Dtc U1126: Lost Communication With Steering Angle Sensor (Reception Error) - Suzuki GRAND VITARA JB416 Service Manual

DTC U1126: Lost Communication with Steering Angle Sensor (Reception Error)

Wiring Diagram
Refer to "DTC U1101: Lost Communication with TCM (Reception Error): ".
DTC Detecting Condition and Trouble Area
DTC Detecting Condition
Steering angle sensor message data is missing from CAN
communication.
DTC Troubleshooting
Step
1 Was "Electronic Stability Program Check" performed?
2 DTC check for ESP®
1) Check DTC for ESP®.
Is DTC U1126 and DTC U1073 detected together?
3 Check each control module connectors
1) Check connection of connectors of all control modules
communicating by means of CAN.
2) Check DTC for ESP®.
Is DTC U1126 detected?
4 CAN communication circuit check
1) Turn ignition switch to OFF position.
2) Disconnect connectors of ESP® control module and
steering angle sensor communicating by means of CAN.
Is each CAN communication circuit between ESP
module and steering angle sensor opened, shorted or high
resistance?
5 CAN communication circuit check
1) Disconnect connectors of all control modules
communicating by means of CAN.
Is each CAN communication circuit between disconnected
control modules (other than ESP
steering angle sensor) opened, shorted or high resistance?
6 DTC check for ESP®
1) Connect connectors of disconnected control modules
communicating by means of CAN.
2) Disconnect each connector.
• ECM
• TCM (for A/T model)
• BCM
• 4WD control module (if equipped)
• Keyless start control module (if equipped)
• Steering angle sensor
3) Check DTC for ESP®.
Is DTC U1126 detected?
Action
®
®
control module and
Electronic Stability Program:
Trouble Area
• CAN communication circuit
• Steering angle sensor
• ESP® control module
Yes
Go to Step 2.
Go to "DTC U1073:
Control Module
Communication Bus
Off: in Section 4E" for
troubleshooting.
Go to Step 4.
Repair or replace the
CAN communication
line.
control
Go to Step 6.
Check ESP® control
module power and
ground circuit. If circuits
are OK, substitute a
known-good ESP®
hydraulic unit / control
module assembly and
recheck.
4F-42
S5JB0E4604043
No
Go to "Electronic
Stability Program
Check: ".
Go to Step 3.
Check for intermittent
trouble referring to
"Intermittent and Poor
Connection Inspection:
in Section 00 in related
manual".
Go to Step 5.
Repair or replace the
CAN communication
line.
Check applicable
control module power
and ground circuit. If
circuit is OK, substitute
a known-good
applicable control
module and recheck.