Toyota Yaris: Cxpi Communication System / Terminals Of Ecu
TERMINALS OF ECU
NOTICE:
-
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, there is an automatic learning function that completes learning when the respective system is used.
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CHECK POWER DISTRIBUTION BOX ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
(a) Remove the main body ECU (multiplex network body ECU).
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| *1 | Power Distribution Box Assembly | *2 | Main Body ECU (Multiplex Network Body ECU) |
(b) Reconnect the power distribution box assembly connectors.
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(c) Measure the voltage and resistance according to the value(s) in the table below.
| Terminal No. (Symbol) | Terminal Description | Condition | Specified Condition |
|---|---|---|---|
| MB-13 (GND1) - Body ground | Ground | Always | Below 1 Ω |
| MB-26 (BECU) - Body ground | Auxiliary battery power supply | Ignition switch off | 11 to 14 V |
| MB-27 (IGR) - Body ground | IG power supply | Ignition switch off | Below 1 V |
| Ignition switch ON | 11 to 14 V |
(d) Install the main body ECU (multiplex network body ECU).
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(e) Measure the voltage and check for pulses according to the value(s) in the table below.
| Terminal No. (Symbol) | Terminal Description | Condition | Specified Condition |
|---|---|---|---|
| 4D-5 - Body ground | CXPI communication line | Ignition switch ON | Pulse generation |
| 4E-43 - Body ground | Rear window defogger signal (output) | Rear window defogger switch off | Below 1.5 V |
| Rear window defogger switch on | 8 to 14 V | ||
| 4B-2 - Body ground | Mirror heater drive signal (output) | Rear window defogger switch off | Below 1.5 V |
| Rear window defogger switch on | 8 to 14 V | ||
| 4C-10 - Body ground | Power return mirror motor drive signal (output) | Outer rear view mirror assembly moves to the return position. | Below 1.5 V |
| Outer rear view mirror assembly not move. | 8 to 14 V | ||
| 4C-21 - Body ground | Power retract mirror motor drive signal (output) | Outer rear view mirror assembly moves to the retract position | Below 1.5 V |
| Outer rear view mirror assembly not move | 8 to 14 V |
SEMICONDUCTOR POWER INTEGRATION ECU
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the A85 and A86 semiconductor power integration ECU connectors.
(c) Connect the cable to the negative (-) auxiliary battery terminal.
(d) Measure the resistance and voltage according to the value(s) in the table below.
| Terminal No. (Symbol) | Terminal Description | Condition | Specified Condition |
|---|---|---|---|
| A85-1 (+B) - Body ground | Auxiliary battery power supply | Ignition switch off | 8 to 14 V |
| A86-5 (-S) - Body ground | Light control LED ECU RH operation signal input | Headlight not illuminated | 6 V or higher |
| Headlight illuminated | Below 1.7 V | ||
| A86-16 (GND2) - Body ground | Ground | Always | Below 1 Ω |
| A86-20 (IG) - Body ground | IG power supply | Ignition switch off | Below 1.5 V |
| Ignition switch ON | 8 to 14 V | ||
| A86-24 (-S) - Body ground | Light control LED ECU LH operation signal input | Headlight not illuminated | 6 V or higher |
| Headlight illuminated | Below 1.7 V | ||
| A86-26 (GND1) - Body ground | Ground | Always | Below 1 Ω |
(e) Reconnect the A85 and A86 semiconductor power integration ECU connectors.
(f) Measure the voltage and check for pulses according to the value(s) in the table below.
| Terminal No. (Symbol) | Terminal Description | Condition | Specified Condition |
|---|---|---|---|
| A86-8 (CXPI) - Body ground | CXPI communication line | Ignition switch ON | Pulse generation |
| A86-1 (L) - Body ground | Light control LED ECU LH operation signal output | Headlight not illuminated | Below 3.0 V |
| Headlight illuminated | 8 V or higher | ||
| A86-2 (L)- Body ground | Light control LED ECU RH operation signal output | Headlight not illuminated | Below 3.0 V |
| Headlight illuminated | 8 V or higher | ||
| A86-17 (L) - Body ground | Front fog light RH operation signal output | Front fog light not illuminated | Below 3.0 V |
| Front fog light illuminated | 8 V or higher | ||
| A86-18 (L) - Body ground | Front fog light LH operation signal output | Front fog light not illuminated | Below 3.0 V |
| Front fog light illuminated | 8 V or higher |
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT:
Use these procedures to troubleshoot the CXPI communication system.
*: Use the GTS.
PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
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2...
Dtc Check / Clear
DTC CHECK / CLEAR CHECK DTC (a) Enter the following menus: Body Electrical / Main Body / Trouble Codes. (b) Check for DTCs. Body Electrical > Main Body > Trouble Codes CLEAR DTC (a) Enter the following menus: Body Electrical / Main Body / Clear DTCs...
Other information:
Toyota Yaris XP210 (2020-2024) Owner's Manual: Outside Mirrors
Mirror type Flat type (driver’s side) Flat surface mirror. Convex type (front passenger side) The mirror has single curvature on its surface. Power mirror adjustment The ignition must be switched to ACC or ON position. To adjust: Rotate the mirror switch to the left or right to choose the left or right side mirror...
Toyota Yaris XP210 (2020-2024) Reapir and Service Manual: Diagnosis System
DIAGNOSIS SYSTEM FUNCTION OF WARNING INDICATOR AND MESSAGE (a) If the pre-collision system is not functioning properly, the driver is warned by the PCS warning light and a warning message is displayed on the multi-information display. Warning Message Detail DTC/RoB PCS warning light "Pre-Collision System Malfunction Visit Your Dealer" Pre-collision system malfunctioning Stored Illuminates "Pre-Collision System Radar In Self Calibration Unavailable See Owner's Manual" Millimeter wave radar sensor assembly misaligned Stored Illuminates "Pre-Collision System Out of Temperature Range Unavailable See Owner's Manual" Millimeter wave radar sensor assembly temperature malfunction Stored Illuminates "Pre-Collision System Unavailable See Owner's Manual" Millimeter wave radar sensor assembly voltage malfunction Determination was made for temporary suspension of system operation due to millimeter wave radar sensor assembly detecting interference from other nearby radar emitters Stored Illuminates "Pre-Collision System Radar Sensor Blocked Unavailable Clean Radar Sensor" Foreign matter attached to millimeter wave radar sensor assembly Stored Illuminates "Front Camera Unavailable See Owner's Manual" Abnormal forward recognition camera voltage Stored Illuminates "Front Camera Out of Temperature Range Unavailable Wait until Normal Temperature" Forward recognition camera temperature outside of operational range Stored Illuminates "Front Camera Low Visibility Unavailable See Owner's Manual" Foreign matter attached to forward recognition camera or area of windshield in front of forward recognition camera Forward recognition camera or area of windshield in front of forward recognition camera is fogged up Stored Illuminates "VSC Turned Off Pre-Collision Brake System Unavailable" VSC system is disabled Not stored Illuminates PCS Warning Light Illumination Status PCS Warning Light Condition Illuminates Pre-collision system malfunctioning Pre-collision system temporarily disabled During pre-collision system radar alignment Pre-collision system disabled VSC system disabled Not illuminated Other INITIAL CHECK (a) An initial check is performed when the ignition switch is off for more than 2 seconds and then turned ON...
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Refueling
Before refueling, close all the doors, windows, and the liftgate/trunk lid, and switch the ignition OFF.
To open the fuel-filler lid, pull the remote fuel-filler lid release.
