DTC 51
TROUBLE CODE 51- FAULTY VALVE RELAY-
DIAGNOSIS:
- Faulty valve relay
- Faulty harness
- Faulty A.B.S. control module
TROUBLE SYMPTOM:
- A.B.S. does not operate.
1. CHECK POWER SUPPLY CIRCUIT OF A.B.S. CONTROL MODULE.
1) Turn ignition switch OFF.
2) Disconnect connector from A.B.S. control module.
3) Turn ignition switch ON.
4) Measure voltage between A.B.S. control module connector terminals.
Connector & terminal / Specified voltage:
(P4) No.1 - No.20 / 10 - 12 V
2. CHECK OUTPUT VOLTAGE TO A.B.S. CONTROL MODULE.
1) Turn ignition switch OFF.
2) Disconnect connector from A.B.S. control module.
3) Disconnect connector cover from connector.
4) Connect connector to A.B.S. control module.
5) Turn ignition switch ON.
6) Measure voltage between A.B.S. control module connector terminals.
Connector & terminal / Specified voltage:
(P4) No.17 - No.20 / 10 - 12 V
3. CHECK INPUT VOLTAGE OF A.B.S. CONTROL MODULE.
1) Turn ignition switch ON.
2) Measure voltage between A.B.S. control module connector terminals.
Connector & terminal / Specified voltage:
(P4) No.32 - No.20 / 10 - 12 V
4. CHECK HARNESS CONNECTOR BETWEEN A.B.S. CONTROL MODULE AND HYDRAULIC UNIT.
1) Turn ignition switch OFF.
2) Disconnect connector from A.B.S. control module and hydraulic unit.
3) Measure resistance between A.B.S. control module and hydraulic unit.
Connector & terminal / Specified resistance:
(P4) No.17 - (F43) No.6 / 0 ohms
(P4) No.32 - (F43) No.11 / 0 ohms
(P4) No.27 - (F43) No.12 / 0 ohms
5. CHECK POWER SUPPLY CIRCUIT OF HYDRAULIC UNIT.
1) Turn ignition switch OFF.
2) Disconnect connector from hydraulic unit.
3) Turn ignition switch ON.
4) Measure voltage between hydraulic unit and body.
Connector & terminal / Specified voltage:
(F1) No.1 - Body / 10 - 12 V
6. CHECK VALVE RELAY.
1) Remove valve relay.
2) Attach circuit tester probes to terminals, as shown in figure.
3) Measure resistance between respective terminals.
Terminal / Specified resistance:
No.87 - 30 / 0 ohms (when 12 volts applied.)
No.87 - 30 / 1 Mohms (when no voltage is applied.)
No. 87a - 30 / 1 Mohms (when 12 volts applied.)
No. 87a - 30 / 0 ohms (when no voltage is applied.)