Diagnosis Procedure

CHECK UNIFIED METER AND A/C AMP. INPUT SIGNAL
1. Turn ignition switch ON.
2. Check voltage between unified meter and A/C amp. harness connector M66 terminal 9 and ground.
  9 - Ground
  
  When driver seat belt is fastened : Approx. 12 V
  
  When driver seat belt is unfastened : Approx. 0 V
Is the inspection result normal?

YES: Replace unified meter and A/C amp.

NO: GO TO 2.
CHECK SEAT BELT BUCKLE SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect unified meter and A/C amp. connector and seat belt buckle switch (driver side) connector.
3. Check continuity between unified meter and A/C amp. harness connector M66 terminal 9 and seat belt buckle switch (driver side) harness connector B13 terminal 1.
  9 - 1 : Continuity should exist.
4. Check harness continuity between unified meter and A/C amp. harness connector M66 terminal 9 and ground.
  9 - Ground : Continuity should not exist.
Is the inspection result normal?

YES: GO TO 3.

NO: Repair harness or connector.
CHECK SEAT BELT BUCKLE SWITCH GROUND CIRCUIT
Check harness continuity between seat belt buckle switch (driver side) harness connector B13 terminal 2 and ground.

2 - Ground : Continuity should exist.

Is the inspection result normal?

YES: INSPECTION END

NO: Repair harness or connector.