Page 760 - Workshop Manual - Tunland (2017)
P. 760

04-74                      DIAGNOSTICS - ENGINE CONTROL SYSTEM

      04                                                       DTC inspection
                     DTC               DTC defination                                 Trouble location
                                                                 conditions

                                      Electronic throttle
                                    control actuator drive
                                      circuit - voltage is
                    P175
                                    higher than normal or
                                     short circuit to high
                                    voltage power supply
                                    Electronic accelerator
                                    control actuator drive
                                      circuit - voltage is
                    P176
                                    below normal or short
                                     circuit to low voltage
                                        power supply                                • Electronic throttle
                                                                                      control actuator
                                      Electronic throttle                           • The electronic
                                    control actuator - The  • When the key            throttle control
                    P177            mechanical system is      switch is in ON         actuator connector
                                      not responsive or       position, the           is in poor contact
                                        misalignment          diagnosis continues     and the sensor
                                                              to run
                                    Engine intake throttle                            harness is broken
                                       actuator position                              or shorted .
                                        sensor circuit -                            • ECM
                    P3539              voltage is above
                                     normal or shorted to
                                     high voltage power
                                            supply.
                                    Engine intake throttle
                                       actuator position
                                        sensor circuit -
                    P3541              voltage is below
                                     normal or shorted to
                                      low voltage power
                                            supply.

           Diagnosis Procedure

                CAUTION

           •      To implement the following steps, ensure that ECM is grounded properly.
           •      Before conducting electric diagnosis, do refer to the reference circuit diagram
                  and the element information.
           •      Before conducting measurement, check the pins of connectors for rupture,
                  looseness and rust, and ensure that the pins are contacted properly.
           •      If the connection is good, check the sensor signal voltage when moving the
                  connector and harness. If a fault occurs, the voltage display on the diagnostic
                  instrument will change.
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