Power Relay Control Circuit High

P0686 ecm pcm power relay control circuit low p0687 ecm pcm power relay control circuit high.

Power relay control circuit high.

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. Codes related to p0685. It is referred to as the transmission control relay output circuit or switched battery. Tcm power relay control circuit high.

When the relay is off no power is supplied to the solenoid pack and the transmission is in limp in mode. 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. 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.

The relay output is fed back to the powertrain control module. 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. The powertrain relay is a normally open relay. It s a contact type relay activated with a signal wire from the ignition switch.

Although generic the engines differ between brands and may have slightly different causes for this code. What the p0687 code means. In most cases when the pcm stores a p0687 code it s because it has detected overly high voltage from its power supply. The relay armature is held in the open position by spring tension.

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. For this relay the coil requires just 12 vdc to operate and pulls just 75 ma well under. Learn what engine control module power relay control circuit high means location and how to repair. That may include but is not limited to vehicles from hyundai kia smart jeep dodge ford dodge chrysler etc.

What does that mean. What does p0887 mean. This diagnostic trouble code dtc is a generic powertrain code which means that it applies to all 1996 newer vehicles vw bmw chrysler acura audi isuzu jeep gm etc. Ecm pcm power relay control circuit high.

Battery positive voltage is supplied.