Diagnosis Procedure
- CHECK HARNESS CONNECTOR CONNECTION
Check the following harness connector for disconnection or looseness.
- CAN potential distributor electrical connector (chassis 1)
- Air bag diagnosis sensor unit
Is the inspection result normal?
YES
GO TO 2.
NO
Securely connect the harness connectors.
- CHECK POWER SUPPLY AND GROUND CIRCUIT
Check power supply and ground circuit for air bag diagnosis sensor unit. Refer to Diagnosis Procedure .
Is the inspection result normal?
YES
GO TO 3.
NO
Repair or replace the malfunctioning part.
- CHECK CIRCUIT (SHORT TO BATTERY)
- Turn ignition switch OFF.
- Disconnect the following unit connectors.
- CAN potential distributor electrical connector (chassis 1)
- Air bag diagnosis sensor unit
- Check voltage between CAN potential distributor electrical connector (chassis 1) harness connector and ground.
Terminals
Voltage
(Approx.)
+
-
CAN potential distributor electrical connector (chassis 1)
Ground
Connector
Terminal
M806
12
--
0 V
13
Is the inspection result normal?
YES
GO TO 4.
NO
Repair or replace harness.
- CHECK CIRCUIT (SHORT TO GROUND)
Check continuity between CAN potential distributor electrical connector (chassis 1) harness connector and ground.
CAN potential distributor electrical connector (chassis 1)
Ground
Continuity
Connector
Terminal
M806
12
--
Not existed
13
Is the inspection result normal?
YES
GO TO 5.
NO
Repair or replace harness.
- CHECK CIRCUIT (SHORT WITH CAN-H AND CAN-L)
Check continuity between CAN potential distributor electrical connector (chassis 1) harness connector terminals.
CAN potential distributor electrical connector (chassis 1)
Continuity
Connector
Terminal
Connector
Terminal
M806
12
M806
13
Not existed
Is the inspection result normal?
YES
GO TO 6.
NO
Repair or replace harness.
- CHECK WIRING HARNESS
Check the wiring harness externals [Between CAN potential distributor electrical connector (chassis 1) and air bag diagnosis sensor unit].
Is the inspection result normal?
YES
INSPECTION END
NO
Repair or replace harness.