Question about 1996 Chevrolet K1500

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I am working on 1996 Chev. K1500 4x4 5.7L. I have DTC P1860 and P1864 just wondering if you have had this problem before and if so what was the repair?

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  • cwpm410 Nov 25, 2008

    I have the same problem I have a 1996 chevy k1500 silverado and the codes p1860 and p1864 show up. I am wondering how to replace the solenoid. and what else should i do in order to keep this from happening again. my email is cwpm410@hotmail.com if you dont mind replying with some advice. thanks a lot!


  • gator1_6 Mar 16, 2009

    1996 Chev. K1500 4x4 5L. I have DTC P1860 and P1864 just wondering if you have had this problem before and if so what was the repair?

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I have almost same problem only i have 1860 and 1886
something to do with solenoids possibly or pcm no good
someone else said check voltage on ignition if i have any luck i'll post if u have any luck please post
hopefully not the tranny itself

Posted on Aug 29, 2008

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I have a 2001 aurora and code p1860 p1860 came up what is this and how much to fix


P1860 All GM - TCC (transmission Torque Converter Clutch) PWM Solenoid Circuit Electrical.
P1860 Description The Torque Converter Clutch Pulse Width Modulation (TCC PWM) solenoid valve controls the fluid acting on the converter clutch valve. The converter clutch valve controls the TCC application and release. The solenoid attaches to the control valve body within the transmission. The solenoid receives ignition voltage through circuit 239. The Powertrain Control Module (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 is the code detected? When the PCM detects a continuous open, short to ground or short to power in the TCC PWM solenoid valve circuit, then DTC P1860 sets. DTC P1860 is a type B DTC.

Possible causes - Faulty Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid
- Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid harness is open or shorted
- Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid circuit poor electrical connection. Unless you have a factory manual and very good auto repair skills this is best left to an expert. It is a messy dirty job that requires removing the parts inside the transmission for testing..

Aug 23, 2016 | Cars & Trucks

1 Answer

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

2001 Chevy S10 4x4 4L60E transmission works perfectly until 50MPH then I lose 3rd and 4th gear, 1st, 2nd and reverse are normal. Never happenend before, been parked since. Fluid is clean. Any ideas?


Are there any DTC's - diagnostic trouble codes ?in the PCM / BCM ? You have third an fourth below 50 mph but above 50 it down shifts to 2nd gear ,is this what your saying or you don't have 3rd or 4th gears at all ? Which engine did yours come with ? 2.2 L or 4.3 L You trans can set several DTC'S an not all will turn on the check engine light .
DTC B2722 (4.3 L) DTC P0218 (2.2 L) DTC P0218 (4.3 L) DTC P0502 (2.2 L) DTC P0502 (4.3 L) DTC P0503 (2.2 L) DTC P0503 (4.3 L) DTC P0705 (2.2 L) DTC P0706 (4.3 L) DTC P0711 (2.2 L) DTC P0711 (4.3 L) DTC P0712 (2.2 L) DTC P0712 (4.3 L) DTC P0713 (2.2 L) DTC P0713 (4.3 L) DTC P0719 (2.2 L) DTC P0719 (4.3 L) DTC P0724 (2.2 L) DTC P0724 (4.3 L) DTC P0740 (2.2 L) DTC P0740 (4.3 L) DTC P0741 (4.3 L) DTC P0742 (2.2 L) DTC P0742 (4.3 L) DTC P0748 (2.2 L) DTC P0748 (4.3 L) DTC P0751 (2.2 L) DTC P0751 (4.3 L) DTC P0752 (4.3 L) DTC P0753 (2.2 L) DTC P0753 (4.3 L) DTC P0756 (2.2 L) DTC P0756 (4.3 L) DTC P0757 (4.3 L) DTC P0758 (2.2 L) DTC P0758 (4.3 L) DTC P0785 (2.2 L) DTC P0785 (4.3 L) DTC P1810 (2.2 L) DTC P1810 (4.3 L) DTC P1860 (2.2 L) DTC P1860 (4.3 L) DTC P1870 (2.2 L) DTC P1870 (4.3 L) DTC P1875 (4.3 L) .
Shift Pattern This category contains the following topics:
?€¢
One forward gear only


?€¢
Two forward gears only


?€¢
Gear missing or slipping


?€¢
No upshift or slipping upshift


?€¢
No downshifts


?€¢
Non-First gear start


?€¢
Refer to First Gear Range Only - No Upshift .


?€¢
Refer to Third Gear Only .


?€¢
Refer to Second/Third Gear Only or First/Fourth Gears Only .


?€¢
Refer to Slips in First Gear .


?€¢
Refer to Slipping or Harsh 1-2 Shift .


?€¢
Refer to No 2-3 Shift or 2-3 Shift Slips, Rough or Hunting .


?€¢
Refer to No 3-4 Shift, Slips or Rough 3-4 Shift .


?€¢
Refer to No Part Throttle or Delayed Downshifts .


?€¢
Refer to Second Gear Start .

Feb 18, 2016 | Cars & Trucks

1 Answer

How do I clear the code1860 on my Chevy venture 3.4 so it will pass smog


Replace the TCC solenoid in the transmission !
Ignition voltage is provided to the torque converter clutch pulse width modulation (TCC PWM) solenoid valve. The PCM controls the solenoid with a negative duty cycle in order to control application and release of the TCC. When the solenoid is commanded OFF, the PCM senses high voltage.When the solenoid is commanded ON, the PCM senses low voltage.
DTC P1860 sets if the PCM detects a voltage that is outside of the calibration limits. DTC P1860 is a type B DTC .
Do you know what the TCC is ?

Sep 03, 2015 | Cars & Trucks

1 Answer

My 1996 Gmc Jimmy 4wheel drive was driving fine till one day i noticed the car was dragging,. well i noticed the gear shifter indicator not lit up showing what gear its in. Before i was able to turn key...


I would suggest you go to a competent trans shop that is trustworthy .They should be able to diagnose the problem . If you keep driving it like that you blow it up for sure. Good luck Bill (also ask for your money back)

Jan 06, 2015 | Cars & Trucks

1 Answer

Codes p1860 p1864 p1886 are showing up on my 1996 GMC sierra it has to be manually shifted then when put in park it get stuck and wont go back in gear the shifter will not move Also I replaced computer and...


Replacing the computer won't fix anything if there is sensors triggering a fault If you punch in google the code number (called an obd2 code) it will tell you what sensors are being triggered usually it will turn out a misfire or o2 sensor it will always trigger if the sensor is faulty as for the shifting i couldn't tell you check the codes on google

Apr 02, 2014 | Cars & Trucks

1 Answer

1996 chevy k1500 code keeps comming up p1860 where should I start to fix it ?


Google the P1860 along with your vehicle year,make etc &
see what the various sites & peoples questions come up with

Lost out there to read & study

I will tell you that from what you typed, you won't
be working on it yourself at home with no experience

Jan 31, 2013 | 1996 Chevrolet S-10 Pickup

1 Answer

I have a 2001 caddy deville that i am buying there is a code that comes up P1860 can you tell me what that is Thank you Paul


Circuit Description with 4T80-E Automatic Transaxle
Ignition voltage is provided to the torque converter clutch pulse width modulated (TCC PWM) solenoid valve. The PCM controls the ON and OFF time of the solenoid by providing a ground through the output driver module (ODM) . The PCM uses a PWM duty cycle, in order to control application and release of the TCC. When the solenoid is commanded OFF, the PCM senses high volts. When the solenoid is commanded ON, the PCM senses low volts. If the PCM detects a continuous open, short to ground or short to voltage in the TCC PWM solenoid valve circuit, then DTC P1860 sets. DTC P1860 is a type B DTC.

Conditions for Running the DTC
  • The system voltage is 8-18 volts
  • The engine run time is greater than 5 seconds.
  • The TCC PWM solenoid valve duty cycle is 10% or less or 90% or greater.
Conditions for Setting the DTC
The TCC PWM solenoid valve feedback circuit indicates a continuous open, short to ground or short to voltage for 4.3 seconds.

Sep 23, 2010 | Cadillac DeVille Cars & Trucks

1 Answer

I have a 96 grand am gt 3.1 . i scanned the comp nad i have codes p0171, p0300, p1675, and p1864 can you help me with what these are


po171--system to lean bank 1, po300--random/multible missfire detected, p1675--manufacturer control auxilary inputs and auxilary outputs, manufacturer control transmission--p1864.

Jun 14, 2009 | 1996 Pontiac Grand Prix

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