ZF 4HP 16 - Automatic Transmission (European and N. American Emissions)

DTC P0606 (European and N. American Emissions)

Circuit Description

In case that transmission control module (TCM) reset has occurred by software (warm reset), not by ignition key ON, TCM increments software reset counter. If the counter exceeds the permissible maximum value for the software count then the fault will be detected.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC P0606 Transmission Control Module (TCM) Internal Performance

Conditions for Setting the DTC

* System voltage is too high or too low.
* Transaxle input voltage is too high or too low.
* Immediately after the above condition occurs

Action Taken When the DTC Sets

* The malfunction indicator lamp (MIL) will illuminate.
* The TCM will record operating conditions at the time the diagnostic fails. This information will be stored in the Failure Records buffer.
* Adopt Emergency/Substitute mode and constant 4th gear.
* Power supply cut off to the pressure control solenoid (PCS) valve.

Conditions for Clearing the MIL/DTC

* The MIL will turn OFF when the malfunction has not occurred after 3 ignition cycles.
* A history DTC will clear after 40 consecutive warm-up cycles without a fault.
* History DTCs can be cleared by using a scan tool.