Fuel Injector Circuit Check - Suzuki Liana RH418 Supplementary Service Manual

1A-85 Engine General Information and Diagnosis:

Fuel Injector Circuit Check

Wiring Diagram
Troubleshooting
Step
1 Check injector for operating sound
1) Using sound scope, check each injector for operating
sound at engine cranking.
Do all 4 injector make operating sound?
2 Does none of 4 injectors make operating sound at Step 1?
3 Check power circuit of injectors for open and short
Is it normal?
+B
1
BLU/YEL
BLK/RED 2
BLU/WHT
3
BLU/RED
4
BLU/GRN
C41 (31P)
9 8 7 6 5 4 3 2
21 20 19 18 17 16 15 14 13 12 11
31 30 29 28 27 26 25 24 23
1. No.1 injector
2. No.2 injector
Action
C41-9
C41-21
C41-31
C41-8
G04 (24P)
1
7 6 5 4 3 2 1
10
16 15 14 13 12 11 10 9 8
22 24 23 22 21 20 19 18 17
3. No.3 injector
4. No.4 injector
Furl injector circuit is in
good condition.
Go to Step 3.
Check all 4 injectors for
resistance respectively.
If resistance is OK,
substitute a known-
good ECM and recheck.
ECM
G03 (17P)
6 5 4 3 2 1
12 11 10 9 8 7
17 16 15 14 13
Yes
Go to Step 2.
Check coupler
connection and wire
harness of injector not
making operating sound
and injector itself.
Power circuit open or
short.
S3RH0B1104045
I2RH0B110078-01
No