Dtc U1073: Control Module Communication Bus Off; Dtc U1100: Lost Communication With Ecm (Reception Error) - Suzuki GRAND VITARA 2005 Service Manual

DTC C1090: ECM Detect Rolling Counter Failure with ESP® Control Module
DTC Detecting Condition and Trouble Area
DTC Detecting Condition
ESP® control module rolling counter failure is detected by
ECM.
DTC Troubleshooting
Step
1 Was "Electronic Stability Program Check" performed?
2 DTC check for ESP®
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ignition switch ON and check DTC for ESP®.
Is there any DTC(s) other than C1038 and C1090?
3 DTC check for ECM
1) Check DTC for ECM.
Is DTC U0073 and/or DTC U0121 detected?
DTC C1091 / 1093: ECM / 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.
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 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
• Engine control system
• ECM
• ESP® control module
• 4WD control system
• 4WD control module
• ESP® control module
Action
Electronic Stability Program:
Trouble Area
• CAN communication circuit
• ECM
• ESP® control module
Yes
Go to Step 2.
Go to applicable DTC
diag. flow.
Go to applicable DTC
diag. flow.
Trouble Area
Yes
Go to Step 2.
Go to applicable DTC
diag. flow.
4F-40
S5JB0B4604079
No
Go to "Electronic
Stability Program
Check: ".
Go to Step 3.
Substitute a known-
good ESP® hydraulic
unit / control module
assembly and recheck.
S5JB0B4604089
No
Go to "Electronic
Stability Program
Check: ".
Substitute a known-
good ESP® hydraulic
unit / control module
assembly and recheck.
S5JB0B4604081
S5JB0B4604082