The following background information

244

TM 9-2320-312-24-2

Troubleshooting Section

102-03 Boost Pressure Sensor Open Circuit (25)

102-04 Boost Pressure Sensor Short Circuit (25)

164-03 Injection Actuation Pressure Sensor Open

Circuit (15)

164-04 Injection Actuation Pressure Sensor Short

Circuit (15)

108-03 Atmospheric Pressure Sensor Open

Circuit (26)

108-04 Atmospheric Pressure Sensor Short Circuit

(26)

The following background information is related

to this procedure:

The troubleshooting procedures for the diagnostic

codes of each pressure sensor are identical. The

pressure sensors are sensors that have three

terminals. The pressure sensors are active sensors.

Active sensors require supply voltage from the

ECM. ECM connector J2/P2 terminal 2 supplies + 5

volts to terminal "A" of each sensor. ECM connector

J2/P2 terminal 3 is the common connection for the

pressure sensors. The sensor common connection

is shared between all of the pressure sensors. The

common line is connected to each sensor connector

terminal "B". The signal voltage from terminal "C" of

each sensor is supplied to the appropriate terminal

at ECM connector J2/P2.

g00767035

Illustration 82