Briggs & Stratton BIG BLOCK EFI, Repair Manual

Page: 28 / 142

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