Suzuki GRAND VITARA JB416, Service Manual

Page: 304 / 474

4F-41 Electronic Stability Program:
DTC Detecting Condition and Trouble Area
DTC Troubleshooting
DTC Detecting Condition Trouble Area
TCM message data is missing from CAN communication.
(for A/T model) • CAN communication circuit
• TCM
• 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 U1101 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 TCM
1) Check DTC for TCM.
Is DTC P1774 detected?
Go to “DTC P1774:
CAN Communication
Bus Off: in Section 5A”
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 U1101 detected?
Go to Step 5. 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
TCM communicating by means of CAN.
Is each CAN communication circuit between ESP
®
control
module and TCM 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 TCM)
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
• BCM
• 4WD control module (if equipped)
• Keyless start control module (if equipped)
• Steering angle sensor
3) Check DTC for ESP
®
.
Is DTC U1101 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.