The BCM either compares the key ID against what is already programmed (backup starting) or programs that key ID into memory (key programming). A maximum of 4 passive keys can be programmed into the BCM memory.
Possible Causes
Wiring, terminals or connectors Passive key PATS front antenna BCM
PINPOINT TEST D : UNABLE TO PROGRAM KEYS
D1 CHECK FOR THE CORRECT KEYS
Verify the keys present are the correct type for the vehicle. Refer to the PATS Job Aid in the Service Tips tab on the Professional Technician Society (PTS) web page.
Are the correct keys present?
Yes | GO to D2 |
|---|---|
No | The system cannot be tested without the correct keys. INFORM the customer the correct keys must be present to proceed with diagnosis of the system. |
D2 CHECK FOR OTHER VALID PROGRAMMED KEYS
Check for other valid programmed keys.
Is a valid programmed key present?
Yes | GO to D4 |
|---|---|
No | GO to D3 |
D3 VERIFY THE KEY PLACEMENT FOR KEY PROGRAMMING
NOTE: This step requires 2 passive keys to be programmed into the BCM. Any previous programmed passive keys are erased from memory.
Verify the key is correctly placed in the backup starting location. REFER to: Passive Anti-Theft System (PATS) - System Operation and Component Description (419-01B Passive Anti-Theft System (PATS), Description and Operation). Using a diagnostic scan tool, erase and program the new passive keys. REFER to: Anti-Theft Security Access (419-01B Passive Anti-Theft System (PATS), General Procedures).
Do the keys program to the vehicle?
Yes | The vehicle is operating correctly. The concern was caused by an improperly placed passive key. |
|---|---|
No | GO to D6 |
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.