Speed Sensor Circuit

When Using Hand-Held Tester

CAUTION: Be sure to safely route all cables when driving with the tester connected to the vehicle (i.e., keep cables away from feet, pedals, steering wheel and shift lever).
NOTE: Two people are required when test driving with the tester: 1 person to drive the vehicle, and 1 person to operate the tester.
1. Connect the hand-held tester to the DLC3. See Figure. Turn the ignition switch ON and the hand-held tester main switch ON. Select the DATA LIST mode on the hand-held tester. When driving the vehicle, check that the parameter value of Speedometer changes on the screen of the hand-held tester. If the speed displayed on the screen of the tester changes as the vehicle speed changes, replace the combination meter. See COMBINATION METER  under REMOVAL & INSTALLATION. If the results are not as specified, go to the next step.
2. Check the harness and connector between the combination meter and ABS ECU. If the results are OK, check the speed sensor circuit and ABS ECU. See appropriate ANTI-LOCK - IS300 article in BRAKES. If the results are not good, repair or replace the harness or connector.

When Not Using Hand-Held Tester

1. See DTC P0500: VEHICLE SPEED SENSOR (VSS) MALFUNCTION under DIAGNOSTIC TESTS in appropriate SELF-DIAGNOSTICS - IS300 article in ENGINE PERFORMANCE.
2. Check the harness and connector between the combination meter and ABS ECU. If the results are OK, check the speed sensor circuit and ABS ECU. See appropriate ANTI-LOCK - IS300 article in BRAKES. If the results are not good, repair or replace the harness or connector.