Pinpoint Test D: DTC B1602
Anti-Theft
Pinpoint Test D: DTC B1602
Normal Operation
- DTC B1602 (PATS Received Invalid Format of Key-Code From Ignition Key Transponder) - sets when only a partial PATS key was read. Remote starter equipment can also cause this DTC.
This pinpoint test is intended to diagnose the following:
- PATS key
- PATS transceiver
- IC
PINPOINT TEST D: DTC B1602
NOTE: Large metallic objects, electronic devices on the key ring that can be used to purchase gasoline or similar items, or a second key on the same key ring as the PATS key may cause a vehicle starting concern and record DTCs under certain conditions. If a fault cannot be identified, examine the customer key ring for such objects or devices. If present, inform the customer that they need to keep these objects from touching the PATS key while starting the engine. These objects and devices cannot damage the PATS key, but can cause a momentary concern if they are too close to the key during engine start. If a concern occurs, turn the ignition off and restart the engine with all other objects on the key ring held away from the ignition key. Check to make sure the PATS key used by the customer is an approved Ford PATS key. (PATS keys from Ford, Rotunda, Strattec, or Huf are approved Ford PATS keys.)
NOTE: Only 8 PATS keys can be programmed into the IC using the Key Programming Using Diagnostic Equipment procedure unless the unlimited key mode is active. If the N_KEYCODE (number of keys programmed) PID reads more than 2, the concern may be the PATS key being used is an unprogrammed key. Verify this by also viewing the MASTERKEY (master key) PID. It must read PRESNT for the key to be valid.
