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 into vehicles, and each control unit shares information and links with other control units during operation. With 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 and receives data but selectively reads required data only. Refer to LAN-32, "CAN COMMUNICATION SYSTEM : CAN Communication Signal Chart".
DTC Logic
DTC DETECTION LOGIC
CONSULT name |
DTC |
DTC detecting condition |
Repair order |
CAN COMMUNICATION FAILURE | U1000 | When air bag diagnosis sensor unit is not transmitting or receiving CAN communication signals for 2 or more seconds. | Refer to SRC-95, "Diagnosis Procedure". |
DTC CONFIRMATION PROCEDURE
1.PERFORM SELF-DIAGNOSIS
Is DTC detected? YES >> Refer to SRC-95, "Diagnosis Procedure".
NO >> Refer to GI-41, "Intermittent Incident".
Diagnosis Procedure
1.CHECK CAN COMMUNICATION SYSTEM
Check CAN communication system. Refer to LAN-17, "Trouble Diagnosis Flow Chart".
>> Inspection End.
Steering column
Inspection
HOLE COVER SEAL, HOLE COVER AND LOWER SHAFT
Check each part of hole cover seal, hole cover and steering column and lower
shaft for damage or other malfunctions.
Replace if necessary.
STEERING COLUMN
Check each part of steering column for damage or other
malfunctions. ...
Information display is malfunctioning
Diagnosis Procedure
1.CHECK DTC WITH ECM
Check that DTC is not displayed.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Perform trouble diagnosis relevant to DTC indicated.
2.CHECK INFORMATION DISPLAY (ASCD)
Refer to EC-475, "Component Function Check".
Is ...
C119A vacuum sensor
DTC Logic
DTC DETECTION LOGIC
DTC
Display Item
Malfunction detected condition
Possible causes
C119A
VACUUM SEN VOLT
When a malfunction is detected in supply power voltage
of vacuum sensor.
Harness or connector
Vacuum sensor (brake booster)
...