DTC P1650: Notes

DTC P1650 (MZI-3.5) DETECTION CONDITION AND POSSIBLE CAUSES

DTC P1650	PSP switch out of self-test range
DETECTION CONDITION	In the KOEO self-test, this DTC indicates the PSP input to the PCM is high. In the KOER self-test, this DTC indicates the PSP input did not change state.
POSSIBLE CAUSE	The steering wheel must be turned during KOER self-test PSP switch malfunction Open circuit between PSP switch terminal A and PCM terminal 2I Short to ground circuit between PSP switch terminal A and PCM terminal 2I

Fig 1: PSP Switch Circuit Diagram

Courtesy of MAZDA MOTORS CORP.