Automatic Transmission Internal Wiring Harness Check. Chevrolet Cavalier 1996

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 1996 🢒 Cavalier 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T40-E 🢒 Automatic Transmission Internal Wiring Harness Check

Internal Wiring Harness Check (4T40-E)

Step

Action

Value(s)

Yes

Install the J 39775 Jumper Harness on the transmission side of the 20-way connector, if needed.
Using the J 39200 Digital Multimeter (DMM) and J 35616-A Connector Test Adapter Kit, measure the resistance between terminals A and E: the 1-2 shift solenoid valve.

Is the resistance within the values shown?

Refer to Component Resistance Check

Go to Step 3

Go to Step 2

Disconnect the internal transmission harness from the 1-2 shift solenoid valve.
Measure the resistance of the 1-2 shift solenoid valve.

Is the resistance within the values shown?

Refer to Component Resistance Check

Go to Step 14

Go to Step 16

Measure the resistance between terminals B and E: the 2-3 shift solenoid valve.

Is the resistance within the values shown?

Refer to Component Resistance Check

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?

Refer to Component Resistance Check

Go to Step 14

Go to Step 16

Measure the resistance between terminals T and E: the TCC solenoid valve.

Is the resistance within the values shown?

Refer to Component Resistance Check

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?

Refer to Component Resistance Check

Go to Step 14

Go to Step 16

Measure the resistance between terminals C and D: the pressure control solenoid valve.

Is the resistance within the values shown?

Refer to Component Resistance Check

Go to Step 9

Go to Step 8

Disconnect the internal transmission harness from the pressure control solenoid valve.
Measure the resistance of the pressure control solenoid valve.

Is the resistance within the values shown?

Refer to Component Resistance Check

Go to Step 14

Go to Step 16

Measure the resistance between terminals S and V: the A/T ISS.

Is the resistance within the values shown?

Refer to Component Resistance Check

Go to Step 11

Go to Step 10

Disconnect the internal transmission harness from the A/T ISS.
Measure the resistance of the A/T ISS.

Is the resistance within the values shown?

Refer to Component Resistance Check

Go to Step 14

Go to Step 16

Measure the resistance between terminals M and L of the TFT sensor.

Is the resistance within the values shown?

Refer to Component Resistance Check

Go to Step 13

Go to Step 12

Disconnect the internal transmission harness from the TFP Val. Position Sw.
Measure the resistance of the TFT sensor by placing the meter leads between terminals E and F of the TFP Val. Position Sw.

Is the resistance within the values shown?

Refer to Component Resistance Check

Go to Step 14

Go to Step 16

Using the J 39200 Digital Multimeter (DMM) and J 35616-A Connector Test Adapter Kit, measure the resistance of the internal transmission harness from pins A, B, C, D, E, L, M, S, T and V of the transmission 20-way connector to the transmission case.

Is the resistance within the values shown?

Refer to Component Resistance Check

No condition found, exit the table

Go to Step 15

Inspect for high resistance:

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

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

•	Check for weak terminal tension.

Was the condition found?

Verify the repair and Go to Step 1

Go to Step 15

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