"Fast Idle Enabled Lamp"

TM 9-2320-312-24-2

Troubleshooting Section

The coolant temperature sensor circuit has no

If the "Output #9" parameter is programmed to "Wait

to Start Lamp", the output will turn on when the air

short circuit faults that are active.

inlet heater is on and the engine is not running.

The coolant temperature is at 113 C (235 F) or

Table 104

above 113 C (235 F) for four seconds.

Manufacturer

Alternative

Default

Note: If the circuit for terminal 29 is shorted to

N/A

ground in the wiring harness, the vehicle shutdown

module will shut down the engine.

Other

"Wait to Start

"Fast Idle Lamp"

Lamp"

After a ground has been detected for two seconds,

the vehicle shutdown module will alert the driver

When the "Truck Manufacturer" parameter is

of an impending shutdown. A "Check Gauges"

programmed to "GM" the "Output #9" (Warning

message and an audible tone will be present for

Lamp) is used with the standard Caterpillar

approximately 25 seconds. A second tone will then

Engine Monitoring system. With SEP00 and

sound when the vehicle shutdown module removes

newer Personality Modules, "Output #9" can be

keyswitch power from the ECM input. When the

configured to only activate when the ECM detects

keyswitch power is removed from the ECM input,

high engine coolant temperature. The "Engine

the engine will shut down.

Monitoring Lamps" parameter can be programmed

to "Warning Lamp" for normal operation with the

Note: When the "High Coolant Temp Warning Lamp"

Engine Monitoring system. This is the default

feature is utilized, the other Caterpillar engine

option. The "Engine Monitoring Lamps" parameter

monitoring features are not available to shut down

can also be programmed to the "High Coolant

the engine. The vehicle shutdown module may

Temp Warning Lamp" option. In this configuration,

provide similar functions.

the ECM will only provide an indication of high

coolant temperature. This setting allows the ECM to

"Fast Idle Enabled Lamp"

interface with the Vehicle Shutdown System. When

this setting is used, the warning lamp will not be

OCT01 and newer Personality Modules.

available for normal use with the Caterpillar Engine

Monitoring System.

This parameter configures the ECM to turn on a

lamp that is connected to output J1/P1:31 or to

When the ECM is configured for the "High Coolant

output J1/P1:21 when fast idle operation is active.

Temp Warning Lamp" option, the output for the

To use this feature, a momentary switch must

warning lamp (terminal 29) will be connected to the

be connected to input #18 (J1/P1:40) and the

vehicle shutdown module. The ECM will provide

parameter "Fast Idle RPM #1" must be programmed

a ground path at terminal 29, if a high coolant

to a valid speed that is above low idle.

temperature is detected. If a ground path is present

at the ECM output for the warning lamp (terminal

Table 105

29), the vehicle shutdown module will disrupt

Manufacturer

keyswitch power to the ECM. This will cause the

Alternatives

Default

/ Model

engine to shut down. The ECM will only pull terminal

29 to ground when all of the following conditions

"J1/P1:21"

Other

"J1/P1:31"

"NONE"

are present:

"J1/P1:31"

GMT-560

"J1/P1:21"

"Truck Manufacturer" parameter is programmed

"NONE"

to "GM".

"Wait To Start Lamp"

"Engine Monitoring Mode" parameter is not

programmed to "OFF".

Note: This feature is only available when "Truck

Manufacturer" is programmed to "Other".

"Engine Monitoring Lamps" parameter is

programmed to "High Coolant Temp Warning

This parameter configures the ECM to turn on a

Lamp".

lamp that is connected to output J1/P1:31 when the

air inlet heater is on and the engine is not running.

The engine has been running for a minimum of

"Fast Idle Enabled Lamp" must be programmed to

30 seconds.

"J1/P1:21" for this feature to be used.

The coolant temperature sensor circuit has no

open circuit faults that are active.