Vauxhall Workshop Service and Repair Manuals

Replace electronic control unit (AF40)

Important:   If the automatic transmission or Transmission Control Module (TCM) is replaced, the Transmission Control Module (TCM) software is overwritten and the basic settings must be reset. This is done on a long test drive when the automatic transmission is warm by changing through all gears several times while "D" is engaged. After the long test drive, it may be possible that the Transmission Control Module (TCM) might not be completely finished with the running-in process. Thus, the customer must be informed that until the running-in process is complete, the transmission may not change gears or operate optimally. Until the running-in process is complete, there could be hard, jerky gearchanges, increased engine speed during gearchanges and delayed gearchanges.

  Remove

1.	When replacing the transmission control module, carry out "Reset" with TECH 2 before removal

3.   Detach wiring harness for preheating period control unit (1) from battery support •   Unclip wiring harness plug 4.   Disconnect wiring harness plug of Transmission Control Module (2) •   Release wiring harness plug (arrow) and disconnect

5.   Detach selector lever actuation cable (2) •   Unclip ball socket (3) from actuation lever (4) •   Unclip from counterhold Note:   Pull back sleeve (1) and pull cable from counterhold.

6.   Detach actuation lever (1) •   Unscrew nut (2)

7.   Detach control unit (1) •   Remove 3x bolts Important:   Do not damage plug pins. •   Carefully pull control unit upward

  Install

8.   Attach control unit (1) •   Set selector lever shaft and control unit in position "N" – Pivot selector lever shaft all the way forward with actuation lever and then move back two notches – Align marks on control unit Important:   do not damage plug pins. Check for correct seating of the control unit (arrow). •   Insert control unit •   Tighten 3x bolt 25 Nm

9.   Attach actuation lever (1) •   Tighten nut 15 Nm

10.   Attach selector actuation cable (2) •   Clip cable into counterhold Note:   Pull sleeve (1) back and clip in cable. •   Clip ball socket (3) to actuation cable (4)

11.   Connect wiring harness plug of Transmission Control Module (2) •   Connect and latch wiring harness plug (arrow) 12.   Connect wiring harness of preheating period control unit (1) to battery support •   Clip in wiring harness

14.	When replacing the transmission control module, carry out "Program" with TECH 2 after installation •   Save position "N" in control unit