Detection Condition

If PCM terminal "1Q" does not receive pulse signal from ABS/TCS control module when vehicle is driven greater than 3.3 MPH, PCM determines that communication circuit has a malfunction. See Fig 1.

Fig 1: Identifying DTC P1627: Powertrain Control Module (PCM) - Anti-Lock Brake System (ABS)/Traction Control System (TCS)/Line Communication Error, Circuit & Connector Terminals

Courtesy of MAZDA MOTORS CORP.