DTC P0500: NO VEHICLE SPEED SENSOR SIGNAL
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 7 .
2. 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.
3. Ensure ignition is off. Disconnect 14-pin CAB module connector. CAB module is located near power distribution center at driver's side of engine compartment. See Fig. 47 . On models with 4-wheel anti-lock brakes which may be referred to as 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. On all models, turn ignition on with engine off. Using voltmeter, check voltage between ground and terminal No. 12 (White/Orange wire) on 14-pin CAB module connector. 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. PCM is located at passenger's side rear corner of engine compartment. Perform TEST VER-5A .
4. Turn ignition off. Ensure 14-pin CAB module connector is still disconnected. Disconnect PCM connectors. PCM is located at passenger's side rear corner of engine compartment. 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-5A .
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-5A .
6. Ensure ignition is off. Reinstall PCM connectors. Ensure 14-pin CAB module connector is still disconnected. Turn ignition on with engine off. Connect one end of jumper wire to terminal No. 12 (White/Orange wire) on 14-pin CAB module connector. Using scan tool, monitor vehicle speed sensor signal while momentarily touching other 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 CAB module. Perform TEST VER-5A .
7. DTC is being caused by an intermittent problem. Raise and support vehicle so rear wheels are free to rotate. Start engine and allow engine to idle. Using scan tool, monitor vehicle speed sensor signal. Place transmission in any forward gear and allow wheels to rotate. If scan tool displays more than zero MPH, go to next step. If scan tool displays zero MPH, go to step 9 .
8. Shut engine off. At this time, conditions required to set DTC are not present. 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. Vehicle must be road tested, as this DTC cannot be stored by operating vehicle on a hoist. Inspect wiring harness and connectors between PCM and CAB module. PCM is located at passenger's side rear corner of engine compartment. CAB module is located on top of Hydraulic Control Unit (HCU) at driver's side of engine compartment, near power distribution center. See Fig. 47 . If no problems exist, test is complete. If any problems exist, repair wiring or connectors as necessary. Perform TEST VER-5A .
9. Shut engine off. Turn ignition on. Using scan tool, check CAB module for DTCs. See appropriate ANTILOCK 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.
10. Ensure ignition is off. Disconnect 14-pin CAB module connector. CAB module is located near power distribution center at driver's side of engine compartment. See Fig. 47 . On models with 4-wheel anti-lock brakes which may be referred to as 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. On all models, 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. PCM is located at passenger's side rear corner of engine compartment. Perform TEST VER-5A .
11. Turn ignition off. Ensure 14-pin CAB module connector is still disconnected. Disconnect PCM connectors. PCM is located at passenger's side rear corner of engine compartment. Using ohmmeter, check resistance between terminal No. 12 (White/Orange wire) on 14-pin CAB module connector an 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-5A .
12. 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, replace PCM. Perform TEST VER-5A . If resistance is less than 5 ohms, repair short to ground on White/Orange wire between CAB module and PCM. Perform TEST VER-5A .