U1000 CAN COMM CIRCUIT
Description
CAN (Controller Area Network) is a serial communication system for real time application. It is an on-vehicle multiplex communication system with high data communication speed and excellent error detection ability.
Many electronic control units are equipped onto vehicles, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with two communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only. Refer to LAN-30, "CAN COMMUNICATION SYSTEM : CAN Communication Signal Chart".
DTC Logic
DTC DETECTION LOGIC
DTC | Items (CONSULT screen terms) | DTC detection condition | Possible cause |
U1000 | CAN COMM CIRCUIT | When A/C auto amp. is not transmitting or receiving CAN communication signal for 2 or more seconds. | CAN communication system |
DTC CONFIRMATION PROCEDURE
1.PERFORM SELF-DIAGNOSIS
With CONSULT
Is DTC detected? YES >> Refer to HAC-58, "Diagnosis Procedure".
NO >> Refer to GI-39, "Intermittent Incident".
Diagnosis Procedure
1.CHECK CAN COMMUNICATION SYSTEM
Check CAN communication system. Refer to LAN-16, "Trouble Diagnosis Flow Chart".
>> Inspection End.
U1010 CONTROL UNIT (CAN)
Description
Initial diagnosis of A/C auto amp.
DTC Logic
DTC DETECTION LOGIC
DTC | Items (CONSULT screen terms) | DTC detection condition | Possible cause |
U1010 | CONTROL UNIT (CAN) | When detecting error during the initial diagnosis of CAN controller of A/C auto amp. | A/C auto amp. |
DTC CONFIRMATION PROCEDURE
1.PERFORM SELF-DIAGNOSIS
With CONSULT
Is DTC detected? YES >> Refer to HAC-59, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis Procedure
1.REPLACE A/C AUTO AMP.
Replace A/C auto amp. Refer to HAC-105, "Removal and Installation".
>> Inspection End.
B2578, B2579 IN-VEHICLE SENSOR
DTC Logic
DTC DETECTION LOGIC
NOTE:
DTC | Items (CONSULT screen terms) | DTC detection condition | Possible cause |
B2578 | IN-VEHICLE SENSOR | The in-vehicle sensor recognition temperature is too high. |
|
B2579 | The in-vehicle sensor recognition temperature is too low. |
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
Is DTC detected? YES >> Refer to HAC-60, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis Procedure
Regarding Wiring Diagram information, refer to HAC-41, "Wiring Diagram".
1.Check in-vehicle sensor power supply
Is the inspection result normal? Yes >> go to 2.
No >> go to 4.
2.Check in-vehicle sensor ground circuit
Is the inspection result normal? YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK IN-VEHICLE SENSOR
Check in-vehicle sensor. Refer to HAC-61, "Component Inspection".
Is the inspection result normal? YES >> Replace A/C auto amp. Refer to HAC-105, "Removal and Installation".
NO >> Replace in-vehicle sensor. Refer to HAC-107, "Removal and Installation".
4.Check in-vehcile sensor power supply circuit for open
Is the inspection result normal? Yes >> go to 5.
No >> repair harness or connector.
5.Check in-vehicle sensor power supply circuit for ground short
Check continuity between in-vehicle sensor harness connector and ground.
Is the inspection result normal? Yes >> go to 6.
No >> repair harness or connector.
6.Check in-vehicle sensor power supply circuit for power short
Is the inspection result normal? YES >> Replace A/C auto amp. Refer to HAC-105, "Removal and Installation".
NO >> Repair harness or connector.
Component Inspection
1.Check in-vehicle sensor
Is the inspection result normal? YES >> Inspection End.
NO >> Replace in-vehicle sensor. Refer to HAC-107, "Removal and Installation".
B257B, B257C AMBIENT SENSOR
DTC Logic
DTC DETECTION LOGIC
NOTE:
DTC | Items (CONSULT screen terms) | DTC detection condition | Possible cause |
B257B | AMBIENT SENSOR | The ambient sensor recognition temperature is too high. |
|
B257C | The ambient sensor recognition temperature is too low. |
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
Is DTC detected? YES >> Refer to HAC-63, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis Procedure
Regarding Wiring Diagram information, refer to HAC-41, "Wiring Diagram".
1.Check ambient sensor power supply
Is the inspection result normal? Yes >> go to 2.
No >> go to 4.
2.Check ambient sensor ground circuit
Is the inspection result normal? Yes >> go to 3.
No >> repair harness or connector
3.Check ambient sensor
Check ambient sensor. Refer to hac-64, "component inspection".
Is the inspection result normal? Yes >> replace a/c auto amp. Refer to hac-105, "removal and installation".
No >> replace ambient sensor. Refer to hac-106, "removal and installation".
4.Check ambient sensor power supply circuit for open
Is the inspection result normal? Yes >> go to 5.
No >> repair harness or connector.
5.Check ambient sensor power supply circuit for ground short
Check continuity between ambient sensor harness connector and ground.
Is the inspection result normal? Yes >> go to 6.
No >> repair harness or connector.
6.Check ambient sensor power supply circuit for power short
Is the inspection result normal? Yes >> replace a/c auto amp. Refer to hac-105, "removal and installation".
No >> repair harness or connector.
Component Inspection
1.Check ambient sensor
Is the inspection result normal? Yes >> inspection end.
No >> replace ambient sensor. Refer to hac-106, "removal and installation".
B2581, B2582 INTAKE SENSOR
DTC Logic
Dtc detection logic
NOTE:
DTC | Items (CONSULT screen terms) | DTC detection condition | Possible cause |
B2581 | INTAKE SENSOR | The intake sensor recognition temperature is too high. |
|
B2582 | The intake sensor recognition temperature is too low. |
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
Is DTC detected? YES >> Refer to HAC-66, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis Procedure
Regarding Wiring Diagram information, refer to HAC-41, "Wiring Diagram".
1.Check intake sensor power supply
Is the inspection result normal? YES >> GO TO 2.
NO >> GO TO 4.
2.Check intake sensor ground circuit
Is the inspection result normal? Yes >> go to 3.
No >> repair harness or connector.
3.Check intake sensor
Check intake sensor. Refer to hac-67, "component inspection".
Is the inspection result normal? Yes >> replace a/c auto amp. Refer to hac-105, "removal and installation".
No >> replace intake sensor. Refer to hac-109, "removal and installation".
4.Check intake sensor power supply circuit for open
Is the inspection result normal? Yes >> go to 5.
No >> repair harness or connector.
5.Check intake sensor power supply circuit for short to ground
Check continuity between intake sensor harness connector and ground.
Is the inspection result normal? Yes >> go to 6.
No >> repair harness or connector.
6.Check intake sensor power supply circuit for short to voltage
Is the inspection result normal? Yes >> replace a/c auto amp. Refer to hac-105, "removal and installation".
No >> repair harness or connector.
Component Inspection
1.Check intake sensor
Is the inspection result normal? YES >> Inspection End.
NO >> Replace intake sensor. Refer to HAC-109, "Removal and Installation".
B2630, B2631 SUNLOAD SENSOR
DTC Logic
Dtc detection logic
Note:
When performing the diagnosis indoors, light the sunload sensor with a lamp (60w or more).
Dtc | Items (consult screen terms) | Diagnostic item is detected when... | Possible cause |
B2630 | Sunload sen (short) | Detected calorie at sunload sensor 1677 w/m2 (1442 kcal/m2В·h) or more |
|
B2631 | Sunload sen (open) | Detected calorie at sunload sensor 33 w/m2 (28 kcal/m2В·h) |
Dtc confirmation procedure
1.Check with self-diagnosis function of consult
NOTE:
When performing the diagnosis indoors, light the sunload sensor with a lamp (60W or more).
Is dtc no.“B2630” or “b2631” displayed? Yes >> perform trouble diagnosis for the sunload sensor. Refer to hac-69, "diagnosis procedure".
No >> inspection end.
Diagnosis Procedure
Regarding Wiring Diagram information, refer to HAC-41, "Wiring Diagram".
1.Check sunload sensor power supply
Is the inspection result normal? YES >> GO TO 2.
NO >> GO TO 4.
2.Check continuity between sunload sensor and a/c auto amp.
Is the inspection result normal? YES >> GO TO 3.
NO >> Repair harness or connector.
3.Check sunload sensor
Is the inspection result normal? YES >> Replace A/C auto amp. Refer to HAC-105, "Removal and Installation".
NO >> Replace sunload sensor. Refer to HAC-108, "Removal and Installation".
4.Check continuity between sunload sensor and a/c auto amp.
Is the inspection result normal? Yes >> replace a/c auto amp. Refer to hac-105, "removal and installation".
No >> repair harness or connector.
Component Inspection
1.Check sunload sensor
Note:
Select a place in direct sunlight when checking sunload sensor.
Is the inspection result normal? Yes >> inspection end.
No >> replace sunload sensor. Refer to hac-108, "removal and installation".
B27A2, B27A3, B27A4, B27A5 AIR MIX DOOR MOTOR (DRIVER SIDE)
DTC Logic
Dtc detection logic
Note:
Dtc | Items (consult screen terms) | Dtc detection condition | Possible cause |
B27a2 | DR AIR MIX DOOR MOT | Short or open circuit of air mix door motor drive signal terminal 1. |
|
B27a3 | Short or open circuit of air mix door motor drive signal terminal 2. | ||
B27a4 | Short or open circuit of air mix door motor drive signal terminal 3. | ||
B27a5 | v |
Dtc confirmation procedure
1.Perform dtc confirmation procedure
With consult
Is DTC detected? YES >> Refer to HAC-74, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis Procedure
Regarding Wiring Diagram information, refer to HAC-41, "Wiring Diagram".
1.Check air mix door motor power supply
Is the inspection result normal? Yes >> go to 2.
No >> repair harness or connector between air mix door motor and fuse.
2.Check air mix door motor lh drive signal circuit for open
Is the inspection result normal? Yes >> go to 3.
No >> repair harness or connector.
3.Check air mix door motor lh drive signal circuit for short
Check continuity between air mix door motor LH harness connector and A/C auto amp. harness connector.
Is the inspection result normal? Yes >> go to 4.
No >> repair harness or connector.
4.Check air mix door motor lh
Check air mix door motor lh. Refer to hac-75, "component inspection".
Is the inspection result normal? Yes >> replace a/c auto amp. Refer to hac-105, "removal and installation".
No >> replace air mix door motor lh. Refer to hac-112, "air mix door motor : removal and installation - air mix door motor lh".
Component Inspection
1.Check air mix door motor lh
Is the inspection result normal? YES >> Inspection End.
NO >> Replace air mix door motor LH. Refer to HAC-112, "AIR MIX DOOR MOTOR : Removal and Installation - Air Mix Door Motor LH".
B27AA, B27AB, B27AC, B27AD AIR MIX DOOR MOTOR (PASSENGER SIDE)
DTC Logic
Dtc detection logic
Note:
Dtc | Items (consult screen terms) | Dtc detection condition | Possible cause |
B27aa | As air mix door mot | Short or open circuit of air mix door motor drive signal terminal 1. |
|
B27AB | Short or open circuit of air mix door motor drive signal terminal 2. | ||
B27ac | Short or open circuit of air mix door motor drive signal terminal 3. | ||
B27ad | Short or open circuit of air mix door motor drive signal terminal 4. |
Dtc confirmation procedure
1.Perform dtc confirmation procedure
With consult
Is DTC detected? YES >> Refer to HAC-74, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis Procedure
Regarding wiring diagram information, refer to hac-41, "wiring diagram".
1.Check air mix door motor rh power supply
Is the inspection result normal? Yes >> go to 2.
No >> repair harness or connector.
2.Check air mix door motor drive signal circuit for open
Is the inspection result normal? Yes >> go to 3.
No >> repair harness or connector.
3.Check air mix door motor RH drive signal circuit for short
Check continuity between air mix door motor rh harness connector and a/c auto amp. Harness connector.
Is the inspection result normal? Yes >> go to 4.
No >> repair harness or connector.
4.Check air mix door motor rh
Check air mix door motor rh. Refer to hac-75, "component inspection".
Is the inspection result normal? Yes >> replace a/c auto amp. Refer to hac-105, "removal and installation".
No >> replace air mix door motor rh. Refer to hac-112, "air mix door motor : removal and installation - air mix door motor rh".
Component Inspection
1.Check air mix door motor RH
Is the inspection result normal? Yes >> inspection end.
NO >> Replace air mix door motor RH. Refer to HAC-112, "AIR MIX DOOR MOTOR : Removal and Installation - Air Mix Door Motor RH".
B27A6, B27A7, B27A8, B27A9 MODE DOOR MOTOR
DTC Logic
Dtc detection logic
Note:
Dtc | Items (consult screen terms) | Dtc detection condition | Possible cause |
B27A6 | MODE DOOR MOTOR | Short or open circuit of mode door motor drive signal terminal 1. |
|
B27A7 | Short or open circuit of mode door motor drive signal terminal 2. | ||
B27A8 | Short or open circuit of mode door motor drive signal terminal 3. | ||
B27A9 | Short or open circuit of mode door motor drive signal terminal 4. |
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
Is DTC detected? YES >> Refer to HAC-77, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis Procedure
Regarding Wiring Diagram information, refer to HAC-41, "Wiring Diagram".
1.Check mode door motor power supply
Is the inspection result normal? Yes >> go to 2.
No >> repair harness or connector between mode door motor and fuse.
2.Check mode door motor drive signal circuit for open
Is the inspection result normal? Yes >> go to 3.
No >> repair harness or connector.
3.Check mode door motor drive signal circuit for short
Check continuity between mode door motor harness connector and a/c auto amp. Harness connector.
Is the inspection result normal? YES >> GO TO 4.
NO >> Repair harness or connector.
4.Check mode door motor
Check mode door motor. Refer to HAC-78, "Component Inspection".
Is the inspection result normal? YES >> Replace A/C auto amp. Refer to HAC-105, "Removal and Installation".
NO >> Replace mode door motor. Refer to HAC-112, "MODE DOOR MOTOR : Removal and Installation".
Component Inspection
1.Check mode door motor
Is the inspection result normal? Yes >> inspection end.
No >> replace mode door motor. Refer to hac-112, "mode door motor : removal and installation".
B27A0, B27A1 INTAKE DOOR MOTOR
DTC Logic
Dtc detection logic
Note:
Dtc | Items (consult screen terms) | Dtc detection condition* | Possible cause |
B27A0 | Intake door motor | Pbr opening angle of intake door motor is 50% or more. (Pbr feedback signal voltage of intake door motor is 2.5 V or more) |
|
B27A1 | Pbr opening angle of intake door motor is 30% or less. (Pbr feedback signal voltage of intake door motor is 1.5 V or less) |
*: A/c auto amp. Operates intake door motor according to target value of pbr opening angle at 40% when performing self-diagnosis.
Dtc confirmation procedure
1.Perform dtc confirmation procedure
With consult
Is DTC detected? YES >> Refer to HAC-79, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis Procedure
Regarding wiring diagram information, refer to hac-41, "wiring diagram".
1.Check intake door motor operation
Does the intake door motor operate? Yes >> go to 2.
No >> go to 8.
2.Check intake door motor PBR power supply
Is the inspection result normal?
Yes >> go to 3.
No >> go to 7.
3.Check intake door motor pbr ground circuit for open
Is the inspection result normal? Yes >> go to 4.
No >> repair harness or connector.
4.Check intake door motor PBR feedback signal circuit for open
Check continuity between intake door motor harness connector and a/c auto amp. Harness connector.
Is the inspection result normal? Yes >> go to 5.
No >> repair harness or connector.
5.Check intake door motor PBR feedback signal circuit for short
Check continuity between intake door motor harness connector and ground.
Is the inspection result normal? Yes >> go to 6.
No >> repair harness or connector.
6.Check intake door motor PBR
Check intake door motor pbr. Refer to hac-81, "component inspection (pbr)".
Is the inspection result normal? Yes >> replace a/c auto amp. Refer to hac-105, "removal and installation".
No >> replace intake door motor. Refer to hac-112, "intake door motor : removal and installation".
7.Check intake door motor pbr power supply circuit for open
Is the inspection result normal? Yes >> replace a/c auto amp. Refer to hac-105, "removal and installation".
No >> repair harness or connector.
8.Check intake door motor drive signal circuit for open
Is the inspection result normal? Yes >> go to 9.
No >> repair harness or connector.
9.Check intake door motor drive signal circuit for short
Check continuity between intake door motor harness connector and ground.
Is the inspection result normal? Yes >> go to 10.
No >> repair harness or connector.
10.Check intake door motor
Is the inspection result normal? YES >> GO TO 11.
NO >> Replace intake door motor. Refer to HAC-112, "INTAKE DOOR MOTOR : Removal and Installation".
11.Check installation of intake door motor system
Check intake door motor system is properly installed. Refer to HAC-111, "Exploded View".
Is the inspection result normal? YES >> Replace A/C auto amp. Refer to HAC-105, "Removal and Installation".
NO >> Repair or replace malfunctioning parts.
Component Inspection (PBR)
1.Check intake door motor PBR
Check resistance between intake door motor terminals.
Is the inspection result normal? YES >> Inspection End.
NO >> Replace intake door motor. Refer to HAC-112, "INTAKE DOOR MOTOR : Removal and Installation".
Component Inspection (Motor)
1.Check intake door motor
Supply intake door motor terminals with battery voltage and check by visually and operation sound that intake door motor operates.
Is the inspection result normal? Yes >> inspection end.
No >> replace intake door motor. Refer to hac-112, "intake door motor : removal and installation".
Spark plugs
Replacing spark plugs
WARNINGBe sure the engine and ignition switch are
off and that the parking brake is engaged
securely.
CAUTION
Be sure to use the correct socket to remove
the spark plugs. An incorrect socket
can damage the spark plugs.
Platinum-tipped spark plugs (ex ...
Seat belt maintenance
To clean the seat belt webbing, apply a
mild soap solution or any solution recommended
for cleaning upholstery or carpet.
Then wipe with a cloth and allow the seat
belts to dry in the shade. Do not allow the
seat belts to retract until they are completely
dry.
If dirt builds up in t ...
Control Units and Electrical Parts
PRECAUTIONS
Never reverse polarity of battery terminals.
Install only parts specified for a vehicle.
Before replacing the control unit, check the input and output and
functions of the component parts.
Do not apply excessive force when disconnecting a connector.
Do not apply exce ...