Suzuki Liana RH413, Service Manual

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10C-17 Immobilizer Control System:
DTC Troubleshooting
NOTE
• After replacing with a known-good ECM, register ECM/Immobilizer Control Module (ECU) code in
ECM by performing procedure described in “Procedure after ECM Replacement”.
• After replacing with a known-good Immobilizer Control Module, register ECM/Immobilizer Control
Module (ECU) code in ECM and Transponder code and ECM/Immobilizer Control Module (ECU) code
in Immobilizer Control Module by performing procedure described in “Procedure after Immobilizer
Control Module Replacement”.
Step Action Yes No
1 Check voltage between Immobilizer Control Module (1)
coupler terminal “G45-1” and body ground with ignition
switch turned ON.
Is it 4 – 5 V?
Go to Step 2. “YEL” wire short
2 1) Disconnect ECM coupler with ignition switch turned OFF.
Is there continuity between Immobilizer Control Module
coupler (1) terminal “G45-1” and serial data link terminal
(“G07-8”) of ECM coupler? (For positions of data link
connector terminal of ECM coupler, refer to “Immobilizer
Control System Wiring Circuit Diagram”.)
Poor “G45-1” terminal
connection (Immobilizer
Control Module) or poor
data link connector
terminal connection
(ECM)
If connections are OK,
substitute a known-
good ECM or
Immobilizer Control
Module and recheck.
See NOTE. “YEL” wire between
Immobilizer Control
Module and ECM open
I3RH0AA30023-01
I3RH0AA30024-01