Suzuki Liana RH413, Service Manual

Page: 189 / 1302

Engine General Information and Diagnosis: 1A-138
Generator Control Signal Circuit Check
S3RH0A1104075
Wiring Diagram
Circuit Description
ECM sends signal (0 – 1 V) to generator terminal C to suspend charging during vehicle take off or fast acceleration.
Troubleshooting
ECM
RED/BLU
12V
C41 (31P) G04 (24P) G03 (17P)
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20 21
22 23 24 25 26 28 27 29 30 31
5 6 1 2 3 4 5 6 7
11 12
9 10 11 13 12 14 15 16
16 17
1 2
7 8
13 14
3 4
9 10
15 17 18
8
19 20 21 22 23 24
C C41-12
1
GEN
I2RH0B110090-01
1. Generator
Step Action Yes No
1 Check generator control signal circuit
1) Check voltage at terminal “C41-12” under each condition
given as follows (vehicle at stop).
Voltage at terminal “C41-12”
While engine running: 10 – 14 V
While engine running at 2000 rpm or less and
throttle valve is not totally closed: 0 – 1 V
Is check result satisfactory?
Generator control signal
circuit is in good
condition. “RED/BLU” wire open or
short. Poor “C41-12”
terminal connection.
If wire and connection
are OK, substitute a
known-good ECM and
recheck.