Suzuki Liana RH413, Service Manual

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Immobilizer Control System: 10C-18
Inspection of ECM, Immobilizer Control Module and Its Circuit
S3RH0AA304015
ECM, Immobilizer Control Module and its circuit can be checked at ECM wiring couplers and Immobilizer Control
Module wiring coupler by measuring voltage. Described here is only inspection procedure of Immobilizer Control
Module. For inspection procedure of ECM, refer to “Inspection of ECM and Its Circuits in Section 1A”.
CAUTION
!
Immobilizer Control Module cannot be checked by itself. It is strictly prohibited to connect voltmeter or
ohmmeter to Immobilizer Control Module with coupler disconnected from it.
Voltage Check
1) Remove Immobilizer Control Module (1) from steering lock assembly with ignition switch OFF referring to
“Immobilizer Control Module Removal and Installation”.
2) Connect Immobilizer Control Module coupler (2) to Immobilizer Control Module.
3) Check voltage at each terminal of coupler connected.
NOTE
As each terminal voltage is affected by the battery voltage, confirm that it is 11 V or more when ignition
switch is ON.
3. Body ground
Terminal Circuit Normal voltage Condition
G45-1 Data link connector (Serial data terminal) 4 – 5 V Ignition switch ON
G45-2 Ignition signal
10 – 14 V Ignition switch ON
0 – 0.8 V Ignition switch OFF
G45-3 Power source 10 – 14 V Ignition switch ON
G45-4 — — —
G45-5 Ground — —
I3RH0AA30025-01