Suzuki Wagon R Manual page 1171

INSPECTION
STEP
1 Was "ENGINE DIAG. FLOW TABLE" performed?
2 Check Radiator Cooling Fan Relay and Its Circuit.
1) Turn ignition switch ON.
2) Check for voltage at terminal E21-20 of ECM
(PCM) connector connected, under following
condition. See Fig. 1.
When engine coolant temp. is lower than
91_C, 196_F and A/C switch turns OFF:
10 – 14 V
Is voltage as specified?
3 Check Radiator Fan Control Relay.
1) Turn ignition switch OFF and remove radiator
fan relay.
2) Check for proper connection to the relay at
"BLK/RED" and "BLU" wire terminals.
3) If OK, then measure resistance between
terminals a and b. See Fig. 2.
Is it 100 – 120 Ω?
Fig. 1 for Step 2
ACTION
GENERAL INFORMATION AND ENGINE DIAGNOSIS 6-1-79
YES
Go to Step 2.
Intermittent trouble or
faulty ECM (PCM).
Check for intermittent
referring to "Intermittent
and Poor Connection"
in Section 0A.
"BLK/RED" or "BLU"
circuit open or short.
If wires and connections
are OK, substitute a
known-good ECM (PCM)
and recheck.
Fig. 2 for Step 3
Radiator fan Relay
NO
Go to "ENGINE DIAG.
FLOW TABLE".
Go to Step 3.
Replace radiator fan
relay.