When the relay is off no power is supplied to the solenoid pack and the transmission is in limp in mode.
Power relay control circuit high.
It is referred to as the transmission control relay output circuit or switched battery.
Battery positive voltage is supplied.
Ecm pcm power relay control circuit high.
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.
What does that mean.
Although generic the engines differ between brands and may have slightly different causes for this code.
What the p0687 code means.
The powertrain relay is a normally open relay.
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.
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.
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.
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.
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.
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.
Codes related to p0685.
What does p0887 mean.
It s a contact type relay activated with a signal wire from the ignition switch.
P0686 ecm pcm power relay control circuit low p0687 ecm pcm power relay control circuit high.
In most cases when the pcm stores a p0687 code it s because it has detected overly high voltage from its power supply.
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.
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.
