Suzuki Grand Vitara JB419. Manual - part 180
Immobilizer Control System: 10C-10
Troubleshooting
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
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).
4
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 in related manual”.
Is each terminal and wire connection normal?
Go to Step 5.
Repair poor
connection(s).
5
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 in
related manual”.
Is each CAN communication circuit in good condition?
Go to step 6.
Repair circuit.
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 B1702 is still
detected, substitute a
known-good ECM and
recheck.
Repair power and
ground circuit.