1A
DTC P0500 (No.16): Vehicle Speed Sensor (VSS) Malfunction
Wiring Diagram
1. VSS 2. ECM 3. To combination meter
DTC Detecting Condition and Trouble Area
DTC detecting condition Trouble area
• VSS signal not inputted while vehicle running in “D” range or during fuel cut at deceleration.
• “BLK/ORN” circuit open
• “YEL/GRN” or “BLU/BLK” circuit open or short
• VSS malfunction
• ECM malfunction
• Combination meter malfunction
DTC Confirmation Procedure
WARNING:
• When performing a road test, select a place where there is no traffic or possibility of a traffic accident and be very careful during testing to avoid occurrence of an accident.
• Road test should be carried out with 2 persons, a driver and a tester.
1) Clear DTC and warm up engine to normal operating temperature.
2) Increase vehicle speed to 50 mph, 80 km/h in 3rd gear or “2” range while observing vehicle speed displayed on scan tool.
3) Release accelerator pedal and with engine brake applied, keep vehicle coasting (fuel cut condition) for 4 sec. or more.
4) Select “DTC” mode on scan tool and check DTC.
DTC Troubleshooting
Step Action YES NO
1
Was “Engine and Emission Control System Check” performed?
Go to Step 2.
Go to Engine and Emission Control System Check:M13A without VVT .
2
Does speedometer indicate vehicle speed?
Go to Step 3.
Go to Step 5.
3
Check vehicle speed signal
Is vehicle speed displayed on scan tool in Step 2) and 3) of DTC confirmation procedure?
Intermittent trouble or faulty ECM. Check for intermittent referring to Intermittent and Poor Connection Inspection .
Go to Step 4.
4
Check VSS signal circuit
1) Turn ignition switch to OFF position.
2) Disconnect combination meter connectors. Refer to Combination Meter Removal and Installation .
3) Turn ignition switch to ON position, without running engine.
4) Measure voltage from terminal “c” of VSS connector to ground.
Is voltage within 4 – 5 V?
Faulty speedometer.
“YEL/GRN” wire open or short. Poor connection of ECM connector terminal.
If OK, substitute a known-good ECM and recheck.
5
Check VSS power supply
1) With ignition switch at OFF position, disconnect VSS connector.
2) Turn ignition switch to ON position, without running engine.
3) Measure voltage from terminal “a” to “b” of VSS connector.
Is voltage within 10 – 14 V?
Go to Step 6.
“BLU/BLK” or “BLK/ORN” wire open or short.
6
Check VSS signal circuit
1) Measure voltage from terminal “c” of VSS connector to ground.
Is voltage more than 4 V?
Go to Step 7.
“YEL/GRN” wire open or short. Poor connection of ECM connector terminal.
If OK, substitute a known-good ECM and recheck.
7
1) Check VSS and signal rotor referring to Vehicle Speed Sensor (VSS) Inspection:M13A .
Is it in good condition?
Substitute a known-good ECM and recheck.
Clean or replace rotor teeth or replace VSS.