Suzuki Grand Vitara JB416 / JB420 (ESP model). Service manual - part 72

 

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Suzuki Grand Vitara JB416 / JB420 (ESP model). Service manual - part 72

 

 

4F-42 Electronic Stability Program: 

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

S5JB0E4604043

Wiring Diagram
Refer to “DTC U1101: Lost Communication with TCM (Reception Error)”.

DTC Detecting Condition and Trouble Area

DTC Troubleshooting

DTC Detecting Condition

Trouble Area

Steering angle sensor message data is missing from CAN 
communication.

• CAN communication circuit
• Steering angle sensor
• ESP

® control module

Step

Action

Yes

No

1

Was “Electronic Stability Program Check” performed?

Go to Step 2.

Go to “Electronic 
Stability Program 
Check”.

2

DTC check for ESP

®

1) Check DTC for ESP

®.

Is DTC U1126 and DTC U1073 detected together?

Go to “DTC U1073: 
Control Module 
Communication Bus Off 
in Section 4E” for 
troubleshooting.

Go to Step 3.

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?

Go to Step 4.

Check for intermittent 
trouble referring to 
“Intermittent and Poor 
Connection Inspection 
in Section 00 in related 
manual”.

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

®

 control 

module and steering angle sensor opened, shorted or high 
resistance?

Repair or replace the 
CAN communication 
line.

Go to Step 5.

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

®

 control module and 

steering angle sensor) opened, shorted or high resistance?

Go to Step 6.

Repair or replace the 
CAN communication 
line.

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?

Check ESP

® control 

module power and 
ground circuit. If circuits 
are OK, substitute a 
known-good ESP

® 

hydraulic unit / control 
module assembly and 
recheck.

Check applicable 
control module power 
and ground circuit. If 
circuit is OK, substitute 
a known-good 
applicable control 
module and recheck.

Electronic Stability Program:  4F-43

DTC U1139: Lost Communication with 4WD Control Module (Reception Error)

S5JB0E4604044

Wiring Diagram
Refer to “DTC U1101: Lost Communication with TCM (Reception Error)”.

DTC Detecting Condition and Trouble Area

DTC Troubleshooting

DTC Detecting Condition

Trouble Area

4WD control module message data is missing from CAN 
communication. (if equipped 4WD control module)

• CAN communication circuit
• 4WD control module
• ESP

® control module

Step

Action

Yes

No

1

Was “Electronic Stability Program Check” performed?

Go to Step 2.

Go to “Electronic 
Stability Program 
Check”
.

2

DTC check for ESP

®

1) Check DTC for ESP

®.

Is DTC U1139 and DTC U1073 detected together?

Go to “DTC U1073: 
Control Module 
Communication Bus Off 
in Section 4E” for 
troubleshooting.

Go to Step 3.

3

DTC check for 4WD control module
1) Check DTC for 4WD control module.

Is DTC P1073 detected?

Go to “DTC U1073: 
Control Module 
Communication Bus 
Off: Motor-Shift Type 
(Transfer with Shift 
Actuator) in Section 3C” 
for troubleshooting.

Go to Step 4.

4

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 U1139 detected?

Go to Step 4.

Check for intermittent 
trouble referring to 
“Intermittent and Poor 
Connection Inspection 
in Section 00 in related 
manual”.

5

CAN communication circuit check
1) Turn ignition switch to OFF position.
2) Disconnect connectors of ESP

® control module and 

4WD control module communicating by means of CAN.

Is each CAN communication circuit between ESP

®

 control 

module and 4WD control module opened, shorted or high 
resistance?

Repair or replace the 
CAN communication 
line.

Go to Step 6.

6

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

®

 control module and 4WD 

control module) opened, shorted or high resistance?

Go to Step 7.

Repair or replace the 
CAN communication 
line.

4F-44 Electronic Stability Program: 

DTC U1140: Lost Communication with BCM (Reception Error)

S5JB0E4604045

Wiring Diagram
Refer to “DTC U1101: Lost Communication with TCM (Reception Error)”.

DTC Detecting Condition and Trouble Area

DTC Troubleshooting

7

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
• Keyless start control module (if equipped)
• Steering angle sensor

3) Check DTC for ESP

®.

Is DTC U1139 detected?

Check ESP

® control 

module power and 
ground circuit. If circuits 
are OK, substitute a 
known-good ESP

® 

hydraulic unit / control 
module assembly and 
recheck.

Check applicable 
control module power 
and ground circuit. If 
circuit is OK, substitute 
a known-good 
applicable control 
module and recheck.

Step

Action

Yes

No

DTC Detecting Condition

Trouble Area

BCM message data is missing from CAN communication. • CAN communication circuit

• 4WD control module
• ESP

® control module

Step

Action

Yes

No

1

Was “Electronic Stability Program Check” performed?

Go to Step 2.

Go to “Electronic 
Stability Program 
Check”.

2

DTC check for ESP

®

1) Check DTC for ESP

®.

Is DTC U1140 and DTC U1073 detected together?

Go to “DTC U1073: 
Control Module 
Communication Bus Off 
in Section 4E” for 
troubleshooting.

Go to Step 3.

3

DTC check for BCM
1) Check DTC for BCM.

Is DTC U1073 detected?

Go to “DTC U1073 (No. 
1073): Control Module 
Communication Bus Off 
in Section 10B” for 
troubleshooting.

Go to Step 4.

4

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 U1140 detected?

Go to Step 4.

Check for intermittent 
trouble referring to 
“Intermittent and Poor 
Connection Inspection 
in Section 00 in related 
manual”.

5

CAN communication circuit check
1) Turn ignition switch to OFF position.
2) Disconnect connectors of ESP

® control module and 

BCM communicating by means of CAN.

Is each CAN communication circuit between ESP

®

 control 

module and BCM opened, shorted or high resistance?

Repair or replace the 
CAN communication 
line.

Go to Step 6.

Electronic Stability Program:  4F-45

Repair Instructions

Hydraulic Unit Operation Check

S5JB0E4606001

Refer to “Hydraulic Unit Operation Check in Section 4E”.

Sensor Calibration

S5JB0E4606015

CAUTION

!

 

If any DTC(s) other than C1075, C1076, C1077 
or C1078 are detected, sensor calibration can 
not be completed. Repair the detected DTC 
first.

 

NOTE
Steering angle sensor calibration is needed 
when battery, dome fuse or the steering 
angle sensor is removed.
This sensor calibration can be done with/
without SUZUKI Scan Tool.
When ESP

® control module and/or yaw rate / 

G sensor assembly is removed, sensor 
calibration is needed with SUZUKI Scan Tool.

 

Sensor Calibration (Using SUZUKI Scan Tool)

1) Set steering wheel in straight-ahead position.
2) Connect SUZUKI scan tool to data link connector 

(DLC) (1) with ignition switch OFF.

Special tool
(A):  SUZUKI scan tool 

3) Turn ignition switch to ON position and confirm that 

only any of DTC(s) C1075, C1076, C1077 and/or 
C1078 is detected. If any other DTC are detected, 
repair the detected DTC.

4) Park and level the vehicle with parking brake, stop 

engine with ignition switch ON, set steering in 
straight and without stepping on the brake pedal.

CAUTION

!

 

Hold the above condition in Step 4) to 
calibrate sensor correctly until sensor 
calibration is completed.

 

5) Select menu “SENSOR CALIBRATION” under 

“MISC. TEST” mode of SUZUKI scan tool and 
calibrate sensor. Refer to scan tool operator's 
manual for further derails.

6

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

®

 control module and BCM) 

opened, shorted or high resistance?

Go to Step 7.

Repair or replace the 
CAN communication 
line.

7

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 U1140 detected?

Check ESP

® control 

module power and 
ground circuit. If circuits 
are OK, substitute a 
known-good ESP

® 

hydraulic unit / control 
module assembly and 
recheck.

Check applicable 
control module power 
and ground circuit. If 
circuit is OK, substitute 
a known-good 
applicable control 
module and recheck.

Step

Action

Yes

No

(A)

1

I5JB0A450008-01

 

 

 

 

 

 

 

Content   ..  70  71  72  73   ..