Toyota Yaris: Power Integration System / How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
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Use these procedures to troubleshoot the power integration system.
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*: Use the GTS.
PROCEDURE
1. | VEHICLE BROUGHT TO WORKSHOP |
NEXT |
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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 |
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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 |
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(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 |
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6. | OVERALL ANALYSIS AND TROUBLESHOOTING* |
(a) Data List / Active Test
Click here
(b) Terminals of ECU
Click here
NEXT |
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7. | ADJUST, REPAIR OR REPLACE |
NEXT |
| END |
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...
Other information:
INSTALLATION CAUTION / NOTICE / HINT HINT:
Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.
PROCEDURE 1. INSTALL REAR SUSPENSION SUPPORT ASSEMBLY (a) Secure the rear suspension support assembly in a vise using aluminum plates...
DESCRIPTION These DTCs are stored when there is a CAN communication malfunction between the certification ECU (smart key ECU assembly) and ECM, main body ECU (multiplex network body ECU) or combination meter assembly. DTC No. Detection Item DTC Detection Condition Trouble Area Note U010087 Lost Communication with ECM/PCM "A" Missing Message CAN communication malfunction between certification ECU (smart key ECU assembly) and ECM (1-trip detection logic*) ECM
Turn the ignition switch to ON and wait at least 10 seconds...