Suzuki Wagon R Plus RB310 Service Manual page 320

Troubleshooting
Step
1 Was "Engine and Emission Control System
Check" performed?
2 Battery voltage supply circuit check
1) Disconnect connectors from ECM with igni-
tion switch turned OFF.
2) Remove ECM from vehicle body and then
connect connectors to ECM.
3) While engine running, check voltage
between "E21-16" and ground.
Is voltage 10 – 14 V?
ENGINE GENERAL INFORMATION AND DIAGNOSIS (M13 ENGINE) 6-2-145
Action Yes
Go to Step 2.
Poor "E21-16" connection
or intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection
Inspection" in Section 0A.
If wire and connections
are OK, substitute a
known-good ECM and
recheck.
No
Go to "Engine and Emis-
sion Control System
Check".
"DOME RADIO" fuse
blown "WHT" or "WHT/
BLU" wire circuit open or
short.