Suzuki Jimny Service Manual page 404

Step
3 Fuse Check
Is main "FI" fuse in good condition? See Fig. 1.
4 ECM Power Circuit Check
1) Turn OFF ignition switch, disconnect connectors from ECM and
install main relay.
2) Check for proper connection to ECM at terminals E17-9 (Case of
TYPE A) (See NOTE) or E18-11 (Case of TYPE B) (See NOTE),
E18-10, E18-5 and E18-6.
3) If OK, then measure voltage between terminal E18-10 and ground,
E17-9 (Case of TYPE A) (See NOTE) or E18-11 (Case of TYPE B)
(See NOTE) and ground with ignition switch ON.
Is each voltage 10 – 14 V?
5 ECM Power Circuit Check
1) Using service wire, ground terminal E18-10 and measure voltage
between terminal E18-5 and ground at ignition switch ON.
Is it 10 – 14 V?
6 Is operating sound of main relay heard in Step 1?
7 Main Relay Check
1) Check main relay according to procedure in Step 2.
Is main relay in good condition?
[A] Fig. 1 for Step 2 and 3 / [B] Fig. 2 for Step 2 / [C] Fig. 3 for Step 2
2. "F1" fuse
Action
ENGINE GENERAL INFORMATION AND DIAGNOSIS 6-47
Yes
Go to Step 4. Check for
Go to Step 5. "B/W", "Or" or
Check
ground cir-
cuits "B" and
"B/R" for
open.
If OK, then
substitute a
known-good
ECM and
recheck.
Go to Step 7. "Bl/B" or "B/
"Or" or "Bl/B"
wire open.
No
short in cir-
cuits con-
nected to this
fuse.
"Bl/B" circuit
open.
Go to Step 6.
R" wire open.
Replace main
relay.