Toyota Yaris: Power Integration System / How To Proceed With Troubleshooting

Toyota Yaris XP210 (2020-2025) Reapir and Service Manual / Power Source & Network / Power Distribution / Power Integration System / How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

  • Use these procedures to troubleshoot the power integration system.
  • *: Use the GTS.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP
NEXT

2.

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 before proceeding.

NEXT

3.

CHECK COMMUNICATION FUNCTION OF CXPI COMMUNICATION SYSTEM*

(a) Using the GTS, check the CXPI communication function to ensure that there are no malfunctions in the communication system.

Click here

DTCs output

GO TO CXPI COMMUNICATION SYSTEM

No DTCs output

4.

CHECK FOR DTC*

(a) Check for DTCs and make a note of any codes that are output.

Click here

(b) Clear the DTCs.

(1) Semiconductor power integration ECU

Body Electrical > Power Integration No.1 > Clear DTCs

(2) power distribution box assembly

Body Electrical > Power Distribution Box > Clear DTCs

(c) Recheck for DTCs.

(1) Semiconductor power integration ECU

Body Electrical > Power Integration No.1 > Trouble Codes

(2) power distribution box assembly

Body Electrical > Power Distribution Box > Trouble Codes
DTCs output

GO TO DIAGNOSTIC TROUBLE CODE CHART

No DTCs output

5.

PROBLEM SYMPTOMS TABLE

(a) Refer to the Problem Symptoms Table.

Click here

Fault is listed in problem symptoms table

ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH PROBLEM SYMPTOMS TABLE
Fault is not listed in problem symptoms table

6.

OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Data List / Active Test

Click here

(b) Terminals of ECU

Click here

NEXT

7.

ADJUST, REPAIR OR REPLACE
NEXT

END

    System Description

    SYSTEM DESCRIPTION LOAD OPERATION OUTPUT (a) Load is turned on or off according to the operation signals and switch signals from each ECU. Components Semiconductor Power Integration ECU Power Distribution Box Assembly Operation Signal Communication Support *1: w/ Front Seat Heater *2: Built into power distribution box assembly Headlight ECU Assembly ○ - Not supported Fog Light Assembly ○ - Supported Rear Window Defogger / Mirror Heater - ○ Supported Taillight - ○ Supported Rear Fog Light - ○ Supported Back-up Light - ○ Not supported Outer Rear View Mirror Assembly - ○ Supported Panel Illumination - ○ Supported Seat Heater LH*1 High/Low - ○ Not supported Seat Heater RH*1 High/Low - ○ Not supported Passenger Seat Buckle Switch Delegated Input - ○ - Occupant Detection Sensor Delegated Input - ○ - Rear Seat RH Buckle Switch Delegated Input - ○ - Rear Seat CTR Buckle Switch Delegated Input - ○ - Rear Seat LH Buckle Switch Delegated Input - ○ - IGR Relay*2 - ○ Not supported SEMICONDUCTOR FUSE FUNCTION (a) When a malfunction current occurs during load operation, the current is shut off before the electrical lines emit smoke, and then load is turned off...

    Utility

    U..

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