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 independent). In CAN communication, control units are connected with 2 communication lines (CAN-H and CAN-L) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.
DTC Logic
DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE
NOTE: Immediately after performing any "DTC CONFIRMATION PROCEDURE", always turn ignition switch OFF.
Then wait at least 10 seconds before performing the next test.
1.CHECK DTC DETECTION
With CONSULT
With GST
Follow the procedure "With CONSULT".
Diagnosis Procedure
1.CHECK CAN COMMUNICATION CIRCUIT
With CONSULT
U0100 lost communication (ECM A)
U1010 control unit (CAN)Front door switch (driver side)
Description
Detects front door LH open/close condition.
Component Function Check
1. CHECK FUNCTION
Select "DOOR SW-FL" in "DATA MONITOR" mode with CONSULT.
Check the front door switch signal under the following conditions
Diagnosis Procedure
1. CHECK FRONT DOOR SWITCH LH CIRCUIT
...
P0031, P0032, P0051, P0052 A/F sensor 1 heater
Description
SYSTEM DESCRIPTION
The ECM performs ON/OFF duty control of the A/F sensor 1 heater corresponding
to the engine operating
condition to keep the temperature of A/F sensor 1 element within the specified
range.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PR ...
B1081 - B1084 seat belt pre-tensioner RH
Description
DTC B1081 - B1084 SEAT BELT PRE-TENSIONER RH
The seat belt pre-tensioner RH is wired to the air bag diagnosis sensor unit.
The air bag diagnosis sensor unitwill monitor for opens and shorts in
detected lines to the seat belt pre-tensioner RH.
PART LOCATION
DTC Logic
DTC DETECTIO ...