7C: Trouble Code Does Not Appear

TROUBLE CODE DOES NOT APPEAR.

DIAGNOSIS:
- Diagnosis circuit is open.

TROUBLE SYMPTOM:
- The ABS warning light turns on or off normally but the start code cannot be read out in the diagnostic mode.





WIRING DIAGRAM

7C1: CHECK DIAGNOSIS TERMINAL.





Measure resistance between diagnosis terminals (B81) and chassis ground.
Terminals
Diagnosis terminal (A)-Chassis ground:
Diagnosis terminal (B)-Chassis ground:
CHECK: Is the resistance less than 0.5 ohms?
YES: Go to step 7C2.
NO: Repair diagnosis terminal harness.

7C2: CHECK DIAGNOSIS LINE.
1. Turn ignition switch to OFF.
2. Connect diagnosis terminal (B81) to diagnosis connector (B82) No. 6.
3. Disconnect connector from ABSCM & H/U.





4. Measure resistance between ABSCM & H/U connector and chassis ground.
Connector & terminal
(F49) No. 4-Chassis ground:
CHECK: Is the resistance less than 0.5 ohms?
YES: Go to step 7C3.
NO: Repair harness connector between ABSCM&H/U and diagnosis connector.

7C3 CHECK POOR CONTACT IN ABSCM & H/U CONNECTOR.
CHECK: Is there poor contact in ABSCM&H/U connector:
YES: Repair connector.
NO: Replace ABSCM&H/U