Suzuki Liana RH413, Service Manual

Page: 1295 / 1302

Immobilizer Control System: 10C-16
DTC Troubleshooting
NOTE
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”.
DTC 23 / 83 (P1621): No ECM/Immobilizer Control Module Code Transmitted or DLC Circuit Opened/
Shorted
S3RH0AA304014
Wiring Diagram
Description
• DTC 23
When the ignition switch is turned to ON position, Immobilizer Control Module requests ECM to transmit ECM/
Immobilizer Control Module (ECU) code. If ECM/Immobilizer Control Module (ECU) code is not transmitted from
ECM, Immobilizer Control Module sets this DTC.
• DTC 83 (P1621)
When the ignition switch is turned to ON position, ECM requests Immobilizer Control Module to transmit ECM/
Immobilizer Control Module (ECU) code. If ECM/Immobilizer Control Module (ECU) code is not transmitted from
Immobilizer Control Module, ECM sets this DTC.
Step Action Yes No
1 Check voltage between Immobilizer Control Module (1)
coupler terminal “G45-2” and body ground with ignition
switch turned ON.
Is it 10 – 14 V?
Poor “G45-2” terminal
connection
If connection is OK,
substitute a known-
good Immobilizer
Control Module and
recheck. See NOTE. “BLK/WHT” wire open
or short
I3RH0AA30021-01
YEL
G45-1 G07-8
YEL
YEL
4
3 1
2
I3RH0AA30022-01
1. Immobilizer Control Module 3. ECM
2. Coil antenna 4. To data link connector (9th pin)