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P1564 ASCD STEERING SWITCH EC-725 < DTC/CIRCUIT DIAGNOSIS > [QR25DE] C D E F G H I J K L M A EC N P O NO >> GO TO 2. 2. CHECK ASCD STEERING SWITCH CIRCUIT With CONSULT 1. Turn ignition switch ON. 2. Select “CANCEL SW”, “RESUME/ACC SW” and “SET SW” in “DATA MONITOR” mode of “ENGINE” 3. Check each item indication as per the following conditions. Without CONSULT 1. Turn ignition switch ON. 2. Check the voltage between ECM harness connector terminals. Is the inspection result normal? YES >> GO TO 6. NO >> GO TO 3. 3. CHECK ASCD STEERING SWITCH GROUND CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect ECM harness connector. 3. Disconnect combination switch (spiral cable) harness connector. 4. Check the continuity between combination switch (spiral cable) and ECM harness connector. 5. Also check harness for short to ground and to power. Is the inspection result normal? YES >> GO TO 4. NO >> Repair or replace error-detected parts. 4. CHECK ASCD STEERING SWITCH INPUT SIGNAL CIRCUIT Monitor item Condition Indication MAIN SW MAIN switch Pressed ON Released OFF CANCEL SW CANCEL switch Pressed ON Released OFF RESUME/ACC ACCEL/RES switch Pressed ON Released OFF SET SW COAST/SET switch Pressed ON Released OFF ECM Condition Voltage (Approx.) Connector + - Terminal E60 110 111 MAIN switch: Pressed 0 V CANCEL switch: Pressed 1 V COAST/SET switch: Pressed 2 V ACCEL/RES switch: Pressed 3 V All ASCD steering switches: Released 4 V + − Continuity Combination switch (Spiral cable) ECM Connector Terminal Connector Terminal M33 28 E60 111 Existed |