Question about 1998 Mercury Sable

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Diagnostic said the ecm ,.engine control module was change the transmission its runing fine now but service engine light its still on

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IS the engine light for another issue? or it just needs to be reset.

Posted on Feb 03, 2010

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Shift light flashing no OD Changed Trans ecm/pcm shift hold light button, coil No change. CYL missfire, 2 & 3 Diagnostics code on Trans is u0401 Invalid data received from ecm/pcm/a


Circuit Description
Modules that are connected to the shared communication circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. The modules have pre-recorded information about what messages are needed to be exchanged on the serial data circuits for each virtual network. The messages are usually supervised and some periodic messages are used by the receiver module as an availability indication of the transmitter module.

DTC U0401 TCM received invalid data from ECM
Conditions for Setting the DTC
The transmission control module (TCM) detects an invalid throttle position signal, engine speed signal and/or engine coolant temperature signal for more than 2 seconds.

Action Taken When the DTC Sets
• The TCM will store the DTC when a failure is detected on the first ignition cycle.
• The TCM will illuminate the HOLD lamp.
• The TCM can no longer determine the validity of any information it may or may not receive from the engine control module (ECM). Therefore the TCM substitutes default values for engine speed, throttle position, and other engine data signals.
• Transmission operation will be reduced, affecting shift points, torque converter clutch operation, and other driveability concerns.

Diagnostic Aids
• An intermittent malfunction may be caused by a fault in the electrical circuit. Inspect the wiring harness and the components for an intermittent condition. Refer to Intermittent Conditions in Engine Controls 1.6L.
• Repair any electrical circuit faults that were found. Refer to Wiring Repairs in Wiring Systems.
• Faulty ECM and/or TCM

Install a scan tool.
Turn ON the ignition, with the engine OFF.
Save the DTC and Freeze Frame information into the scan tool memory.
Perform the scan tool Clear DTC Information function for the transmission control module (TCM) and the engine control module (ECM).
Operate the vehicle for 1 minute or until the MIL illuminates.
Check the TCM for DTCs.
Is the Malfunction Indicator Lamp (MIL) On?
--
YES - Go to Step 2
NO - Repair the wiring connectors for intermittent failure

Select request DTC status from the Diagnostic Trouble Codes Information menu
Request DTC by status
Is DTC U0401 displayed?
--
YES - Go to Step 3
NO - Repair the wiring connectors for intermittent failure
3
Turn OFF the ignition.
Disconnect connector A from the TCM.
Turn the ignition ON, with the engine OFF.
Measure the resistance between terminal A17 of the TCM wiring connector and terminal K14 of the ECM wiring connector.
Measure the resistance between terminal A7 of the TCM wiring connector and terminal K15 of the ECM wiring connector.
Was the resistance the specified value for both circuits?
0 ohms
YES - Go to Step 5
NO - Go to Step 4

Mar 19, 2016 | 2005 Chevrolet Aveo

1 Answer

I have a 2004 envoy xuv and my service 4wd light came on but I don't have any lights on the switch and it won't change into anything and I don't hear anything trying to engage and lights don't blink


The Automatic Transmission Diagnostic System Check is an organized approach to identify a problem created by an automatic transmission. The Diagnostic System Check - Engine Controls in Engine Controls - 4.2L or Diagnostic System Check - Engine Controls in Engine Controls - 4.8L, 5.3L and 6.0L is the diagnostic starting point for an automatic transmission complaint. The Diagnostic System Check - Engine Controls in Engine Controls - 4.2L or Diagnostic System Check - Engine Controls in Engine Controls - 4.8L, 5.3L and 6.0L directs you to the next logical step for diagnosing a transmission concern. Perform this check only if there is a driveability complaint or if you have been directed here from another service information section.
Follow the table to help reduce diagnostic time and help prevent unnecessary replacement of good parts.
  1. Install a scan tool.
  2. Important: Check for applicable service bulletins before proceeding with this test. Perform this test only if there is a driveability complaint or if you have been directed to this table from another section in the service information.
    Important: Do not turn the ignition OFF when performing this diagnostic procedure. Do not clear the DTCs unless instructed by this diagnostic procedure.
  3. Turn ON the ignition, with the engine OFF.
Does the scan tool turn ON?
--
Go to Step 2
Go to Diagnostic Starting Point - Data Link Communications in Data Link Communications

2
Is the MIL ON?
--
Go to Step 3
Go to Malfunction Indicator Lamp (MIL) Inoperative in Engine Controls - 4.2L or Malfunction Indicator Lamp (MIL) Inoperative in Engine Controls - 4.8L, 5.3L and 6.0L

3
Attempt to establish communication with the PCM controller module or modules.
Does the scan tool communicate with the PCM control module or modules?
--
Go to Step 4
Go to Diagnostic Starting Point - Data Link Communications in Data Link Communications

4
Important: Diagnostic Trouble Codes (DTCs), engine performance, and transmission default actions can greatly affect the transmission performance. Ensure that these items are not the cause of a transmission concern.
Use the scan tool Capture Info function in order to save or capture (Store Info) any DTC Information.
Are there any DTCs present?
--
Go to Diagnostic Trouble Code (DTC) List/Type
Go to Symptoms - Automatic Transmission
Your best bet is take to transmission repair shop or the dealer

Dec 04, 2015 | Cars & Trucks

1 Answer

What is code p0727


Possible causes
- Faulty Crankshaft Position (CKP) Sensor
- Crankshaft Position (CKP) Sensor harness is open or shorted
- Crankshaft Position (CKP) Sensor circuit poor electrical connection
- Communication error between the Engine Control Module (ECM) and Transmission Control Module (TCM)

The P0727 Codes is triggered when the TCM receives no signal from the ECM.
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P0727 Description
The Engine Control Module (ECM) monitors the engine speed through the Crankshaft Position (CKP) sensor with the engine running, and send signal to the Transmission Control Module (TCM).


May 06, 2015 | Cars & Trucks

1 Answer

I have grand cherokee 2001 limited the code p0700 is apper the gear is started scend shift espically in morinig


possible causes
Shorted or open circuit within Transmission Control Module (TCM)
- Faulty Transmission Control Module (TCM)
symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Driveability problems
- Transmission shifting problems
p0700 description
The transaxle Control Module (TCM) monitors the malfunction of sensors and actuators relating to transaxle control. When the TCM detects a malfunction with the control, a signal is send to the Engine Control Module (ECM) to trigger the Engine Light or Service Engine Soon light. The ECM stores the P0700 code and it means the TCM detected a malfunction with the transaxle controls.

Read more: http://engine-codes.com/p0700_jeep.html#ixzz2hihK6PVo

Oct 14, 2013 | 2001 Jeep Grand Cherokee

1 Answer

2000 galantwhat is codep0715


P0715 MITSUBISHI - Input/Turbine Speed Sensor Circuit Malfunctionpdf.gif? comments.gif ' Add Commentxicon.jpghttp://engine-codes.com/p0715_mitsubishi.htmlForum CodePossible causes - Transmission speed sensor circuit is open or shorted
- Transmission speed sensor circuit poor electrical connection
- Faulty transmission speed sensor
help.png Help with thisWhen is the code detected?Diagnostic Trouble Code (DTC) P0715 is detected when TCM or ECM does not receive the proper signal from the sensor.Symptoms- Engine Light ON (or Service Engine Soon Warning Light)
- Possible shifting problemsP0715 MITSUBISHI Description The input speed sensor detects the primary pulley revolution speed and sends a signal to the Transmission Control Module (TCM) and Engine Control Module (ECM).
Need more help?Do you need more help with the P0715 MITSUBISHI code? ask a question to our users or search the top hand picked automotive forums for more information

Read more: http://engine-codes.com/p0715_mitsubishi.html#ixzz2QYRb9Yyu
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Apr 14, 2013 | 2006 Honda Accord

1 Answer

PO 700 code i dont know what needs to be fix


Please read the explanation below. This is a transmission issue.

P0700 HONDA Description The Transmission Control Module (TCM) monitors the malfunction of sensors and actuators relating to transmission control. When the TCM detects a malfunction with the control, a signal is send to the Engine Control Module (ECM) to trigger the Engine Light or Service Engine Soon light. The ECM stores the P0700 code and it means the TCM detected a malfunction with the transmission controls.

Jul 25, 2012 | 2001 Honda Accord

2 Answers

Check engine light indicates p700 code


Diagnostic Test Code (DTC) P0700 is an informational code that is stored in the Engine Control Module (ECM) That informs the diagnostic technician that there are codes present in the Transmission Control Module (TCM) and that the TCM has requested the Malfunction Indicator Lamp (MIL) (AKA - Check Engine Light) to be turned on. This is because the MIL is controlled by the ECM and cannot be turned on directly by the TCM. So, the TCM requests the ECM to turn the light on. To find out the nature of the failure that caused the P0700, one must scan the TCM to retrieve the fault codes stored there. Please note that MOST generic OBD code readers cannot access the TCM - this is the reason for the P0700 code to set in the ECM (to alert somebody with a generic code reader that further diagnosis is needed for the TCM).

Feb 16, 2012 | 2000 Jeep Cherokee

2 Answers

Ford trauras trouble code 732 - was told transmission code 732 was being produced, what does a code 732 say?


P0732 FORD - Incorrect Second Gear Ratio
Transmission in second gear and the ECM detected an incorrect gear ration. This diagnosis monitors actual gear position by checking the torque converter slip ratio calculated by Transmission Control Module (TCM) as follows:

Torque converter slip ratio = A x C/B

A: Output shaft revolution signal from revolution sensor
B: Engine speed signal from Engine Control Module (ECM)
C: Gear ratio determined as gear position which TCM supposes

If the actual gear position is higher than the position (2nd) supposed by TCM, the slip ratio will be more than normal. In case the ratio exceeds the specified value, TCM judges this diagnosis malfunction.

Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Incorrect transmission shifting

Possible causes
- Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Transmission mechanical problems
- Transmission hydraulic control circuit

Tech notes
Start by inspecting the transmission fluid level and condition, and change fluid if necessary.


Hope helps.

Apr 26, 2011 | Ford Taurus X Cars & Trucks

1 Answer

I have a 2001 daewoo nubira and my obd II scanner gave me the code of P1627 can any one assist me with this problem.


Code P1627 description is as follow: TCM/transmission control module/ or ECM/engine control module/ convertion malfunction.If your Nubira has automatic transmission and do not moved - change TCM. If there is any engine problem-change ECM. Use your OBD || scanner to delete trouble code and check again/make new diagnostic test after few minutes.If come again-go to change.

Jan 12, 2010 | 2001 Daewoo Nubira

1 Answer

Transmission not changing as it should gets in and out of sec ond gear changed oil and filter pan was not too filthy looks normal sometimes it looks like it will be all right and then it failes again


Does the Check Engine light come ON when this happens? Whenever the "Check Engine" light comes on, there is always a DTC (Diagnostic Trouble Code) stored in the ECM (Engine Control Module). You'll need an OBDII (On-Board-Diagnostics) scanner to retrieve any codes recorded/set in ECM. Once you do this and let us know what, if any codes are set, then we can go from there.

Apr 13, 2009 | 1994 Hyundai Excel

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