Suzuki Wagon R Manual page 399

6-60 ENGINE DIAGNOSIS
INSPECTION
STEP
1 Was "ENGINE DIAG. FLOW TABLE" performed?
2 Check Heater for Operation.
1) Check voltage at terminal E21-7. See Fig. 1.
2) Warm up engine to normal operating temperature.
3) Stop engine.
4) Turn ignition switch ON and Check voltage at
terminal E21-7. See Fig. 1. 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 are specified?
3 Check Heater of Sensor-1.
1) Disconnect HO2S-1 coupler with ignition switch
OFF.
2) Check for proper connection to HO2S-1 at "B/W"
and "Y" wire terminals.
3) If OK, then check heater resistance. See Fig. 2.
Is it 11.7 – 15.6 Ω at 20_C, 68_F?
Fig. 1 for Step 2
E21-7
ACTION
Fig. 2 for Step 3
YES
Go to Step 2.
Intermittent trouble
Check for intermittent
referring to
"Intermittent and
Poor Connection"
in Section 0A.
"Y" wire open or
shorted to ground or
poor connection at
E21-7. If wire and
connection are OK,
substitute a
known-good ECM
and recheck.
NO
Go t o"ENGINE DIAG.
FLOW TABLE".
Go to Step 3.
Replace HO2S-1.