DTC Troubleshooting

WARNING: This page is about a different car, the 2006 Suzuki XL-7. However, it is still accessible from the selected car via links, so may be relevant.

TEST PROCEDURE - SERIAL COMMUNICATION PROBLEM BETWEEN OCM AND SDM

Step	Action	YES	NO
1	With ignition switch OFF, connect scan tool to DLC. Turn ON ignition switch. Check for OCM DTC displayed on scan tool. Is DTC B1211 indicated?	Go to Step 2.	Intermittent trouble. Check for intermittent trouble referring to INSPECTION OF INTERMITTENT AND POOR CONNECTIONS .
2	With ignition switch OFF, disconnect connectors from OCM and SDM. Check for proper connection of OCM connector and seat controller harness connector "L64" at "BLU/RED" wire terminal and "BLK" wire terminal. Measure resistance between "L66-8" terminal of OCM connector and vehicle body ground, between "L66-4" terminal of OCM connector and vehicle body ground. Courtesy of SUZUKI OF AMERICA CORP. Is each measured resistance 1 Ω or less?	Go to Step 3.	"RED" circuit (in instrument panel and floor harness), "BLU/RED" circuit (in passenger seat harness), "RED/WHT" circuit (in instrument panel and floor harness) or "BLK" circuit (in passenger seat harness) shorted to ground.
3	Measure voltage between "L66-8" terminal of OCM connector and vehicle body ground, between "L66-4" terminal of OCM connector and vehicle body ground. Courtesy of SUZUKI OF AMERICA CORP. With ignition switch ON, is each measured value 1 V or less?	Go to Step 4.	"RED" circuit (in instrument panel and floor harness), "BLU/RED" circuit (in passenger seat harness), "RED/WHT" circuit (in instrument panel and floor harness) or "BLK" circuit (in passenger seat harness) shorted to power supply circuit.
4	With ignition switch OFF, disconnect connectors from OCM and SDM. Using service wire, connect "L66-4" and "L66-8" terminals of OCM connector. Measure resistance between "G92-3" terminal and "G92-10" terminal of SDM connector. Special Tool (A): 09932-76010 Courtesy of SUZUKI OF AMERICA CORP. Is resistance 1 Ω or less?	Go to Step 3.	High resistance or open wire in "RED" circuit (in instrument panel and floor harness), "BLU/RED" circuit (in passenger seat harness), "RED/WHT" circuit (in instrument panel and floor harness) or "BLK" circuit (in passenger seat harness).

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.
Clear DTCs referring to DTC CLEARANCE FOR SDM and DTC CLEARANCE FOR OCM , if any.
Repeat AIR BAG DIAGNOSTIC SYSTEM CHECK to confirm that the trouble has been corrected.
Perform occupant classification system rezeroing referring to OCCUPANT CLASSIFICATION SYSTEM REZEROING .
Perform occupant classification system sensitivity check referring to OCCUPANT CLASSIFICATION SYSTEM SENSITIVITY CHECK after system rezeroing.