| Author |
 Topic  |
|
|
dsalinas1939
Top Member
USA
1323 Posts |
 Posted - 02/29/2016 : 07:59:20 AM
|
| i have another junk ic that wont start iam getting a code 609 and icant find that code to get diagnostic tree the definition is dcu switched to low voltage anyone no where i can find the code tree |
|
|
dsalinas1939
Top Member
USA
1323 Posts |
Posted - 02/29/2016 : 08:28:25 AM
|
| its a twin turbo dt466 it tries to start then is dies right out my icp and ipr readings are good it has two fuel pressure reads 1 and 2 1 is showing pressure two is not is that normal the filter bowl is fuel of fuel |
 |
|
|
second.flood
Top Member
USA
640 Posts |
Posted - 02/29/2016 : 09:47:40 AM
|
3.3 - Engine Starts, Then Stalls
Overview
Engine is able to start (possibly briefly), but is not able to continue to run.
Possible Causes
• Damaged or restricted intake: Change Air Cooler (CAC), Engine Throttle Valve (ETV), Mass Air Flow (MAF),
air filter, intake piping, clamps, connections, etc.
• Damaged or restricted exhaust: Diesel Oxidation Catalyst (DOC), Diesel Particulate Filter (DPF), exhaust
brake, exhaust piping, etc.
• Exhaust Gas Recirculation (EGR) valve (stuck or sticking open)
• Combustion gasses in fuel (injector)
Test Procedure
Step 1 Perform operational checkout procedure Decision
Did you perform 3.0 Engine Hard to Start Operational Checkout Procedure? Yes: Go to Step 2.
No: Go to 3.0 Engine
Hard to Start Operational
Checkout Procedure
(page 29).
Step 2 Determine if engine air intake is restricted. Decision
A. Key-On Engine-Off (KOEO).
B. Connect Electronic Service Tool (EST) with ServiceMaxx™ software.
C. Select > Sessions > Default > Pressure tab.
D. Observe KOEO Intake Manifold Absolute Pressure (IMAP).
E. Observe IMAP, while cranking engine.
F. Calculate intake restriction: KOEO IMAP – Cranking IMAP = intake
restriction while cranking.
G.
Is intake restriction 0.9 psi (6.2 kPa) or greater?
Yes: Repair intake
restriction. After repairs
are complete, retest for
original problem.
No: Go to Step 3. |
|
|
|
second.flood
Top Member
USA
640 Posts |
Posted - 02/29/2016 : 09:50:03 AM
|
Step 3 Determine if Exhaust Gas Recirculation (EGR) valve is stuck or
sticking open.
Decision
Perform EGRV Operational Test (page 1538).
Does EGR system pass EGRV Operational Test?
Yes: Go to Step 4.
No: Repair EGR system
problem. After repairs
are complete, retest for
original problem.
Step 4 Determine if cylinder relative compression is within specifications. Decision
Perform Relative Compression Test (page 1436).
Do one or more cylinders have significant speed difference(s) than others?
Yes: Repair engine
mechanical problem.
After repairs are
complete, retest for
original problem.
No: Go to Step 5.
Step 5 Measure fuel pressure to determine if combustion pressure is leaking
into the fuel system.
Decision
Perform Fuel Delivery Pressure (FDP) Test (page 1548).
Is fuel pressure greater then specification and / or erratic?
Yes: Inspect fuel injector
seals and bottom of each
injector for burning. After
repairs are complete,
retest for original
problem.
No: End Diagnostic
Steps.
End Diagnostic Steps
After performing all diagnostic steps, if fault remains, verify if each step was completed correctly and the
proper decision was made. Notify supervisor for further action. |
|
|
|
dsalinas1939
Top Member
USA
1323 Posts |
Posted - 03/03/2016 : 05:54:45 AM
|
| i finally got back to working on this bus i also have an egr code for out of position it shows its at 35% would that ,ake it not start |
|
|
|
second.flood
Top Member
USA
640 Posts |
Posted - 03/03/2016 : 06:50:38 AM
|
| EGR is on the list of possible causes. I'd recommend attacking that code first. |
|
|
|
dsalinas1939
Top Member
USA
1323 Posts |
Posted - 03/03/2016 : 07:50:36 AM
|
| yeah i saw that was wondering what the percentage is a crank this one says 35% the intake manifold pressure is good |
|
|
|
second.flood
Top Member
USA
640 Posts |
Posted - 03/03/2016 : 08:20:32 AM
|
Exhaust Gas Recirculation Valve (EGRV) Operational Test
Overview
This test commands the Exhaust Gas Recirculation (EGR) valve to perform a self-diagnostic routine and
broadcast a fault code if there is a problem. The test commands the EGR valve completely open, waits for
a significant dwell time, commands the EGR valve completely closed, waits for a significant dwell time, and
repeats the test multiple times. Long dwell times and repeating tests are important. A stuck EGR valve will
broadcast an SPN 2791 FMI 7 fault code. Allowing at least 30 seconds between Output State tests is critical.
Output State tests will not finish without a minimum of 30 seconds between them. This is a manually-controlled
test.
Tool Required
• Electronic Service Tool (EST) with ServiceMaxx™ software
• Interface cable (RP1210B-compliant, supporting J1939 and J1708)
Equipment Condition
None
Test Setup
1. Key-On, Engine-Off (KOEO)
2. Connect Electronic Service Tool (EST) to vehicle Diagnostic Connector (page 1410).
3. Log in to ServiceMaxx™ software.
4. Perform KOEO Standard Test (page 1422).
Test Procedure
1. Key-Off for minimum of 45 seconds before testing.
Figure 534 Tests – Output State Low
2. Select: Tests > KOEO Tests > Output State Low Test (Figure 534) and wait 30 seconds for test to run. |
|
|
|
second.flood
Top Member
USA
640 Posts |
Posted - 03/03/2016 : 08:39:27 AM
|
Figure 535 Tests – Output State High
3. Select Tests > KOEO Tests > Output State High Test (Figure 535) and wait 30 seconds for test to run.
4. Repeat step 2 and step 3 in sequence three more times, waiting 30 seconds for each test to run.
Expected Outcome
Technician will determine if EGR valve is sticking. A free-moving EGR valve will not broadcast SPN 2971 FMI
7 during the EGRV Operation Test. A stuck EGR valve will broadcast SPN 2971 FMI 7 fault code.
Follow-On Maintenance
None |
|
|
|
dsalinas1939
Top Member
USA
1323 Posts |
Posted - 03/03/2016 : 08:47:23 AM
|
| i took the egr valve out i was supprised it came out i no on the older dt they dont come out but i got it out and sure enough it was stuck open |
|
|
|
second.flood
Top Member
USA
640 Posts |
Posted - 03/03/2016 : 09:20:02 AM
|
Awesome!
Let us know the results. |
|
|
|
dsalinas1939
Top Member
USA
1323 Posts |
Posted - 03/03/2016 : 09:31:18 AM
|
| i was able to work it free and close it i put back on and bus fired right up have a new one on order thanks for the help |
|
|
|
second.flood
Top Member
USA
640 Posts |
Posted - 03/03/2016 : 10:28:42 AM
|
Add an email to your profile and I can send you a pdf for performance issues.
Or write directly to my email. |
|
|
|
dsalinas1939
Top Member
USA
1323 Posts |
Posted - 03/03/2016 : 11:52:58 AM
|
| i have an email address on my profile i went to your profile and didnt see one so if u can check my profile again if not i will just give it to u here |
|
|
|
dsalinas1939
Top Member
USA
1323 Posts |
Posted - 03/03/2016 : 11:56:08 AM
|
| just add @yahoo.com to my screen name |
|
|
|
Mechan1c
Top Member
USA
853 Posts |
Posted - 04/10/2018 : 5:24:06 PM
|
| Here's your spam alert Bwest... |
|
|
|
torque
Advanced Member
Canada
358 Posts |
Posted - 04/11/2018 : 07:52:53 AM
|
| I gotta stop drinking, it is starting to effect my ability to read !!! |
|
|
|
Thomasbus24
Administrator
USA
4544 Posts |
Posted - 04/12/2018 : 08:39:30 AM
|
| Good Lord that was a mess! At least it wasn't about shampoo like the usual crap I delete. |
|
|
| |
Topic |
|
2012 466 code 609
