P061E Internal Control Module Brake Signal Performance
OBD-II Trouble Code Technical Description
Internal Control Module Brake Signal Performance
What does that mean?
This generic powertrain diagnostic trouble code (DTC) typically applies to many OBD-II vehicles. That may include but is not limited to vehicles from Dodge, Ram (Cummins), Ford, Chrysler, etc.
When a code P061E is stored, it means that the powertrain control module (PCM) has detected an internal performance error in the brake signal circuit. Other controllers may also detect an internal PCM performance error (with the engine RPM monitoring system) and contribute to a P061E being stored.
Internal control module monitoring processors are responsible for various controller self-test duties and overall internal control module accountability. Engine air mass calculation system input and output signals are subject to self-test and are monitored constantly by the PCM and other related controllers. The transmission control module (TCM), traction control module (TCSM), and other controllers are subject to interaction with the brake signal circuit.
The brake signal (also called the stop lamp) circuit is monitored (by the PCM and other controllers) using input signals from the brake pedal sensor. The brake signal circuit is integral to several control systems used in OBD-II vehicles. The cruise control system and the transmission torque converter lockup system are just a couple of the most common of these systems. The PCM and other controllers receives input signals from the stop lamp switch and uses these inputs to activate and deactivate various functions accordingly. Brake signal inputs are typically limited to distinctions of either ON or OFF.
Whenever the ignition is on and the PCM is energized, internal engine brake signal circuit self-tests are initiated. In addition to running internal controller self-tests, the controller area network (CAN) also compares signals from each individual module to ensure that all controllers are functioning properly. These tests are performed simultaneously.
If the PCM detects an internal error in brake signal circuit, a code P061E will be stored and a malfunction indicator lamp (MIL) may be illuminated. Multiple ignition cycles (with a failure) may be required for MIL illumination.
Photo of a PCM with the cover removed:
What is the severity of this DTC?
Internal control module processor codes should be categorized as severe. A stored code P061E could result in erratic transmission torque converter lockup operation or inoperative cruise control (speed control).
What are some of the symptoms of the code?
Symptoms of a P061E trouble code may include:
Harsh or delayed shifting (transmission) Engine shutdown when coming to a stop (in drive) Inoperative stop (brake) lamps Lack of torque converter lockup may result in transmission damageWhat are some of the common causes of the code?
Causes for this code may include:
Defective stop (brake) lamp switch Defective PCM or PCM programming error Open or shorted circuit or connectors in the CAN harness Insufficient control module ground Open or shorted circuits between the brake signal switch and the PCMWhat are some P061E troubleshooting steps?
Even to the most experienced and well-equipped professional technician, diagnosing a code P061E can prove to be quite a challenge. There is also the issue of reprogramming. Without the necessary reprogramming equipment, it will be impossible to replace a defective controller and complete a successful repair.
If there are ECM/PCM power supply codes present, they will obviously need to be rectified before attempting to diagnose a P061E. Also, if brake lamp switch/signal codes are present, these must be diagnosed and repaired first.
Follow manufacturer's recommendations for testin
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