0110-04 Coolant Temp Sensor Short Circuit (27)

121

TM 9-2320-312-24-2

Troubleshooting Section

Troubleshooting:

System Response:

Perform the following diagnostic procedure: "Engine

Electronic System Response Coolant temperature

Temperature Sensor Open or Short Circuit - Test"

is set to 90 C (194 F) while the diagnostic code

is active. Cold Mode is disabled. If the ECM is

controlling the cooling fan, the fan will be ON.

Results:

OK STOP.

Service Tool Display or Lamps Caterpillar

Electronic Technician (ET) will indicate 90 C

(194 F) and display "DIAG" next to "Engine

i01600207

Coolant Temperature" on the status screen while the

0110-11 Very High Coolant

diagnostic code is active. The Check Engine Lamp

will NOT illuminate unless this diagnostic code has

Temperature (61)

been continuously active for 10 hours.

SMCS Code: 1906-038

Engine Response Occasionally, the engine may

emit white smoke on start-up because Cold Mode

Conditions Which Generate This Code:

is not active.

The engine has been running for at least 30

Troubleshooting:

seconds.

Perform the following diagnostic procedure: "Engine

The diagnostic codes for the coolant temperature

Temperature Sensor Open or Short Circuit - Test"

are not active.

Results:

The coolant temperature is equal to 111 C (232 F)

or above 111 C (232 F). For emergency vehicles,

OK STOP.

the coolant temperature is equal to 116 C (241 F)

or above 116 C (241 F).

i01638815

"Engine Monitoring" must be programmed to

0110-04 Coolant Temp Sensor

"WARNING", "DERATE", or "SHUTDOWN" before

Short Circuit (27)

this diagnostic code can occur.

Note: This diagnostic code represents an event. This

SMCS Code: 1408-081; 1906-038

diagnostic code does not represent an electronic

system fault.

Conditions Which Generate This Code:

The coolant temperature signal voltage is below the

System Response:

acceptable range.

Electronic System Response For "Engine

Monitoring" that is programmed to "DERATE" or

System Response:

"SHUTDOWN", the ECM begins to derate the power.

The ECM also limits the vehicle speed.

Electronic System Response Coolant temperature

is set to 90 C (194 F) while the diagnostic code

If "Engine Monitoring" is programmed to

is active. Cold Mode is disabled. If the ECM is

"WARNING", the check engine lamp will flash and

controlling the cooling fan, the fan will be ON.

the warning lamp will turn ON continuously.

Service Tool Display or Lamps Caterpillar

If "Engine Monitoring" is programmed to "DERATE"

Electronic Technician (ET) will indicate 90 C

or "SHUTDOWN", the check engine lamp and the

(194 F) and display "DIAG" next to "Engine

warning lamp will flash.

Coolant Temperature" on the status screen while the

diagnostic code is active. The Check Engine Lamp

This diagnostic code requires a customer password

will NOT illuminate unless this diagnostic code has

in order to be cleared.

been continuously active for 10 hours.

Engine Response If "Engine Monitoring" is

Engine Response Occasionally, the engine may

programmed to "WARNING", there is no effect on

emit white smoke on start-up because Cold Mode

engine power.

is not active.