Description
CAN (Controller Area Network) is a serial communication line for real-time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent malfunction detection ability.
Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independently). In CAN communication, control units are connected with 2 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.
DTC Description
CAN (Controller Area Network) is a serial communication line for real-time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent malfunction detection ability.
Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independently). In CAN communication, control units are connected with 2 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.
DTC DETECTION LOGIC
DTC | CONSULT screen terms (Trouble diagnosis content) | DTC detection condition |
U1000 | CAN COMM CIRCUIT (CAN Communication Line) | When the ignition switch is ON, TCM cannot send the CAN communication signal continuously for 2 seconds or more. |
POSSIBLE CAUSE
Harness or connector (CAN communication line is open or shorted)
FAIL-SAFE
Not changed from normal driving
DTC CONFIRMATION PROCEDURE
1.PREPARATION BEFORE WORK
If another “DTC CONFIRMATION PROCEDURE” occurs just before, turn ignition switch OFF and wait for at least 10 seconds, then perform the next test.
>> GO TO 2.
2.CHECK DTC DETECTION
With CONSULT
Is “U1000” detected? YES >> Go to TM-102, "Diagnosis Procedure".
NO-1 >> To check malfunction symptom before repair: Refer to GI-41, "Intermittent Incident".
NO-2 >> Confirmation after repair: INSPECTION END
Diagnosis Procedure
For the diagnosis procedure, refer to LAN-17, "Trouble Diagnosis Flow Chart".
Body component parts
Underbody Component Parts
Both sided anti-corrosive
precoated steel portions
High strength steel (HSS)
portions: 440 MPa
Both sided anti-corrosive
steel and HSS portions: 440 MPa
CAUTION:
If the high strength steel (ultra high strength steel) of this is broken,
replace by assem ...
Preparation
Commercial Service Tool
Tool name
Description
Brake drum clearance gauge
Measuring rear rotor drum inner diamete
Power tool
Loosening nuts, screws and bolts
...
Power supply and ground circuit
WITH INTELLIGENT KEY SYSTEM
WITH INTELLIGENT KEY SYSTEM : Diagnosis Procedure
Regarding Wiring Diagram information, refer to BCS-50, "Wiring Diagram".
1. CHECK FUSE
Check that the following fuse is not blown.
Terminal No.
Signal name
Fuse No.
161
BCM power sup ...