B1037
DTC B1037: Driver Air Bag (2nd Stage) Circuit Short to Ground
Wiring Diagram
Refer to B1035 DTC B1035: Driver Air Bag (2nd Stage) Circuit Resistance High:Advanced Air Bag.
DTC Will be Set when
The voltage measured at driver air bag (2nd stage) initiator circuit is below a specified value for specified time.
Flow Test Description
Step 2: Check whether malfunction is in contact coil and driver air bag (inflator) module (2nd stage) or the others.
Step 3: Check driver air bag (inflator) module (2nd stage) initiator circuit.
Step 4: Check whether malfunction is in contact coil or driver air bag (inflator) module (2nd stage).
DTC Troubleshooting
1.
Was "Air Bag Diagnostic System Check" performed?
YES -
Go to Step 2.
NO -
Go to Air Bag Diagnostic System Check Air Bag Diagnostic System Check:Advanced Air Bag.
2. With ignition switch OFF, disconnect contact coil connector located under of the steering column.
Check proper connection to contact coil at terminal in "G27" connector.
If OK, then connect special tools (B) and (C) to "G27" connector disconnected in Step 1).
Special Tool
(B): 09932-75010
(C): 09932-77320
Check SDM DTC.
NOTE:
At this time, DTC B1031 may be output, but it is not related to this check.
With ignition switch ON, is DTC B1037 indicated?
YES -
Go to Step 3.
NO -
Go to Step 4.
3. With ignition switch OFF, disconnect special tools (B) and (C) from "G27" connector and SDM connector "G46" from SDM respectively.
Release Shorting bar in SDM connector inserting release tool (1) included in special tool (A).
Measure resistance between "G46-3" terminal and body ground, and between "G46-4" terminal and body ground.
Special Tool
(A): 09932-76010
(B): 09932-75010
(C): 09932-77320
Are resistances infinity?
YES -
Substitute a known-good SDM and recheck.
NO -
"BRN/RED" circuit or "BRN/BLK" circuit shorted to ground.
4. With ignition switch OFF, disconnect special tools (B) and (C) from "G27" connector and reconnect contact coil connector located under of the steering column.
Remove driver air bag (inflator) module from steering column referring to Removal and Installation Driver Air Bag (Inflator) Module Removal and Installation:Advanced Air Bag.
Check proper connection to driver air bag (inflator) module connector (connector color is black).
If OK, then connect special tools (A), (B) and (D) to driver air bag (inflator) module connector (connector color is black).
Special Tool
(A): 09932-76010
(B): 09932-75010
(C): 09932-77320
(D): 09932-78310
Check SDM DTC.
NOTE:
At this time, DTC B1031 may be output, but it is not related to this check.
With ignition switch ON, is DTC B1037 indicated?
YES -
Turn ignition switch OFF. Replace contact coil assembly referring to Contact Coil Cable Assembly Removal and Installation Contact Coil Cable Assembly Removal and Installation.
NO -
Turn ignition switch OFF. Replace driver air bag (inflator) module referring to Removal and Installation Driver Air Bag (Inflator) Module Removal and Installation:Advanced Air Bag.
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, if any. DTC Clearance
- Repeat Air Bag Diagnostic System Check Air Bag Diagnostic System Check:Advanced Air Bag
to confirm that the trouble has been corrected.