Question about 1992 Chevrolet Caprice

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Do any have the cruise control module internal schematics?

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  • Jose Morillo
    Jose Morillo Apr 10, 2015

    i just solved it. Here is hard to find the right part. So I adquired a used module for a 1992 pick.up and check electronic integrated circuits were equivalent. Replace the 25111966 Ic and it's ready!

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Hi Jose
images from http://www.impalassforum.com/vBulletin/showthread.php?t=265864
Trust this helps, regards Alan

Do any have the cruise control module internal sch - 25637908-bubycy5voweeq51pl5tgif0z-4-0.jpg

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Posted on Apr 10, 2015

Testimonial: "THANKS. I mean the internal schematics of the control module. Specifically the cross reference of the integrated circuits"

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  • Chevrolet Master
  • 14,585 Answers

Good luck on that one. I have been searching for years for internal schematics for BCM's, ECM/PCM's, Security, and all the other related computers for cars. Old and new. Manufacturers just won't give them up. You just have to trace back and find out what's not working. Resistors, diodes, transistors, capacitors are pretty much marked. Get to the an IC chip, don't bother with a cross reference, the have manufacturer numbers on them. Your picture show old set ups. Remove the scan tag from the chip and there might be a Chip manufacturers number under it. Problem with yours and mine, if a part is burnt into, it's a guessing game. I save every board I can't fix for reference. I fix mostly surface mounted computers.

Posted on Apr 11, 2015

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1 Answer

How do I troubleshoot the cruise control of a 2003 Alero?


It's probably a problem with cruise control module , located under the hood in engine compartment . Or a bad connection somewhere . Do you know how to do electrical testing ? Is the air bag light lit on the instrument cluster ?

Could have DTC'S - diagnostic trouble code's stored .
DTC P1554
The powertrain control module (PCM) inhibits cruise control operation when certain conditions are not appropriate for cruise control operation. The PCM removes the ground from the cruise control inhibit signal circuit in order to disengage cruise control operation.
DTC P1585
Output driver modules (ODMs) are used by the powertrain control module (PCM) in order to turn on many of the current driven devices that are needed to control various engine and transaxle functions. DTC P1558 set indicates that an improper voltage level has been detected on the signal circuit which controls the cruise control inhibit circuit.
Action Taken When the DTC Sets
• The PCM will not illuminate the malfunction indicator lamp (MIL).
• The PCM will store the conditions present when the DTC set as Failure Records data only.

Cruise control is a speed control system that maintains a desired vehicle speed under normal driving conditions. However, steep grades may cause variations in the selected speeds. The electronic cruise control system has the capability to CRUISE, COAST, RESUME SPEED, ACCELERATE, and TAP-UP or TAP-DOWN.
The main parts of the cruise control system are:
• The cruise control module assembly
• The function control switches
• The cruise control release switch
• The clutch pedal position switch (CPP), if equipped
• The stop lamp switch assembly
• The vehicle speed sensor
The cruise control system uses the cruise control module assembly to maintain the desired vehicle cruise speed and operation. The cruise control module assembly has an electronic controller and an electric stepper motor to vary the throttle in each different cruise control mode. The electric controller monitors vehicle speed and operates the electric stepper motor. The stepper motor operates in response to the electronic controller, to maintain the desired cruise speed. The electric stepper motor moves a strap that is attached to the cruise control cable which moves the throttle linkage. The cruise control module assembly contains a low speed limit which will prevent system engagement below a minimum speed of 40 km/h (25 mph). The module assembly is not serviceable.

Dec 11, 2016 | 2003 Oldsmobile Alero

1 Answer

My cruise control won't work. How do I fix it in my 96 sunfire


Cruise Control Inoperative
Did you perform the Cruise Control System Check?
--
Go to Step 2
Go to Cruise Control System Check

2

  1. Disconnect the cruise control module connector.
  2. Turn the ignition switch to the RUN position.
  3. Measure the voltage between terminal F of the cruise control module harness connector and ground.
Does the voltage equal the specified value?
B+
Go to Step 3 yes
Go to Step 4 no

3

Measure the voltage between terminal E and terminal F of the cruise control module harness connector.
Does the voltage equal the specified value?
B+
Go to Step 5
Go to Step 6

4

Repair the open in CKT 339 between the fuse block and the cruise control module. Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?
--
Go to Cruise Control System Check
--

5

  1. Turn the cruise switch to the ON position.
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Does the voltage equal the specified value?
B+
Go to Step 7 yes
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Nov 21, 2015 | Cars & Trucks

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How do i locate the engine control module of a Mitsubishi montero sport


go online search electrical schematic / wiring diagram that shows all wiring and electrical component locator for your particular vehicle include model , year and engine size

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2002 buick rendezvous cruise control not working . where do I start to diagnose the problem and what steps to follow fuse is good


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1 Answer

Cruise control not working when it was it seammed to make the motor run very ruff when i disengaged it by using brake pedal


If the cruise control makes the engine seem to run very rough until disengaging it, there could be a problem with the engine itself. As, most cruise control systems just pull on the throttle cable to maintain speed on the highway based on setting the speed with the button.

So, I would look into the engine maybe having an issue with spark plugs, or wires, or another tuneup or mechanical issue.


Cruise Control Cable Removal & Installation To Remove:
chev_vent_cruise-cont-cabl-at-tb.gif

  1. Before servicing the vehicle refer to the precautions at the beginning of this section.
  2. Remove or disconnect the following:
    • The cable from the throttle lever and the accelerator control cable bracket gm_mv_ven_cruisecable.gif

    • The cable from the module by rotating the cable counter clockwise at the module
    • The cable from the module band
To Install:
NOTE: Ensure that the module strap is not twisted during cable installation
  1. Install or connect the following:
    • The cable to the module band
    • The cable to the module
    • The cable to the throttle lever and the accelerator control cable bracket
  2. Adjust the cruise control cable.
prev.gif next.gif Cruise Control Module Removal & Installation To Remove:
  1. Before servicing the vehicle refer to the precautions at the beginning of this section.
  2. Remove or disconnect the following: gm_mv_ven_cruisecable.gif

    • The cruise control cable from the module gm_mv_ven_cruisecon.gif

    • The electrical connector gm_mv_ven_cruisebolt.gif

    • The mounting bracket bolt from the cruise control module
    • The cruise control module from the mounting bracket
To Install:
  1. Install or connect the following:
    • The cruise control module to the mounting bracket
    • The mounting bracket bolt to the cruise control module
      1. Torque to 53 inch lbs.(6 Nm)
    • The electrical connector to the module
    • The cruise control cable to the module

Oct 11, 2010 | 1999 Pontiac Montana

1 Answer

My cruise control light comes on but won't engage


The reason any cruise control will not stay engaged is cause by 2 things.

1. Brake light switch. Check to see if your brake lights are coming on when your driving.... i.e have some one follow you while driving without the brake on.

or

2. Loss of speed sensor data to the control module. The speed sensor on an automatic transission car is located on somewhere the drive train / shaft. On a vehicle with a standard transmission the engine tach signal is used. (also unsed on automatic w/Over drive) If you do not see a tach reading on the instrument cluster I would suspect a tach sensor problem.

Troubleshooting needs to be in these 2 areas. As far as a source for schematics. Clymer and Haynes are 2 of many after market repair manuals.

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Anyone?

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4a69803.gif
Exploded view of the cruise control switch and related components


2dbe78a.gif
vehicle speed sensor location

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