Chassis Information --- Section 10
Cayman 2005
361
Troubleshooting:
1. Turn ignition switch to ON. Do not start the engine. Ensure the display on the Shift Selector
illuminates. If it doesn't, go to Electrical Troubleshooting Section. If it does come on, does it
show N? The left character will be blank. If not, press N and see if it shifts. If it does, pro-
ceed to the next step. If it does not, go to the Electrical Troubleshooting Section.
2. Start the engine. If the engine starts, the transmission is in NEUTRAL. Ensure the display
indicates NN. If it does, proceed to the next step. If it doesn't, go to the Electrical
Troubleshooting Section.
3. Press the R button for REVERSE. See if RR is displayed. Listen for backup warning beeper.
If warning beeper sounds, the Shifter has shifted the transmission to Reverse. If it does, pro-
ceed to the next step. If it doesn't, go to the Electrical Troubleshooting Section.
4. Press the D button for DRIVE. See if D1 is displayed. If DD is displayed the J1939 is
not working or the connector is not making contact. If D3 is displayed, the Transmission
TCM is in the Limp Home Mode (3rd gear). Contact Allison at 800-524-2303 for further
instructions.
5. With the Transmission in DRIVE perform the following checks:
Press the D display in the window is D1.
Press the arrow down display in the window is 41.
Press the arrow down display in the window is 31.
Press the arrow down display in the window is 21.
Press the arrow down display in the window is 11
Press the arrow up display in the window is 21
Press the arrow up display in the window is 31
Press the arrow up display in the window is 41
Press the arrow up display in the window is D1
If all ranges show up correctly, the Shift-by-Wire System is functioning normally. Proceed with
Transmission Diagnosis per Allison Troubleshooting Procedures. If not, contact Arens Control at (847)
570-6411 for further instructions.
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