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Electronic control unit internal malfunction

Transmission will not shift to higher gear till engine warms up.had codes checked at parts store,( front right and left and right rear wheel speed signal malfunction , electronic control unit internal malfunction ,under voltage ,and multiple misfire cylinder 5 and 6

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 512 Answers

SOURCE: Transmission won't shift out of 1st gear

the output spped sensor is on the drivers side rear of the transmission case..its a 2 wire connector..the wires are dark bluewith a black tracer and light green with a white tracer

Posted on Oct 01, 2008

  • 55 Answers

SOURCE: fault code P0720

code po720 is the output speed sensor malfunction

Posted on Jan 29, 2009

  • 53 Answers

SOURCE: 1999 grand cherokee laredo 4.0 and auto trans wont downshift

The Transmission Control Module also turns on the check engine light. However the parts store won't be able to read these codes since all they read are the Engine DTC's. More then likely your codes will come back to a Governor Pressure Sensor and/or Switch. If they do then remove the pan and replace both of those. Simple fix, should be able to be done in about an hour or so. Might as well go ahead and slap a speed sensor in while you're under there. Should be able to do it yourself for less then $200.

Posted on Dec 20, 2009

ronaldo_ross
  • 1056 Answers

SOURCE: Jeep Grand Cherokee 2.7CRD (2004) auto won't change gear

check all the fuses before you do anything else. After all a fuse provides power to the electronic box that controls the transmission. Other than that I would not advice on a more complicated troubleshooting since there is no way for you to test a bad transmission computer, even mechanic shops don't know how to test them. The only thing they would do is slap a known good one and see what happens.

Posted on Dec 27, 2009

wracefans24
  • 1985 Answers

SOURCE: proper way to check transmission fluid

You always check transmission fluid with it running and in park,If your dip stick has a place on it for cold use it cold,Other wise it should be on the full mark,you might want to look under your jeep for any new leaks!

Posted on Dec 29, 2009

Testimonial: "thanks alot, thats what I thought, no leaks that I can see, I guess they didn't fill it all the way back up"

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1 Answer

My speedometer isn't working in my Acura mdx 2005 and it won't shift outta first gear ?!


the speedometer is more then likely due to a fauly speed sensor on the transmission, presuming your check engine light is on, try resetting ecu by removing battery cables for 5 mins, then plugging them back on battery, ensure you have radio code before doing so to avoid locking the radio if it is still the stock radio, if problem is not resolved check engine codes for possible fault shift solenoids, also ensure there is enough transmission fluid, to check turn the car on let run for 10-15 mins to warm up oil, block the wheels and place transmission in neutral and verify correct level of oil, if no codes present and oil at right level, suspect a faulty torque converter in the transmission.

Jan 17, 2017 | 2005 Acura MDX

1 Answer

2006 Chevy equinox transmission. Making a dull whirring noise in 4th & 5th gear.automatic 5 speed transmission.On a 2006 Chevy Equinox.


It could a wheel bearing. See if the noise gets louder at higher speeds. If it does trying jiggling the steering wheel (in a safe manner) from left to right and see if the noise gets higher or lower. If it does then you have a front wheel bearing that is bad. If not then if could be a rear wheel bearing. If none of these apply to you then try checking your transmission fluid level and fluid condition. It is posible you could have an internal transmission issues. The fluid should be bright red. If brown or black I would consider taking it to a transmission shop to it further looked into.

Jul 22, 2014 | Cars & Trucks

1 Answer

Abs on vr commodore light stays on solutions


Error logs are a great thing. They will help you find intermittent problems and start you off in a general direction of where a problem could be. There is a great level of detail on the justcommodores site on checking error codes logged by the engine management system, but this does not detail anything about the abs system. The abs warning light is not as common as the check engine warning light. Reading through the posts, I haven't found any detail on checking error codes logged by the abs system.

So here it is. For those of you familiar with checking the engine error codes, this procedure is so simple its not funny.

Basically, to check the engine error log, you bridge the 5th (ground) and 6th pins in the ODB connector under the steering wheel.

To check the ABS error log, using the same trusty calibrated paper clip, you simply bridge pins 5 and 12 of the connector.

To find pins 5 and 12, start at the top left hand corner. That is pin one. Going to the right, you count pin 2,3,4 etc. Once you get to the end, jump back to the start of the bottom left level of pins and keep counting. Pin 5 is about halfway along the top row, pin 12 is a little left of the middle in the bottom row.

Reading the error codes is the same procedure (counting the flashes), except now, the ABS light flashes (as opposed to the engine light when checking the engine codes).

The ABS log also uses code 12 firstly, with any errors logged shown after that. If no errors are logged, the 12 will flash again.

Error codes for the ABS error log (VR/VS) are as follows:

12 Diagnostic system operational
21 Right hand front wheel speed sensor fault
23 Right hand front wheel speed sensor continuity fault
25 Left hand front wheel speed sensor fault
27 Left hand front wheel speed sensor continuity fault
28 Wheel speed sensor frequency error
31 Right hand rear wheel speed sensor fault
33 Right hand rear wheel speed sensor continuity fault
35 Left hand rear wheel speed sensor fault
37 Left hand rear wheel speed sensor continuity fault
41 Right hand front inlet solenoid valve circuit fault
42 Right hand front outlet solenoid valve circuit fault
45 Left hand front inlet solenoid valve circuit fault
46 Left hand front outlet solenoid valve circuit fault
55 Rear inlet solenoid valve circuit fault
56 Rear outlet solenoid valve circuit fault
61 Pump motor relay circuit fault
63 Valve relay circuit fault
71 ABS control module internal fault

The above guide has been verified on a VR/VS. Checking the error log on all models prior to VR/VS is the same for the engine log, and I would assume that the same can be said for the ABS log, would be happy if someone could verify this for me.

Sep 21, 2013 | 2005 Mazda Tribute

1 Answer

How many qts of oil do i need


Depends on your engine.

1980 JEEP CJ-7 2.5L 4-cyl Engine Code [B]
CAPACITIES
Engine, GM without filter..........2.4 quarts[1]
Wix Filter ........ 51040
Cooling System, Initial Fill..........8.0 quarts
Automatic Transmission, A904, 30RH Initial Fill..........4.0 quarts[2]
Automatic Transmission, A999, 32RH Initial Fill..........4.0 quarts[2]
Automatic Transmission, Total Fill
3 speed A999, 32RH..........8.4 quarts
3 speed A904, 30RH..........7.0 quarts
Manual Transmission, 4-SPD, SR-4..........3.0 pints
Manual Transmission, 4-SPD, T176..........3.6 pints
Differential, Front..........2.5 pints[3]
Differential, Rear..........4.9 pints
Transfer Case,..........4.0 pints

1. Add extra oil when replacing filter. After refill check oil level.
2. With engine automatic transmission operating temperature, shift through all gears.
Check fluid level in NEUTRAL and add fluid as needed.
3. 1984-1992 Models with command-Track, add 5 oz of 75W-90 GL-5 to shift motor housing opening.

TORQUES
Oil Drain Plug.....25 ft-lbs
Manual Transmission T176
Fill Plug.....15 ft-lbs
Drain Plug.....15 ft-lbs
Manual Transmission SR4
Fill Plug.....20 ft-lbs

1980 JEEP CJ-7 4.2L 6-cyl Engine Code [C]
CAPACITIES
Engine, without filter..........5.0 quarts[1]
Wix Filter..... 51522
Cooling System, Initial Fill..........11.0 quarts
Automatic Transmission, A904, 30RH Initial Fill..........4.0 quarts[2]
Automatic Transmission, A999, 32RH Initial Fill..........4.0 quarts[2]
Automatic Transmission, Total Fill
3 speed A999, 32RH..........8.4 quarts
3 speed A904, 30RH..........7.0 quarts
Manual Transmission, 4-SPD, SR-4..........3.0 pints
Manual Transmission, 4-SPD, T176..........3.6 pints
Differential, Front..........2.5 pints[3]
Differential, Rear..........4.9 pints
Transfer Case,..........4.0 pints

1. Add extra oil when replacing filter. After refill check oil level.
2. With engine automatic transmission operating temperature, shift through all gears.
Check fluid level in NEUTRAL and add fluid as needed.
3. 1984-1992 Models with command-Track, add 5 oz of 75W-90 GL-5 to shift motor housing opening.

TORQUES
Oil Drain Plug.....30 ft-lbs
Manual Transmission T176
Fill Plug.....15 ft-lbs
Drain Plug.....15 ft-lbs
Manual Transmission SR4
Fill Plug.....20 ft-lbs

1980 JEEP CJ-7 5.0L 8-cyl Engine Code [H]
CAPACITIES

Engine, without filter..........4.0 quarts[1]
Wix Filter..... 51258
Cooling System, Initial Fill..........13.0 quarts
Automatic Transmission, A999, 32RH Initial Fill..........4.0 quarts[2]
Automatic Transmission, A904, 30RH Initial Fill..........4.0 quarts[2]
Automatic Transmission, Total Fill
3 speed A904, 30RH..........7.0 quarts
3 speed A999, 32RH..........8.4 quarts
Manual Transmission, 4-SPD, SR-4..........3.0 pints
Manual Transmission, 4-SPD, T176..........3.6 pints
Differential, Front..........2.5 pints[3]
Differential, Rear..........4.9 pints
Transfer Case,..........4.0 pints

1. Add extra oil when replacing filter. After refill check oil level.
2. With engine automatic transmission operating temperature, shift through all gears.
Check fluid level in NEUTRAL and add fluid as needed.
3. 1984-1992 Models with command-Track, add 5 oz of 75W-90 GL-5 to shift motor housing opening.

TORQUES
Manual Transmission T176
Fill Plug.....15 ft-lbs
Drain Plug.....15 ft-lbs
Manual Transmission SR4
Fill Plug.....20 ft-lbs

Oilman

Feb 02, 2013 | 1984 Jeep CJ7

1 Answer

How to find codes for check engine light on


Check Engine Light Codes and Meanings
Long blinks Short blinks Problem
1 1 Camshaft position sensor
1 2 Mass air flow sensor
1 3 Engine coolant temperature sensor
1 4 Speed sensor
1 11 EVAP control system (flow)
1 14 Fuel injection system right bank (too rich)
1 15 Fuel injection system right bank (too lean)
2 1 Ignition circuit
2 3 Closed throttle position switch
2 5 Idle speed control
2 9 Fuel Injection system left bank (too rich)
2 10 Fuel Injection system left bank (too lean)
3 1 ECU
3 2 Exhaust gas recirculation system flow problem
3 3 Front left O2 sensor
3 4 Knock sensor
3 5 Exhaust gas recirculation temperature sensor
3 6 EGRC-BPT valve
3 7 Closed loop control
3 8 Closed loop control
4 1 Air intake temperature sensor
4 2 Fuel tank temperature sensor
4 3 Throttle position sensor
4 7 Crankshaft position sensor
5 3 Front right O2 sensor
5 4 Automatic transmission control unit
6 3 Cylinder #6 misfire
6 4 Cylinder #5 misfire
6 5 Cylinder #4 misfire
6 6 Cylinder #3 misfire
6 7 Cylinder #2 misfire
6 8 Cylinder #1 misfire
7 1 Multiple cylinder misfire
7 2 Three way catalytic converter (right side)
7 3 Three way catalytic converter (left side)
7 4 Evaporative emission control system pressure sensor
7 5 Evaporative emission control system
7 7 Rear O2 sensor
8 1 Vacuum cut valve bypass valve
8 2 Crank position sensor
8 3 Absolute pressure sensor
8 4 Automatic transmission control unit
8 6 Evaporative emission canister purge control solenoid valve
8 7 Evaporative emission Canister purge control solenoid valve circuit
9 1 Front Right O2 sensor
9 3 Evaporative emission Canister vent control valve
9 5 Crankshaft position sensor
9 8 Engine coolant temperature sensor
10 1 Front left O2 sensor
10 3 Park and Neutral position switch
10 5 EGRC solenoid valve
10 8 Evaporative emission canister purge volume control valve
11 1 Inhibitor switch
11 2 Revolution sensor
11 3 Improper shifting to first gear (Automatic transmission)
11 4 Improper shifting to second gear (Automatic transmission)
11 5 Improper shifting to third gear (Automatic transmission)
11 6 Improper shifting to fourth gear (Automatic transmission)
11 7 Solenoid valve lock up function
12 1 Shift solenoid B (Automatic transmission)
12 3 Overrun clutch solenoid valve (Automatic transmission)
12 4 Torque converter clutch solenoid valve (Automatic transmission)
12 5 Line pressure solenoid valve (Automatic transmission)
12 6 Throttle position sensor (Automatic transmission)
12 7 Engine speed signal
12 8 Fluid temperature sensor
13 2 MAP/BARO Switch Solenoid Valve
13 5 Fuel pump control module
13 8 Cooling fan

Dec 12, 2011 | 1995 Nissan Maxima

1 Answer

At 70 mph the abs and parking brake light turn on and the the transmission loose presion and stop working, whe you stop the engine looks like the problem is reseted and work again, but then the problem...


Rear speed sensor fails at higher speeds. ecm cant tell what gear to go to and abs looses rear wheel speed. When you start over it sees speed till it hits the higher speed. Been there done that. :-)

Jun 06, 2011 | 2002 Chevrolet Silverado 2500HD

2 Answers

I have a 2000 chrysier town & country 3.8 it shifts gears sometimes and then it is stuck in one gear can anyone help?


It sounds like you are either low on transmission fluid, or you have a shift solenoid or TCC Solenoid that is failing. Check the transmission fluid level when the engine is warmed up. If the fluid is at the correct level, see if your check engine light is on. If the CEL light is on, you probably have a failed Solenoid Valve. Have the code checked to find out which solenoid is faulty.

May 24, 2011 | 2000 Chrysler Town & Country

3 Answers

My van shifts fine into everything, but once i am driving it will not shift out of 2nd gear


I would bet the check engine light is on also?

The transmission will default into second gear any time there is a problem with the transmission, also referred to as limp mode. The engine computer will usually have a P0700 code which indicates there is a code stored in the transmission computer. You will need a higher end scan tool to read transmission codes or you can call your local auto parts store to see if they can read them for you. The codes will help narrow down the possibilities.

The two most common causes for this are the input and output speed sensors.

Nov 30, 2010 | 2001 Chrysler Town & Country

3 Answers

1999 grand cherokee laredo 4.0 and auto trans wont downshift


call the jeep dealer with v.i.n. number so you can get the right speed sensor and just install in the rear of your transmission. will only take about 10 min. to change

Jul 09, 2009 | 1999 Jeep Grand Cherokee

1 Answer

The transmission wont shift out of 2nd gear again.


i can answer part of your question. the front wheel speed sensors are for abs and trac control only. these will not affect the speedo your problem is some where else. sorry i have not had this prob yet good luck. you could have to replace the rear wheel speed sensor again. they are not that good. and after market are even worse.

Nov 23, 2008 | 2006 Dodge Ram 1500

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