870 to 165 and have 7 error codes?
Thread Starter
Race Director
Joined: Feb 1999
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From: Indianapolis IN
870 to 165 and have 7 error codes?
Anyone have the same codes after the swap from 870-165?
I have following error codes pop up
23-MAT low
34-MAF low
33-MAF High
32-EGR Failure (which is disconnected/deleted)
51-Faulty installed ECM prom
42-EST Monitor Error
36-Burnoff diagnostic malfunction
I have following error codes pop up
23-MAT low
34-MAF low
33-MAF High
32-EGR Failure (which is disconnected/deleted)
51-Faulty installed ECM prom
42-EST Monitor Error
36-Burnoff diagnostic malfunction
Drifting
Joined: Nov 2001
Posts: 1,783
Likes: 2
From: Latham NY
Re: 870 to 165 and have 7 error codes? (ld85)
With all the MAF errors, something may not be wired right. The EGR error can be prevented in the prom. What bin are you programming from? Send me a copy and I'll look at it. wn@csi.com
Do you have the prom install in the right direction? If you're using the Moates adapter then the half moon at the top of the chip faces away from the zif socket handle.
[Modified by Bluevette85, 5:34 PM 5/31/2003]
Do you have the prom install in the right direction? If you're using the Moates adapter then the half moon at the top of the chip faces away from the zif socket handle.
[Modified by Bluevette85, 5:34 PM 5/31/2003]
Thread Starter
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
Re: 870 to 165 and have 7 error codes? (Bluevette85)
With all the MAF errors, something may not be wired right. The EGR error can be prevented in the prom. What bin are you programming from? Send me a copy and I'll look at it. wn@csi.com
Do you have the prom install in the right direction? If you're using the Moates adapter then the half moon at the top of the chip faces away from the zif socket handle.[Modified by Bluevette85, 5:34 PM 5/31/2003]
Do you have the prom install in the right direction? If you're using the Moates adapter then the half moon at the top of the chip faces away from the zif socket handle.[Modified by Bluevette85, 5:34 PM 5/31/2003]
Using a Craig Moates Adapter and everything is mounted correclty. I will check some wiring tomorrow AM.
Drifting
Joined: Nov 2001
Posts: 1,783
Likes: 2
From: Latham NY
Re: 870 to 165 and have 7 error codes? (ol,RJ)
RJ, sent you two things to fix in the bin.
ID85, check the maf relay wiring and make sure you're using the right relay for power and burnoff. Did you unplug the old burnoff module?
ID85, check the maf relay wiring and make sure you're using the right relay for power and burnoff. Did you unplug the old burnoff module?
Burning Brakes
Joined: Sep 2000
Posts: 1,199
Likes: 1
From: NewCastle IN. USA
Re: 870 to 165 and have 7 error codes? (HighHopes85)
HighHopes85,
we did have diacom hooked up, but I don't have values for key on engine off.
what is it you want to know and I'll make a note of them?
we did have diacom hooked up, but I don't have values for key on engine off.
what is it you want to know and I'll make a note of them?
Thread Starter
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
Re: 870 to 165 and have 7 error codes? (Bluevette85)
RJ, sent you two things to fix in the bin.
ID85, check the maf relay wiring and make sure you're using the right relay for power and burnoff. Did you unplug the old burnoff module?
ID85, check the maf relay wiring and make sure you're using the right relay for power and burnoff. Did you unplug the old burnoff module?
I will check all ECM wiring this morning.
The relays I connectors were EC85 and the relays were part #M22 and #M82, I could have gotten these swapped as there were no numbers on the parts themselves.
Yes I unplugged the old burnoff module.
UPDATE, I chekced all of the ECM wiring and it is correct. The only thing wierd is the D-12 wire that went to the D-2 position is Blk-Pnk (or purple) and is not Black like the directions state.
[Modified by ld85, 9:24 AM 6/1/2003]
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Drifting
Joined: Nov 2001
Posts: 1,783
Likes: 2
From: Latham NY
Re: 870 to 165 and have 7 error codes? (ld85)
I will check all ECM wiring this morning.
The relays I connectors were EC85 and the relays were part #M22 and #M82, I could have gotten these swapped as there were no numbers on the parts themselves.
The relays I connectors were EC85 and the relays were part #M22 and #M82, I could have gotten these swapped as there were no numbers on the parts themselves.
UPDATE, I chekced all of the ECM wiring and it is correct. The only thing wierd is the D-12 wire that went to the D-2 position is Blk-Pnk (or purple) and is not Black like the directions state.
Thread Starter
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
Re: 870 to 165 and have 7 error codes? (Bluevette85)
The power relay has 5 connectors and the burnoff has only 4 when looking into the bottom of the relay.
UPDATE, I chekced all of the ECM wiring and it is correct. The only thing wierd is the D-12 wire that went to the D-2 position is Blk-Pnk (or purple) and is not Black like the directions state.
That wire should go to the ground of the tps sensor. Unplug the wire from the harness and put an ohm meter on that pin and to the tps connector (1 of the three pins should read 0, the others should read infinity). If not, you have the wrong wire.
UPDATE, I chekced all of the ECM wiring and it is correct. The only thing wierd is the D-12 wire that went to the D-2 position is Blk-Pnk (or purple) and is not Black like the directions state.
That wire should go to the ground of the tps sensor. Unplug the wire from the harness and put an ohm meter on that pin and to the tps connector (1 of the three pins should read 0, the others should read infinity). If not, you have the wrong wire.
BTW the TPS voltage info would log accuratley in the DIACOM software so I am sure the wiring is per the directions. I will check the plug and TPS wire anyway.
Drifting
Joined: Nov 2001
Posts: 1,783
Likes: 2
From: Latham NY
Re: 870 to 165 and have 7 error codes? (ld85)
ID85,
Sent you an email with some pictures.
My D12-D2 wire is black with purple stripe.
M22 = power relay
M82 - burnoff relay.
Did you run a new ecm connector pin into the now empty D12 to the Burnoff relay pin B? DON'T use the D12 that is now D2 for this.
[Modified by Bluevette85, 7:41 PM 6/1/2003]
Sent you an email with some pictures.
My D12-D2 wire is black with purple stripe.
M22 = power relay
M82 - burnoff relay.
Did you run a new ecm connector pin into the now empty D12 to the Burnoff relay pin B? DON'T use the D12 that is now D2 for this.
[Modified by Bluevette85, 7:41 PM 6/1/2003]
Thread Starter
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
Re: 870 to 165 and have 7 error codes? (Bluevette85)
ID85,
Sent you an email with some pictures.
My D12-D2 wire is black with purple stripe.
M22 = power relay
M82 - burnoff relay.
Did you run a new ecm connector pin into the now empty D12 to the Burnoff relay pin B? DON'T use the D12 that is now D2 for this.
[Modified by Bluevette85, 7:41 PM 6/1/2003]
Sent you an email with some pictures.
My D12-D2 wire is black with purple stripe.
M22 = power relay
M82 - burnoff relay.
Did you run a new ecm connector pin into the now empty D12 to the Burnoff relay pin B? DON'T use the D12 that is now D2 for this.
[Modified by Bluevette85, 7:41 PM 6/1/2003]
Yes I ran a new wire to the empty D-12 pin form the burnoff relay.
I am going to go thru the GM manual diagnostic tonight!
Both of my relays have 5 pins so it is tough to tell which one is which, I will get out the volt meter and see which relay is which based on the schematic tonight.
In looking at the GM manual diagnostics for error # 33 & 34 it says the Burnoff malfunction can cause the two MAF high/low errors. If the burnoff is the problem then this will account for 3 of the error codes once corrected.
[Modified by ld85, 8:30 AM 6/2/2003]
Thread Starter
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
Re: 870 to 165 and have 7 error codes? (ld85)
Also, my 1985 GM manual says the MAT should get 5-6 volts, and the wiring from Chevy Thunder says the voltage, "varies average of .45V".
Maybe the MAT is not getting enough voltage, should I get a 1986 MAT sensor?
Maybe the MAT is not getting enough voltage, should I get a 1986 MAT sensor?
Drifting
Joined: Nov 2001
Posts: 1,783
Likes: 2
From: Latham NY
Re: 870 to 165 and have 7 error codes? (ld85)
The MAT is a themoresistor. The resistence decreases as the temperature increases. The voltage probably is 4-5 volts from the ecm but would read <1 volt after it passes thru the MAT at room temp. The only thing difference in a later year will be the connector. Try using the Maotes scanning software to read the values of all the sensors to see if they are working correctly.
Thread Starter
Race Director
Joined: Feb 1999
Posts: 12,772
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From: Indianapolis IN
Re: 870 to 165 and have 7 error codes? (ld85)
I think I may have found the problem, I originally used 14-18 gauge splice connectors when splicing the wires together. The kind that has two holes in it with a spade and a cap that snaps over the top of the connected wires after the splice has occurred.
I found this morning that the little "spade" that pierces the wire sheath and engages the wire, was not doing so because the spade gap was too large and it would graze the sheath or engage the wire barely on one side or the other or not at all.
So I re-did the setup using 18-22 gauge spade/splice connectors. It seems to be working now, but we will connect with a laptop on Friday or Saturday and look it over.
:banghead: :banghead: :hurray: :hurray:
I found this morning that the little "spade" that pierces the wire sheath and engages the wire, was not doing so because the spade gap was too large and it would graze the sheath or engage the wire barely on one side or the other or not at all.
So I re-did the setup using 18-22 gauge spade/splice connectors. It seems to be working now, but we will connect with a laptop on Friday or Saturday and look it over.
:banghead: :banghead: :hurray: :hurray: