Password Learn Procedure For Anti-Theft System (6.5L Diesel)

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Password learn procedure must be performed if PCM, Passlock® module or sensor is replaced. A password is communicated between PCM and Passlock® module to provide engine operation. If PCM is replaced, PCM must learn password from Passlock® module.
Start engine. After engine stalls, leave ignition switch turned to ON position for 10 minutes, the SECURITY indicator light will stay on for 10 minutes and then turn off. SECURITY indicator light is located on upper right corner of instrument panel. After SECURITY indicator light turns off, turn ignition off for 30 seconds.
NOTE: Ensure battery is fully charged before proceeding. Performing this procedure will cause DTC P1630 to set. Use scan tool to check for DTC P1630 when performing this procedure. Ensure steps are followed in correct order or procedure may need to be repeated.
Start engine. After engine stalls, leave ignition switch turned to ON position for 10 minutes. SECURITY indicator light will stay on for 10 minutes and then turn off. After SECURITY indicator light turns off, turn ignition off for 30 seconds.
Attempt to start engine. After engine stalls, leave ignition switch turned to ON position for 10 minutes. SECURITY indicator light will stay on for 10 minutes and then turn off or until DTC P1630 is set.
Turn ignition switch to OFF position for 30 seconds. Turn ignition switch to ON position and wait 30 seconds. Attempt to start engine. If engine starts, password learn procedure is complete. Ensure DTC P1630 is cleared by turning ignition off for 30 seconds and then turning ignition switch to ON position again. If DTC P1630 is not cleared, perform test procedures for DTC P1630 and repair as necessary. See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
NOTE: DTC P1630 will be set as a result of this procedure. DTC P1630 may be cleared from PCM by turning ignition off for 30 seconds and then turning ignition switch to ON position again.
If engine does not start, ensure procedure was properly followed. If procedure was properly followed, check for any DTCs. If any DTCs exist, perform test procedures for specified DTC and repair as necessary. See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.