Question about 1996 Pontiac Grand Am

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Tcc switch 1996 pontiac grand am

What are the colors of the 2 wires on the transmission plug that control the tcc switch for a 1996 grand am

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There are 4 solenoids in the transmission, they are all supplied 12V through a common pink wire, and grounded individually by the computer. There are two solenoids for the tcc, one is called the tcc application solenoid, the other is the tcc PWM (pulse width modulation) solenoid. I'm not positive, but I believe the PWM solenoid faciitates the smooth engagement and disengagement of the tcc, but the application solenoid controls the bulk of the hydraulic pressure. If you want to check the resistance of these solenoids, the application solenoid is grounded through the tan/black wire, so you should see aproximately 28 ohms resistance between the pink wire and the tan/blk wire as they go into the transmission. The tcc PWM solenoid should have a resistance of about 12 ohms and you would measure this between the pink wire and the brown wire. The transmission should be electrically disconnected when you do these tests.

Posted on May 11, 2009

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1996 Pontiac firebird v6 3.8L error code p1860 p1860pd p0306 p1460pd changed tcc pwm solenoid code still won't clear others only appear during a 100 mile drive cycle please help!!!


You replaced the TCC solenoid , but did you test the electrical circuit ? Code description - DTC P1860 TCC PWM Solenoid Circuit Electrical. - YOU SEE SOLENOID CIRCUIT ELECTRICAL - no where does it say to replace the solenoid . TEST THE ELECTRICL CIRCUIT ! P0306 should set right away if misfire is present . P0306 cylinder # 6 misfire !
The TCC PWM Solenoid Valve controls the fluid acting on the converter clutch valve, which then controls the application and release of the TCC. The solenoid attaches to the control valve body within the transmission. Circuit 439 supplies ignition voltage directly to the solenoid. The PCM controls the solenoid by providing a ground path on circuit 418. Current flows through the solenoid coil according to the duty cycle (percentage of ON and OFF time). The TCC PWM Solenoid Valve provides a smooth engagement of the torque converter clutch by operating during a duty cycle percent of ON time.
When the PCM detects a continuous open or a short to ground in the TCC PWM circuit or the TCC PWM Solenoid Valve, then DTC P1860 sets. DTC P1860 is a type A DTC.
Diagnostic Aids
?€¢
Inspect the wiring for any poor electrical connections at the PCM. Inspect the wiring at the transmission 20-way connector. Look for the following conditions:


-
A bent terminal


-
A backed out terminal


-
A damaged terminal


-
Poor terminal tension


-
A chafed wire


-
A broken wire inside the insulation


?€¢
When diagnosing for an intermittent short or an open condition, massage the wiring harness while watching the test equipment for a change



2

  1. Install the scan tool.
  2. With the engine OFF, turn the ignition switch to the RUN position.
  3. Important: Before clearing the DTCs, use the scan tool in order to record the Freeze Frame and the Failure Records for reference. The Clear Info function will erase the data.
  4. Record the DTC Freeze Frame and the DTC Failure Records.
Are DTCs P0753, P0758, P1860, P1864, or P1886 set?
--
Go to Step 3
Go to Step 4

3

Inspect circuit 439, the solenoid, the PCM IGN fuse, and the Automatic Transmission Wiring Harness for an open or a short to ground.
Refer to Electrical Diagnosis, Section 8.
Did you find and correct a problem?
--
Go to Step 17
--

4
  1. Turn the ignition switch to the OFF position.
  2. Disconnect the transmission 20-way connector (additional DTCs may set).
  3. Install the J 39775 Jumper Harness on the engine harness connector .
  4. With the engine OFF, turn the ignition switch to the RUN position.
  5. Connect a lest lamp from the J 39775 Jumper Harness connector cavity E to ground.
Does the test lamp illuminate?
--
Go to Step 6
Go to Step 5

5

Repair the open in the ignition feed circuit 439 to the TCC PWM Solenoid Valve. Refer to Electrical Diagnosis, Section 8.
Is the repair complete?
--
Go to Step 17
--

6
  1. Install the test lamp from cavities E to U of the J 39775 Jumper Harness connector .
  2. Using the scan tool, command the TCC PWM Solenoid Valve ON and OFF 3 times.
Does the test lamp illuminate when you command the TCC PWM Solenoid Valve ON, and turn OFF when you command the valve OFF?
--
Go to Step 8
Go to Step 7

7

  1. Inspect circuit 418 for an open.
  2. Inspect circuit 418 for a short to ground.
  3. Repair the circuit if necessary.
Refer to Electrical Diagnosis, Section 8.
Did you find and correct a problem?
--
Go to Step 17
Go to Step 9

8
  1. Install the J 39775 Jumper Harness on the Connector End View 20-way connector.
  2. Using the J 39200 DVOM and the J 35616-A Connector Test Adapter Kit, measure the resistance between terminals E and U.
Is the resistance within the specified range?
10-15ohms
Go to Step 11
Go to Step 10

9

Inspect the PCM connector terminals for the following conditions:
  1. Damaged connector pins
  2. Backed out connector pins
  3. Weak terminal tension
  4. Repair the connectors if necessary.
Did you find and correct a problem?
--
Go to Step 17
Go to Step 16

10

  1. Disconnect the Automatic Transmission Wiring Harness at the TCC PWM Solenoid Valve.
  2. Measure the resistance of the TCC PWM Solenoid Valve.
Is the resistance within the specified range?
10-15ohms
Go to Step 12
Go to Step 15

11

Using the J 39200 DVOM and the J 35616-A Connector Test Adapter kit, measure the resistance between terminal E of the J 39775 Jumper Harness and the transmission case (ground). Measure the resistance between terminal U of the J 39775 Jumper Harness and the transmission case (ground).
Are both readings greater than the specified value?
250ohms
Go to Diagnostic Aids
Go to Step 13

12

  1. Inspect the Automatic Transmission Wiring Harness for an open or short to ground.
  2. Repair the harness if necessary.
Refer to Electrical Diagnosis, Section 8.
Did you find and repair a problem?
--
Go to Step 17
--

13

  1. Disconnect the Automatic Transmission Wiring Harness at the TCC PWM Solenoid Valve.
  2. Measure the resistance between each of the component terminals and the transmission case (ground).
Are both readings greater than the specified value?
250ohms
Go to Step 14
Go to Step 15

14

  1. Inspect the Automatic Transmission Wiring Harness for a short to ground.
  2. Repair the harness if necessary.
Refer to Electrical Diagnosis, Section 8.
Was a problem found and corrected?
--
Go to Step 17
--

15

Replace the TCC PWM Solenoid Valve.
Refer to Torque Converter Clutch Pulse Width Modulation Solenoid Valve Replacement, in On-Vehicle Service.
Is the replacement complete?
--
Go to Step 17
--

16

Replace the PCM.
Refer to Powertrain Control Module Replacement/Programming , Section 6.
Is the replacement complete?
--
Go to Step 17
--

17

  1. After the repair is complete, select DTC.
  2. Select Clear Info.
  3. Ensure the following conditions:
  4. ?€¢
    When you command the TCC PWM Solenoid Valve ON, the voltage drops to zero.


    ?€¢
    When you command the TCC PWM Solenoid Valve OFF, the voltage increases to B+.


    ?€¢
    All conditions met for 5 seconds.

  5. Select Specific DTC and enter DTC P1860.
Has the test run and passed?
--
System OK
Begin diagnosis the again. Go to Step 1

Jun 28, 2016 | Pontiac Cars & Trucks

1 Answer

TCC Release Swith needs to be fix. How do I do it?


Check your bake lights. If they don\'t come on, replace the brake switch (located on the brake pedal arm, under the dash) This is what controls the TCC solenoid off control. The jerk you feel is the transmission downshifting from overdrive to 4th or 3rd, depending on your transmission. If the lights come on, then you need to trace wires to the transmission to the brake switch or ECM.

Apr 06, 2014 | 1996 Chevrolet Cavalier

1 Answer

TCC not engaging


02ff8626-deaa-47b1-9a0e-5b0f4dae4cff.giftorque converter clutch is control by pcm going trought brake switch then to transmission .. have brake tcc brake switch check first.

Sep 21, 2013 | Chevrolet Blazer Cars & Trucks

1 Answer

My 1996 Grand Am. sets code P1864. Car will not shift into overdrive. I was told that the TCC solenoid is at fault. Where is the TCC solenoid located.


It is located in the transmission under the valve body cover on the drivers side of the transmission. It is the solenoid on the bottom left hand side of the valve body. I had to take the suspension and frame support off and lower the transmission before I could remove to valve body cover. A retainer clip holds the TCC solenoid in place.


Thanks.

Mar 15, 2011 | Pontiac Grand Am Cars & Trucks

2 Answers

Wondering what the TCC fault code is


Here are the DTC's for the TCC Solenoid:

DTC P0740 TCC Enable Solenoid Circuit Electrical
DTC P0741 TCC System Stuck Off
DTC P0742 TCC System Stuck On
DTC P0743 TCC Enable Solenoid Circuit Electrical
DTC P0744 Torque Converter Clutch Circuit Intermittent

-KC GTO Dad

Sep 17, 2009 | 2002 Pontiac Grand Prix

1 Answer

1996 chevy cavalier DIAGNOSTIC CODES


TCC is torque converter clutch circuit which helps tranny shift smoother and is in front off tranny.
$250
Random cyl miss. Most likely bad plug wire or faulty coil pack $45
Transmision pressure switch sends info to computer about tranny pressure and the switch controls it. $400

Aug 27, 2009 | 1996 Chevrolet Cavalier

1 Answer

96 grand am gt 3.1 v6


HI.OK THE TRANSMISSION IN YOUR GRAND AM IS EITHER A 3T40 OR A 3T45.THE TRANSMISSION SHIFT SOLONIDS (YES THERE ARE 2, GOOD JOB) ARE LOCATED IN THE UPPER VALVE CONTROL,LOCATED UNDER THE TRANS SIDE COVER . THIS COVER IS ON THE PASSENGER SIDE IF THE TRASMISSION AND IS BEST VIEWED BY REMOVING THE PASSEMGER SIDE TIRE AND PLASTIC MUD GUARD.MY QUESTION TO YOU IS WHY GOING AFTER THE SOLONOIDS.I HAVE DONE MANY OF THESE TRANSMISSIONS AND HARDLY GO BAD.ANY WAY THE TRICK TO GRTTING THE SIDE COVER OFF IS TO LOWER THE PASSENGER SIDE IF THE ENGINE CRADLE DOWN AS LOW AS POSSIBLE.ONCE THE COVER IS REMOVED THE SOLONOIDS ARE RIGHT THERE,THERE IS ALSO A PCS SOLONOID AND A TCC SOLONOID (THEY WILL LOOK DIFFERENT THAN THE 2 IDENTICAL SHIFT SOLONOIDS) THEY WILL BE HELD IN PLACE W/BOBBY PIN TYPE CLIPS.GOOD LUCK SORRY FOR THE CAP LETTERS (IM SUCH A ******) RAY

Jun 21, 2009 | 1996 Pontiac Grand Am

1 Answer

Eng light comes on and code 1887


The code P1887 is an indication of a malfunction with the TCC release switch.
The Torque Converter Clutch (TCC) release switch is part of the Automatic Transmission Fluid Pressure Manual Valve Position Switch (TFP Val. Position Sw.). The TFP Val. Position Sw. is mounted to the transmission valve body. The switch is normally-closed. The switch signals the Powertrain Control Module (PCM) that the TCC is released. This is accomplished by Torque Converter release fluid pressure acting on the switch contact, thus opening the switch. When the voltage is high on the circuit, the Powertrain Control Module recognizes that the TCC is no longer engaged.
When the PCM determines that the TCC release switch is open (indicating that the TCC is not applied) and the TCC slip speed indicates that the TCC is applied, then DTC P1887 sets.

Oct 04, 2008 | 1996 Chevrolet Cavalier

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