DTC P0850-24: Transmission Range Switch Circuit Malfunction [Start Stop Unit]: Notes

DTC P0850:24 (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 off for a continuous 1 s or more even though the TCM CAN signal is in a position the P or 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 Open circuit in wiring harness between transmission range switch terminal A and body ground PCM connector or terminal malfunction Start stop unit connector or terminal malfunction Open circuit in wiring harness between the following terminals: PCM terminal 2BD-Transmission range switch terminal I Start stop unit terminal 1F-Transmission range switch terminal I Transmission range switch malfunction PCM malfunction Start stop unit malfunction
Courtesy of MAZDA MOTORS CORP.