Test D: DTC B1602 - PATS Received Invalid Format of Key-Code From Ignition Key Transponder

PINPOINT TEST D: DTC B1602 - PATS RECEIVED INVALID FORMAT OF KEY-CODE FROM IGNITION KEY TRANSPONDER

Normal Operation
The PATS transceiver communicates with the PATS key. During each vehicle start sequence, the PATS transceiver reads the PATS key identification code and sends the data to the instrument cluster (IC). The IC will then send a message to the PCM to control the engine enable. The IC initiates the key interrogation sequence when the key is turned to the ON or START position.

- 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

D1-D2:

D2-D3: