Page 492 - Workshop Manual - Aumark (BJ1051)
P. 492

04-348
                                                    Diagnosis- combination meter

               Coolant temperature gauge malfunction


               Circuit diagram





                                                                                     Combination   sensor



                             Water temperature sensor
                                                  Blue-black              Blue-black
                                                                                        Water temperature

   04








                               Self- grounding






               Diagnostic Procedure
               1.     Checking coolant temperature sensor
               (a)    Ignition switch: OFF.
               (b)    Remove coolant temperature sensor.
               Caution:
               Removal of coolant temperature sensor should be made with engine cold (or coolant temperature ≤
               40℃).
               (c)    Use a multimeter to measure resistances of coolant temperature sensor under different
                      temperatures. The reference values should conform to the following table.
                Temperature               40                 60                  90                102
                (℃)

                Resistance (Ω)        287.4 ± 30          134 ± 13.5         51.2 ± 4.3          38.5 ± 1

               Are check results normal?
               Yes >   Go to step 2.
               No >    Replace coolant temperature sensor.





















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