Automatic Transmission Wiring Harness Check. Buick Century 1997

Measure the resistance between terminals B and E (2-3 Shift Solenoid Valve).

Is the resistance within the values indicated?

19-24ohms at 20°C (68°F)

24-31ohms at 88°C (190°F)

Go to Step 5

Go to Step 4

Disconnect the internal transmission harness from the 2-3 Shift Solenoid Valve.
Using J 39200 DVOM, measure the resistance of the 2-3 Shift Solenoid Valve.

Is the resistance within the values indicated?

19-24ohms at 20°C (68°F)

24-31ohms at 88°C (190°F)

Measure the resistance between terminals T and E (TCC PWM Sol. Valve).

Is the resistance within the values indicated?

10-12ohms at 20°C (68°F)

13-15ohms at 88°C (190°F)

Go to Step 7

Go to Step 6

Disconnect the internal transmission harness from the TCC PWM Sol. Valve.
Using J 39200 DVOM, measure the resistance of the TCC PWM Sol. Valve.

Is the resistance within the values indicated?

10-12ohms at 20°C (68°F)

13-15ohms at 88°C (190°F)

Measure the resistance between terminals C and D (PC Sol. Valve).

Is the resistance within the values indicated?

3-5ohms at 20°C (68°F)

5-6ohms at 88°C (190°F)

Go to Step 9

Go to Step 8

Disconnect the internal transmission harness from the PC Sol. Valve.
Using J 39200 DVOM, measure the resistance of the PC Sol. Valve.

Is the resistance within the values indicated?

3-5ohms at 20°C (68°F)

5-6ohms at 88°C (190°F)

Measure the resistance between terminals S and V (ISS).

Is the resistance within the values indicated?

893-1127ohms at 20°C (68°F)

1132-1428ohms at 88°C (190°F)

Go to Step 11

Go to Step 10

Disconnect the internal transmission harness from the ISS.
Using J 39200 DVOM, measure the resistance of the ISS.

Is the resistance within the values indicated?

893-1127ohms at 20°C (68°F)

1132-1428ohms at 88°C (190°F)

Measure the resistance between terminals M and L (TFT).

Is the resistance within the values indicated?

3164-3867ohms at 20°C (68°F)

225-285ohms at 88°C (190°F)

Go to Step 13

Go to Step 12

Disconnect the internal transmission harness from the TFT.
Using J 39200 DVOM, measure the resistance of the TFT.

Is the resistance within the values indicated?

3164-3867ohms at 20°C (68°F)

225-285ohms at 88°C (190°F)

Using J 39200 DVOM and J 35616-A Connector Test Adapter Kit, measure the resistance of the internal transmission harness from pins A, B, C, D, E, and T of the transmission 20-way connector to the transmission case.

Is the resistance more than shown?

250Kohms

Go to Step 14

Using J 39200 DVOM and J 35616-A Connector Test Adapter Kit, measure the resistance of the internal transmission harness from pins L and M of the transmission 20-way connector to the transmission case.

Is the resistance more than shown?

20Mohms

Go to Step 15

Using J 39200 DVOM and J 35616-A Connector Test Adapter Kit, measure the resistance of the internal transmission harness from pins S and V of the transmission 20-way connector to the transmission case.

Is the resistance more than shown?

10Mohms

No problem found, exit table

Verify repair and Go to Step 1

Inspect for high resistance:

•	Inspect the transmission wiring for poor electrical connections at the transmission 20-way connector and at the component connector.

•	Look for possible bent, backed out, deformed, or damaged terminals.

•	Check for weak terminal tension.

Was the condition found and corrected?