Suzuki AN650/A Supplementary Service Manual page 27

26 AN650A/K7 ('07-MODEL)
Step 2 (When indicating C44/P0135:)
1) Connect the HO2 sensor coupler.
2) Insert the needle pointed probe to the HO2 sensor coupler.
3) Turn the ignition switch ON and measure the heater voltage
between B (O/W) wire and ground.
4) If the tester voltage indicates the battery voltage, it is good
condition.
$ Heater voltage: Battery voltage
NOTE:
Battery voltage can be detected only before starting the engine.
! 09900-25008: Multi-circuit tester set
09900-25009: Needle pointed probe set
' Tester knob indication: Voltage (()
Is the voltage OK?
• O/W or B wire open or shorted to ground, or
poor \ connection.
• Recheck each terminal and wire harness for
open circuit and poor connection.
YES
• If wire and connection are OK, intermittent trou-
ble or faulty ECM.
• Replace the ECM with a known good one, and
inspect it again.
• Open or short circuit in the Y/W wire or O/W
wire.
NO
• Loose or poor contacts on the ECM coupler
(Terminal \) or HO2 sensor coupler.
5) After repairing the trouble, clear the DTC using SDS tool.
(Refer to the SDS operation manual for further details.)
(+ B – - Ground)
2
V
2
ECM coupler (Harness side)