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VEHICLE SPEED SIGNAL CIRCUIT STC-11 < DTC/CIRCUIT DIAGNOSIS > C D E F H I J K L M A B STC N O P VEHICLE SPEED SIGNAL CIRCUIT Description INFOID:0000000005515251 Combination meter sends vehicle speed signal to power steering control unit. Diagnosis Procedure INFOID:0000000005515252 1. PERFORM COMBINATION METER SELF-DIAGNOSIS With CONSULT-III 1. Turn the ignition switch ON. CAUTION: Never start the engine 2. Perform “METER/M&A” self-diagnosis. Refer to MWI-34, "CONSULT-III Function (METER/M&A)" . Is any DTC detected? YES >> Check the DTC. NO >> GO TO 2. 2. CHECK HARNESS BETWEEN COMBINATION METER AND POWER STEERING CONTROL UNIT 1. Turn the ignition switch OFF. 2. Disconnect combination meter harness connector. 3. Disconnect power steering control unit harness connector. 4. Check continuity between combination meter harness connector and power steering control unit harness 5. Check continuity between power steering control unit harness connector and ground. Is the inspection result normal? YES >> GO TO 3. NO >> Repair or replace damaged parts. 3. CHECK VEHICLE SPEED SIGNAL (1) 1. Turn the ignition switch OFF. 2. Connect combination meter harness connector. 3. Check combination meter input/output standard values. Refer to Is the inspection result normal? YES >> GO TO 4. NO >> Replace combination meter Refer to . 4. CHECK VEHICLE SPEED SIGNAL (2) 1. Turn the ignition switch OFF. 2. Connect power steering control unit harness connector. 3. Check signal between power steering control unit harness connector and ground with oscilloscope. Combination meter Power steering control unit Continuity Connector Terminal Connector Terminal M34 30 M61 8 Existed Power steering control unit — Continuity Connector Terminal M61 8 Ground Not existed |