Suzuki Intruder VZ1500 Service Manual page 152

1A-85 Engine General Information and Diagnosis:
Step
2 1) Connect the HO2 sensor coupler.
2) Insert the needle pointed probes to the lead wire coupler.
3) Turn the ignition switch ON and measure the heater
voltage between the W/B wire and ground.
If the tester voltage indicates the battery voltage, it is
good condition.
NOTE
Battery voltage can be detected only before
starting the engine.
Special tool
(A): 09900–25008 (Multi-circuit tester set)
(B): 09900–25009 (Needle pointed probe set)
Tester knob indication
Voltage ( )
Heater voltage
Battery voltage
((+) terminal: B/R – (–) terminal: Ground)
Is the voltage OK?
Action
(A)
(B)
Yes
• B/G or B/R wire open
or shorted to the
ground, or poor "17"
connection.
• Recheck each
terminal and wire
harness for open
circuit and poor
connection.
• If wire and
connection are OK,
intermittent trouble or
faulty ECM.
• Replace the ECM
with a known good
one, and inspect it
again. Refer to "ECM
Removal and
Installation in Section
1C (Page 1C-1)".
I940H1110079-02
No
• Open or short circuit
in the B/R wire or B/G
wire.
• Loose or poor
contacts on the ECM
coupler or HO2
sensor coupler.