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Diagnostic Trouble Code (DTC) P0700
Transaxle Control Module Malfunction
Circuit Description
The Transmission Control Module (TCM) and the Engine Control Module (ECM) are connected through the serial data link circuit. The TCM sends a Class-II P-code status message to the ECM every 100 milliseconds to confirm the transmission is functioning correctly.
If the TCM detects either an A- or B-type malfunction within the transmission, the TCM will send to the ECM a P-code status message to turn the Malfunction Indicator Lamp (MIL) ON and set DTC P0700.
Conditions for Setting the DTC
Received message from the TCM indicating malfunction is detected in TCM.
Action Taken When the DTC Sets
The Malfunction Indicator Lamp (MIL) will illuminate.
The ECM will record operating conditions at the time the diagnostic fails. This information will be stored in the Freeze Frame and/or Failure Records buffers.
A history DTC is stored.
Conditions for Clearing the MIL/DTC
A history DTC will clear after 40 consecutive warm-up cycles without a fault.
DTC(s) can be cleared by using the scan tool.
Disconnecting the ECM battery feed for more than 10 seconds.
Diagnostic Aids
An intermittent may be caused by a poor connection, rubbed-through wire insulation or a wire broken inside the insulation.
Check for a poor connection or damaged ECM/TCM harness. Inspect the serial data link circuit for the following conditions:
Improper mating
Broken locks
Improperly formed
Damaged terminals
Poor terminal-to-wiring connections
Damaged harness
DTC P0700 - Transaxle Control Module Malfunction
Step Action Value(s) Yes No
1 Perform an On-Board Diagnostic (EOBD) System Check.
Was the check performed? - Go to Step 2 Go to "On-Board Diagnostic System Check"
2 Install a scan tool to the Data Link Connector (DLC).
Turn the ignition ON.
Select Transmission Control Module (TCM) Diagnostic Trouble Code (DTC) with scan tool.
Is a transmission DTC displayed? - Go to Step 3 Go to Step 4
3 Repair transmission malfunction. Refer to the applicable DTC table in the transmission repair section.
Using a scan tool, clear the TCM DTC.
Is the repair complete? - Go to Step 4 -
4 Using the scan tool, clear the Diagnostic Trouble Codes (DTCs).
Start the engine and idle at normal operating temperature.
Operate the vehicle within the Conditions for setting this DTC as specified in the supporting text.
Does the scan tool indicate that this diagnostic has run and passed? - Go to Step 5 Go to Step 2
5 Check if any additional DTCs are set.
Are any DTCs displayed that have not been diagnosed? - Go to Applicable DTC Table System OK