Test Procedure

WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

TZ1 KEY ON ENGINE OFF (KOEO) AND CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODE (DTC) P1A06: VERIFY THAT THE CONCERN IS PRESENT

NOTE: Clearing the transaxle control module (TCM) DTCs erases any TCM recorded freeze frame data. Make sure to record any TCM freeze frame information before proceeding any further. Refer to the scan tool instruction manual for freeze frame PID menu.

Clear and retrieve TCM continuous DTCs.
Is DTC P1A06 present?

Yes	No
GO to TZ2.	Unable to duplicate or identify the concern at this time. RETURN to the SYMPTOM CHARTS article, Symptom Charts for further direction.

TZ2 CHECK THE TCM VEHICLE MODE PID

Key ON, engine OFF.
Access the TCM and monitor the VEHMODE PID.
Key ON, engine running.
Does the PID indicate that the VEHMODE changed when the key is cycled from ON to START?

Yes	No
INSTALL a new transaxle assembly. REFER to AUTOMATIC TRANSAXLE/TRANSMISSION - ELECTRONICALLY CONTROLLED CONTINUOUSLY VARIABLE TRANSMISSION (ECVT) .	GO to TZ3.

TZ3 CHECK FOR CORRECT PCM OPERATION

Disconnect all the PCM connectors.
Visually inspect for:
- pushed out pins
- corrosion
Connect all the PCM connectors and make sure they seat correctly.
Carry out the PCM self-test and verify the concern is still present.
Is the concern still present?

Yes	No
INSTALL a new PCM. REFER toFLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) .	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.