Dtc P0108 Signal Voltage High (Non-Scan Diagnostics) - Briggs & Stratton VANGUARD M490000 Repair Manual

DTC P0108 Signal Voltage High (Non-Scan Diagnostics)

Step
1 1. Disconnect and reconnect MAP 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?
2 1. Turn Ignition OFF.
2. Back probe terminal 2 (Red/White wire) of MAP sensor
connector.
3. Connect terminal 2 back probe to red meter test lead on DVOM.
4. Back probe terminal 4 (Brown wire) of MAP sensor connector.
5. Connect terminal 4 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 4.7-5.0 volts DC?
3 1. Turn Ignition OFF.
2. Remove probe from terminal 2, and back probe terminal 1
(White/Red wire) of MAP sensor connector.
3. Turn Ignition ON, Engine OFF.
4. Observe voltage on DVOM.
5. Is reading 0.5-4.5 volts DC?
MAP Sensor Connector
Action Yes
Go to step 2.
Go to step 3.
EFI wire harness OK.
No
Problem corrected.
2
-
Reading is above
4.5 volts DC.
Replace MAP sensor.
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