Suzuki Wagon R Plus RB310 Service Manual page 304

Step
7 Check Relay Circuit
1) Turn ignition switch to OFF position.
2) Disconnect connectors from ECM.
3) Remove radiator fan relay from relay box.
4) Check for proper connection to "E21-4" wire
terminal of ECM connector and "BLU" wire
terminal of radiator fan relay connector.
5) If OK, measure resistance between "E21-4"
wire terminal of ECM connector and "BLU"
wire terminal of radiator fan relay connector.
Ω
Is resistance 1
8 Check Relay Circuit
1) Measure resistance between "E21-4" wire
terminal of ECM connector and vehicle
body ground.
Is it infinite?
9 Check Radiator Fan Relay
1) Check radiator fan relay referring to "Main
Relay, Fuel Pump Relay and Radiator Fan
Relay Inspection" in Section 6E2.
Is it in good condition?
[A] 1
Action
or less?
ENGINE GENERAL INFORMATION AND DIAGNOSIS (M13 ENGINE) 6-2-129
Yes
Go to Step 8.
Go to Step 9.
System is in good condi-
tion.
Intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection
Inspection" in Section 0A.
[A]: Fig. 1 for Step 2
1. Radiator fan relay
No
"BLU" wire in open or high
resistance circuit.
"BLU" wire shorted to
ground circuit.
Replace radiator fan relay.