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AXL 966GII WHEEL LOADER Testing & Adjusting Media Number RENR4387-07 Publication Date 2003/10/01 Update Date 2003/10/07
Transmission Control (Shift Lever) - Test SMCS Code: 3065-038
Illustration 100
Problems with the transmission direction and speed control lever will cause the machine to respond incorrectly to the actions of the lever. Some problems with the transmission direction and speed control lever will cause the transmission to remain in the present speed and direction when a problem is detected. Other problems with the transmission direction and speed control lever will cause the transmission to shift to neutral. 1. View the status. a. Use the Caterpillar Electronic Technician (ET) to view the status "Group 1 Gear Lever Parameters". b. Actuate the transmission direction and speed control lever through all speeds in forward and reverse. Verify the positions on the display of the ET. c. Operate the machine in all speeds and all directions. All speeds and all directions may not be available. Expected Result: The fault is NOT present. Results:
· OK - The fault is NOT present. Suspect an intermittent fault. STOP. · NOT OK - The fault is still present. Document the positions which are not correct on the display of the ET. Proceed to Step 2.
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2. Check the harness. a. Check the harness connectors and the harness from the transmission direction and speed control lever to the power train electronic control module (ECM). b. Thoroughly inspect the connectors for the transmission direction and speed control lever and the connectors for the power train ECM. c. Visually inspect the harness wiring from the transmission direction and speed control lever to the power train ECM. d. Use the ET to view the status "Group 1 Gear Lever Parameters". e. Actuate the transmission direction and speed control lever through all speeds in forward and reverse. Verify the positions on the display for the ET. f. Operate the machine in all speeds and all directions. All speeds and all directions may not be available. Expected Result: The harness and harness connectors are correct. The fault is NOT present. Results:
· OK - The harness and the harness connectors are correct. The fault is NOT present. Proceed to Step 3. · NOT OK - The harness and/or the harness connectors are NOT correct and the fault is still present. Repair the machine harness and/or the harness connectors. If necessary, replace the machine harness and/or the harness connectors. Ensure that all the seals are properly in place. Also, check that the connectors mate completely. Verify that the repair eliminates the problem. Clear all diagnostic codes. STOP. 3. Check the voltage. a. Disconnect the transmission direction and speed control lever from the machine harness. b. With the key start switch in the ON position, measure the voltage between pin 1 and pin 3 of the 12-pin connector for the transmission direction and speed control lever. Expected Result: System voltage is present. Results:
· OK - System voltage is present. Proceed to Step 4. ·
NOT OK - System voltage is NOT present. There is a problem with the power supply to the transmission direction and speed control lever. Check the fuse for the transmission direction and speed control lever and the associated harness. STOP. 4. Check the continuity.
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a. Ensure that the key start switch is in the OFF position. b. The transmission direction and speed control lever and the power train ECM are disconnected from the machine harness. c. Check for continuity from pin 1 on the 12-pin connector of the transmission direction and speed control lever to all active pins on the 12-pin connector, except pin 3. Expected Result: Continuity is NOT present. Results:
· OK - Continuity is NOT present. Proceed to Step 5. · NOT OK - Continuity is present. The problem is in the harness. Repair the harness or replace the harness. 5. Check the continuity. a. Check for continuity from pin 3 on the 12-pin connector of the transmission direction and speed control lever to all active pins of the 12-pin connector, except pin 1. Expected Result: Continuity is NOT present. Results:
· OK - Continuity is NOT present. Proceed to Step 6. · NOT OK - Continuity is present. The problem is in the harness. Repair the harness or replace the harness. STOP. 6. Check the transmission direction and speed control lever. a. Reconnect the connectors for the power train ECM. b. Create a jumper wire that can short from pin 1 to two of the other pins on the connector for the transmission direction and speed control lever. c. The key start switch should be in the ON position. d. Use the ET to display "Group 1 Gear Lever Parameters". Conduct the following items and view the parameters on the ET.
· Connect the jumper from pin 1 to pins 5 and 7. The gear lever should read "1". · Connect the jumper from pin 1 to pins 5 and 8. The gear lever should read "2".
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· Connect the jumper from pin 1 to pins 5 and 9. The gear lever should read "3". · Connect the jumper from pin 1 to pins 5 and 11. The gear lever should read "4". · Connect the jumper from pin 1 to pins 6 and 7. The gear lever should read "1R". · Connect the jumper from pin 1 to pins 6 and 8. The gear lever should read "2R". · Connect the jumper from pin 1 to pins 6 and 9. The gear lever should read "3R". · Connect the jumper from pin 1 to pins 6 and 11. The gear lever should read "4R". · Connect the jumper from pin 1 to pins 11 and 12. The gear lever should read "N". Expected Result: All the gear parameters read correct. Results:
· OK - All gear parameters read correct. Replace the transmission direction and speed control lever and verify correct operation. STOP.
· NOT OK - All gear parameters DO NOT read correct. It is unlikely that the power train ECM is faulty. Exit this procedure and perform this CID FMI again. If the cause of the fault is not found, replace the power train ECM. Refer to Testing and Adjusting, "Electronic Control Module (Power Train) - Replace" for more information on replacing the power train ECM. STOP. Copyright 1991, 2013 Caterpillar Inc. All Rights Reserved.
