Suzuki GA413, Service Manual

Page: 435 / 1246

ENGINE AND EMISSION CONTROL SYSTEM 6E-25
STEP ACTION YES NO
3 1) Stop engine.
2) With ignition switch OFF position, disconnect
ECM electrical connectors and oxygen sensor
electrical connector.
3) Check “R” and “Bl” wires for open or short.
Are “R” and “Bl” wires in good condition?
Go to Step 4. Repair or replace.
4 1) Substitute a known-good oxygen sensor. Refer
to “Oxygen Sensor Removal and Installation”.
2) Connect ECM electrical connectors and oxygen
sensor electrical connector.
3) Install SUZUKI scan tool.
4) Start engine.
5) Run engine to normal operating temperature.
6) Maintain engine speed at 2000RPM for 60 se-
conds.
7) Using data list function of SUZUKI scan tool,
monitor oxygen sensor output voltage “02S”
with engine running at 2000RPM.
Does voltage switch below and above 0.55V?
Faulty oxygen sensor. Poor connection of ECM
connector terminal or ox-
ygen sensor connector
terminal.
If OK, substitute a
known-good ECM and
recheck.
NOTE:
Upon completion of inspection and repair work, perform “DTC Confirmation Procedure” in this section and
confirm that the trouble has been corrected.
Fig. for Step 2, 4