P0650 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


OBD-II Trouble Shooting Got a code reader? Find out what your GM car's Check Engine light is trying to tell you (and then turn Check Engine light off).

 
 
 
 
Thread Tools Search this Thread
Old 11-25-2009, 08:53 PM   #1
Senior Member
True Car Nut
Thread Starter
 
Purplehazeir's Avatar
 
Join Date: Sep 2008
Location: Arlington, WA
Posts: 7,979
Thanks: 0
Thanked 1 Time in 1 Post
Purplehazeir is on a distinguished road
Default P0650

P0650

Description
Malfunction Indicator Lamp (MIL) Control Circuit Output drive moduels (ODM’*) are used by the powertrain control module (PCM) to turn on many of the current-driven devices that are needed to control various engine and transaxle functions. Each ODM is capable of controlling up to 7 separate outputs by applying ground to the device whish the PCM is commanding ON. Unlike quad diver modules (QDM’*) used in prior model years, ODM’* have the capability of diagnosing each output circuit individually. DTC P0650 set indicates an improper voltage level on the output circuit that control the MIL.

Symptoms

  • The PCM will illuminate the malfunction indicator lamp (MIL) during the second consecutive trip in which the diagnostic test has been run and failed.
  • The PCM will store the conditions, which were present when the DTC set as Freeze Frame and Failure Records Data only.
  • If the misfire is determined to be catalyst damaging, the PCM will flash the MIL.
Causes
  • An improper voltage level has been detected on ODM D output 1 (the MIL control circuit)
  • The above conditions are present for at least 30 seconds.

Solutions
Check for the following conditions:
  • A faulty connection at the PCM – inspect the harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, and faulty terminal to wire connections.
  • Inspect the wiring harness for damage.
  • If the harness appears to be okay, disconnect the PCM, turn the ignition ON and observe a DMM connected between the MIL control circuit and ground at the PCM harness connector while moving connectors and wiring harnesses related to the MIL. A change in voltage will indicate the location of the fault.
  • Located the MIL fuse. If the fuse is open, locate and repair a short to ground in the MIL ignition supply circuit or a shorted cluster. Inspect the MIL fuse and replace as necessary. Did you find and replace the blown fuse and make repairs?
    • Yes – Clear the DTC.
    • NO – Turn the ignition OFF and disconnect the PCM. If the jumper fuse opens, locate and repair a short to voltage in the MIL control circuit or a shorted cluster. Install a 3amp fused jumper between the MIL control circuit at the PCM harness connector and a good ground. Turn the ignition ON with the engine off. Is the MIL illuminated?
      • YES – Leave the ignition on and remove the jumper. Is the MIL still illuminated?
        • YES – Remove the instrument cluster. Test the MIL control circuit for a short to ground and repair as necessary. Did you fin and repair the condition?
          • YES – Clear the DTC
        • NO – Inspect the PCM and PCM harness connector for faulty connections and repair as necessary. Did you find and correct the connection?
          • YES – Clear DTC
          • NO – Replace the PCM
      • NO – Remove the instrument cluster. Test the MIL control circuit for a short to ground and repair as necessary. Did you fin and repair the condition?
          • YES – Clear the DTC
        • NO – Test the MIL ignition supply circuit for an open and repair as necessary. Did you find a problem and correct?
          • YES – Clear the DTC
          • NO – Inspect the cluster harness connector for faulty connections and repair as necessary. Did you find and repair the condition?
            • YES – Clear the DTC
            • NO – Repair or replace the cluster. Did you complete the repair or replacement?
            • YES – Clear the DTC
Purplehazeir is offline  
 
 
 

Related Topics
Thread Thread Starter Forum Replies Last Post
P0650 2009 Cadillac SRX MyRedSRX Cadillac 7 02-20-2013 11:25 AM
p0650 code won't go away BennitoCruz Oldsmobile 4 07-28-2012 10:42 AM
P0650 whats this mean ole fart Buick 11 02-09-2012 07:22 AM
P0650 code Rosco the Iroc 2000-2005 6 08-09-2006 05:11 PM


Tags
obd2, obdii, p0650, p650

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 02:35 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.