Briggs & Stratton VANGUARD 810 EFI Repair Manual page 28

24
DTC P0108 Manifold Absolute Pressure (MAP) Sensor
Step
1. Disconnect and reconnect MAP sensor 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 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.
2
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?
1. Turn Ignition OFF.
2. Remove probe from terminal 2, and back probe
terminal 1 (White/Red wire) of MAP sensor con-
3 nector.
3. Turn Ignition ON, Engine OFF.
4. Observe voltage on DVOM.
5. Is reading 0.5-4.5 volts DC?
1 2
Figure 2-14 MAP Sensor Connector.
Non-Scan Diagnostics
Action
4
Section 2: Troubleshooting DTCs
Yes
Go to step 2.
Go to step 3.
Reading is above
EFI wire
harness OK.
No
Problem
corrected.
-
4.5 volts DC.
Replace
MAP sensor.