A 1996 or later on Dodge or Jeep truck making use of an RE-series RWD transmission behind a petrol engine can exhibit a chronic code P1763 – “governor pressure sensor volts as well high” – causing the PCM to location the transmission right into third-gear failsafe.
Shift-solenoid, band-apply and ground-circuit-relay codes are stored in 1990-93 Isuzu Trooper and Rodeo. Shift-solenoid, band-apply and shorted-to-ground or shorted-to-power codes are stored in 1994-95 Isuzu Trooper, Rodeo and Honda Passport, leading to limp mode.
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Any 1996 or later on Dodge or Jeep truck utilizing an RE-series RWD transmission behind a gasoline engine have the right to exhibit a chronic code P1763 – “governor pressure sensor volts too high” – leading to the PCM to ar the transmission right into third-gear failsafe. The customer additionally may complain of a lose of engine power. The internal wiring harness, solenoids and also sensor may have actually been replaced already in an effort to settle the code.
Cause 2: one more cause can be the line press is running over factory specification. This can be the an outcome of a valve-body modification or a valve-body malfunction.
Cause 3: A malfunctioning alternator producing voltage spikes or high charging voltage would certainly be one more consideration.
Correction 1: due to the fact that the governor-pressure sensor shares a soil circuit with assorted other sensors including the battery-temperature sensor and also the heated oxygen sensor, other codes may be existing with P1763, such together P1492 “Battery Temperature Sensor Volts also High.” A P1762 “Governor Sensor offset volts or drift also low or also high” or a P1757 “Governor pressure above 3 psi at 0 mph” also may be present. However of all the possibilities detailed in cause No. 1, malfunctioning boil oxygen sensors are the most-common cause of a jeopardized shared ground course for the governor-pressure sensor.
You deserve to make a quick inspect by just clearing the code, unplugging both the upstream and downstream oxygen sensors and also taking the truck for a road test. If the password does not return, operation the vehicle with the sensors plugged in one at a time to identify which oxygen sensor is causing the code, and replace the faulty sensor. If this rapid test proves that the boil oxygen sensors room not the cause of any governor-pressure-sensor codes, girlfriend will need to get a wiring schematic details to the auto you’re functioning on and also inspect every sensor share the branch sensor’s floor path.
As a corrective modification you may find that a 150-ohm 1/4-watt resistor (Radio Shack part# 271-1312) has actually been installed into the wiring harness near PCM “B-C2” white connector terminal 29 (see Figure 3). This resistor acts as a voltage divider and has confirmed to work-related well.
NOTE: code P1763 sets when the PCM watch 4.89 volts or greater on the governor-pressure-sensor circuit because that eight secs or more. If this was led to by high line pressure, it suggests that governor push was 90-96 psi or greater with the transmission in drive.
The computer controls the governor-pressure solenoid to provide governor pressure relative to road speed (except in diesel applications). Once this solenoid is off it permits full pressure right into the branch circuit. To administer 0 psi at 0 mph it requirements to be totally energized. As car speed increases the computer system slowly transforms the solenoid off in station proportion to road speed. When the auto is in 4th gear and the converter clutch is commanded on, the solenoid is turned totally off. Because line push is being provided to the branch solenoid, when the computer turns that off, practically all push feeding the solenoid currently enters the branch circuit. Need to line press be above 90 psi, for this reason will pressure in the governor circuit, and also after eight secs code P1763 sets.
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Correction 3: If the alternator is suspect, clear the codes and road-test the auto with the alternator disconnected from the circuit. If the code does no return, the alternator need to be replaced. Yet if the code does return, friend will must review cause and also correction No. 1 prior to considering the PCM defective.