Suzuki Grand Vitara XL-7 Service Manual page 148

TABLE A-3
INSPECTION
STEP
1 Double Relay Operating Sound Check:
Is operating sound of double relay heard at ignition
switch ON?
2 Fuse Check:
Is main "FI" fuse in good condition?
3 Double Relay Check:
1) Turn OFF ignition switch and remove double
relay.
2) Check for proper connection to double relay at
terminal 3 and 10.
3) If OK, check double relay referring to "Double
Relay Inspection" in Section 6E3.
Is check result satisfactory?
4 ECM (PCM) Power Circuit Check:
1) Turn OFF ignition switch, disconnect connectors
from ECM (PCM) and install main relay.
2) Check for proper connection to ECM (PCM) at
terminals E227-11, E228-24, E228-1 and
E228-2.
3) If OK, then measure voltage between terminal
E227-11 and ground, E228-24 and ground with
ignition switch ON.
Is each voltage 10 – 14 V?
5 ECM Power Circuit Check:
1) Using service wire, ground terminal E228-24 and
measure voltage between terminal E228-1 and
ground, E228-2 and ground at ignition switch ON.
Is it 10 – 14 V?
6 Is operating sound of double relay heard in Step 1?
7 Double Relay Check:
1) Check double relay according to procedure in
Step 3.
Is main relay in good condition?
ENGINE DIAGNOSIS (RHZ ENGINE WITH TRIPLE-CONNECTOR ECM) 6-1-9
ACTION YES
Go to Step 5.
Go to Step 3.
Go to Step 4.
Go to Step 5.
Check ground circuits
"BLK" for open.
If OK, then substitute a
known-good ECM
(PCM) and recheck.
Go to Step 7.
"WHT /YEL" or
"BLU/BLK" wire open.
NO
Go to Step 2.
Check for short in
circuits connected to
this fuse.
Replace main relay.
"BLK/WHT",
"YEL/GRN" or
"WHT /YEL" circuit
open.
Go to Step 6.
"WHT /YEL" or
"BLU/BLK" wire open
Replace double relay.