Briggs & Stratton VANGUARD 810 EFI Repair Manual page 22

18
Step
1. Disconnect and reconnect O
(Black) connectors.
2. Turn Ignition ON, Engine OFF.
1
3. Clear codes.
4. Turn Ignition OFF, and then back ON.
5. Does DTC return?
1. Turn Ignition OFF.
2. Back probe (using fused patch cord) terminal B
(White/Green wire) on engine side of O
nector.
3. Connect terminal B back probe to red meter test lead
on DVOM.
4. Back probe terminal D (Brown wire) on engine side of
2
O sensor connector.
2
5. Connect terminal D back probe to black meter test
lead on DVOM.
6. Set DVOM to read volts DC.
7. Turn Ignition ON, Engine OFF.
8. Observe voltage on DVOM.
9. Is reading 12.2-13.5 volts DC?
1. Start and run engine.
2. Observe voltage on DVOM.
3. Within 15 seconds, does voltage reading drop to less
3
than 100 millivolts?
A B
B
Figure 2-9 O Sensor Connector.
2
DTC P0032 Oxygen Sensor (HO
Scan and Non-Scan Diagnostics
Action
sensor and ECM J2
2
C D
D
Section 2: Troubleshooting DTCs
2
Go to step 2.
sensor con-
2
Go to step 3.
O
2
Clear codes and
) Heater
Yes
Problem
corrected.
Ensure probe
connectivity.
sensor OK.
Replace
O
retest.
No
sensor.
2