Toyota Corolla Cross: Clearance Warning ECU Communication Stop Mode
DESCRIPTION
Detection Item
|
Symptom
|
Trouble Area
|
Clearance Warning ECU Communication Stop Mode
|
Communication stop for "Clearance Warning (Intuitive Parking Assist)"
is indicated on the "Communication Bus Check" screen of the GTS.
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|
- Clearance warning ECU assembly branch line or connector
- Power source circuit of clearance warning ECU assembly
- Clearance warning ECU assembly ground circuit
- Clearance warning ECU assembly
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic
laws.
NOTICE:
- Because the order of diagnosis is important to allow correct diagnosis,
make sure to begin troubleshooting using How to Proceed with Troubleshooting
when CAN communication system related DTCs are output.
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- Before measuring the resistance of the CAN bus, turn the ignition switch
off and leave the vehicle for 1 minute or more without operating the key or
any switches, or opening or closing the doors. After that, disconnect the cable
from the negative (-) auxiliary battery terminal and leave the vehicle for 1
minute or more before measuring the resistance.
- 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.
HINT:
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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- Some parts must be initialized and set when replacing or removing and installing
parts.
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- After performing repairs, perform the DTC check procedure and confirm that
the DTCs are not output again.
DTC check procedure: Turn the ignition switch to ON and wait for 1 minute
or more. Then operate the suspected malfunctioning system and drive the vehicle
at 60 km/h (37 mph) or more for 5 minutes or more.
- After the repair, perform the CAN bus check and check that all the ECUs
and sensors connected to the CAN communication system are displayed as normal.
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HINT:
- Before disconnecting related connectors for inspection, push in on each
connector body to check that the connector is not loose or disconnected.
- When a connector is disconnected, check that the terminals and connector
body are not cracked, deformed or corroded.
PROCEDURE
1.
|
CHECK FOR OPEN IN CAN BUS LINES (CLEARANCE WARNING ECU ASSEMBLY BRANCH
LINE)
|
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the clearance warning ECU assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
I24-17 (R1) - I24-18 (R2)
|
Cable disconnected from negative (-) auxiliary battery terminal
|
54 to 69 Ω
|
|
|
*a
|
Front view of wire harness connector
(to Clearance Warning ECU Assembly)
|
|
|
NG |
|
REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (CLEARANCE WARNING ECU
ASSEMBLY)
|
OK |
|
|
2.
|
CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)
|
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
I24-31 (E) - Body ground
|
Cable disconnected from negative (-) auxiliary battery terminal
|
Below 1 Ω
|
|
|
*a
|
Front view of wire harness connector
(to Clearance Warning ECU Assembly)
|
|
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)
|
OK |
|
|
3.
|
CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)
|
(a) Reconnect the cable to the negative (-) auxiliary battery terminal.
|
|
*a
|
Front view of wire harness connector
(to Clearance Warning ECU Assembly)
|
|
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
|
Condition
|
Specified Condition
|
I24-1 (IG) - Body ground
|
Ignition switch ON
|
10.5 to 16 V
|
OK |
|
REPLACE CLEARANCE WARNING ECU ASSEMBLY
|
NG |
|
GO TO STOP AND START SYSTEM (BACKUP BOOST CONVERTER CIRCUIT)
|
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Symptom
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Detection Item
Symptom
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Detection Item
Symptom
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DESCRIPTION
The ABS solenoid relay and solenoid valves are built into the
brake actuator assembly.
The front solenoid valve RH controls the brake fluid pressure
of the front wheel cylinder RH of the vehicle.
When this DTC is stored, the fail-safe function operates and
the ABS solenoid relay