GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Holden 🢒 2005 🢒 Commodore Acclaim 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L60-E/4L65-E 🢒 Functional Test

Functional Test 7D3

The function test procedure is designed to verify the correct operation of components in the transmission and to identify whether a condition is electrical in nature, or not. This will eliminate the unnecessary removal of transmission components and time loss in rectification. The test is the first step in diagnosing mechanical or hydraulic transmission conditions and provides procedures and references to the Symptom Diagnostic table for specific diagnostic information.

Step

Action

Yes

No

1

Verify the customer complaint.

Has the customer complaint been verified?

Go to Step 2

--

2

Has the Powertrain On Board Diagnostic (OBD) System Check been performed?

Go to Step 3

Refer to Diagnostic System Check - Automatic Transmission

3
  1. Perform a visual inspection. Look for the following conditions:
    2. • Vehicle damage.
    • Transmission oil pan damage.
    • Loose, worn, damaged or missing components, brackets, mounts, etc.
    • Oil leaks.
  2. Worn or damaged suspension parts.
  3. Worn or damaged steering parts.
  4. Transmission range selector linkage damaged or out of adjustment.

Was an item identified that needs service?

Go to the Appropriate Repair or Diagnosis Section

Go to Step 4

4

Perform the Transmission Fluid Checking Procedure in 7D4 Automatic Transmission - 4L65E - On-vehicle Service.

Is procedure complete?

Go to Step 5

Refer to Transmission Fluid Check

5

Perform the road test procedure, refer to Road Test

Is the procedure complete?

Go to Step 6

System OK

6

Did the vehicle exhibit objectionable torque converter operation?

Go to Step 15

Go to Step 7

7

Did the vehicle exhibit a noise condition?

Refer to Noise and Vibration Analysis

Go to Step 8

8

Did the vehicle exhibit vibration condition?

Go to Step 9

Go to Step 10

9

Did the vibration occur only during TCC apply or release?

Go to Step 15

Refer to Noise and Vibration Analysis

10

Did the vehicle exhibit a shift speed condition such as low or high shift speeds?

Go to Inaccurate Shift Points

Go to Step 11

11

Check for any if the following shift quality (feel) conditions:

    • Harsh, soft delayed or no engagement.
    • Harsh, soft delayed shifts.
    • Shift shudder, flare or tie-up.

Were any of these conditions evident?

Go to Step 12

Go to Step 13

12

Perform the line pressure check procedure, refer to Line Pressure Check

Is the line pressure within specification?

Refer to Line Pressure

Refer to Functional Test

13

Road test to check for any of the following shift pattern conditions:

    • No upshift or downshift
    • Only one or two forward gears
    • No First gear, no Second gear, no Third gear or no Fourth gear
    • Slipping
    • No first gear start

Were any of these conditions evident?

Refer to Shift Speed

Go to Step 14

14

Check for any of the following range performance conditions:

    • No Park, Reverse or Drive
    • No engine braking
    • No gear selection
    • Incorrect gear selection

Were any of these conditions evident?

Go to Symptoms - Automatic Transmission

System Serviceable

15

Refer to Torque Converter Diagnosis to check whether the vehicle exhibits any of the following TCC conditions:

    • Stuck On or Off
    • Early or late engagement
    • Incorrect apply or release
    • Soft or harsh apply
    • Clunk or shudder
    • No torque multiplication
    • Excessive slip
    • Poor acceleration
    • Engine stalls

Were any of the above TCC conditions evident?

Go to Torque Converter Diagnosis

System Serviceable