Automatic Air Conditioning System

AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System):

HOW TO PROCEED WITH TROUBLESHOOTING

HINT:
- Use these procedures to troubleshoot the air conditioning system.
- *: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP
NEXT -- Continue to next step.
2. INSPECT 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 (DTC Check / Clear).
(b) Clear the DTC (DTC Check / Clear).
(c) Recheck for DTCs. Based on the DTCs output above, try to force output of the air conditioning system DTC by simulating the operation indicated by the DTC.

Result





B -- GO TO STEP 7
A -- Continue to next step.
5. PROBLEM SYMPTOMS TABLE
(a) Refer to the problem symptoms table (Automatic Air Conditioning System).

Result





B -- GO TO STEP 7
A -- Continue to next step.
6. OVERALL ANALYSIS AND TROUBLESHOOTING*
(a) Actuator Check (Actuator Check)

(b) DATA LIST / ACTIVE TEST (Automatic Air Conditioning System)

(c) Terminals of ECU (Automatic Air Conditioning System)

(d) On-vehicle Inspection
(e) Inspection
NEXT -- Continue to next step.
7. ADJUST, REPAIR OR REPLACE
NEXT -- END