B1681
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PINPOINT TEST 7: DTC B1681 - PATS TRANSCEIVER MODULE SIGNAL IS NOT RECEIVED - HYBRID
Normal Operation
The passive anti-theft system (PATS) transceiver receives voltage from the smart junction box (SJB) fuse 36 (5A) on circuit (L/BR) and is grounded on circuit (B/G). The PATS transceiver and the instrument cluster (IC) communicate on the TX and RX circuits (Y/O) and (V/GY). The IC compares the key code stored in memory and enables the engine to start if the key code is correct.
- DTC B1681 (PATS Transceiver Module Signal is Not Received) - sets when the PATS transceiver signal is not received by the IC. This DTC can be caused by circuits between the PATS transceiver and the IC, or circuits to the PATS transceiver. This can also be caused by using the incorrect PATS transceiver part number.
Possible Causes
- Fuse
- Wiring, terminals or connectors
- PATS key
- PATS transceiver
- IC
Diagnostic Procedure
CAUTION:Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE:Failure to disconnect the battery when instructed will result in false resistance readings. See Battery Disconnect.
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