IDM issue... I Think???
Thread Starter
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Tuned
Joined: Feb 2008
Posts: 445
Likes: 1
From: Forest Grove, BC
Before I open up IDM I plugged it back in Hooked up AE to try another Buzz with drivers side bank unplugged NO BUZZ from pass side bank
Also under codes...No codes then below that it says Enhanced Powertrain..No Response From Module
?????????
Also under codes...No codes then below that it says Enhanced Powertrain..No Response From Module
?????????
Thread Starter
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Tuned
Joined: Feb 2008
Posts: 445
Likes: 1
From: Forest Grove, BC
Im Stumped The buzz test worked to tell me there was a issue with 6,8 bank. Sure enough there was a burnt pin #6 glowplug Installed new pig tails, gasket and harnesses on that side.
Now Nothing no start, instraments cluster lights up like normal
Plug in AE and it connects to pcm, searches and loads all 500+ sensors, try to buzz injectors and nothing
Now Nothing no start, instraments cluster lights up like normal
Plug in AE and it connects to pcm, searches and loads all 500+ sensors, try to buzz injectors and nothing
Postmaster
Joined: Sep 2007
Posts: 4,195
Likes: 6
From: Medford Oregon
Does AE communicate at all with the PCM?
Can you read anything such as EOT?
I don't have AE but on my scanner when checking for codes the PCM reports P1111 which means "all is good", no codes stored.
Just trying to get a better picture on what is happening.
Can you read anything such as EOT?
I don't have AE but on my scanner when checking for codes the PCM reports P1111 which means "all is good", no codes stored.
Just trying to get a better picture on what is happening.
Thread Starter
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Tuned
Joined: Feb 2008
Posts: 445
Likes: 1
From: Forest Grove, BC
Ya the AE detects all sensors when booting up. It reads voltage, ICP when cranking over etc.
It seems that there is no communication or controle with IDM
My batt voltage is a bit low due to cranking a lot... Charging now They are brand new batts
It seems that there is no communication or controle with IDM
My batt voltage is a bit low due to cranking a lot... Charging now They are brand new batts
Lead Driver
Joined: Oct 2003
Posts: 8,476
Likes: 37
From: Madison, WI
PCM may have disabled the IDM on account of low voltage. IDM has to develop 120VDC, so the PCM may have a protection program built in that says, in effect, sorry, no IDM action if battery reference voltage is below X. So try again after you've jumped some juice into those batts. Don't bother trying to crank it until you get the comm/buzz/IDM issue resolved. For that matter, to conserve power, disconnect the GP relay for this phase.
Thread Starter
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Tuned
Joined: Feb 2008
Posts: 445
Likes: 1
From: Forest Grove, BC
If the PCM has disabled the IDM is there a way to reset this condition. I have the batts disconnected for the night, they are fully charged. In the morning I wil disconnect the GP reconnect the batts and try to Buzz the injectors. I have also looked at all the ground cables I could find and connections and they look good.
Is there a list that says all the ground wires on these wiring harnesses??
Is there a list that says all the ground wires on these wiring harnesses??
Thread Starter
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Tuned
Joined: Feb 2008
Posts: 445
Likes: 1
From: Forest Grove, BC
OK Batts fully charged, disconnect GP's Reconnect batts and tried to do buzz test. No GO!! tried only buzz pass side...NO GO tried buzzing only drivers side...NO GO
OK pulled valve covers to inspect for broken wires or shorts, looks good
Did ohm test gasket pins to ground and GP pins to injector pins ALL GOOD
Disconnected IDM and did ohm test from pigtails to IDM Plug...All GOOD also checked all IDM / Pigtail wires to ground for a short... All GOOD
Checked for power to # 8 maxi fuse power to it with ign OFF
Checked power to fuse 22 no power with ign off power with ign ON
Checked IDM and PCM power relays GOOD
How do I test My IDM??? Have not opened up looks sealed and shake sounds good
Thanks
OK pulled valve covers to inspect for broken wires or shorts, looks good
Did ohm test gasket pins to ground and GP pins to injector pins ALL GOOD
Disconnected IDM and did ohm test from pigtails to IDM Plug...All GOOD also checked all IDM / Pigtail wires to ground for a short... All GOOD
Checked for power to # 8 maxi fuse power to it with ign OFF
Checked power to fuse 22 no power with ign off power with ign ON
Checked IDM and PCM power relays GOOD
How do I test My IDM??? Have not opened up looks sealed and shake sounds good
Thanks
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Thread Starter
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Tuned
Joined: Feb 2008
Posts: 445
Likes: 1
From: Forest Grove, BC
Ok Got the Buzz test to work, All I did was check one of the new pigtails and didn't like it so I cut it off and installed another one...
Did the buzz test and got several codes
P0276
P1272
P1274
P1276
P1278
P1296
Something definatelly wrong with the drivers side.
Pulled gasket off ( with built in injector harnesses) Plugged into pigtails, Unplugged IDM and did ohm test from IDM plug to inj. Plug:
Common- 0.2 ohm across the bank
#2 -0.2 ohm
#4 - 0.2
#6 - 0.2
#8 - 0.4
Did the buzz test and got several codes
P0276
P1272
P1274
P1276
P1278
P1296
Something definatelly wrong with the drivers side.
Pulled gasket off ( with built in injector harnesses) Plugged into pigtails, Unplugged IDM and did ohm test from IDM plug to inj. Plug:
Common- 0.2 ohm across the bank
#2 -0.2 ohm
#4 - 0.2
#6 - 0.2
#8 - 0.4
Thread Starter
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Tuned
Joined: Feb 2008
Posts: 445
Likes: 1
From: Forest Grove, BC
I measured resistance between high and low on inj. 2, 4, 6, 8 Measured at gasket plug all were between 2.6 and 2.7 ohms
With all the wiring and injectors looking good for that bank where do I go from here???
IDM replace???
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With all the wiring and injectors looking good for that bank where do I go from here???
IDM replace???
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New User
Joined: Apr 2012
Posts: 16
Likes: 0
From: Away from Zombies
I just read both pages of this thread. I saw that DZL JIM recommended swapping out your IDM with a known good one. I didn't read that you tried that yet but you sure have done a lot of troubleshooting so far.
Postmaster
Joined: Sep 2007
Posts: 4,195
Likes: 6
From: Medford Oregon
Well, everything worked till you replaced Valve Cover harnesses. If it was me I would start by removing harness wrapping until reaching original wiring so color coding can be seen. Re-do or at least verify correct wiring.
You can do some additional resistance checks with IDM plugged in ...
97-15A 7.3L DI Turbo Workshop Manual
Click on Electronic System Control Diagnostics then Click On Injector Drive Circuit Operation.
You can do some additional resistance checks with IDM plugged in ...
97-15A 7.3L DI Turbo Workshop Manual
Click on Electronic System Control Diagnostics then Click On Injector Drive Circuit Operation.