Suzuki Liana RH413, Service Manual

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1A-65 Engine General Information and Diagnosis:
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 terminal
“G04-4”.
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?
Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”. Go to Step 3.
3 Check heater of sensor-2
1) Disconnect HO2S-2 coupler with ignition switch OFF.
2) Check for proper connection to HO2S-2 at “BLK”, “BLK/
WHT” and “PNK/BLU” wire terminals.
3) If OK, then check heater resistance.
Is it 11.7 – 14.3
Ω
at 20
°
C, 68
°
F?
“PNK/BLU” wire open or
shorted to ground or
poor connection at
“G04-4”.
If wire and connection
are OK, substitute a
known-good ECM and
recheck. Replace HO2S-2.
Step Action Yes No
I2RH0B110036-01