SDM Cannot Communicate Through The Serial Data Circuit: Wiring Diagram

Fig 1: SDM Cannot Communicate Through Serial Data Circuit - Wiring Diagram

Courtesy of SUZUKI OF AMERICA CORP.

CAUTION:

Be sure to perform " AIR BAG DIAGNOSTIC SYSTEM CHECK " 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 ".
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 "PPL/RED" circuit.