Power Supply And Ground Circuit
POWER SUPPLY AND GROUND CIRCUIT
Description
ABS actuator and electric unit (control unit) power supply
Diagnosis Procedure
1.CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) IGNITION POWER SUPPLY (1)
1. Turn the ignition switch OFF.
2. Disconnect ABS actuator and electric unit (control unit) harness connector.
3. Check voltage between ABS actuator and electric unit (control unit) harness connector and ground.
4. Turn the ignition switch ON
CAUTION:
Never start engine.
5. Check voltage between ABS actuator and electric unit (control unit) harness connector and ground.
Is the inspection result normal?
YES - GO TO 3.
NO - GO TO 2.
2.CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) IGNITION POWER SUPPLY CIRCUIT
(1)
1. Turn the ignition switch OFF.
2. Check 10A fuse (#57).
3. Disconnect IPDM E/R harness connector.
4. Check continuity between ABS actuator and electric unit (control unit) harness connector and IPDM E/R harness connector.
5. Check for continuity between ABS actuator and electric unit (control unit) harness connector and the ground.
Is the inspection result normal?
YES - Perform trouble diagnosis for ignition power supply. Ignition Power Supply, "Wiring Diagram - IGNITION
POWER SUPPLY -".
NO - Repair or replace error-detected parts.
3.CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) IGNITION POWER SUPPLY (2)
1. Check voltage between ABS actuator and electric unit (control unit) harness connector and ground.
2. Turn the ignition switch ON
CAUTION:
Never start engine.
3. Check voltage between ABS actuator and electric unit (control unit) harness connector and ground.
Is the inspection result normal?
YES - GO TO 5.
NO - GO TO 4.
4.CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) IGNITION POWER SUPPLY CIRCUIT
(2)
1. Turn the ignition switch OFF.
2. Check 10A fuse (#74).
3. Check continuity and short circuit between ABS actuator and electric unit (control unit) harness connector terminal (49) and 10A fuse (#74).
Is the inspection result normal?
YES - Perform trouble diagnosis for ignition power supply. Ignition Power Supply, "Wiring Diagram - IGNITION
POWER SUPPLY -".
NO - Repair or replace error-detected parts.
5.CHECK MOTOR AND MOTOR RELAY POWER SUPPLY CIRCUIT
1. Turn the ignition switch OFF.
2. Check voltage between ABS actuator and electric unit (control unit) harness connector and ground.
3. Turn the ignition switch ON.
CAUTION:
Never start engine.
4. Check voltage between ABS actuator and electric unit (control unit) harness connector and ground.
Is the inspection result normal?
YES - GO TO 7.
NO - GO TO 6.
6.CHECK MOTOR AND MOTOR RELAY POWER SUPPLY CIRCUIT
1. Turn the ignition switch OFF.
2. Check 50A fusible link (M).
3. Check continuity and short circuit between ABS actuator and electric unit (control unit) harness connector terminal (4 and 47) and 50A fusible link (M).
Is the inspection result normal?
YES - Perform trouble diagnosis for battery power supply. Battery Power Supply, "Wiring Diagram - BATTERY
POWER SUPPLY -".
NO - Repair or replace error-detected parts.
7.CHECK ACTUATOR RELAY, ABS IN VALVE, ABS OUT VALVE, ANS CUT VALVE, SUCTION VALVE POWER SUPPLY
1. Turn the ignition switch OFF.
2. Check voltage between ABS actuator and electric unit (control unit) harness connector and ground.
3. Turn the ignition switch ON
CAUTION:
Never start engine.
4. Check voltage between ABS actuator and electric unit (control unit) harness connector and ground.
Is the inspection result normal?
YES - GO TO 9.
NO - GO TO 8.
8.CHECK ACTUATOR RELAY, ABS IN VALVE, ABS OUT VALVE, ANS CUT VALVE, SUCTION VALVE POWER SUPPLY CIRCUIT
1. Turn the ignition switch OFF.
2. Check 30A fusible link (L).
3. Check continuity and short circuit between ABS actuator and electric unit (control unit) harness connector terminal (1) and 30A fusible link (L).
Is the inspection result normal?
YES - Perform trouble diagnosis for battery power supply. Battery Power Supply, "Wiring Diagram - BATTERY
POWER SUPPLY -".
NO - Repair or replace error-detected parts.
9.CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) GROUND CIRCUIT
Check for continuity between ABS actuator and electric unit (control unit) harness connector and the ground.
Is the inspection result normal?
YES - GO TO 10.
NO - Repair or replace error-detected parts.
10.CHECK TERMINAL
- Check ABS actuator and electric unit (control unit) pin terminals for damage or loose connection with harness connector.
- Check IPDM E/R pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES - INSPECTION END
NO - Repair or replace error-detected parts.