Reading and Clearing Diagnostic Trouble Codes

Diagnosis Procedure




SELECTING CAN SYSTEM TYPE (HOW TO USE SPECIFICATION TABLE)

ACQUISITION OF DATA BY CONSULT-II




Attach the data acquired by CONSULT-II on the check sheet determined according to CAN system type.(For display control unit, transfer the data from the LCD monitor screen of the vehicle to the CAN diagnosis support monitor check sheet "CAN Communication Line Check".)

HOW TO USE CHECK SHEET TABLE

How To Use Check Sheet Table:

1. Unit names displayed on CONSULT-II
2. "No indication" : Put a check mark to it if the unit name described in step 1 is not displayed on "SELECT SYSTEM" screen of CONSULT-II. (Unit communicating with CONSULT-II via CAN communication line)
"-" : Column not used (Unit communicating with CONSULT-II excluding CAN communication line)

3. "NG" : Display "NG" when malfunction is detected in the initial diagnosis of the diagnosed unit. Replace the unit if "NG" is displayed.
"-" : Column not used (Initial diagnosis is not performed.)

4. "UNKWN" : Display "UNKWN" when the diagnosed unit does not transmit the data normally. Put a check mark to it if "UNKWN" is displayed on CONSULT-II.
5. "UNKWN" : Display "UNKWN" when the diagnosed unit does not receive the data normally. Put a check mark to it if "UNKWN" is displayed on CONSULT-II.
"-" : Column not used (It is not necessary for CAN communication trouble diagnosis.)

NOTE:
CAN communication diagnosis checks if CAN communication works normally. (Contents of data are not diagnosed.)
- Refer to "Example of Filling in Check Sheet When Initial Conditions Are Reproduced" when the initial conditions are reproduced.
- Refer to "Example of Filling in Check Sheet When Initial Conditions Are Not Reproduced" when the initial conditions are not reproduced.

Example of Filling in Check Sheet When Initial Conditions Are Reproduced




1. Put a check mark to "No indication" if some of unit names listed on the column of diagnosis system selection screen of a check sheet table are not displayed on "SELECT SYSTEM" screen attached to the check sheet.

NOTE: Put a check mark to "No indication" of IPDM E/R because IPDM E/R is not displayed on "SELECT SYSTEM" screen.

2. Confirm the unit name that "UNKWN" is displayed from the copy of "CAN DIAG SUPPORT MNTR" screen of "ENGINE" attached to the check sheet, and then put a check mark to the check sheet table.

NOTE: In "CAN DIAG SUPPORT MNTR" screen, "UNKWN" is displayed on "VDC/TCS/ABS", "ICC", "IPDM E/R" and "AWD/4WD/e4WD". But put a check mark to "VDC/TCS/ABS" and "IPDM E/R" because "UNKWN" is listed on the column of reception diagnosis of the check sheet table.

3. Confirm the unit name that "UNKWN" is displayed on the copy of "CAN DIAG SUPPORT MNTR" screen of "TRANSMISSION" as well as "ENGINE". And then, put a check mark to the check sheet table.

NOTE:
- For "TRANSMISSION", "UNKWN" is displayed on "VDC/TCS/ABS". Put a check mark to it.




4. Display control unit reads the CAN diagnosis support monitor check sheet (B), "CAN Communication Line Check" transferred from the LCD monitor screen(A). The transferred CAN diagnosis support monitor check sheet is copied to the Check sheet, and conversed according to the Display control unit Translation Sheet. And then put a check mark to the check sheet table.

NOTE: In the CAN diagnosis support monitor check sheet (B), check marks are put to "CAN CIRC 4", "CAN CIRC 6", "CAN CIRC 7", "CAN CIRC 8" and "CAN CIRC 9". But, in the column of the check sheet table indication in Display control unit Translation Sheet (C), "IPDM E/R" is listed only for "CAN CIRC 7". Therefore, put a check mark to "IPDM E/R" because "UNKWN" is listed on the column of reception diagnosis of the check sheet table.




5. Confirm the unit name that "UNKWN" is displayed on the copy of "CAN DIAG SUPPORT MNTR" screen of "BCM" and "ABS" as well as "ENGINE". And then, put a check mark to the check sheet table.

NOTE:
- For "BCM", "UNKWN" is displayed on "IPDM E/R". Put a check mark to it.
- For "ABS", "UNKWN" is displayed on "ECM" and "TCM". Put a check mark to it.

NOTE: There is a check mark in VDC/TCS/ABS of "A/T" in "The arranged results of CAN diagnosis support monitor" sheet. Also, there is a mark of "-" both in VDC/TCS/ABS of "A/T" in the check sheet results (example). Therefore, neglect a check mark both in VDC/TCS/ABS of "A/T" in "The arranged results of CAN diagnosis support monitor" sheet.




6. Perform system diagnosis for possible causes identified.
7. Perform diagnosis again after inspection and repair. Make sure that repair is completely performed, and then end the procedure.

Start CAN system trouble diagnosis if this procedure can be confirmed. Refer "CAN Communication Unit"

Example of Filling in Check Sheet When Initial Conditions Are Not Reproduced




1. See "SELF-DIAG RESULTS" of all units attached to the check sheet. If "CAN COMM CIRCUIT", "CAN COMM CIRCUIT [U1000]" or "CAN COMM CIRCUIT [U1001]" is displayed, put a check mark to the applicable column of self-diagnostic results of the check sheet table.

NOTE:
- For "ENGINE", "CAN COMM CIRCUIT [U1001]" are displayed. Put a check mark to it.
- For "BCM", "NO DTC IS DETECTED" is displayed. Do not put a check mark to it.
- For "ABS", "NO DTC IS DETECTED" is displayed. Do not put a check mark to it.
- For "IPDM E/R", "CAN COMM CIRCUIT [U1000]" is displayed. Put a check mark to it.

NOTE: There is a case that some of "CAN DIAG SUPPORT MNTR" and "SELF-DIAG RESULTS" are not needed for diagnosis. In the case, "UNKWN" and "CAN COMM CIRCUIT(U1000)" in "Check sheet results (example)" change to "-". Then, ignore check marks on the Check sheet table.




2. For the selected possible causes, it is expected that malfunctions have been found in the past.