1. Shine an incandescent light (60 W)
on the solar radiation sensor from a distance of approximately 100 mm {3.94 in}.
2. Connect positive (+) lead to terminal A and negative (−) lead to terminal B of the solar radiation sensor.

, replace the solar radiation sensor.
Solar radiation sensor removal/installation
Ambient temperature sensor removal/installationMazda 6 Service Manual: System Operation
Make sure that the Lane-keep Assist System (LAS) & Lane Departure Warning System
(LDWS) OFF indicator light in the instrument cluster is turned off. When the Lane-keep
Assist System (LAS) & Lane Departure Warning System (LDWS) OFF indicator light is
turned on, press the switch and make ...
Mazda 6 Service Manual: Procedures for determining the location of a malfunction
System Wiring Diadram
PCM
1. Check the display of DTC U0121 and/or U0155, using the SST (WDS or
equivalent). (See DTC TABLE.)
2. Referring to the following table, determine the malfunctioning part of the
CAN system.
ABS/TCS HU/CM or DSC HU/CM
1. Accec and monitor the PCM MSG and IC MSGo ...