OCT01 Software -807640596

418

TM 9-2320-312-24-2

Troubleshooting Section

The output 9 (terminal 31) can be used as a fast idle

lamp or a Wait to Start Lamp output. The "Output

#9" parameter defaults to "Fast Idle Lamp", but the

parameter can be programmed to operate as a wait

to start lamp.

Note: When the "Truck Manufacturer" is programmed

to "GM" configurations the "Output #9" parameter is

unavailable. The "Output #9" parameter functions

as fast idle lamp output.

If the "Output #9" parameter is programmed to

"Wait To Start Lamp", the ECM will turn on output 9

when the air inlet heater is operating and the engine

is not running. The wait to start lamp functions

g00770585

Illustration 189

similarly to the lamp for the air inlet heater that can

be installed in parallel with the relay for the air inlet

heater circuit. The wait to start lamp illuminates only

when the engine is not running. The lamp for the

air inlet heater illuminates when the relay for the air

inlet heater is energized.

OCT01 Software

The parameter "Output #9" is no longer available.

The parameter "Wait To Start Lamp" can be

programmed to "J1/P1:31" or "None". When the

parameter is programmed to "J1/P1:31" a lamp

circuit can be connected to terminal 31 in order to

indicate that the air inlet heater is on and the engine

is not running. The parameter "Fast Idle Enabled

Lamp" must be programmed to "J1/P1:21" for this

feature to be used.

Note: This feature is only available when "Truck

Manufacturer" is programmed to "Other".

Electrical Connection of Lamps

One terminal of the lamp must be connected to

battery voltage through the vehicle wiring. The other

terminal is connected to the ECM at the vehicle

harness connector J1/P1 at terminal 31.

The ECM provides a path to ground in order to turn

on the lamp.

g00770189

Illustration 190

Test Step 1. Inspect Electrical Connectors

and Wiring.

A. Thoroughly inspect ECM vehicle harness

connector J1/P1, the firewall bulkhead connector,

or the wait to start lamp. Refer to Troubleshooting,

"Electrical Connectors - Inspect" for details.