Toyota Yaris: Power Integration System / Fail-safe Chart

Toyota Yaris XP210 (2020-2024) Reapir and Service Manual / Power Source & Network / Power Distribution / Power Integration System / Fail-safe Chart

FAIL-SAFE CHART

FAIL-SAFE FOR SPECIFIC FUNCTIONS

(a) When semiconductor power integration ECU microcomputer have some malfunction, only right head light LO and right smart LDM power source can turn on or off with backup circuit in ignition switch ON. However, right head light LO and right smart LDM power source cannot turn on or off in ignition switch OFF.

Dtc Check / Clear

DTC CHECK / CLEAR CHECK DTC (a) Check semiconductor power integration ECU (1) Check for DTCs. Body Electrical > Power Integration No.1 > Trouble Codes (b) Check power distribution box assembly (1) Check for DTCs...

Data List / Active Test

DATA LIST / ACTIVE TEST READ DATA LIST NOTICE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not...

Other information:

Toyota Yaris XP210 (2020-2024) Reapir and Service Manual: Antenna Coil Circuit Voltage Out of Range (B27841C)

DESCRIPTION When an open or short circuit is detected in the transponder key amplifier coil built into the engine switch, the certification ECU (smart key ECU assembly) stores this DTC. This DTC is also stored as a history DTC. DTC No. Detection Item DTC Detection Condition Trouble Area Note B27841C Antenna Coil Circuit Voltage Out of Range The transponder key amplifier coil built into the engine switch is open (see below) or shorted (determined by communication with certification ECU (smart key ECU assembly))...

Toyota Yaris XP210 (2020-2024) Reapir and Service Manual: A/C Switch Indicator does not Turn On

DESCRIPTION If none of the switch indicators on the air conditioning control assembly illuminate, the following factors may be the cause. Symptom Factor A/C switch indicator does not illuminate Vehicle control history (RoB) Air conditioning amplifier assembly malfunction Air conditioning control assembly malfunction A/C switch malfunction A/C switch indicator malfunction (including when indicator turned off without switch operation) Servo motor initialization (incomplete) Mechanical locking of damper and damper link Refrigerant pressure is extremely low Low detected ambient temperature (including thermistor assembly malfunction) PROCEDURE 1...