Test Step 2. Check for Active Diagnostic Codes -807640547

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TM 9-2320-312-24-2

Troubleshooting Section

Repair the connectors or wiring and/or replace

B. Measure the voltage at terminal "A" (+12 V) with

the connectors or wiring. Ensure that all of the

reference to terminal "B" (sensor common) at the

seals are properly in place and ensure that the

connector J406. This connector is for the remote

connectors are completely coupled.

accelerator position sensor.

Verify that the repair eliminates the problem.

Expected Result:

The measured voltage is between 11.0 VDC and

STOP.

13.5 VDC.

Test Step 2. Check for Active Diagnostic

Codes

Results:

OK The voltage is OK. Proceed to Test Step 4.

A. Connect ET to the cab data link connector.

Not OK The vehicle wiring or the battery is

B. Turn the ignition key switch to the ON position.

causing the problem. Repair the wiring or the

battery. Replace the wiring or the battery. Perform

C. Monitor the active diagnostic code screen on ET.

the repair that is necessary. Verify that the repair

Check and record active diagnostic codes.

has fixed the problem. STOP.

Note: When the ECM automatically calibrates new

Test Step 4. Check the Duty Cycle of

duty cycle values for the low idle throttle position

the Remote Accelerator Pedal Position

and the high idle throttle position the ECM assumes

Sensor

22 percent duty cycle at low idle and 75 percent

duty cycle at high idle. As a result, you may notice

A. Turn the ignition key switch to the ON position.

that the PTO throttle position status reaches 100

percent well before the remote PTO accelerator

B. Monitor the duty cycle of the PTO throttle sensor

pedal is fully depressed. This is normal. After

on ET. Access the following display screen in

some cycling of the accelerator pedal to the high

order:

idle position, the ECM will adjust the calibration

automatically. The ECM will adjust the calibration

"Service"

automatically provided that the high idle stop

position is within the 75 to 90 percent duty cycle

"Calibrations"

range, and the low idle is in the 10 to 22 percent

duty cycle range. During normal operation, you

"Monitor Throttle Position Sensor"

may notice that more movement of the remote PTO

accelerator pedal is required for the PTO throttle

Expected Result:

position status to increase above 3 percent. You

may also observe that the status reaches the 100

The duty cycle is between 10 and 22 percent with

percent value prior to the limit of the high idle

the accelerator pedal assembly in the low idle

position. This is done in order to ensure that the

position, and the duty cycle is between 75 and 90

accelerator reaches these two critical points for

percent with the accelerator pedal assembly in the

engine operation.

high idle position.

Expected Result:

Results:

Result 1 Diagnostic Code 30-08 or 30-13 is active.

OK The remote accelerator position sensor is

operating correctly. Proceed to Test Step 5.

Result 2 There are no active diagnostic codes

that are related to the accelerator position sensor

Not OK The remote accelerator position sensor

circuit at this time, but a problem is suspected with

circuit is not operating correctly. Proceed to Test

operation of the remote PTO acelerator position

Step 6.

sensor circuit.

Test Step 5. Check the Status of the

Results:

Power Train Data Link on ET

Result 1 Proceed to Test Step 3.

A. Start the engine. While the status of the PTO

throttle position is being monitored on ET,

Result 2 Proceed to Test Step 3.

depress the remote PTO accelerator pedal and

Test Step 3. Check the Supply Voltage for

release the remote PTO accelerator pedal. The

the Remote Accelerator Position Sensor

throttle position status and the engine should

respond to the change in the accelerator pedal

position.

A. Turn the ignition key switch to the ON position.