KENR9101

73

Symptom Troubleshooting

Table 89

Diagnostic Trouble Codes That Cause the ARD to Be Disabled

J1939  Code

Code Description

Comments

Diesel Particulate Filter 1 Conditions Not Met for Active

Regeneration

The diesel particulate filter is not able to perform an active re-

generation at the current engine operating conditions.

3750-31

Particulate Trap Active Regeneration Inhibited Due to Inhibit  The regenerationsystem is disabled by the “ARD Disable”

3703-31

Switch

switch.

1. Check for Diagnostic Codes that are Active

a.   The operator has disabled the regeneration

system by moving the “ARD Disable” switch

to the STOP position. Move the “ARD Disable”

switch to the START position in order to

a.

Connect the electronic service tool to the

diagnostic connector.

perform a regeneration. Refer to the Operation

and Maintenance Manual, “Monitoring System

(Aftertreatment Regeneration Device)” for the

correct operation of the regeneration system.

b.

c.

Turn the keyswitch to the ON position.

Monitor the active diagnostic code screen on

the electronic service tool. Check and record

any diagnostic codes that are active or logged.

Look for the following diagnostic codes:

b.

Return the unit to service.

i04807945

Note: Wait at least 30 seconds in order for the

diagnostic codes to become active.

ARD Loss of Combustion

•   3750-31

•   3703-31

System Operation Description:

This procedure covers the following diagnostic code:

d.

e.

Remove the electrical power from the ECM.

If a 3750-31 diagnostic code is present,

proceed to Step 2.

f.

If a 3703-31 diagnostic code is present,

proceed to Step 3.

2. A 3750-31 Diagnostic Code is Present.

a.

The operator did not allow enough time at a

suitable engine speed and load for

regeneration to occur. The operator must act

when the DPF lamp is illuminated. Once the

DPF and action lamp are illuminated, the

operator must allow the engine to operate at a

reduced load until the soot load is reduced to

50 percent.

b.

c.

Refer to the Operation and Maintenance

Manual, “Monitoring System (Aftertreatment

Regeneration Device)” for the correct

operation of the regeneration system.

Return the unit to service.

3. A 3703-31 Diagnostic Code is Present.

This document is printed from SPI². Not for RESALE

74

KENR9101

Symptom Troubleshooting

Table 90

Diagnostic Trouble Code that Relates to ARD Loss of Combustion

J1939  Code

Description

Notes

3474-14

Aftertreatment #1 Loss of    This code indicates that the Aftertreatment RegenerationDevice (ARD) has stopped generating heat

Combustion : Special

Instruction

4 or more times during an active high speed regeneration.

Other diagnostic trouble codes may indicate the cause of the loss of combustion. The codes are

listed in the troubleshooting procedure.

The code must be cleared with the  “Reset All”  button on the active diagnostics screen in the elec-

tronic service tool. If an active regeneration is initiated with the forced regenerationswitch on the

dash, the Electronic Control Module (ECM) clears this code automatically.

3474-31

Aftertreatment #1 : Loss of  This code indicates that the Aftertreatment RegenerationDevice (ARD) has stopped generating heat

Combustion

4 or more times during an active regeneration.

Other diagnostic trouble codes may indicate the system that caused the loss of combustion to occur.

The codes are listed in the troubleshooting procedure.

The code must be cleared with the  “Reset All”  button on the active diagnostics screen in the elec-

tronic service tool. If an active regeneration is initiated with the forced regenerationswitch on the

dash, the Electronic Control Module (ECM) clears this code automatically.

System Operation

Table 91

Associated Diagnostic Codes

The combustion air system routes pressurized air

from the outlet of the high-pressure turbocharger to

the ARD. The combustion air is mixed with fuel inside

the ARD combustion head. The air/fuel mixture is

ignited and the air/fuel mixture is burned in order to

increase the temperature of the exhaust gas. The

high temperature exhaust gas burns off the soot in

the Diesel Particulate Filter (DPF). This process is

known as DPF regeneration.

Associated Diagnostic

Procedure

J1939 Code

3487-7

Description

Aftertreatment #1

Air Pressure Control

: Not Responding

Properly

Solenoid Valve - Test

3480-16

3480-17

3480-18

Aftertreatment #1

Fuel Pressure #1 :

High - Moderate Se-

verity (2)

ARD Pilot Fuel Pressure Is

High

The ECM sends a pulse width modulated signal to

the combustion air valve. The actuator in the

combustion air valve regulates the combustion air to

the ARD combustion head.

Aftertreatment #1

Fuel Pressure #1 :

Low - Least Severe

(1)

ARD Pilot Fuel Pressure Is

Low

The ECM also sends pulse width modulated signals

to the pilot fuel control valve and the main fuel control

valve. The fuel control valves regulate the amount of

fuel that is injected into the ARD combustion head.

Aftertreatment #1

Fuel Pressure #1 :

Low - Moderate Se-

verity (2)

ARD Pilot Fuel Pressure Is

Low

If the amount of fuel or air that enters the ARD

combustion head is incorrect, combustion may not

occur.

102-18

3556-7

Engine Intake Mani-   Intake Manifold Air Pres-

fold #1 Pressure

Low (2)

sure Is Low

Test Step 1. Check for Associated

Diagnostic Trouble Codes

Aftertreatment Fuel    ARD Nozzle Heater - Test

Injector #1 : Not Re-

sponding Properly

A. Establish communication between the electronic

service tool and the engine ECM.

Results:

B. Table 91 lists the diagnostic trouble codes that are

associated with “3474-31 Loss Of Combustion”

code. Determine if any of the codes in Table 91

are present.

•   An associated diagnostic trouble code is not

present. Proceed to Test Step 2.

•   An associated diagnostic trouble code is present.

Repair: Refer to TroubleshootingDiagnostic

Trouble Codes in order to troubleshoot the

associated diagnostic code.

This document is printed from SPI². Not for RESALE

KENR9101

STOP.

75

Symptom Troubleshooting

E. Click the “Connect”  icon on the electronic service

tool in order to connect the electronic service tool

to the engine.

Test Step 2. Check the Current Flow

Through the Heater

F. Start the engine. Allow the engine to idle for 3

minutes.

A. Verify that the engine is off. Check the current flow

through the heater. Refer to Systems Operation/

Testing and AdjustingARD Nozzle Current - Test

for the correct procedure.

G.Start a service regeneration by selecting the

following menus on the electronic service tool:

•

•

•

“Service”

Expected Result:

“Service Procedures”

The current flow is above 7.0 amps for a 12 VDC

system.

“Manual Diesel Particulate Filter

Regeneration”

The current flow is above 3.5 amps for a 24 VDC

system.

The electronic service tool will display a

“Waiting On Requirements” window. The

ECM will automatically elevate the engine

speed.

The duration of the service regeneration

depends on the soot load in the DPF. The

ECM will automatically return the engine

speed to low idle after the service

regeneration is complete.

Results:

•   The current flow is above the expected amount for

the appropriate system voltage . – The current flow

is OK. Proceed to Test Step 3.

•   The current flow is below the expected amount for

the appropriate system voltage . – The current flow

is low.

Repair: Determine the cause of the low current

flow. Refer to TroubleshootingARD Nozzle

Heater - Test.

Note: The ECM tests the nozzle for plugging after

the service regeneration is complete. An

“Aftertreatment Fuel Injector #1 : Not Responding

Properly”  code will become active if the nozzle is

plugged.

STOP.

Test Step 3. Perform a Service

Regeneration

Expected Result:

The service regeneration has been successfully

completed.

Note: This test must be performed through the

electronic service tool. The electronic service tool

enhances the diagnostics during the service test.

Results:

A. If the following codes are active, clear the codes.

The ARD will not light if the codes are active.

•   The service regeneration completes successfully.

– STOP. Return to service.

•   3703-31Diesel Particulate Filter

Active Regeneration Inhibited Due

to Inhibit Switch

•   The service regeneration did not complete

successfully.

Repair: Check the list of active diagnostic

codes. Troubleshoot the code that applies to the

failed regeneration.

•   3530-31Aftertreatment#1

Regeneration Manually Disabled

Proceed to Test Step 1.

B. Click the “Disconnect”  icon on the electronic

service tool in order to disconnect the electronic

service tool from the engine.

•   The service regeneration did not complete

successfully and there are no associated codes.

Proceed to Test Step 4.

C. Turn the keyswitch to the OFF position. Wait for 5

seconds.

Test Step 4. Perform an ARD Air System

Service Test

D. Turn the keyswitch to the ON position.

Use the electronic service tool to perform the

ARD Air System Service Test.

This document is printed from SPI². Not for RESALE