Here is a description of the codes and the ATM test procedures that you should carry out.
Problem with battery feed to logic module. Occurs when feed has been disconnected within last 20-40 engine starts.
Code 26 (Non-Turbo Only)
Problem with fuel injector driver. Indicates peak injector current level has not been reached during cranking. ATM code 02.
This is the "end of diagnostic mode." This code will appear as the final code after all other trouble codes have been displayed.
Actuation Test Mode (ATM) test codes are 2-digit numbers, appearing on the diagnostic readout box, that identify various circuits that will be used during diagnostics. They are listed under applicable trouble codes.
Circuit Actuation Test Mode (ATM)
1. Put system into Diagnostic Mode. Wait for code 55 to appear on readout box display and Power Loss Light to stop blinking. Ensure read/hold switch is in "READ" position. Press and hold ATM button on readout box until the desired ATM test code is displayed. Release ATM button.
2. The logic module will turn the selected circuit on and off at 2 second intervals for 5 minutes and then turn the test off. To stop the test before the 5 minute period is complete, turn the ignition off.
Tuesday, January 13th, 2009 AT 11:44 AM