Suzuki Liana RH418, Supplementary Service Manual

Page: 70 / 371

1A-57 Engine General Information and Diagnosis:
DTC Troubleshooting
Step Action Yes No
1 Was “Engine and Emission Control System Check”
performed? Go to Step 2. Go to “Engine and
Emission Control
System Check”.
2 Check heater for operation
1) Check voltage at terminal “C41-7”.
2) Warm up engine to normal operating temperature.
3) Stop engine.
4) Turn ignition switch ON and check voltage at terminal
“C41-7”.
Voltage should be over 10 V.
5) Start engine, run it at idle and check voltage at the same
terminal.
Voltage should be below 1.9 V.
Are check results specified ones?
Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section 00
in related manual” Go to Step 3.
3 Check heater of sensor-1
1) Disconnect HO2S-1 coupler with ignition switch OFF.
2) Check for proper connection to HO2S-1 at “BLK”, “BLK/
WHT” and “PNK/BLK” wire terminals.
3) If OK, then check heater resistance.
It is 5.0 – 6.4
Ω
at 20
°
C, 68
°
F?
“PNK/BLK” wire open or
shorted to ground or
poor connection at
“C41-7”.
If wire and connection
are OK, substitute a
known-good ECM and
recheck. Replace HO2S-1.
I2RH0B110033-01
I2RH01110085-01