How To Proceed With Troubleshooting
HINT:
- Use these procedures to troubleshoot the air conditioning system.
- *: Use the Techstream.
VEHICLE BROUGHT TO WORKSHOP
|
CUSTOMER PROBLEM ANALYSIS AND SYMPTOM CHECK
|
INSPECT BATTERY VOLTAGE
(a) Measure the voltage of the battery.
Standard voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step.
|
CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*
(a) Use the Techstream to check if the CAN communication system is functioning normally.
Result | Proceed to |
|---|---|
CAN DTC is not output |
A |
CAN DTC is output |
B |
| B | .gif) | GO TO CAN COMMUNICATION SYSTEM |
|
CHECK PANEL DIAGNOSIS
(a) Check panel diagnosis (See page ).
(1) Indicator Check
(2) Sensor Check
|
CHECK FOR DTC*
(a) Check for DTCs and note any codes that are output (See page ).
(b) Clear the DTCs (See page ).
(c) Based on the DTCs output above, try to force output of the air conditioning system DTC by simulating the conditions indicated by the DTC. Then recheck for DTCs.
Result | Proceed to |
|---|---|
DTC is not output |
A |
DTC is output |
B |
| B | | GO TO DIAGNOSTIC TROUBLE CODE CHART |
|
PROBLEM SYMPTOMS TABLE
(a) Refer to Problem Symptoms Table (See page
).
Result | Proceed to |
|---|---|
Fault is not listed in problem symptoms table |
A |
Fault is listed in problem symptoms table |
B |
| B | | GO TO STEP 9 |
|
OVERALL ANALYSIS AND TROUBLESHOOTING*
(a) Terminals of ECU (See page
).
(b) Data List / Active Test (See page ).
(c) On-vehicle Inspection
(d) Inspection
|
ADJUST, REPAIR OR REPLACE
|
CONFIRMATION TEST
| NEXT | | END |
Test yourself
A quick Toyota 4Runner quiz: every answer comes with an explanation and a link to the manual page.