Power Relay Control Circuit High

Although generic the engines differ between brands and may have slightly different causes for this code.

Power relay control circuit high.

This diagnostic trouble code dtc is a generic powertrain code and applies to many obd ii vehicles 1996 newer. Obd ii fault code p0887 is a generic code that is defined as transmission control module tcm power relay control circuit high and is set when the pcm powertrain control module detects an abnormally high voltage or any voltage at all from the relay that supplies the shift solenoids with power when the transmission is operating normally. For this relay the coil requires just 12 vdc to operate and pulls just 75 ma well under. When the relay is off no power is supplied to the solenoid pack and the transmission is in limp in mode.

The powertrain relay is a normally open relay. The relay output is fed back to the powertrain control module. When the relay is off no power is supplied to the solenoid pack and the transmission is in limp in mode. It is referred to as the transmission control relay output circuit or switched battery.

Tcm power relay control circuit high. A p0687 code is stored when the pcm powertrain control module detects an incorrect abnormal or erratic voltage reading from the relay control circuit that supplies it with its power. Battery positive voltage is supplied. Learn what engine control module power relay control circuit high means location and how to repair.

Ecm pcm power relay control circuit high. What does that mean. It s a contact type relay activated with a signal wire from the ignition switch. If a defective control module is suspected the better option would be to refer the application to the dealer or other competent repair facility for professional diagnosis and repair.

What the p0687 code means. The relay output is fed back to the powertrain control module. The circuit that powers the electromagnet s coil is completely separate from the circuit that is switched on or off by the relay s switch so it s possible to use a relay whose coil requires just a few volts to turn a line voltage circuit on or off. What does p0887 mean.

In most cases when the pcm stores a p0687 code it s because it has detected overly high voltage from its power supply. The pcm powertrain control module also known as ecm or engine control module in other vehicle makes comes with a power relay that provides battery voltage safely to the right pcm circuits. It is referred to as the transmission control relay output circuit or switched battery. That may include but is not limited to vehicles from hyundai kia smart jeep dodge ford dodge chrysler etc.

Codes related to p0685.