Toyota Corolla Cross: Hybrid Vehicle Control ECU Communication Stop Mode
DESCRIPTION
Detection Item
|
Symptom
|
Trouble Area
|
Hybrid Vehicle Control ECU Communication Stop Mode
|
Communication stop for "Hybrid Vehicle Control" is indicated on the "Communication
Bus Check" screen of the GTS.
Click here
|
- Hybrid vehicle control ECU branch line or connector
- Power source circuit of hybrid vehicle control ECU
- Hybrid vehicle control ECU ground circuit
- Hybrid vehicle control ECU
|
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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- Inspect the fuses for circuits related to this system before performing
the following procedure.
- Before replacing the hybrid vehicle control ECU, refer to Registration.
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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 (HYBRID VEHICLE CONTROL ECU BRANCH LINE)
|
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the hybrid vehicle control ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
I249-51 (CA1H) - I249-52 (CA1L)
|
Cable disconnected from negative (-) auxiliary battery terminal
|
54 to 69 Ω
|
|
|
*a
|
Front view of wire harness connector
(to Hybrid Vehicle Control ECU)
|
|
|
NG |
|
REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (HYBRID VEHICLE CONTROL
ECU)
|
OK |
|
|
2.
|
CHECK ECU POWER SOURCE CIRCUIT
|
(a) Check the ECU power source circuit.
Click here
OK |
|
REPLACE HYBRID VEHICLE CONTROL ECU
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)
|
READ NEXT:
DESCRIPTION
Detection Item
Symptom
Trouble Area
Brake Actuator (Skid Control ECU) Communication Stop Mode
Communication stop for "Ski
DESCRIPTION
Detection Item
Symptom
Trouble Area
Brake Booster (Skid Control ECU) Communication Stop Mode
Communication stop for "Brak
DESCRIPTION
Detection Item
Symptom
Trouble Area
Clearance Warning ECU Communication Stop Mode
Communication stop for "Clearance Warni
SEE MORE:
REMOVAL
CAUTION / NOTICE / HINT
COMPONENTS (REMOVAL)
Procedure
Part Name Code
1
PRECAUTION
-
-
-
2
DISCONNECT CABLE FROM NEGATIVE AUXILIARY BATTE
REMOVAL
CAUTION / NOTICE / HINT
COMPONENTS (REMOVAL)
Procedure
Part Name Code
1
PRECAUTION
-
-
-
2
DISCONNECT CABLE FROM NEGATIVE AUXILIARY BATTE