan tool displays zero MPH, replace PCM. Perform «TEST VER-5»(ref-9482-S35719050532000102700000). If scan tool displays more than zero MPH, replace CAB module. Perform «TEST VER-5»(ref-9482-S35719050532000102700000).
8. At this time, conditions required to set DTC are not present. Start engine and allow engine to idle. Wiggle wiring harness and connectors between CAB module and PCM while noting DTC SPECIFIC GOOD TRIP counter. CAB module is located at driver's side front corner of engine compartment, near battery and power distribution center. (Scheme 52) PCM is located at passenger's side front corner of engine compartment on inner fender panel. If DTC SPECIFIC GOOD TRIP counter does not change to zero while wiggling wiring harness and connectors, shut engine off. Go to next step. If DTC SPECIFIC GOOD TRIP counter changes to zero while wiggling wiring harness and connectors, shut engine off. Repair wiring or connectors between CAB module and PCM as necessary. Perform «TEST VER-5»(ref-9482-S35719050532000102700000).
9. Using scan tool, read FREEZE FRAME data to determine when DTC was stored. Attempt to duplicate conditions recorded in FREEZE FRAME data to see if DTC reoccurs. Inspect wiring harness and connectors between PCM and CAB module. Inspect PCM connectors and CAB module connector(s) for corroded, pushed out or damaged terminals. Also, check for related Technical Service Bulletins (TSBs). If terminals are not corroded, pushed out or damaged and wiring harness is okay, test is complete. If terminals are corroded, pushed out or damaged, or wiring harness is damaged, repair as necessary. Perform «TEST VER-5»(ref-9482-S35719050532000102700000).