Linkage Adjustment Using Throttle Valve TV Control Pressure

Tools Required:

• TV Pressure Gauge Set (0-60 psi) T86L-70002-A
• Cable TV Control Pressure Gauge T86L-70332-A

Core Wire Adjustment

NOTE: This procedure requires the use of TV Pressure Gauge Set (0-60 psi) T86L-70002-A. The results of the adjustment procedure depends on the accuracy of the pressure gauge.

A pressure gauge should be checked periodically (approximately every six months) or when the following occurs:

1. The needle will not return to 0 kPa (0 psi) under no pressure.

2. The needle goes past 0 kPa (0 psi) (negative side) under no pressure.

3. Bumping or dropping a pressure gauge.

Adjustment and/or Check

1. Attach TV Pressure Gauge Set (0-60 psi) T86L-70002-A to the TV port on the transmission.

   NOTE: If service tool is not available, in order to avoid the exhaust system, obtain the following material and assemble as shown:

   • One 1/8-inch NPT female Hansen fitting
   • One 1/8-inch NPT male Hansen fitting
   • One 1/4-inch NPT 90 degree elbow connector
   • One high-pressure hose fitting

   The pressure gauge should have 2.4m (8 feet) of flexible hose to make the gauge accessible while operating the engine.

2. Remove the air cleaner cover and inlet tube from the throttle body inlet for easier access to throttle lever.

    WARNING: THIS PROCEDURE REQUIRES WORKING IN CLOSE PROXIMITY TO THE EGR SPACER ASSEMBLY WHICH MAY BE HOT.

3. Insert tapered end of the tool between the crimped slug on the end of cable and plastic notched rod, also on end of cable assembly. Push in Cable TV Control Pressure Gauge Tool T86L-70332-A, forcing the crimped slug away from the plastic rod. Ensure gauge block is pushed in as far as it will go.
   
   
   
   

4. Operate engine until normal operating temperature is reached. The transmission fluid temperature should be approximately 38-72°C (100-150°F). Do not make pressure check if transmission fluid is cold or too hot to touch.

   NOTE: Do not check or set TV pressure in PARK.

5. Set parking brake and place shift selector in NEUTRAL. With gauge tool in place and engine idling in NEUTRAL, the TV pressure should be between 207 and 276 kPa (30 and 40 psi).

6. If TV pressure meets specification in Step 5, remove gauge tool allowing cable to return to its normal idle position. With engine still idling in NEUTRAL, TV pressure must be at or near zero (less than 34 kPa (5 psi)).

7. If TV pressure does not meet specification in either or both Steps 5 and 6, remove gauge tool. Check for and replace damaged components. Adjust cable as outlined under TV Cable Adjustment—Self-Locking System.

8. Check TV pressure again. Refer to Steps 3 through 6.

9. If TV pressure still does not meet specification, it will be necessary to modify adjustment as follows.

10. Remove gauge tool and pry grooved pin out of grommet on throttle lever.
    
    
    
    

11. Mark or measure location of plastic block on notched rod.
    
    
    
    

12. Push out locking tab.
    
    
    
    

13. Using mark or measurement on plastic block as a reference, move plastic block toward throttle body mounting bracket to raise TV pressure, or move it away from bracket to lower TV pressure. Push in white locking tab to lock block in position.
    
    
    
    

    NOTE: 1mm movement equals 17 kPa (2.5 psi). 1 notch movement equals 14 kPa (2 psi).

14. Insert grooved pin into grommet.
    
    
    
    

15. Check TV pressure. Refer to Steps 3 through 6.

    NOTE: For best transmission function, the TV pressure should be set as close as possible to 227 kPa (33 psi) in NEUTRAL with gauge tool installed. Since the TV pressure goes up approximately 14 kPa (2 psi) when the shift lever is moved from NEUTRAL to a forward gear ((D) or D), this will result in a TV pressure setting near the desirable 241 kPa (35 psi) in forward gear. Do not attempt to check TV pressure with the transmission in gear. When the gauge tool is removed, the TV pressure should drop to less than 34 kPa (5 psi). If the TV pressure does not drop to less than 34 kPa (5 psi), reset the TV pressure to a value less than 227 kPa (33 psi) with gauge tool installed but no less than 207 kPa (30 psi). Verify that the TV pressure is less than 34 kPa (5 psi) with gauge tool removed.

16. Repeat Steps 10 through 14, if necessary.