Dtc C1091 / 1092 / 1093: Ecm / Tcm / 4Wd Control Module Data In Can Line Failure; Dtc U1073: Control Module Communication Bus Off; Dtc U1100: Lost Communication With Ecm (Reception Error) - Suzuki GRAND VITARA JB416 Service Manual

4F-39 Electronic Stability Program:

DTC C1091 / 1092 / 1093: ECM / TCM / 4WD Control Module Data in CAN Line Failure

DTC Detecting Condition and Trouble Area
DTC Detecting Condition
C1091:
ECM sent invalid signal to ESP® control module.
C1092:
TCM sent invalid signal to ESP® control module. (for A/T
model)
C1093:
4WD control module sent invalid signal to ESP® control
module. (if equipped 4WD control module)
DTC Troubleshooting
Step
1 Was "Electronic Stability Program Check" performed?
2 DTC check other control module than ESP®
1) Check DTC for ECM, TCM and/or 4WD control module.
Is there any DTC(s)?

DTC U1073: Control Module Communication Bus Off

Refer to "DTC U1073: Control Module Communication Bus Off: in Section 4E".

DTC U1100: Lost Communication with ECM (Reception Error)

Refer to "DTC U1100: Lost Communication with ECM (Reception Error): in Section 4E".
Action
Trouble Area
• Engine control system
• ECM
• ESP® control module
• A/T system
• TCM
• ESP® control module
• 4WD control system
• 4WD control module
• ESP® control module
Yes
Go to Step 2.
Go to applicable DTC
diag. flow.
S5JB0E4604041
No
Go to "Electronic
Stability Program
Check: ".
Substitute a known-
good ESP® hydraulic
unit / control module
assembly and recheck.
S5JB0E4604020
S5JB0E4604021