DIAGNOSIS SYSTEM
1. DESCRIPTION
(a) Air conditioning system data and the Diagnostic Trouble Codes (DTCs) can be read through the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the Techstream to check for malfunctions and perform troubleshooting.
2. CHECK DLC3
(a) Check the DLC3 (See page ).
3. LIST OF OPERATION METHODS
(a) By operating each of the air conditioning control switches as shown in the diagram below, it is possible to enter diagnostic check mode.
4. INDICATOR CHECK
(a) Turn the ignition switch off.
(b) Turn the ignition switch to ON while pressing the air conditioning panel "AUTO" switch and "Recirculation/Fresh" switch simultaneously. Hold both switches until the indicator check screen appears.
Text in Illustration
*a |
Example |
(c) The indicator check is automatically performed when panel diagnosis is activated. Check that the indicators light up and go off 4 times at 1 second intervals continuously.
Text in Illustration
*a |
Example |
*b |
State of indicator check |
*c |
On |
*d |
Off |
*e |
1 second |
- |
- |
HINT:
5. SENSOR CHECK (DTC CHECK)
(a) Start the engine and warm it up.
(b) Perform the indicator check.
HINT:
After the indicator check is completed, the system enters DTC check mode automatically.
(c) Read the DTCs displayed on the display.
Text in Illustration
*a |
Example |
*b |
DTC |
NOTICE:
In sensor check mode, which is automatically entered after indicator check mode, troubleshooting may be partially performed. Be sure to perform the sensor check again.
HINT:
Refer to Diagnostic Trouble Code Chart for details of the codes (See page ).
(d) If the steps are difficult to read because they change automatically, press the "driver side TEMP UP" switch to display the steps one at a time so that they can be read easily. The items are displayed step by step each time the "driver side TEMP UP" switch is pressed.
HINT:
Press the "OFF" switch to finish panel diagnosis.
6. SENSOR CHECK (CLEAR DTC)
(a) During the sensor check, press the "Mirror Heater" switch and "Rear DEF" switch simultaneously.
Text in Illustration
*a |
Example |
Open or Short in Front Speed Sensor RH Circuit (C1405,C1406)
DESCRIPTION
Refer to DTCs C1401 and C1402 (See page ).
DTC No.
Detection Item
DTC Detection Condition
Trouble Area
C1405
Open or Short in Front Speed Sensor RH Circuit
Either of the following is detected:
...
Front Differential Oil Temperature Sensor Circuit Low (P17C7)
DESCRIPTION
This DTC is output when a short to ground in the oil temperature sensor is detected.
DTC No.
Detection Item
DTC Detection Condition
Trouble Area
P17C7
Front Differential Oil Temperature Sensor Circuit Low
...
Removal
REMOVAL
PROCEDURE
1. PRECAUTION
NOTICE:
After turning the ignition switch off, waiting time may be required before disconnecting
the cable from the negative (-) battery terminal. Therefore, make sure to read the
disconnecting the cable from the negative (-) battery terminal notices before pr ...