Suzuki Grand Vitara JB416 / JB420 / JB419. Manual — part 546
10C-45 Immobilizer Control System: For Diesel Engine Model
DTC B1709: ECM Communication Error 2
S6JB0AA324026
Wiring Diagram
Refer to “Immobilizer Control System Wiring Circuit Diagram: For Diesel Engine Model”.
Detecting Condition and Trouble Area
NOTE
When DTC B1702 and B1709 are detected at the same time, CAN communication circuit may be faulty.
Check if DTC related to CAN failure is detected by ECM, BCM, keyless start control module (keyless
start model), 4WD control module and/or ABS/ESP
®
control module. If it is detected, perform
applicable DTC diag. flow.
Troubleshooting
7
ICM power and ground circuit check
1) Check power and ground circuit of ICM referring to
“Inspection of Immobilizer Control Module (ICM) and Its
Circuit: For Diesel Engine Model”.
Is power and ground circuit of ICM normal?
Substitute a known-
good ICM and recheck.
If DTC B1708 is still
detected, substitute a
known-good ECM and
recheck.
Repair power and
ground circuit.
Step
Action
Yes
No
Detecting Condition
Trouble Area
Communication error for OBD between ICM and ECM
• CAN communication circuit
• Steering angle sensor (ESP
®
model)
• 4WD control module
• Keyless start control module (if equipped)
• ABS/ESP
®
control module
• Combination meter
• BCM
• ICM
• ECM
Step
Action
Yes
No
1
Was “Immobilizer Control System Check” performed?
Go to Step 2.
Go to “Immobilizer
Control System Check:
For Diesel Engine
Model”.
2
Diagnostic Trouble Code (DTC) Check
1) Check ECM for DTC referring to “DTC Check: For Diesel
2) Check ABS control module or ESP
®
control module for
DTC. For ESP
®
model, refer to “DTC Check in Section
4F”. For non-ESP
®
model, refer to “DTC Check in
3) Check BCM for DTC referring to “DTC Check in Section
Is any DTC(s) detected?
Go to applicable DTC
diag. flow.
Go to Step 3.
3
Fuse check
1) Check if any fuse is blown.
Is any fuse blown?
Replace blown fuse(s). Go to Step 4.
Immobilizer Control System: For Diesel Engine Model 10C-46
DTC B1711: ECM EEPROM Error
S6JB0AA324027
Detecting Condition and Trouble Area
Troubleshooting
1) Clear DTC(s) referring to “Diagnostic Trouble Code (DTC) Clearance: For Diesel Engine Model”.
2) Turn the ignition switch to OFF position.
3) Check if DTC B1711 is still detected referring to “Diagnostic Trouble Code (DTC) Check: For Diesel Engine
Model”. If still detected, go to the next step. If not, the troubleshooting is completed.
4) Substitute a known-good ECM and recheck.
4
ICM connector check
1) With the ignition key at OFF position, disconnect ICM
connector.
2) Check for proper connection at terminals and wires of
ICM connector. Refer to “Intermittent and Poor
Connection Inspection in Section 00”.
Is each terminal and wire connection normal?
Go to Step 5.
Repair poor
connection(s).
5
ECM poor connection check
1) With the ignition key at OFF position, disconnect ECM
connectors.
2) Check for proper connection at terminals and wires of
ECM connectors. Refer to “Intermittent and Poor
Connection Inspection in Section 00”.
Is each terminal and wire connection normal?
Go to Step 6.
Repair poor
connection(s).
6
CAN communication circuit check
1) Check CAN communication circuit between ICM and
ECM for open, short and high resistance. Refer to
“Electrical Circuit Inspection Procedure in Section 00”.
Is each CAN communication circuit in good condition?
Go to step 7.
Repair circuit.
7
ICM check
1) Check power and ground circuit of ICM referring to
“Inspection of Immobilizer Control Module (ICM) and Its
Circuit: For Diesel Engine Model”.
Is power and ground circuit of ICM normal?
Substitute a known-
good ICM and recheck.
If DTC B1709 is still
detected, substitute a
known-good ECM and
recheck.
Repair power and
ground circuit of ICM.
Step
Action
Yes
No
Detecting Condition
Trouble Area
EEPROM in ECM faulty
Internal failure (EEPROM corruption) of ECM
10C-47 Immobilizer Control System: For Diesel Engine Model
DTC B1712: Immobilizer Communication Error
S6JB0AA324028
Wiring Diagram
Refer to “Immobilizer Control System Wiring Circuit Diagram: For Diesel Engine Model”.
Detecting Condition and Trouble Area
NOTE
Troubleshoot DTC B1703 first if both B1703 and B1712 are detected at the same time.
Troubleshooting
Detecting Condition
Trouble Area
Communication error between ICM and ECM
• Related fuse(s) blown
• ICM power and ground circuit
• ECM power and ground circuit
• CAN communication circuit
• Steering angle sensor (ESP
®
model)
• 4WD control module
• Keyless start control module (if equipped)
• ABS/ESP
®
control module
• Combination meter
• BCM
• ICM
• ECM
Step
Action
Yes
No
1
Was “Immobilizer Control System Check” performed?
Go to Step 2.
Go to “Immobilizer
Control System Check:
For Diesel Engine
Model”.
2
DTC check
1) Check ICM for DTC referring to “Diagnostic Trouble
Code (DTC) Check: For Diesel Engine Model”.
Is any DTC detected other than B1712?
Go to applicable DTC
diag. flow.
Go to Step 3.
3
Diagnostic Trouble Code (DTC) Check
1) Check ECM for DTC referring to “DTC Check: For Diesel
2) Check ABS control module or ESP
®
control module for
DTC. For ESP
®
model, refer to “DTC Check in Section
4F”. For non-ESP
®
model, refer to “DTC Check in
3) Check BCM for DTC referring to “DTC Check in Section
Is any DTC(s) detected?
Go to applicable DTC
diag. flow.
Go to Step 4.
4
Fuse check
1) Check if any fuse is blown.
Is any fuse blown?
Replace blown fuse(s). Go to Step 5.
Immobilizer Control System: For Diesel Engine Model 10C-48
5
ICM connector check
1) With the ignition key at OFF position, disconnect ICM
connector.
2) Check for proper connection at terminals and wires of
ICM connector. Refer to “Intermittent and Poor
Connection Inspection in Section 00”.
Is each terminal and wire connection normal?
Go to Step 6.
Repair poor
connection(s).
6
ECM connector check
1) With the ignition key at OFF position, disconnect ECM
connectors.
2) Check for proper connection at terminals and wires of
ECM connectors. Refer to “Intermittent and Poor
Connection Inspection in Section 00”.
Is each terminal and wire connection normal?
Go to Step 7.
Repair poor
connection(s).
7
CAN communication circuit check
1) Check CAN communication circuit between ICM and
ECM for open, short and high resistance. Refer to
“Electrical Circuit Inspection Procedure in Section 00”.
Is each CAN communication circuit in good condition?
Go to Step 8.
Repair circuit.
8
ICM power and ground circuit check
1) Check power and ground circuit of ICM referring to
“Inspection of Immobilizer Control Module (ICM) and Its
Circuit: For Diesel Engine Model”.
Is power and ground circuit of ICM normal?
Substitute a known-
good ICM and recheck.
If DTC B1702 is still
detected, substitute a
known-good ECM and
recheck.
Repair power and
ground circuit.
Step
Action
Yes
No
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