Restraints - Except Advanced Air Bag Diagnostics
DTC B1021: Driver Air Bag Initiator Circuit Resistance HighWiring Diagram:
Wiring Diagram
CAUTION:
- Be sure to perform Air Bag Diagnostic System Check:Except Advanced Air Bag before starting diagnosis according to flow. Air Bag Diagnostic System Check
- When measurement of resistance or voltage is required in this table, use a specified digital multimeter (Refer to Special Tool:Except Advanced Air Bag.) along with a correct terminal adapter from special tool (Connector test adapter kit).
- When a check for proper connection is required, refer to Inspection of Intermittents and Poor Connections:Except Advanced Air Bag. Inspection of Intermittent and Poor Connections
- If there is open circuit in the air bag wire harness, connector or terminal is found damaged, replace the wire harness, connector and terminal as an assembly.
DTC Will Set when
The combined resistance of the driver air bag (inflator) module, contact coil assembly, harness wiring and connector terminal contact 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 in air bag harness.
STEP 3: Check whether malfunction is in contact coil or driver air bag (inflator) module.
Step 1:
Step 2:
Step 3:
DTC Troubleshooting