DTC P0850-23: Transmission Range Switch Circuit Malfunction [Start Stop Unit]: Notes

DTC P0850:23 (START STOP UNIT) DETECTION CONDITION AND POSSIBLE CAUSE

Description	Transmission range switch circuit malfunction
Detection condition	The start stop unit detected the following condition 5 times continuously with the ignition switched ON (engine off or on). Transmission range switch is stuck on for a continuous 1 s or more even though the TCM CAN signal is in a position other than the P and N position.
Fail-safe	Perform control of the internal signal for control of the transmission range switch as position other than P, N positions.
Possible cause	DTCs are stored in the TCM. Transmission range switch connector or terminal malfunction PCM connector or terminal malfunction Start stop unit connector or terminal malfunction Short to ground in wiring harness between the following terminals: PCM terminal 2BD-Transmission range switch terminal I Starter relay terminal 1F-Transmission range switch terminal I Transmission range switch malfunction PCM malfunction Start stop unit malfunction
Courtesy of MAZDA MOTORS CORP.