Suzuki Ignis Service Manual page 3285

6-84 ENGINE GENERAL INFORMATION AND DIAGNOSIS
Step
7 Check ECT sensor ground circuit.
1) Connect connectors to ECM.
2) Check for proper connection of ECT sensor
connector at "ORN" wire terminal.
3) Measure resistance between "ORN" wire
terminal of ECT sensor connector and vehi-
cle body ground.
Is resistance below 5 Ω?
8 Check ECT sensor ground circuit.
1) Measure resistance between "C63-28" ter-
minal of ECM connector and vehicle body
ground.
Is resistance below 5 Ω?
9 Check ECT sensor according to "Engine cool-
ant temperature sensor (ECT sensor) inspec-
tion" in Section 6E1.
Is it in good condition?
Action
[A]: Fig. 1 for Step 3
Yes
Go to Step 9.
"ORN" wire open circuit or
high resistance circuit.
Poor "C63-28" connec-
tion.
Substitute a known-good
ECM and recheck.
No
Go to Step 8.
Faulty ECM ground cir-
cuit.
If circuit are OK, substi-
tute a known-good ECM
and recheck.
Replace ECT sensor.