Toyota Yaris: Lin Communication System / Diagnosis System
DIAGNOSIS SYSTEM
DESCRIPTION
The main body ECU (multiplex network body ECU) and certification ECU (smart key ECU assembly) control the LIN communication system. LIN communication system data and Diagnostic Trouble Codes (DTCs) can be read through the Data Link Connector 3 (DLC3).
When the system seems to be malfunctioning, use the GTS to check for malfunctions and perform repairs.
CHECK DLC3
(a) Check the DLC3.
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INSPECT AUXILIARY BATTERY VOLTAGE
(a) Measure the auxiliary battery voltage with the ignition switch off.
Standard Voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the auxiliary battery.
TERMINALS OF ECU CHECK POWER DISTRIBUTION BOX ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
*1 POWER DISTRIBUTION BOX ASSEMBLY *2 MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (a) Remove main body ECU (multiplex network body ECU)...
DTC CHECK / CLEAR CHECK DTC (a) Check for DTCs. Body Electrical > Main Body > Trouble Codes Body Electrical > Smart Key > Trouble Codes Body Electrical > Power Source Control > Trouble Codes (b) Check the details of the DTCs...
Other information:
TERMINALS OF ECU
*1 Power Distribution Box Assembly *2 Main Body ECU (Multiplex Network Body ECU) CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND POWER DISTRIBUTION BOX ASSEMBLY (a) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly...
TERMINALS OF ECU CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
(a) Disconnect the H46 certification ECU (smart key ECU assembly) connector. (b) Measure the voltage and resistance according to the value(s) in the table below. Tester Connection Terminal Description Condition Specified Condition Related Data List Item H46-29 (E) - Body ground Ground Always Below 1 Ω - H46-6 (+B) - H46-29 (E) Power supply Always 11 to 14 V - H45-22 (CUTB) - H46-29 (E) Dark current cut pin* Ignition switch off 11 to 14 V -
*: In order to prevent the vehicle auxiliary battery from being depleted when the vehicle is shipped long distances, a fuse that cuts unnecessary electrical load while the vehicle is being shipped is installed in the circuit...
Categories
WARNING
When removing the fuel-filler cap, loosen the cap slightly and wait
for
any hissing to stop, then remove it
Fuel spray is dangerous. Fuel can burn skin and eyes and cause illness
if
ingested. Fuel spray is released when there is pressure in the fuel tank and
the fuel-filler cap is removed too quickly.
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