8B
DTC B1025: Driver Air Bag Initiator Circuit Short to Power Circuit
Wiring Diagram
Refer to “Wiring Diagram” in DTC B1021: Driver Air Bag Initiator Circuit Resistance High .
DTC Will Set when
The voltage measured at driver air bag initiator circuit is above a specified value for specified time.
Flow Test Description
Step 1: Check whether malfunction is in contact coil and driver air bag (inflator) module or the others.
Step 2: Check driver air bag (inflator) module initiator circuit.
Step 3: Check whether malfunction is in contact coil or driver air bag (inflator) module.
Troubleshooting
Step Action YES NO
1
1) With ignition switch OFF, disconnect contact coil connector “G61” located near the base of the steering column.
2) Check proper connection to contact coil at terminals in connect coil connector “G61”.
3) If OK, then connect special tools (B) and (C) to contact coil connector “G61”.
Special Tool
(B) : 09932–75010
(C) : 09932–78340
With ignition switch ON, does DTC B1025 still exist?
Go to Step 2.
Go to Step 3.
2
1) With ignition switch OFF, disconnect special tools (B) and (C) from “G61” connector and SDM connector “G102” from SDM respectively.
2) Release shorting bar in SDM connector inserting release tool (1) included in special tool (A).
3) Measure voltage from “G102-9” terminal to body ground and from “G102-10” terminal to body ground.
Special Tool
(A) : 09932–76010
(B) : 09932–75010
(C) : 09932–78340
With ignition switch ON, are they 1 V or less?
Substitute a known-good SDM and recheck.
Repair short from “GRN” or “GRN/RED” wire circuit to power circuit.
3
1) With ignition switch OFF, disconnect special tools (B) and (C) from “G61” connector, then reconnect contact coil connector “G61” located near the base of the steering column as it was.
2) Remove driver air bag (inflator) module from steering wheel referring to Driver Air Bag (Inflator) Module Removal and Installation .
3) Check proper connection to driver air bag (inflator) module at terminals in “Q02” connector.
4) If OK, then connect special tools (A), (B) and (D) to “Q02” connector.
Special Tool
(A) : 09932–76010
(B) : 09932–75010
(C) : 09932–78340
(D) : 09932–78310
With ignition switch ON, dose DTC B1025 still exist?
Ignition switch OFF.
Replace contact coil assembly referring to Reference: Combination Switch (For Vehicle without Air Bag System)/Contact Coil and Combination Switch Assembly (For Vehicle with Air Bag System) Removal and Installation .
Ignition switch OFF.
Replace driver air bag (inflator) module referring to Driver Air Bag (Inflator) Module Removal and Installation .
NOTE:
Upon completion of inspection and repair work, perform the following items.
• Reconnect all air bag system components, ensure all components are properly mounted.
• Clear DTCs (Refer to DTC Clearance .), if any.
• Repeat Air Bag Diagnostic System Check to confirm that the trouble has been corrected.