Suzuki SY413 Service Manual page 2665

6-1-66 ENGINE GENERAL INFORMATION AND DIAGNOSIS (G13/G16 ENGINE WITH WU TWC)
INSPECTION
STEP
1 Was "ENGINE DIAG. FLOW TABLE" performed?
2 Check HO2S-2 Heater and Its Circuit.
1) Warm up engine to normal operating temperature.
2) Stop engine.
3) Turn ignition switch ON and check voltage at termi-
nal E92-4. See Fig. 1. Voltage should be over 10 V.
4) Start engine, run it at idle and check voltage at the
same terminal after 1 min. from engine start.
Voltage should be below 1.9 V.
Are check result as specified?
3 Check Heater or Sensor-2.
1) Disconnect HO2S-2 coupler with ignition switch
OFF.
2) Check for proper connection to HO2S-2 at "B / W"
and "Lg / B" wire terminals.
3) If OK, then check heater resistance.
Is it 5.0 – 6.4 W at 20_C, 68_F?
Fig.1 for Step 2
ACTION YES
Go to Step 2.
Intermittent trouble.
Check for intermittent
referring to "Intermit-
tent and Poor Connec-
tion" in Section 0A.
"Lg / B" wire open or
shorted to ground or
poor connection at
E92-4. If wire and con-
nection are OK, substi-
tute a known-good
ECM (PCM) and re-
check.
NO
Go to "ENGINE DIAG.
FLOW TABLE".
Go to Step 3.
Replace HO2S-2.