PCM Override Functions > OBD-I

[Krashed989]

I'm putting this in here because there are times when I have a hard time finding this info when needed. I'm assuming you already know how to enter diagnostics mode. If you don't know how, there is a sticky at the top of this forum with instructions on that.

First, you have to access the PCM OVERRIDE menu. Once you enter diagnostics mode it will show all the codes and end with "PCM?" ("ECM?"). Press the fan up button to enter that sub-menu and then the fan down button until you reach "PCM OVERRIDE?". Press the fan up button once more and you're in.

Well now that you're here, what can you do? What goodies does this have to offer?
Here's the list of overrides you can perform:

PS00 - No Override

PS01 - Torque Coverter Clutch Solenoid -- Cooler (blue) = off -- Warmer (red) = on

PS02 - EGR Solenoid -- Cooler (blue) = Decrease -- Warmer (red) = Increase

PS03 - ISC Motor -- Cooler (blue) = Retract -- Warmer (red) = Extend

PS04 - Injector Disable (Cylinders 1 through 8) -- Cooler (blue) = Disable -- Warmer (red) = Next

PS05 - Fuel Pump Relay -- Cooler (blue) = off -- Warmer (red) = on

PS06 - Air Pump (not used)

PS07 - Cruise Control Servo (run engine before performing test, cruise control switch must be in the on position) -- Cooler (blue) = Release -- Warmer (red) = Pull in

PS08 - Cooling Fan Relays -- Cooler (blue) = Low Speed Fan Relay -- Warmer (red) = High Speed Fan Relay

PS09 - Temporary Spark Advance -- Cooler (blue) = Retard -- Warmer (red) = Advance

PS10 - Injector Flow -- Cooler (blue) = Select -- Warmer (red) = Test

PS11 - Transaxle Override -- Cooler (blue) = Upshift -- Warmer (red) = Downshift

PS12 - Long Term Fuel Trim Reset -- Cooler (blue) = Reset -- Warmer (red) = No Action

PS13 - Throttle Position Sensor & Idle Learn/Garage Shift Adapt Reset -- Cooler (blue) = Reset Learn -- Warmer (red) = Reset Adapt

PS14 - Transaxle Shift/Steady State Adapt Reset -- Cooler (blue) = Reset Shift -- Warmer (red) = Reset Adapt

PS15 - Transaxle Oil Life -- Cooler (blue) = Decrease -- Warmer (red) = Increase

PS20 - Transaxle Pressure Control -- Cooler (blue) = Decrease -- Warmer (red) = Increase

PS21 - Knock Sensor Test -- Cooler (blue) = Advance -- Warmer (red) = No Action

PS22 - Permanent Spark Retard -- Cooler (blue) = Retard -- Warmer (red) = Advance

PS23 - Generator -- Cooler (blue) = off -- Warmer (red) = on

PS24 - Traction Control Disable (disables Traction Control for 11 ignition cycles) -- Cooler (blue) = Enable -- Warmer (red) = Disable