DTC 42

TROUBLE CODE 42
- SOURCE VOLTAGE IS LOW.-

DIAGNOSIS:
- Faulty battery
- Faulty A.B.S. control module
- Faulty harness
- Faulty valve relay





TROUBLE SYMPTOM:
- A.B.S. does not operate.





1. CHECK INPUT VOLTAGE OF 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 input voltage between A.B.S. control module connector and body.

Connector & terminal / Specified voltage:
(P4) No.32 - Body / 9.2 - 12 V





2. CHECK INPUT VOLTAGE OF HYDRAULIC UNIT.
1) Turn ignition switch OFF.
2) Disconnect connector from hydraulic unit.
3) Turn ignition switch ON.
4) Measure input voltage between hydraulic unit connector and body.

Connector & terminal / Specified voltage:
(F1) No.1 - Body / 10 - 12 V





3. 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.32 - (F43) No.11 / 0 ohms





4. 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.)