Advanced Air Bag

DTC B1031: Driver Air Bag (1st Stage) Circuit High Resistance

Wiring Diagram










DTC Detecting Condition and Trouble Area






DTC Troubleshooting



1.
Was "Air Bag Diagnostic System Check Flow" performed?
YES
Go to Step 2.
NO
Go to Air Bag Diagnostic System Check Flow:Advanced Air Bag.

2. Drive air bag 1st stage circuit check

With ignition switch turned OFF, disconnect contact coil connector located under the steering column.
Check for proper connection to contact coil at terminal in "G347" connector.
If OK, then connect special tools (A) and (B) to "G347" connector disconnected in Step 1).
Special Tool

(A): 09932-75010

(B): 09932-77320





Check SDM for DTC.

NOTE:
At this time, DTC B1035 may be output, but it is not related to this check.

With ignition switch turned ON, is DTC B1031 indicated?
YES
Go to Step 3.
NO
Go to Step 5.

3. Driver air bag 1st stage circuit check

Disconnect SDM connector "L04".
Check for proper connection to SDM connector at terminal "L04-3" and "L04-4".
If OK, release shorting bar in SDM connector inserting release tool (1) included in special tool (A).
Special Tool

(A): 09932-76010

Measure resistance between "L04-3" and "G347-2" terminals.
Measure resistance between "L04-4" and "G347-1" terminals.






Is each measured resistance 1ohms or less?
YES
Substitute a known-good SDM and recheck.
NO
Go to Step 4.

4. Floor harness circuit check

Disconnect "L401" connector located near the driver side front pillar lower trim.
Check for proper connection to floor harness connector at terminal "L401-3" and "L401-4".
If OK, release shorting bar in SDM connector inserting release tool (1) included in special tool (A).
Special Tool

(A): 09932-76010

Measure resistance between "L04-3" and "L401-3" terminals.
Measure resistance between "L04-4" and "L401-4" terminals.






Is each measured resistance 1ohms or less?
YES
Repair high resistance or open wire in "PNK/GRN" or "LT BLU" circuit at instrument panel harness.
NO
Repair high resistance or open wire in "PNK/GRN" or "LT BLU" circuit at floor harness.

5. Contact coil circuit check

Check contact coil circuit referring to Testing and Inspection Contact Coil Cable and Its Circuit Check:Advanced Air Bag.

Is contact coil circuit in good condition?
YES
Replace driver air bag (inflator) module referring to Driver Air Bag (Inflator) Module Removal and Installation:Advanced Air Bag.
NO
Replace contact coil assembly referring to Contact Coil Cable Assembly Removal and Installation.

NOTE:

Upon completion of inspection and repair work, perform the following items.

- Reconnect all air bag system components and ensure all components are properly mounted.
- Clear DTCs referring to DTC Clearance DTC Clearance:Advanced Air Bag
, if any.
- Repeat Air Bag Diagnostic System Check Air Bag Diagnostic System Check:Advanced Air Bag
to confirm that the trouble has been corrected.