Briggs & Stratton VANGUARD 810 EFI Repair Manual page 48

44
DTC P0132 Heated Oxygen (HO
Step
1. Disconnect and reconnect HO
and ECM J2 (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 terminal C (Grey/Black wire)
of HO sensor connector.
2
3. Connect terminal C back probe to red
meter test lead on DVOM.
4. Back probe terminal D (Brown wire) of
HO sensor connector.
2
2
5. Connect terminal D back probe to black
meter test lead on DVOM.
6. Set DVOM to read volts DC.
7. Start and run engine for at least 2 min-
utes.
8. With engine running, observe voltage on
DVOM.
9. Is reading 600 – 950 millivolts DC?
1. Turn Ignition OFF.
2. Remove probe from terminal C, and back
probe ECM connector terminal J2-17.
3. Start and run engine.
3
4. Observe voltage on DVOM.
5. Is reading 600–950 millivolts DC?
A B C
C D
Figure 2-32 HO Sensor Connector.
2
Non-Scan Diagnostics
Action
sensor
2
D
Yes
Go to step 2.
HO sensor OK.
2
HO sensor OK.
2
1
10
Figure 2-33 ECM J2 Connector (Black).
Section 2: Troubleshooting DTCs
) Sensor
2
Problem
corrected.
Go to step 3.
Verify that both HO
and ECM J2 connectors
are fully mated.
NOTE: If reading is above
950 millivolts DC, replace HO
sensor or identify overly rich
running condition.
9
18
J2-17
No
sensor
2
2