Test Point 7

TEST POINT 7
Pressure regulators 1, 2, 3, 4
Open circuit/short to ground, short to B+

DTC 80, 81, 82, 83

Fault Effect: Reduced driving program.

If there is a short to 8+ on pressure regulator 4, the torque converter clutch will always stay open.

Note:
The pressure regulators (DRs) are pressure-control solenoid valves. They convert an electrical current to 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:

DR1 = Pin 52 and pin 5

DR2 = Pin 52 and pin 1

DR3 = Pin 52 and pin 29

DR4 = 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 8+.

3. Check the pressure regulator. To do this, remove the ATF pan, pull off plug connection on the pressure regulator and measure the resistance.

Nominal value: 5 - 10 ohms

Note:
The hydraulic control unit must be removed before the DR4 (modulation pressure) can be tested.