DTC P0700 Transaxle Control Module Malfunction

Diagnostic Trouble Code (DTC) P0700

Transaxle Control Module Malfunction



Circuit Features



  • The serial data link circuit connects both the Transmission Control Module (TCM) and the Engine Control Module (ECM).
  • Every 100 milliseconds the TCM sends a Class-II P-code status message to the ECM.
  • This is done to verify and check if the transmission is working fine.
  • A P-code status message will be sent to the ECM by the TCM in case it finds either an A- or B-type malfunction within the transmission.
  • As soon as the ECM gets this message it will immediately to turn the Malfunction Indicator Lamp (MIL) ON and set DTC P0700.





When will DTC set?


Task boosted after DTC sets

When will DTC clear?

DTC sets when

1) The ECM receives a message from the TCM indicating malfunction is detected by it.


1) The Malfunction Indicator Lamp (MIL) will be seen to glow.

1) A history DTC will clear after 40 consecutive warm-up flawless cycles.


2) Fuel level sensor output < 85% of sensor reading scale in case of SOHC.



2) The ECM will begin to record operating conditions when the diagnostic fails.

2) All DTC(s) can be cleared by using the scan tool.

3) Fuel level sensor output < 98% of sensor reading scale in case of DOHC.

3) This data will be stored in the Freeze Frame and Failure Records will be boosted.


3) If the ECM battery feed is de-linked for more than 10 seconds.



4) A history DTC is stored.









Assistance in Diagnostic

  • A poor connection, rubbed-through wire insulation or a wire broken inside the insulation may cause an intermittent.
  • In that case you need to examine for an ill connection or damaged ECM/TCM harness.
  • Probe the serial data link circuit for the following conditions:


1)       Improper mating

2)       Broken locks

3)       Improperly formed

4)       Damaged terminals

5)       Poor terminal-to-wiring connections

6)       Physical damage to the wiring harness









DTC P0700 - Transaxle Control Module Malfunction








Undertake an EOBD system check.


Task Over?



Look up  Step 2

Look up 

"On-Board Diagnostic System Check"


  1. Attach a scan tool to the Data Link Connector (DLC).
  2. Switch ON the bignition.
  3. With the help of a Scan Tool selesct Transmission Control Module (TCM) Diagnostic Trouble Code (DTC) with scan tool.

Do you see that a transmission DTC is being shown?



Look up  Step 3

Look up  Step 4


  1. Correct the malfunction.
  2. Consult the applicable DTC table in the transmission repair section.
  3. Unset all DTCs using a scan tool.

Work done?



Look up  Step 4



  1. Unset all DTCs taking a Scan Tool.
  2. Start the engine and idle at normal operating temperature.
  3. Operate the vehicle within the specified conditions for setting this DTC.

Do you see the scan tool confirming that this diagnostic has been operated and the test passed?



Look up  Step 5

Look up  Step 2


Check if any additional DTCs are set.

Are any DTCs displayed that have not been diagnosed?


Go to

Applicable DTC Table

The system of your car is good.