B1321

DTC B1321 / B1325: Left / Right Side-Air Bag Initiator Circuit Resistance High

Wiring Diagram










DTC Will be Set when

The combined resistance of the side-air bag (inflator) module (left or right), harness wiring and connector terminal contact is above a specified value for specified time.

Flow Test Description

Step 2: Check whether malfunction is in side-air bag (inflator) module.

Step 3: Check side-air bag initiator circuit in floor harness.

Step 4: Check side-air bag initiator circuit in seat harness.

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:Except Advanced Air Bag.
2. With ignition switch OFF, disconnect side-air bag (inflator) module connector under front seat cushion.
Check proper connection to left or right side-air bag (inflator) module at terminals in "L25" or "L30" connector.
If OK, then connect special tools (B) and (C) to side-air bag (inflator) module connector disconnected at the Step 1).
Special Tool

(B): 09932-75010

(C): 09932-78340

Check SDM DTC.
With ignition switch ON, is DTC B1321 or B1325 still indicated?
YES
Go to Step 3.
NO
Go to Step 4.
3. With ignition switch OFF, disconnect SDM connector "L33".
Check proper connection to SDM at terminals "L33-1" and "L33-2" or "L33-3" and "L33-4".
If OK, release shorting bar in SDM connector inserting release tool (1) included in special tool (A).
Measure resistance between "L33-1" and "L33-2" terminals (for DTC B1321) or "L33-3" and "L33-4" terminals (for DTC B1325) with connected special tool (B) and (C).
Special Tool

(A): 09932-76010

(B): 09932-75010

(C): 09932-78340

Is resistance 5.5 or less?
YES
Substitute a known-good SDM and recheck.
NO
DTC B1321: Repair high resistance or open in "GRY/RED" or "GRY" wire circuit in floor harness.
DTC B1325: Repair high resistance or open in "BRN/WHT" or "BRN" wire circuit in floor harness.
4. With ignition switch OFF, disconnect special tools (B) and (C) then reconnect connector "L25" or "L30".
Disconnect side-air bag (inflator) module connector "Q07" or "Q05" from side-air bag (inflator) module.
Check proper connection to side-air bag (inflator) module at terminal in connector.
If OK, then connect special tools (A), (B) and (C) to side-air bag (inflator) connector.
Special Tool

(A): 09932-76010

(B): 09932-75010

(D): 09932-78310

Check SDM DTC.
With ignition switch ON, is DTC B1321 or B1325 still indicated?
YES
DTC B1321: Repair high resistance or open in "GRY/RED" or "GRY" wire circuit in seat harness.
DTC B1325: Repair high resistance or open in "BRN/WHT" or "BRN" wire circuit in seat harness.
NO
Replace side-air bag (inflator) module referring to Side-Air Bag (Inflator) Module Removal and Installation Side-Air Bag (Inflator) Module Removal and Installation:Except Advanced Air Bag.

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 referring to DTC Clearance DTC Clearance:Except Advanced Air Bag
, if any.
- Repeat Air Bag Diagnostic System Check Air Bag Diagnostic System Check:Except Advanced Air Bag
to confirm that the trouble has been corrected.