Automatic Transmission Internal Wiring Harness Check

Automatic Transmission Wiring Harness Check

Step

Action

Value(s)

Yes

No

1
  1. Install the J 39775 Jumper Harness to the transmission side of the 20-way connector.
  2. Using the J 39200 Digital Multimeter (DMM) and the 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?

19-31 ohms

Go to Step 3

Go to Step 2

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

Is the resistance within the values indicated?

19-31 ohms

Go to Step 13

Go to Step 14

3

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

Is the resistance within the values indicated?

19-31 ohms

Go to Step 5

Go to Step 4

4
  1. Disconnect the internal transmission harness from the 2-3 shift solenoid valve.
  2. Measure the resistance of the 2-3 shift solenoid valve.

Is the resistance within the values indicated?

19-31 ohms

Go to Step 13

Go to Step 14

5

Measure the resistance between terminals T and U (TCC PWM solenoid valve).

Is the resistance within the values indicated?

10-15 ohms

Go to Step 7

Go to Step 6

6
  1. Disconnect the internal transmission harness from the TCC PWM solenoid valve.
  2. Measure the resistance of the TCC PWM solenoid valve.

Is the resistance within the values indicated?

10-15 ohms

Go to Step 13

Go to Step 14

7

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

Is the resistance within the values indicated?

1300-1950 ohms

Go to Step 9

Go to Step 8

8
  1. Disconnect the internal transmission harness from the Automatic Transmission Input Speed Sensor.
  2. Measure the resistance of the Automatic Transmission Input Speed Sensor.

Is the resistance within the values indicated?

1300-1950 ohms

Go to Step 13

Go to Step 14

9

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

Is the resistance within the values indicated?

158-4020 ohms

Go to Step 11

Go to Step 10

10
  1. Disconnect the internal transmission harness from the Automatic Transmission Fluid Temperature Sensor.
  2. Measure the resistance of the Automatic Transmission Fluid Temperature Sensor.

Is the resistance within the values indicated?

158-4020 ohms

Go to Step 13

Go to Step 14

11

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

Is the resistance within the values indicated?

3-8 ohms

Go to Step 13

Go to Step 12

12
  1. Disconnect the internal transmission harness from the Pressure Control solenoid valve.
  2. Measure the resistance of the Pressure Control solenoid valve.

Is the resistance within the values indicated?

3-8 ohms

Go to Step 13

Go to Step 14

13

Replace the Automatic Transmission Wiring Harness. Refer to Automatic Transmission Wiring Harness Replacement.

Is the replacement complete?

--

System OK

--

14

Replace the component.

Is the replacement complete?

--

System OK

--

Document ID# 23602
1996 Cadillac Seville