Automatic Transmission Wiring Harness Check. Buick Century 1997

For 1990-2009 cars only

Makes 🢒 Buick 🢒 1997 🢒 Century 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T60-E 🢒 Automatic Transmission Wiring Harness Check

4T60-E Transmission Internal Wiring Harness Check

Step

Action

Value(s)

Yes

DEFINITION: This procedure provides a static check of all electrical wires and components in the transmission.

Install a J 39775 Jumper Harness on the transmission 7-way connector.
Using J 39200 DVOM and a J 35616-A Connector Test Adapter Kit, measure the resistance between terminals A and E (1-2 Shift Solenoid valve).

Is the resistance within the values indicated?

19-24ohms

Go to Step 3

Go to Step 2

Disconnect the internal transmission harness from the 1-2 Shift Solenoid valve.
Using J 39200 DVOM, measure the resistance of the 1-2 Shift Solenoid valve.

Is the resistance within the values shown?

19-24ohms

Go to Step 13

Go to Step 15

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

Is the resistance within the values indicated?

19-24ohms

Go to Step 5

Go to Step 4

Disconnect the internal transmission harness from the 2-3 Shift Solenoid valve.
Measure the resistance of the 2-3 Shift Solenoid valve.

Is the resistance within the values shown?

19-24ohms

Go to Step 13

Go to Step 15

Measure the resistance between terminals D and E (TCC Solenoid valve).

Is the resistance within the values indicated?

19-24ohms

Go to Step 7

Go to Step 6

Disconnect the internal transmission harness from the TCC Solenoid valve.
Measure the resistance of the TCC Solenoid valve.

Is the resistance within the values shown?

19-24ohms

Go to Step 13

Go to Step 15

Measure the resistance between terminals C and E (TCC PWM Solenoid valve).

Is the resistance within the values indicated?

10-12ohms

Go to Step 9

Go to Step 8

Disconnect the internal transmission harness from the TCC PWM Solenoid valve.
Measure the resistance of the TCC PWM Solenoid valve.

Is the resistance within the values shown?

10-12ohms

Go to Step 13

Go to Step 15

Measure the resistance between terminals F and G (TFT Sensor).

Is the resistance within the values indicated?

3.1-3.9Kohms

Go to Step 11

Go to Step 10

Disconnect the internal transmission harness from the TFT Sensor.
Measure the resistance of the TFT Sensor.

Is the resistance within the values shown?

3.1-3.9Kohms

Go to Step 13

Go to Step 15

Measure the resistance of the internal wiring harness from pins F and G of the transmission 7-way connector to the transmission case.

Is the resistance more than the value indicated?

20Mohms

Go to Step 12

Go to Step 13

Measure the resistance of the internal wiring harness from pins A, B, C, D, and E of the transmission 7-way connector to the transmission case.

Is the resistance more than the value indicated?

250Kohms

No problem found, exit the table

Go to Step 13

Inspect for high resistance:

•	Inspect the transmission wiring for poor connections at the 7-way connector and at the component connector.

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

•	Look for weak terminal tension.

Was the condition found?

Verify the repair and go to Step 1

Go to Step 14

Replace the internal wiring harness.

Is the replacement complete?

Verify the repair and go to Step 1

Replace the component.

Is the replacement complete?

Verify the repair and go to Step 1