Suzuki Grand Vitara JB419. Manual - part 181
Immobilizer Control System: 10C-14
DTC B1709: ECM Communication Error 2
S5JB0BA304026
Wiring Diagram
Refer to “Immobilizer Control System Wiring Circuit Diagram”.
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, ABS control module and/or ESP
®
control
module. If it is detected, perform applicable DTC diag. flow.
Troubleshooting
5
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 connector. Refer to “Intermittent and Poor
Connection Inspection in Section 00 in related manual”.
Is each terminal and wire connection normal?
Go to Step 6.
Repair poor
connection(s).
6
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”.
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 faulty
• ICM faulty
• ECM faulty
Step
Action
Yes
No
1
Diagnostic Trouble Code (DTC) Check
1) Check ECM for DTC referring to “DTC Check in Section
2) Check ABS control module or ESP
®
control module for
DTC. For vehicle equipped with ESP
®
system, refer to
“DTC Check in Section 4F”. For vehicle not equipped
with ESP
®
system, refer to “DTC Check in Section 4E”.
3) Check BCM for DTC referring to “DTC Check in Section
10B in related manual”.
Is any DTC(s) detected?
Go to applicable DTC
diag. flow.
Go to Step 2.
2
Fuse check
1) Check if any fuse is blown.
Is any fuse blown?
Replace blown fuse(s). Go to Step 3.
3
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 in related manual”.
Is each terminal and wire connection normal?
Go to Step 4.
Repair poor
connection(s).