Suzuki Ignis Service Manual page 3304

Step
8 Check HO2S–1 heater power circuit.
1) Disconnect connector from ECM with igni-
tion switch turned OFF.
2) Connect connector to HO2S–1 with ignition
switch turned OFF.
3) Measure resistance between "C64-4" wire
and "G91-28" wire terminals of ECM con-
nector.
It resistance below 12 Ω?
Action
[A]: Fig. 1 for Step 7
ENGINE GENERAL INFORMATION AND DIAGNOSIS 6-103
Yes
HO2S–1 heater circuit are
OK.
Substitute a known-good
ECM and recheck.
No
"BLK/WHT" wire high
resistance circuit.