Manufacturer Codes: 82

Fault, DTC's 80, 81, 82, 83 Test Point 7

Pressure regulators 1, 2, 3, 4 Open circuit/short to ground, short to B+

Possible causes, elimination, notes

Fault effect:
Reduced driving program.

When there is a short to B+ at pressure regulator 4, the torque converter clutch is always open.

NOTE: The pressure regulators (PR) are pressure-control solenoid valves. They convert an electric current into a proportional, hydraulic pressure.

1. Check pressure regulator with wiring. To do this, connect an ohmmeter to the control module connector and measure the resistance.

PR1 = Pin 52 and pin 5
PR2 = Pin 52 and pin 1
PR3 = Pin 52 and pin 29
PR4 = Pin 52 and pin 4

Nominal value: 5... 10 Ohms.

2. Check wiring from the control module connector pins 1, 4, 5 and 29 to the 16-pole transmission connector pins 3, 11, 2 and 7 for continuity, short to ground and short to B+.
3. Check the pressure regulator. To do this, remove the ATF pan, remove plug connection from the pressure regulator and measure the resistance.

Nominal value: 5... 10 Ohms.

NOTE: The hydraulic control unit must be removed before the PR1 (modulation pressure) can be tested.