Troubleshooting For Can-Dtc - Suzuki SX4 Service Manual

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Troubleshooting for CAN-DTC

Perform this troubleshooting when CAN-DTC is detected.
NOTE
• When performing this troubleshooting, be sure to have full understanding of "Precaution on CAN
Troubleshooting" and observe it.
• It may be possible that CAN system has trouble because of fuse blown or low battery voltage.
Before troubleshooting, check to make sure that fuse, battery voltage and generator status are
normal.
• When performing "Communication Bus Check" using SUZUKI scan tool (SUZUKI-SDT) in each step
of this troubleshooting, use the following table to determine whether the control module is in good
condition or not.
Also, while performing "Communication Bus Check", do not perform any work other than instructed
in this troubleshooting. Or, it may occur that display of control module/sensor on SUZUKI-SDT
screen and/or its background color may change.
Judgment
• All connected control modules/sensors (communicated by CAN) are displayed and its back ground
Normal
color is "White".
• Even one of connected control modules/sensors (communicated by CAN) is not displayed.
• Display of even one of connected control modules/sensors (communicated by CAN) changes.
• Background color of even one of connected control modules/sensors (communicated by CAN) is
Abnormal
displayed in "Gray" or "Light green".
• Background color of even one of connected control modules/sensors (communicated by CAN)
changes
• When disconnecting each control module connector in this troubleshooting, various DTCs will be
detected. Be sure to clear DTCs in the following control modules after completing this
troubleshooting.
– ECM
– BCM
– TCM
– Keyless start control module
– ESP® control module
– 4WD control module
– HVAC control module (Auto A/C model)
– P/S control module
Wiring Diagram
Refer to "Troubleshooting for Communication Error with Scan Tool Using CAN".
Trouble area
Refer to "Troubleshooting for Communication Error with Scan Tool Using CAN".
Engine General Information and Diagnosis:
Display of Communication Bus Check
1A-167
S7RW0A1104075

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