SDM Cannot Communicate Through the Serial Data Circuit
SDM Cannot Communicate Through The Serial Data CircuitWiring Diagram:
Wiring Diagram
CAUTION:
- Be sure to perform Air Bag Diagnostic System Check: Except Advanced Air Bag before starting diagnosis according to flow.
- When measurement of resistance or voltage is required in this flow, 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.
- 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 data link connector (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 "Serial data" circuit.
Step 1-3:
Troubleshooting
NOTE: Upon completion of inspection and repair work, perform the following items.
- Reconnect all air bag system components, ensure all components are properly mounted.
- Repeat Air Bag Diagnostic System Check: Except Advanced Air Bag to confirm that the trouble has been corrected.