Toyota Yaris: Power Integration System / Precaution
PRECAUTION
PRECAUTION FOR SEMICONDUCTOR POWER INTEGRATION ECU
(a) Do not remove or install the semiconductor power integration ECU and power distribution box assembly with the negative (-) auxiliary battery terminal connected.
NOTICE:
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After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
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When disconnecting and reconnecting the auxiliary battery.
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(b) Make sure that the semiconductor power integration ECU and power distribution box assembly is not exposed to water, as it is not waterproof.
(c) Some load is connected to a dedicated circuit to prevent overcurrent. Therefore, parts other than those specified for the vehicle may not be able to be used.
(d) When replacing the semiconductor power integration ECU and power distribution box assembly, the system may not operate normally if the same part number is not used.
(e) Check that systems are operating normally before proceeding with troubleshooting.
PARTS LOCATION ILLUSTRATION
*1 SEMICONDUCTOR POWER INTEGRATION ECU *2 NO. 1 ENGINE ROOM RELAY BLOCK - STD P/I NO. 1 FUSE - INP STD NO. 1-1 FUSE ILLUSTRATION
*1 MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) *2 POWER DISTRIBUTION BOX ASSEMBLY - ECU-IGR NO...
Other information:
DESCRIPTION The power steering ECU assembly receives signals from the steering sensor, skid control ECU (brake actuator assembly), forward recognition camera, ECM and clearance warning ECU assembly via CAN communication. DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Return-to-normal Condition Note U010087 Lost Communication With ECM/PCM "A" Missing Message Lost communication with ECM
CAN communication system
ECM
EPS warning light: Does not come on After normal confirmation - U012687 Lost Communication with Steering Angle Sensor Module Missing Message Lost communication with steering sensor
CAN communication system
Steering sensor
EPS warning light: Does not come on After normal confirmation - U012987 Lost Communication with Brake System Control Module Missing Message Lost communication with skid control ECU (brake booster with master cylinder assembly)
CAN communication system
Skid control ECU (Brake booster with master cylinder assembly)(for TMC Made HV Model)
Skid control ECU (Brake actuator assembly)(for TMMF Made HV Model)
EPS warning light: Does not come on After normal confirmation - U014087 Lost Communication with Body Control Module Missing Message Lost communication with main body ECU (multiplex network body ECU)
CAN communication system
Main body ECU (multiplex network body ECU)
EPS warning light: Does not come on After normal confirmation - U023A87 Lost Communication with Image Processing Module "A" Missing Message Lost communication with forward recognition camera
CAN communication system
Forward recognition camera
EPS warning light: Does not come on After normal confirmation w/ Toyota Safety Sense PROCEDURE 1...
COMPONENTS ILLUSTRATION
*1 FRONT SEAT HEADREST ASSEMBLY *2 FRONT OUTER SEAT TRACK BRACKET COVER *3 FRONT INNER SEAT TRACK BRACKET COVER *4 OUTER SEAT TRACK BRACKET COVER *5 INNER SEAT TRACK BRACKET COVER *6 FRONT SEAT ASSEMBLY
Tightening torque for "Major areas involving basic vehicle performance such as moving/turning/stopping" : N*m (kgf*cm, ft...
Categories
The front seat belt pretensioners are designed to deploy in moderate or
severe frontal, near frontal collisions.
In addition, the pretensioners operate when a side collision or a rollover
accident is detected. The pretensioners operate differently
depending on what types of air bags are equipped. For more details
about the seat belt pretensioner operation, refer to the SRS Air Bag
Deployment Criteria.
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