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EC-340 < COMPONENT DIAGNOSIS > [VK56DE] P1572 ICC BRAKE SWITCH 4. Also check harness for short to ground and short to power. OK >> GO TO 5. NG >> Repair open circuit or short to ground or short to power in harness or connectors. 5. CHECK ICC BRAKE HOLD RELAY POWER SUPPLY CIRCUIT 1. Turn ignition switch ON. 2. Check the voltage between ICC brake hold relay terminal 4 and ground with CONSULT-III or tester. OK or NG OK >> GO TO 14. NG >> GO TO 6. 6. DETECT MALFUNCTIONING PART Check the following. • Harness connectors M31, E152 • Fuse block (J/B) connector M4 • 10 A fuse (No.15) • Harness for open or short between ICC brake hold relay and fuse >> Repair open circuit or short to ground or short to power in harness or connectors. 7. CHECK ICC BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 1. Turn ignition switch OFF. 2. Disconnect ECM harness connector. 3. Check harness continuity between ICC brake switch terminal 2 and ECM terminal 108, ICC brake switch terminal 2 and ICC unit terminal 29. Refer Wiring Diagram. 4. Also check harness for short to ground and short to power. OK >> GO TO 8. NG >> Repair open circuit or short to ground or short to power in harness or connectors. 8. CHECK ICC BRAKE SWITCH EC-343, "Component Inspection" OK or NG OK >> GO TO 15. NG >> Replace ICC brake switch. 9. CHECK POWER SUPPLY CIRCUIT 1. Turn ignition switch OFF. Continuity should exist. Voltage: Battery voltage MBIB0059E Continuity should exist. |