Suzuki Jimny Service Manual page 424

INSPECTION
Step
1 Was "Engine Diag. Flow Table" performed?
2 Check HO2S-2 Heater and Its Circuit.
1) Warm up engine to normal operating tem-
perature.
2) Stop engine.
3) Turn ignition switch ON and check voltage at
terminal E18-4. 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 "R/Bl" wire terminals.
3) If OK, then check heater for resistance.
Is it 11.7 – 14.3 Ω at 20 °C, 68 °F?
Fig. 1 for Step 2
Action
ENGINE GENERAL INFORMATION AND DIAGNOSIS 6-67
Yes
Go to Step 2.
Intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection" in
Section 0A.
"R/Bl" wire open or
shorted to ground or poor
connection at E18-4. If
wire and connection are
OK, substitute a known-
good ECM and recheck.
No
Go to "Engine Diag. Flow
Table".
Go to Step 3.
Replace HO2S-2.