Briggs & Stratton VANGUARD M490000, Repair Manual

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2
19
DTC P0032 Signal Voltage High (Non-Scan Diagnostics)
Step Action Yes No
1 1. Disconnect and reconnect O
2
sensor and ECM J2 (Black)
connectors.
2. Turn Ignition ON, Engine OFF.
3. Clear codes.
4. Turn Ignition OFF, and then back ON.
5. Does DTC return?
Go to step 2. Problem corrected.
2 1. Turn Ignition OFF.
2. Back probe (using fused patch cord) terminal B (White/Green
wire) on engine side of O
2
sensor connector.
3. Connect terminal B back probe to red meter test lead on DVOM.
4. Back probe terminal D (Brown wire) on engine side of O
2
sensor
connector.
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?
Go to step 3. Ensure probe
connectivity.
3 1. Start and run engine.
2. Observe voltage on DVOM.
3. Within 15 seconds, does voltage reading drop to less than 100
millivolts?
O
2
sensor OK.
Clear codes and retest.
Replace O
2
sensor.
O
2
Sensor Connector
Not for
Reproduction