NO HIGH RESOLUTION PULSE FROM OPTI ,code 36 ??
Thread Starter
Racer
Joined: Aug 2002
Posts: 405
Likes: 0
From: hamilton ontario
NO HIGH RESOLUTION PULSE FROM OPTI ,code 36 ??
I scanned my 1992 corvette got a code 36 .Did the flow diagram from the gm manual comes up as NO HIGH RESOLUTION PULSE FROM OPTI
not being received by ecm.I do vave 4.7 volts coming from ecm to opti .Is there a repair for this or do I have to replace the entire opti.Can It be cleaned,
Thanks Mike
not being received by ecm.I do vave 4.7 volts coming from ecm to opti .Is there a repair for this or do I have to replace the entire opti.Can It be cleaned,
Thanks Mike
Le Mans Master
Joined: May 2005
Posts: 7,340
Likes: 2,268
From: Central Maryland
Originally Posted by mjfox
I scanned my 1992 corvette got a code 36 .Did the flow diagram from the gm manual comes up as NO HIGH RESOLUTION PULSE FROM OPTI
not being received by ecm.I do vave 4.7 volts coming from ecm to opti .Is there a repair for this or do I have to replace the entire opti.Can It be cleaned,
Thanks Mike
not being received by ecm.I do vave 4.7 volts coming from ecm to opti .Is there a repair for this or do I have to replace the entire opti.Can It be cleaned,
Thanks Mike
CF Member Tom Piper noted that a coil wire that's too close to the Opti harness can, in rare cases, cause anomalies on the Opti signal lines, but he also notes that the wiring harness on your '92 has a shield that the later LT1/LT4 Corvettes lack, and that this shield should prevent such an occurrence on a '92.
Check the harness between the Opti and ECM for any signs of an open circuit on the high-res signal line, and if you find nothing, there's a 99% chance that a new Opti will be the only cure.
Be well,
SJW
Thread Starter
Racer
Joined: Aug 2002
Posts: 405
Likes: 0
From: hamilton ontario
opti signal line
Which line is the opti signal line to the ecm
A low res black /red
B high res purple /white
C ignition feed yellow
D system ground black/pink
F system shield clear
anyone
know
thanks Mike
A low res black /red
B high res purple /white
C ignition feed yellow
D system ground black/pink
F system shield clear
anyone
know
thanks Mike
Le Mans Master
Joined: May 2005
Posts: 7,340
Likes: 2,268
From: Central Maryland
Originally Posted by mjfox
Which line is the opti signal line to the ecm
A low res black /red
B high res purple /white
C ignition feed yellow
D system ground black/pink
F system shield clear
anyone
know
thanks Mike
A low res black /red
B high res purple /white
C ignition feed yellow
D system ground black/pink
F system shield clear
anyone
know
thanks Mike
Be well,
SJW
Burning Brakes
Joined: Nov 2004
Posts: 1,107
Likes: 0
From: RI
code 16 is the low res pulse off red/black and code 36 is purple/white.
Helms will tell you to check connections at the harness beside the intake manifold then the opti harness itself. If everything is good, bad optical sensor=bad opti.
Helms will tell you to check connections at the harness beside the intake manifold then the opti harness itself. If everything is good, bad optical sensor=bad opti.
