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Old 04-06-2010, 04:52 PM   #1 (permalink)
Phiberoptik
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6.5L Diesel Engine Tdc Offset Relearn Procedures

I found this online (http://www.fullsizechevy.com/showthr...410&viewfull=1) and wanted to get some feedback on it... Please advise if this is the correct way to do a TDC Offset Relearn, Thanks!!!

DIESEL ENGINE TDC OFFSET RELEARN PROCEDURES

This procedure should only be performed when one or more of the following has occurred:

1. A diagnostic trouble code of P1214 (TDC offset not established) is present.
2. The engine has been replaced.
3. The front engine cover has been replaced.
4. The PCM with or without the injection pump has been replaced.
5. The crankshaft position sensor has been replaced.


NOTE: Replacement of only the injection pump does not require this procedure.

In order to initiate the relearn:

1. Hook up your scan tool.
2. Start the engine and idle engine until coolant temperature is at least 170 degrees F.
3. Clear any diagnostic trouble codes, if any. Then turn the engine off.
4. Turn the ignition switch to the “On” position. Do not start the engine.
5. Prepare the PCM to activate the offset relearn by placing and holding the accelerator pedal in the fully open position for no less than 45 seconds. Then release the pedal.
6. Turn the ignition switch to the “Off” position for 30 seconds. To confirm that the PCM has powered down, you should get a “No communication with vehicle” message on your scan tool.
7. Now start the engine and make sure that the coolant temperature is 170 degrees F or higher.
8. As soon as the engine coolant has reached 170 degrees F. and the engine speed is below 1500 RPM, the PCM will automatically learn the new TDC offset. A slight stumble in engine RPM is indicative that the new TDC has been activated.
9. Verify the TDC offset reading on your scan tool. The TDC offset should be between -0.25 and –0.75 degrees. If the TDC offset is within the specification, the relearn is completed. If the offset is out of specification then the injection pump must be adjusted. If the injection pump has not been replaced or adjusted and the TDC offset is very high on the positive side, then check for damage on the camshaft driven gear or key-way. If the TDC offset is very high on the negative side, check the crankshaft sensor for proper installation.

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• 1996 Suburban 6.5L TD K2500 4 x 4 (F Vin), High idle switch, New IP DS4831-5521S, Remote mounted (gray) PMD, Remote mounted OPS, 160 Amp Alt., 2 New Die Hard Platinum Batteries, K&N Air filter in factory intake box, Retired Emergency 911 vehicle, White with tan interior and Cage behind the back seats, 20" rims w/285/50R20 Cooper Discoverer R/T tires, Diamond Eye Performance Exhaust; 3" down pipe & 4" pipe w/muffler straight back, new reman. vacuum pump, 2 new front windows as track on old ones rusted, new A/C blower resistor, always more to come...‹(•Ώ•)›

• 2000 Mazda 626 ES V6 (gasser) stock 103000 miles (wife's ride)

• 2005 Colorado (gasser) stock 65000 miles (2nd work truck) (SOLD)
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Old 04-06-2010, 05:20 PM   #2 (permalink)
Bison
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Yep,Thats about the size of it.

__________________
98 GMC 2500 hd sle 6.5td ext cab l box 4x4 auto 4.10 difs 268000 km. HOME REBUILD ENGINE at 268.000 km,currently 307.000
Removed CDR an installed PROVENT CRANK CASE OIL SEPERATOR/VENTILATION VALVE,3 1/2" straight pipe.
PMD heatsink relocated to inside air stream in pass fender between batt and air filter.PMD is easely accessable.
Other mods, to nummerous to mention.
95 GMC SL 2500 6.5td ext cab sh box auto, 409.000 km,CDR vented to atmosfeer at 307 k, remote pmd, extra glow bypass/LP test switch, relocated OPS ,in cab fuel gauge .High idle switch,new paint.Foot dimmer swich for simultaniously high/low beam. The Wife's pride and joy.
89 GMC 2500 sle 4x4 ext cab 6.2 na stock 740000+ km, engine rebuilt at 660000 km, rusting out now, but runs like new.
Waldon Wheelloader repowered with 6.2 na.
3 tractors dsl ,72 AC 940 whj loader,ASV 4810 Positrack skidsteer
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Old 04-06-2010, 06:24 PM   #3 (permalink)
DJ Dave
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Hmmmm I have been mislead
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Spare 599 motor
(not sure what year though)
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Old 04-06-2010, 06:54 PM   #4 (permalink)
DJ Dave
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"Set base ⁠timing⁠ to 3.5 degrees with the stepper motor disabled via the TECH 2.

Then, perform a "TDC Learn" procedure and set "TDC offset"

I was told his was the only way to do it, and nothing else would work
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1995 k2500
6.5 turbo - PMD re-locator
(and lots of white smoke)

Spare 599 motor
(not sure what year though)
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Old 04-06-2010, 08:09 PM   #5 (permalink)
Phiberoptik
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Okay, but what if I do not have a Tech2 scan tool... All I have is a OBDII PocketScan Code Reader. Can I still do the TDC Offset Relearn?
__________________
• 1996 Suburban 6.5L TD K2500 4 x 4 (F Vin), High idle switch, New IP DS4831-5521S, Remote mounted (gray) PMD, Remote mounted OPS, 160 Amp Alt., 2 New Die Hard Platinum Batteries, K&N Air filter in factory intake box, Retired Emergency 911 vehicle, White with tan interior and Cage behind the back seats, 20" rims w/285/50R20 Cooper Discoverer R/T tires, Diamond Eye Performance Exhaust; 3" down pipe & 4" pipe w/muffler straight back, new reman. vacuum pump, 2 new front windows as track on old ones rusted, new A/C blower resistor, always more to come...‹(•Ώ•)›

• 2000 Mazda 626 ES V6 (gasser) stock 103000 miles (wife's ride)

• 2005 Colorado (gasser) stock 65000 miles (2nd work truck) (SOLD)
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Old 04-06-2010, 08:22 PM   #6 (permalink)
crankme69
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Quote:
Originally Posted by Phiberoptik View Post
I found this online (http://www.fullsizechevy.com/showthr...410&viewfull=1) and wanted to get some feedback on it... Please advise if this is the correct way to do a TDC Offset Relearn, Thanks!!!

DIESEL ENGINE TDC OFFSET RELEARN PROCEDURES

This procedure should only be performed when one or more of the following has occurred:

1. A diagnostic trouble code of P1214 (TDC offset not established) is present.
2. The engine has been replaced.
3. The front engine cover has been replaced.
4. The PCM with or without the injection pump has been replaced.
5. The crankshaft position sensor has been replaced.


NOTE: Replacement of only the injection pump does not require this procedure.

In order to initiate the relearn:

1. Hook up your scan tool.
2. Start the engine and idle engine until coolant temperature is at least 170 degrees F.
3. Clear any diagnostic trouble codes, if any. Then turn the engine off.
4. Turn the ignition switch to the “On” position. Do not start the engine.
5. Prepare the PCM to activate the offset relearn by placing and holding the accelerator pedal in the fully open position for no less than 45 seconds. Then release the pedal.
6. Turn the ignition switch to the “Off” position for 30 seconds. To confirm that the PCM has powered down, you should get a “No communication with vehicle” message on your scan tool.
7. Now start the engine and make sure that the coolant temperature is 170 degrees F or higher.
8. As soon as the engine coolant has reached 170 degrees F. and the engine speed is below 1500 RPM, the PCM will automatically learn the new TDC offset. A slight stumble in engine RPM is indicative that the new TDC has been activated.
9. Verify the TDC offset reading on your scan tool. The TDC offset should be between -0.25 and –0.75 degrees. If the TDC offset is within the specification, the relearn is completed. If the offset is out of specification then the injection pump must be adjusted. If the injection pump has not been replaced or adjusted and the TDC offset is very high on the positive side, then check for damage on the camshaft driven gear or key-way. If the TDC offset is very high on the negative side, check the crankshaft sensor for proper installation.
OBD11 only?
__________________
1995 1500 Silverado 6.5TD 2WD Ext Cab 246K, FSD cooler bumper mount, Buddy 3 pos chip, DE 4" exhaust, K47 with F intake

1995 Tahoe 6.5TD 217K Buddy chipped cat & muff delete

1994 1500 Silverado 6.5TD 2WD RCLB 208K Buddy chip F intake, daily work commuter 21mpg avg

2005 FLHTC 107 Twin Cam Tman 625 cams, 10.1 CR, Mik 45, DTT map, 3.37 final, E1 clutch & VPC with SE 6 sp, SnS roller rockers Bub 7 2 into 1 exhaust, 120Tq & 120Hp

1995 FXD 80 EVO V Thunder 2015 cam, Mikuni 42, SE slip ons, 80Tq & 70Hp
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Old 04-06-2010, 08:56 PM   #7 (permalink)
bk95td
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OBD 1 scan tool only. OBD2[96+] KOKO ;key on key off]
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91 K2500LD reg cab 6.2 4L60 deceased at 310k
92 k2500hd 6.5 4L80E std cab died of frame cancer285 k
4- 93 k2500hd 6.5 2-4L80E 2-NV4500 2-ex-cab 2 std
94 K2500HD 6.5td 4L80E new reman engine
94 K2500HD 6.5td NV4500 Std cab LB
2-94 K1500 Ex cab 6.5TD 4L80E 1-LB parts truck 1-SB
94 k25000 Suburban 6.5td 4l80E
95 tahoe 2 dr 6.5 4L80E needs HG or engine
95 k2500LD 6.5 4L80E std cab bad trans
95 k2500hd 6.5 4L80E ex-cab
2-95 K2500 Suburban 6.5TD 4L80E both need engines
97 k2500hd 6.5 4L80E std cab
97 k3500 C&C 6.5 4L80E std cab needs engine
98 k2500 hd 6.5 4L80E std cab bad trans
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Old 04-06-2010, 10:45 PM   #8 (permalink)
Bison
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Quote:
Originally Posted by Phiberoptik View Post
Okay, but what if I do not have a Tech2 scan tool... All I have is a OBDII PocketScan Code Reader. Can I still do the TDC Offset Relearn?
Well you can do only the KOKO methode to do a relearn,but without a scan tool to verify the setting its like a blind man going target shooting.

Code readers are just reading codes.
__________________
98 GMC 2500 hd sle 6.5td ext cab l box 4x4 auto 4.10 difs 268000 km. HOME REBUILD ENGINE at 268.000 km,currently 307.000
Removed CDR an installed PROVENT CRANK CASE OIL SEPERATOR/VENTILATION VALVE,3 1/2" straight pipe.
PMD heatsink relocated to inside air stream in pass fender between batt and air filter.PMD is easely accessable.
Other mods, to nummerous to mention.
95 GMC SL 2500 6.5td ext cab sh box auto, 409.000 km,CDR vented to atmosfeer at 307 k, remote pmd, extra glow bypass/LP test switch, relocated OPS ,in cab fuel gauge .High idle switch,new paint.Foot dimmer swich for simultaniously high/low beam. The Wife's pride and joy.
89 GMC 2500 sle 4x4 ext cab 6.2 na stock 740000+ km, engine rebuilt at 660000 km, rusting out now, but runs like new.
Waldon Wheelloader repowered with 6.2 na.
3 tractors dsl ,72 AC 940 whj loader,ASV 4810 Positrack skidsteer
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Old 04-11-2010, 03:09 PM   #9 (permalink)
Phiberoptik
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Quote:
Originally Posted by Bison View Post
Well you can do only the KOKO methode to do a relearn,but without a scan tool to verify the setting its like a blind man going target shooting.

Code readers are just reading codes.

Could it hurt or better to take it somewhere for the relearn?
__________________
• 1996 Suburban 6.5L TD K2500 4 x 4 (F Vin), High idle switch, New IP DS4831-5521S, Remote mounted (gray) PMD, Remote mounted OPS, 160 Amp Alt., 2 New Die Hard Platinum Batteries, K&N Air filter in factory intake box, Retired Emergency 911 vehicle, White with tan interior and Cage behind the back seats, 20" rims w/285/50R20 Cooper Discoverer R/T tires, Diamond Eye Performance Exhaust; 3" down pipe & 4" pipe w/muffler straight back, new reman. vacuum pump, 2 new front windows as track on old ones rusted, new A/C blower resistor, always more to come...‹(•Ώ•)›

• 2000 Mazda 626 ES V6 (gasser) stock 103000 miles (wife's ride)

• 2005 Colorado (gasser) stock 65000 miles (2nd work truck) (SOLD)
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Old 04-11-2010, 04:28 PM   #10 (permalink)
Bison
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You can try,you might get lucky if the IP was set within the perimeters.I would rather have a scan tool hooked up.
Its your call.

__________________
98 GMC 2500 hd sle 6.5td ext cab l box 4x4 auto 4.10 difs 268000 km. HOME REBUILD ENGINE at 268.000 km,currently 307.000
Removed CDR an installed PROVENT CRANK CASE OIL SEPERATOR/VENTILATION VALVE,3 1/2" straight pipe.
PMD heatsink relocated to inside air stream in pass fender between batt and air filter.PMD is easely accessable.
Other mods, to nummerous to mention.
95 GMC SL 2500 6.5td ext cab sh box auto, 409.000 km,CDR vented to atmosfeer at 307 k, remote pmd, extra glow bypass/LP test switch, relocated OPS ,in cab fuel gauge .High idle switch,new paint.Foot dimmer swich for simultaniously high/low beam. The Wife's pride and joy.
89 GMC 2500 sle 4x4 ext cab 6.2 na stock 740000+ km, engine rebuilt at 660000 km, rusting out now, but runs like new.
Waldon Wheelloader repowered with 6.2 na.
3 tractors dsl ,72 AC 940 whj loader,ASV 4810 Positrack skidsteer
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