Engine Temperature Sensor Open or Short Circuit

TM 9-2320-312-24-2

Troubleshooting Section

i01857895

Engine Temperature Sensor

Open or Short Circuit - Test

SMCS Code: 1906-081; 1917-081; 1922-081;

1928-081

System Operation Description:

Use this procedure under the following situation:

Use this procedure to troubleshoot the system only

when there is an active diagnostic code or when

a diagnostic code can easily be activated. This

procedure covers open circuit diagnostic codes and

short circuit diagnostic codes that are associated

with the following sensors:

coolant temperature sensor

g00767354

air inlet temperature sensor

Illustration 94

Use this procedure for the following Diagnostic

Codes:

105-03 Inlet Manifold Temp Sensor Open Circuit

(38)

105-04 Inlet Manifold Temp Sensor Short Circuit

(38)

110-03 Coolant Temp Sensor Open Circuit (27)

110-04 Coolant Temp Sensor Short Circuit (27)

The following background information is related

to this procedure:

The troubleshooting procedures for the diagnostic

codes of each temperature sensor are identical. The

temperature sensors are passive sensors that have

two terminals. The passive sensors do not require

supply voltage from the ECM. ECM connector

J2/P2 terminal 18 is the common connection for the

engine temperature sensors. The sensor common

connection is shared between all of the temperature

sensors. The common line is connected to each

sensor connector terminal 2. Terminal 1 is the

sensor output. The signal from terminal 1 of each

sensor is supplied to the appropriate terminal at

ECM connector J2/P2.