SDM Cannot Communicate Through the Serial Data Circuit

SDM Cannot Communicate through the Serial Data Circuit

Wiring Diagram:

Wiring Diagram

CAUTION:
- Be sure to perform Air Bag Diagnostic System Check: Advanced Air Bag before starting diagnosis according to flow.
- When measurement of resistance or voltage is required in this flow, use a tester 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 Intermittent and Poor Connections: Advanced Air Bag.
- 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.

Flow Test Description
Step 1: An improper connection to the DLC will prevent communications from being established.
Step 2: This test checks whether it is possible to communicate with other control module.
Step 3: This test checks for an open in "BLU" circuit.

Step 1-3:

Troubleshooting

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.
- Repeat Air Bag Diagnostic System Check: Advanced Air Bag to confirm that the trouble has been corrected.