Series 50G/60G Troubleshooting – Section 5.23 PID 106, FMI 4, Flash Code 67, Manifold Absolute Pressure Sensor Input Voltage Low

Section 5.23
PID 106, FMI 4, Flash Code 67, Manifold Absolute Pressure Sensor Input Voltage Low

The Manifold Absolute Pressure (MAP) Sensor input voltage is low due to an open wire or a short.‪

Section 5.23.1
Troubleshooting PID 106, FMI 4, FLASH CODE 67

Troubleshoot as follows:‪

1. Check wire 432 (light green, manifold air pressure) cavity P-1 in the Engine Sensor Harness (ESH) 30–pin connector to see if it is open (see Figure "Engine Sensor Harness 30–pin Connector" ). Also check pin C (manifold air pressure) in the MAP Sensor connector. Repair or replace any open wires, pins, and sockets.
   

   Figure 1. Engine Sensor Harness 30–pin Connector

   1. If the code is still active, go to step .
   2. If the code is no longer active, refer to "5.23.2 Verification" .
2. Check wire 432 (light green, manifold air pressure) cavity P-1 in the ESH 30–pin connector for a short to ground (see Figure "Engine Sensor Harness 30–pin Connector" ). Also check pin C (manifold air pressure) in the MAP Sensor connector. If there is a short, repair or replace the wire(s), pins, and sockets.
   1. If the code is still active, call Detroit Diesel Technical Service.
   2. If the code is no longer active, refer to "5.23.2 Verification" .

Section 5.23.2
Verification

Verify troubleshooting as follows: ‪

1. Check the DDR to see if PID 106, FMI 4, Flash Code 67 is still active.
   1. If the code is still active, go to step 2.
   2. If the code is not active, troubleshooting is complete.
2. If the code is still active, call Detroit Diesel Technical Service.