ZF 4HP 16 - Automatic Transmission (Non-Europe or N. American Emissions)

DTC P0606 (Non-Europe or N. American Emissions)

Circuit Description

The external watchdog will be triggered. If the external watchdog does not run out after 30ms then the fault will be detected.

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 hold lamp will blink.

* The transmission control module (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 by hydraulic control.

* After ignition OFF/ON : 3rd gear by hydraulic control. Possible P, R and N also possible.

* Power supply cut off to the pressure control solenoid (PCS) valve.

Conditions for Clearing the Hold Lamp/DTC

* The hold lamp will turn OFF when the malfunction has not occurred after 3-ignition cycle.

* A history DTC will clear after 40 consecutive warm-up cycles without a fault.

* History DTCs can be cleared by using a scan tool.

Diagnostic Aids

When DTC P0606 sets, the possible cause of fault could be TCM.