Dtc B1711: Ecm Eeprom Error; Dtc B1712: Immobilizer Communication Error - Suzuki GRAND VITARA 2005 Service Manual

10C-15 Immobilizer Control System:
Step
4 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 in related manual".
Is each terminal and wire connection normal?
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?
6 ICM 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?

DTC B1711: ECM EEPROM Error

Detecting Condition and Trouble Area
Detecting Condition
EEPROM in ECM faulty
Troubleshooting
1) Clear DTC(s) referring to "Diagnostic Trouble Code (DTC) Clearance: ".
2) Turn the ignition switch to OFF position.
3) Check if DTC B1711 is still detected referring to "Diagnostic Trouble Code (DTC) Check: ". If still detected, go to
the next step. If not, the troubleshooting is completed.
4) Substitute a known-good ECM and recheck.

DTC B1712: Immobilizer Communication Error

Wiring Diagram
Refer to "Immobilizer Control System Wiring Circuit Diagram: ".
Detecting Condition and Trouble Area
Detecting Condition
Communication error between ICM and ECM
NOTE
Troubleshoot DTC B1703 first if both B1703 and B1712 are detected at the same time.
Action Yes
Go to Step 5.
Go to step 6.
Substitute a known-
good ICM and recheck.
If DTC B1709 is still
detected, substitute a
known-good ECM and
recheck.
Trouble Area
Internal failure (EEPROM corruption) of ECM
Trouble Area
• Related fuse(s) blown
• ICM power and ground circuit faulty
• ECM power and ground circuit faulty
• CAN communication circuit faulty
• ICM faulty
• ECM faulty
No
Repair poor
connection(s).
Repair circuit.
Repair power and
ground circuit of ICM.
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