Flow of Diagnosis

DIAGNOSTIC TROUBLESHOOTING FLOW

NOTE
Before carrying out diagnostic troubleshooting, check to be sure that all of the following are normal.
1. Is the refrigerant level appropriate?
2. Is the tension of the A/C compressor drive belt at the standard value?
3. Are the air ducts and rods secure in their positions?
4. Are the damper motor and rods correctly connected?
5. Are any fuses blown?

DIAGNOSTIC FUNCTION
METHOD OF READING THE DIAGNOSTIC TROUBLE CODES




When Using The Scan Tool
Connect the scan tool to the diagnostic connector under the instrument under cover.




When Using The Voltmeter
Use the special tool to connect a voltmeter between the ground terminal and the diagnostic output terminal of data link connector.
Read the diagnostic trouble code by the indicator's deflection




DIAGNOSTIC RESULT DISPLAY METHOD WHEN USING THE VOLTMETER

NOTE: Other on-board diagnostic items are also output as voltage waveforms corresponding to diagnostic trouble code numbers.

METHOD OF ERASING THE DIAGNOSTIC TROUBLE CODES
The diagnostic trouble codes can be erased by disconnecting the (-) cable from the battery for 10 seconds or more and then re-connecting it.




INSPECTION CHART FOR DIAGNOSTIC TROUBLE CODES























































INSPECTION PROCEDURES FOR DIAGNOSTIC TROUBLE CODES

INSPECTION CHART FOR TROUBLE SYMPTOMS

INSPECTION PROCEDURE FOR DIAGNOSTIC TROUBLE SYMPTOMS




Inspection procedure 1

Inspection procedure 2

Inspection procedure 3

Inspection procedure 4

Inspection procedure 5

Inspection procedure 6

Inspection procedure 7

Inspection procedure 8

Inspection procedure 9

Inspection procedure 10

Inspection procedure 11

Inspection procedure 12

Inspection procedure 13

Inspection procedure 14

Inspection procedure 15

Inspection procedure 16

Inspection procedure 17

Inspection procedure 18




DATA LIST REFERENCE TABLE










INSPECTION AT THE A/C-ECU TERMINALS