Troubleshooting for CAN-DTC: Troubleshooting

TROUBLESHOOTING CHART

Step	Action	YES	NO
1	DTC Check Turn ignition switch to OFF position. Connect scan tool to DLC. Check DTC in the following control modules. ECM TCM ABS/ESP® control module BCM Combination meter Keyless start control module 4WD control module Is there any DTC other than CAN-DTC?	Go to applicable troubleshooting of DTC other than CAN-DTC.	Go to Step 2.
2	Control module connector check Turn ignition switch to OFF position. Be sure to disconnect scan tool from DLC. Disconnect all the following control module/sensor connectors. Control modules communicated by CAN ECM TCM ABS/ESP® control module BCM Combination meter Keyless start control module 4WD control module Sensors communicated by CAN Steering angle sensor (ESP® model) Yaw rate/G sensor assembly (ESP® del) Check for proper connection to terminal of each CAN line of all control module (communicated by CAN) connectors. If OK, connect all connectors of control module/sensor communicated by CAN securely. Recheck DTC for all control modules communicated by CAN. Is there any CAN-DTC?	Go to Step 3.	Intermittent trouble. Check for intermittent referring to INTERMITTENT AND POOR CONNECTION INSPECTION .
3	CAN line check Turn ignition switch to OFF position. Disconnect connectors of all control module/sensor communicated by CAN. Check all the following CAN lines for open, short to power circuit, short to ground circuit, short to other CAN line and high resistance. Between BCM connector and DLC Between BCM connector and ABS/ESP® control module connector Between ABS/ESP® control module connector and ECM connector Between ECM connector and TCM connector Between BCM connector and keyless start control module connector Between BCM connector and yaw rate/G sensor connector Between combination meter connector and 4WD control module connector Between BCM connector and combination meter connector Between combination meter connector and steering angle sensor connector Are all CAN lines in good condition?	Go to Step 4.	Repair CAN line.
4	Power and ground circuits check of BCM, ECM, ABS/ESP® control module and combination meter Check power and ground circuits the following control module. ECM: Refer to ECM POWER AND GROUND CIRCUIT CHECK . BCM: Refer to BCM POWER CIRCUIT AND GROUND CIRCUIT CHECK . Combination meter: Refer to COMBINATION METER CIRCUIT DIAGRAM . ABS/ESP® control module: Refer to ABS (ESP®) HYDRAULIC UNIT / CONTROL MODULE ASSEMBLY POWER AND GROUND CIRCUIT CHECK . Are they in good condition?	Go to Step 5.	Repair power and/or ground circuit.
5	CAN communication check of BCM, ECM, ABS/ESP® control module and combination meter Turn ignition switch to OFF position. Connect BCM, ECM, ABS/ESP® control module and combination meter connectors. Perform "Communication Bus Check" under "Bus Check" using SUZUKI-SDT with ignition switch turned ON. Are all of BCM, ECM, ABS/ESP® control module and combination meter normally displayed?	Go to Step 12.	Go to Step 6.
6	Terminating resistance check in ECM and combination meter Turn ignition switch to OFF position and then disconnect negative (-) cable at battery. Measure resistance between CAN High terminal (2) and CAN Low terminal (3) on DLC (1). Courtesy of SUZUKI OF AMERICA CORP. If resistance 57 - 67 Ω?	Go to Step 7.	Go to Step 8.
7	Substitute ECM and recheck Substitute a known-good ECM and recheck. Is it in good condition?	End.	Substitute a known-good combination meter and recheck. If NG, go to Step 11.
8	Terminating resistance check in ECM Make sure that ignition switch is OFF position and battery negative (-) cable is disconnected. Disconnect combination meter connector. Measure resistance between CAN high terminal and CAN low terminal on DLC as the same manner as Step 10. Is resistance 114 - 134 Ω?	Substitute a known-good combination meter.	Go to Step 9.
9	Internal circuit check in BCM Make sure that ignition switch is OFF position and battery negative (-) cable is disconnected. Disconnect ABS/ESP® control module connector. Measure resistance between the followings Between CAN high terminal on DLC and "E08-2" terminal on ABS/ESP® control module connector Between CAN low terminal on DLC and "E08-13" terminal on ABS/ESP® control module connector Is each resistance 0 - 1 Ω?	Go to Step 10.	Substitute a known-good BCM.
10	Internal circuit check in ABS/ESP® control module Make sure that ignition switch is OFF position and battery negative (-) cable is disconnected. Connect ABS/ESP® control module connector and disconnect ECM connector. Measure resistance between the followings Between CAN High terminal on DLC and "E01-4" terminal on ECM connector Between CAN Low terminal on DLC and "E01-19" terminal on ECM connector If each resistance 0 - 1 Ω?	Substitute a known-good ECM and recheck. If NG, go to step 11.	Substitute a known-good ABS/ESP® control module.
11	Substitute BCM and recheck Substitute a known-good BCM and recheck. Is it in good condition?	End.	Substitute a known-good ABS/ESP® control module.
12	CAN communication check of TCM Turn ignition switch to OFF position. Connect TCM connectors. Perform "Communication Bus Check" under "Bus Check" using SUZUKI-SDT with ignition switch turned ON. Are all of BCM, ECM, ABS/ESP® control module, combination meter and TCM normally displayed?	Go to Step 13.	Check power and ground circuits of TCM referring to TCM POWER AND GROUND CIRCUIT CHECK . If OK, substitute a known-good TCM.
13	CAN communication check of keyless start control module Turn ignition switch to OFF position. Connect keyless start control module connector. Perform "Communication Bus Check" under "Bus Check" using SUZUKI-SDT with ignition switch turned ON. Are all of BCM, ECM, ABS/ESP® control module, combination meter, TCM and keyless start control module normally displayed?	Go to Step 14.	Check power and ground circuits of keyless start control module referring to KEYLESS START CONTROL MODULE POWER AND GROUND CIRCUIT CHECK . If OK, substitute a known-good keyless start control module.
14	CAN communication check of Yaw rate/G sensor assembly (ESP® model) Turn ignition switch to OFF position. Connect Yaw rate/G sensor assembly connector. Perform "Communication Bus Check" under "Bus Check" using SUZUKI-SDT with ignition switch turned ON. Are all of BCM, ECM, ABS/ESP® control module, combination meter, TCM, keyless start control module and Yaw rate/G sensor assembly normally displayed?	Go to Step 15.	Check power and ground circuit of Yaw rate/G sensor assembly referring to "Step 3" to "Step 5" under DTC C1034 / C1039: YAW RATE / G SENSOR ASSEMBLY POWER SUPPLY FAILURE / INTERNAL FAILURE . If OK, substitute a known-good Yaw rate/G sensor assembly.
15	CAN communication check of 4WD control module Turn ignition switch to OFF position. Connect combination meter connector and 4WD control module. Perform "Communication Bus Check" under "Bus Check" on SUZUKI-SDT with ignition switch turned ON. Are all of BCM, ECM, ABS/ESP® control module, combination meter, TCM, keyless start control module, Yaw rate/G sensor assembly, combination meter and 4WD control module normally displayed?	Go to Step 16.	Check power and ground circuits of 4WD control module referring to "Step 2" and "Step 3" under DTC C1240: 4WD CONTROL MODULE POWER SUPPLY CIRCUIT MALFUNCTION . If OK, substitute a known-good 4WD control module.
16	CAN communication check of steering angle sensor (ESP® model) Turn ignition switch to OFF position. Connect steering angle sensor. Perform "Communication Bus Check" under "Bus Check" using SUZUKI-SDT with ignition switch turned ON. Are all of BCM, ECM, ABS/ESP® control module, combination meter, TCM, keyless start control module, Yaw rate/G sensor assembly, combination meter, 4WD control module and steering angle sensor normally displayed?	Recheck DTC.	Check power and ground circuit of steering angle sensor referring to "Step 4" and "Step 5" under DTC C1037: STEERING ANGLE SENSOR POWER SUPPLY FAILURE . If OK, substitute a known-good Yaw rate/G sensor assembly.