Question about 2002 Kia Spectra

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Transmission not down shifting correctly

Had the car scanned and i replaced the transmission control unit, the car worked fine for about thirty minutes and then started again, now the code reader says P-0758 shift solenoid B electrical? is this in the trany?? and can it be prchased?

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  • paco566 Jun 26, 2009

    I took a transmission and differential class in high school and am pretty familiar with most of the internal workings, so i feel confident i can do it, and thanks for all your help..You guys are great..

  • paco566 Jun 26, 2009

    Shift solenoid B, is that the same as 1-2 shift solenoid? Also it only shows a solenoid pack for 2000-up, they show a 1-2 solenoid for 90-99.. But the transmission parts house says the solenoid is seperate from the pack and believe this will work.. Sound right to you??

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  • 237 Answers

The B shift solenoid is mounted internal to the transmission on the valve body. It can be purchased and replaced. However, if you are not familiar with the internals of an auto transmission I strongly recommend that you have a professional do the job for you. It's not a major job.

Posted on Jun 25, 2009

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2005 cts won't sift out of park, press the brake pedal and start the car, just won't shift out of park


You probably have a problem with

Automatic Transmission Shift Lock Control System
The automatic transmission shift lock control system is a safety device that prevents an inadvertent shift out of PARK when the engine is running. The driver must press the brake pedal before moving the shift lever out of the PARK position. The system consists of the following components.
• The automatic transmission shift lock control solenoid
• The brake switch
• The rear integration module (RIM)
• The transmission control module (TCM) or powertrain control module (PCM)
With the ignition ON, battery positive voltage is supplied to the automatic transmission shift lock control solenoid from the ignition 3 relay. The automatic transmission shift lock control solenoid is controlled by the rear integration module. When the rear integration module (RIM) receives a class 2 serial data message from the transmission control module (TCM) or powertrain control module (PCM) indicating that the shift lever is in the PARK position the rear integration module (RIM) grounds the automatic transmission shift lock control solenoid control circuit. This causes the solenoid to energize mechanically locking the shift lever in the PARK position. When the driver presses the brake pedal the rear integration module receives the brake applied signal and turns off the ground to the automatic transmission shift lock control solenoid control circuit. This allows the shift lever to be moved out of the PARK position.

Shift Lever Does Not Move with Brake Pedal Depressed

2
Apply the parking brake and block the wheels.
Turn ON the ignition, with the engine OFF.
Attempt to move the shift lever out of the PARK position.
Does the shift lever move out of the PARK position?
YES - Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
NO - Go to Step 3
3
Turn OFF the ignition.
Install a scan tool.
Turn ON the ignition, with the engine OFF.
With a scan tool, observe the TCC brake switch parameter in the transmission data display list.
Press and release the brake pedal several times.
Does the TCC brake switch status turn ON and OFF with the brake pedal?
YES - Go to Step 4
NO - Go to Stop Lamps Inoperative in Lighting Systems
4
With a scan tool, observe the brake to shift control parameter in the rear integration module data list.
Press and release the brake pedal several times.
Does the brake to shift control status turn ON and OFF with the brake pedal?
YES - Go to Step 5
NO - Go to Step 8
5
Turn OFF the ignition.
Connect a test lamp between the automatic transmission shift lock control solenoid supply voltage circuit and the automatic transmission shift lock control solenoid control circuit at the automatic transmission shift lock control solenoid.
Turn ON the ignition, with the engine OFF.
With a scan tool, command the brake to shift control ON and OFF several times while observing the test lamp.
Does the test lamp turn ON and OFF with each command?
YES - Go to Step 7
NO - Go to Step 6
6
Test the automatic transmission shift lock control solenoid control circuit for and open or short to battery voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
YES - Go to Step 11
NO - Go to Step 8
7
Inspect for poor connection at the harness connector of the automatic transmission shift lock control solenoid. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
YES - Go to Step 11
NO - Go to Step 9
8
Inspect for poor connections at the harness connector of the rear integration module (RIM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
Yes - Go to Step 11
NO - Go to Step 10
9
Replace the automatic transmission shift lock control solenoid. Refer to Automatic Transmission Shift Lock Actuator Replacement .
YES - Did you complete the replacement?
NO - Go to Step 11
--
10
Replace the RIM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.
YES - Did you complete the replacement?
NO - Go to Step 11
--
11
Operate the system in order to verify the repair.
Did you find and correct the condition?
YES - System OK
NO - Go to Step 2

Mar 25, 2017 | Cadillac CTS Cars & Trucks

1 Answer

How do I get shifter out of park?


The automatic transmission shift lock control system is a safety device that prevents an inadvertent shift out of PARK when the engine is running. The driver must press the brake pedal before moving the shift lever out of the PARK position. The system consists of the following components:
?€¢
The automatic transmission shift lock control solenoid


?€¢
The body control module (BCM)


?€¢
The powertrain control module (PCM)

The BCM controls the voltage to the shift lock control solenoid through the shift lock control solenoid controlled voltage circuit. The following conditions must be met before the BCM will supply voltage to the shift lock control solenoid:
?€¢
The ignition is in the ON position.


?€¢
The PCM sends a class 2 message to the BCM indicating the transmission is in the PARK position.


?€¢
The BCM determines the brake pedal is not applied according to the stop lamp switch.

When the ignition is in the ON position, the ignition 1 fuse supplies voltage to the automatic transmission shift lock control solenoid as the BCM supplies a ground to the control circuit, mechanically locking the shift lever in the PARK position as the solenoid energizes. When the brake pedal is applied, the BCM turns the ground of the control circuit OFF, de-energizing the shift lock control solenoid. The de-energized solenoid releases the mechanical lock allowing the driver to move the shift lever out of the PARK position. When the transmission is out of the PARK position, the shift lock control solenoid remains de-energized.
Your best bet is to take it to the dealer ,may have DTC'S
DTC B2707 Gearshift Unlock Circuit Low
The body control module (BCM) controls the automatic transmission shift lock control solenoid by providing a controlled ground to the automatic transmission shift lock control solenoid. The BCM utilizes a smart driver to monitor the voltage and current flow of the automatic transmission shift lock control solenoid control circuit. DTC B2707 will set when the BCM detects a short to ground when the solenoid is in the OFF state.
DTC B2708 Gearshift Unlock Circuit High
Did you perform the Diagnostic System Check - Vehicle?
Go to Step 2
Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

2

  1. Turn ON the ignition, with the engine OFF.
  2. Press and hold the brake pedal.
  3. Attempt to move the shift lever out of the PARK position.
Does the shift lever move out of the PARK position?
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
Go to Step 3

3

  1. Turn OFF the ignition.
  2. Install a scan tool.
  3. Turn ON the ignition, with the engine OFF.
  4. Press and hold the brake pedal.
  5. With a scan tool, command the Brake to Shift Relay output control parameter On.
  6. Attempt to move the shift lever out of the PARK position.
Does the shift lever move out of the PARK position?
Go to Step 4
Go to Step 6

4

  1. With the scan tool, observe the Brake Switch parameter in the powertrain control module (PCM) data display list.
  2. Press and release the brake pedal several times while observing the scan tool.
Does the brake input display Applied and Released with the brake pedal operation?
Go to Step 5
Go to Diagnostic Starting Point - Lighting Systems in Lighting Systems

5

With the scan tool observe the TR Sw. parameter in the body control module (BCM) data list.
Does the scan tool indicate PARK position?
Go to Step 9
Go to Scan Tool Data List in Engine Controls - 3.4L

6

  1. Turn OFF the ignition.
  2. Disconnect the harness connector of the automatic transmission shift lock control solenoid.
  3. Turn ON the ignition, with the engine OFF.
  4. Press and hold the brake pedal.
  5. Attempt to move the shift lever out of the PARK position.
Does the shift lever move out of the PARK position?
Go to Step 7
Go to Step 8

7

Test the controlled ground circuit of the automatic transmission shift lock control solenoid for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 12
Go to Step 9

8

Inspect for poor connections as the harness connector of the automatic transmission shift lock control solenoid. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 12
Go to Step 10

9

Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 12
Go to Step 11

10

Replace the automatic transmission shift lock control solenoid. Refer to Shift Lock Control Solenoid Replacement .
Did you complete the replacement?
Go to Step 12
--

11

Replace the BCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup and programming.
Did you complete the replacement?
Go to Step 12
--

12

Operate the system in order to verify the repair.
Did you find and correct the condition?
System OK
Go to Step 3

Your best bet

Jan 11, 2016 | 2005 Chevrolet Equinox

1 Answer

Transmission -does fine until it warms up, then does not want to shift correctly, drive begins flashing.


d flash mans, tranny fault
so scan it. us the obd2 scan tool, any and scan it.
the A/T IS VERY complex, do the tests shown in the FSM
guessing dont work
but in general (experience)
wont shift correctly dont cut it. (200 parts, and 50 was to mess up)
????
flare, skips gears, wont up shift, wont down shift, or shifts wrong speed. what gears work, what dont. just a clue and help goes get better
The tranny TCM can go to limphome mode, this mode is very clear.
and covered in the FSM and
one common failure, that happens with high mileage and poor service (not doing a flush at 50k miles)
is stuck in 1st gear, hot. only.
the ATF fluid gets more thin hot and pump output drops
this is usually a vary bad sign.
the Stall test fails.
the pump pressure test fails, hot.
there is no vacuum lines to this electronically shifted trans.
the ended back 1990(about). with old 3speeds.

scan it, could be something slimple like
the PRNDL shift switch fibbing like crazy. (common)
this car has TCM, a transmission brain.
look for OBD2 DTC errors P07xx (trans)
this TCM (part of PCM) function relies on sensor for shifting
they are:
1: TPS
2: engine INPUT rpm
3: tranny output rpm
4: shift selector.
5: ECT (engine temps)
6: ECU part of the PCM calculates load at all times and sends that to the TCM , so that TCM can down shift on hills, or upshift faster on the flat or down hill.
this LOAD feature is what replaced the VACUUM of old days.

The D light , hopefully is just a bad input (cheap)
scan it. and see, its begging for you to do that.

Jan 02, 2014 | 2001 Honda Odyssey

3 Answers

I have a 98 Chevy s10 4.3L Vortec 2WD. Replaced transmission with another 4L60E and it want shift. What's the problem? It will shift if you manually down shift it but it want shift anymore! When you...


Hello
The engine and automatic transmission in this vehicles drive train are fully electronically controlled by a computer called the PCM (Power Train Control Module). Whenever a problem like this occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant temperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPENDING YOUR HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM
Bottom line here it needs to be scanned to see what is going on, quit guessing.

Aug 25, 2012 | Cars & Trucks

1 Answer

What could be wrong with Transmission?


Hello
1st let me explain how the transmission in this car is shifted, there is a computer control module, it is called the "Powertrain Control Module" or PCM, some cars have a separate computer that is just for the transmission, this is a TCM, your cars PCM does both jobs of running the engine and shifting the transmission. The actual shifting is done by electric solenoids inside the transmission which the PCM controls by grounding them, when the computer determines it is time to shift based on vehicle speed and transmission fluid temperature and other inputs from the engine sensors it grounds the proper solenoid that shifts the transmission up or down to the appropriate gear, it monitores the shift electronically and if it doesn't see that the transmission has done what it was commanded to do it sets a fault code in its memory. I have read your problem and no mention is made that "Your Mechanic" scanned the system for fault codes, if he did and nothing shows up then you have a mechanical fault in the transmission and it will need to be torn down and rebuilt to correct this shift problem.
My experience is 25 years as a Ford factory trained repair and diagnosis technican.

Nov 04, 2011 | 2004 Mercury Mountaineer

1 Answer

Transmission not shifting correctly


u have a shorted trans shift solenoid B inside the transmission

Jun 25, 2009 | 2002 Kia Spectra

1 Answer

1999 Sable quits shifting when it gets hot


How do you know it's getting hot ? What is the Temp gauge showing ? Do the cooling fans work ? Have it checked for trouble codes an scan data checked .
It was however the correct thing to do in changing the fluid and filter - that's the first suspect. No no it wasn't , the correct thing would be to take it to a qualified repair shop . Hooking up a professional type scan tool an viewing data , inputs to transmission control module , ECM/PCM - engine computer etc. The control module controls shift solenoids -which shift the transmission . You could have 1-2 shift solenoid shorting when getting hot . View scan data is the only way to see this problem .

Jul 22, 2017 | 1999 Mercury Sable

1 Answer

97 saturn CL2 having shifting problems


Check the Transmision kick down cable,,which is attatched to the throttle cable and goes into the transmission,,it may need adjustment.

Jan 19, 2009 | 1993 Saturn SC2

1 Answer

Hello, I own a 93 toyota forerunner, 4*4, v6, automatic. Transmission was only shifting at very high rpms. Replaced trans with another out of identical vehicle, transmission will not shift, disconnected...


The transmission is controlled by the Transmission Control Unit (TCU).

Throttle position, rpm, and speed are input parameters to the TCU. The TCU has a default set of shift patterns. These shift patterns change over time based on your specific vehicle setup and driving habbits.

The shift patterns are only slightly affected by driving habbits over many driving cycles. But, changing the relationship between the throttle position and the actual speed being reported by the speed sensor can have an immediate effect on shift patterns.

While your speedo may now be correct, the realtionship between rpm and thottle position has not been corrected. That would take a gear change in the differentials.

The TCU can be reset to an inital learn base line. When this is done, the TCU will instantly learn the dynamics of your setup.

Any shop with an advanced ODB scan tool can reset the the TCU. The dealer or a transmission shop would be preferable.

You really should change your differential gears as opposed to resetting the TCU

This information was posted by ftgiles here

Jan 06, 2009 | 1993 Toyota 4Runner

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