Warning Light Does Not Illuminate

TROUBLE CODE (NONE: A)
- TROUBLE IN WARNING LIGHT DRIVE CIRCUIT-

DIAGNOSES:
- Faulty A.B.S. warning light
- Faulty harness connector
- Faulty A.B.S. control module
- Faulty valve relay








TROUBLE SYMPTOM:
- Warning light does not illuminate.
- Impossible to read trouble code.

NOTE: When ignition key is on, warning light should turn off after 1.5 seconds if system is normal.





1. CHECK A.B.S. WARNING LIGHT POWER SUPPLY.
1) Turn ignition switch OFF.
2) Disconnect combination meter.
3) Check A.B.S. warning light valve.
4) Turn ignition switch ON.
5) Measure voltage between combination meter connector and body.

Connector & terminal / Specified voltage:
(118) No.13 - Body / 10 - 12 V





2. CHECK INPUT VOLTAGE OF A.B.S. CONTROL MODULE AND HYDRAULIC UNIT FROM A.B.S. WARNING LIGHT.
1) Turn ignition switch OFF and remove combination meter.
2) Disconnect connector from A.B.S. control module and hydraulic unit.
3) Turn ignition switch ON.
4) Measure voltage between A.B.S. control module and body, and between hydraulic unit and body.

Connector & terminal / Specified voltage:
(P4) No.29 - body / 10 - 12 V
(F43) No.10 - body / 10 - 12 V





3. CHECK GROUND LINE OF A.B.S. CONTROL MODULE AND HYDRAULIC UNIT.
1) Measure resistance between ABS. control module and body, and between hydraulic unit and body.

Connector & terminal / Specified resistance:
(P4) No.10 - body / 0 ohms
(P4) No.20 - body / 0 ohms
(P4) No.34 - body / 0 ohms
(F43) No.8 - body / 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.)