Headlight Signal Circuit

HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Manual Air Conditioning System): HOW TO PROCEED WITH TROUBLESHOOTING

HOW TO PROCEED WITH TROUBLESHOOTING
HINT:
- Use the following procedure to troubleshoot the air conditioning system.
- *: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP
NEXT -- Continue to next step.

2. INSPECT BATTERY VOLTAGE
(a) Inspect the battery voltage.
Standard voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the battery before proceeding.
NEXT -- Continue to next step.

3. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*
(a) Use the Techstream to check if the CAN communication system is functioning normally.
Result:






B -- Go to CAN COMMUNICATION SYSTEM
A -- Continue to next step.

4. CHECK FOR DTC*
(a) Check for DTCs and note any codes that are output.
HINT: Refer to DTC Check / Clear Reading and Clearing Diagnostic Trouble Codes.
(b) Clear the DTCs.
(c) Recheck for DTCs. Based on the DTCs output above, try to force the A/C system to output DTCs by simulating the conditions indicated by the DTC.
Result:






B -- Go to step 7
A -- Continue to next step.

5. PROBLEM SYMPTOMS TABLE
(a) Refer to Problem Symptoms Table Symptom Related Diagnostic Procedures.
Result:






B -- Go to step 7
A -- Continue to next step.

6. OVERALL ANALYSIS AND TROUBLESHOOTING*
(a) Data List / Active Test Scan Tool Testing and Procedures
(b) Terminals of ECU Pinout Values and Diagnostic Parameters
(c) On-Vehicle Inspection
(d) Inspection
NEXT -- Continue to next step.

7. ADJUST, REPAIR OR REPLACE
NEXT -- END