DTC B2735: Pass-Key(R) Programming Mode Active: Notes

Insertion of PASS-Key(R) into ignition lock cylinder completes PASS-Key(R) circuit. Contacts in ignition lock cylinder mate with resistor pellet contacts in PASS-Key(R). BCM compares resistance value of key pellet to valid resistance programmed into BCM. When proper resistance value is read, BCM will allow theft deterrent relay to energize, steering column to unlock, and will send a message through serial data line to PCM to allow fuel enable processing to occur.

When BCM is replaced, new BCM must be programmed to accept resistance value of existing vehicle keys so that it will allow PASS-Key(R) operation. The new BCM is programmed to accept the first PASS-Key(R) resistance value detected.

If BCM is unable to detect a valid PASS-Key(R) resistance value, BCM will not end programming sequence and DTC 2735 will set. DTC B2735 will set when BCM is unable to detect a valid PASS-Key(R) code during BCM programming due to an open or short in PASS-Key(R) circuit. When DTC B2735 is set, the following will occur:

• BCM will send signal to IPC to turn on SECURITY warning indicator.
• BCM will disable theft deterrent relay.
• PCM will not allow fuel enable processing to occur.
• Sampling of PASS-Key(R) resistance will be disabled for a 3-minute timeout period.
• An armed Universal Theft Deterrent (UTD) system will not disarm.
• Steering column will remain in locked position.

If conditions for malfunction no longer exist, history DTC will clear after 50 consecutive ignition cycles. DTC B2735 will also clear when conditions no longer exist, or when IPC or scan tool is used to clear codes.