CLIMATE CONTROL UNIT INSPECTION [MANUAL AIR CONDITIONER]
1. Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)
2. Remove the following parts:a. Selector lever knob (AT) (See AUTOMATIC TRANSMISSION SHIFT MECHANISM REMOVAL/INSTALLATION.)b. Shift lever knob (MT)c. Shift panel component (See SHIFT PANEL REMOVAL/INSTALLATION.)d. Upper panel (See UPPER PANEL REMOVAL/INSTALLATION.)e. Parking brake lever boot panel (See PARKING BRAKE LEVER BOOT PANEL REMOVAL/INSTALLATION.)f. Rear console (See REAR CONSOLE REMOVAL/INSTALLATION.)g. Front console panel (See FRONT CONSOLE PANEL REMOVAL/INSTALLATION.)h. Front console component (See FRONT CONSOLE REMOVAL/INSTALLATION.)i. Scuff plate (See SCUFF PLATE REMOVAL/INSTALLATION.)j. Front side trim (See FRONT SIDE TRIM REMOVAL/INSTALLATION.)k. A-pillar trim (See A-PILLAR TRIM REMOVAL/INSTALLATION.)l. Hood release lever (See HOOD RELEASE LEVER AND RELEASE CABLE REMOVAL/INSTALLATION.)m. Driver-side lower panel (See DRIVER-SIDE LOWER PANEL REMOVAL/INSTALLATION.)n. Passenger-side lower panel (See PASSENGER-SIDE LOWER PANEL REMOVAL/INSTALLATION.)o. Center panel No.1 (See CENTER PANEL No.1 REMOVAL/INSTALLATION.)
3. Remove the climate control unit with the connector connected. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER].)
4. Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)
5. Switch the ignition ON (engine off or on).
6. Connect the negative (-) lead of the tester to the body ground.
7. Insert the positive (+) lead of the tester into each climate control unit terminal and measure the voltage according to the terminal voltage table.
If there is any malfunction, inspect the parts under “Inspection item (s)”.
If the parts under “Inspection item (s)” are found to be normal (except for terminal Q), replace the climate control unit. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER].)
For terminal Q, first try replacing the blower fan controller. If there is still any malfunction, replace the climate control unit. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER].)
| Terminal |
Signal name |
Connected to |
Measurement condition |
Voltage (V) |
Inspection item (s) |
|
| A |
— |
— |
— |
— |
— |
|
| B |
MS_CAN_L |
CAN related module |
Because this terminal is for communication, integrity determination by terminal voltage is not possible. |
|
||
| C |
GND |
Body ground |
Under any condition |
1.0 or less |
|
|
| D |
MS_CAN_H |
CAN related module |
Because this terminal is for communication, integrity determination by terminal voltage is not possible. |
|
||
| E |
Sensor GND |
|
Under any condition |
1.0 or less |
|
|
| F |
— |
— |
— |
— |
— |
|
| G |
Potentiometer input |
Air mix actuator |
Set temperature at HOT |
0.5 or more |
|
|
| Set temperature at COLD |
4.47 or less |
|||||
| H |
+5V |
|
Under any condition |
5 |
|
|
| I |
Potentiometer input |
Airflow mode actuator |
VENT |
0.5 or less |
|
|
| BI-LEVEL |
1.47 |
|||||
| HEAT |
2.47 |
|||||
| HEAT/DEF |
3.48 |
|||||
| DEFROSTER |
4.47 or more |
|||||
| J |
Evaporator temperature sensor input |
Evaporator temperature sensor |
Compared with temperature detected by evaporator temperature sensor |
Refer to graph 1 |
|
|
| K |
— |
— |
— |
— |
— |
|
| L |
B+ |
|
Under any condition |
B+ |
|
|
| M |
— |
— |
— |
— |
— |
|
| N |
IG1 |
Ignition relay |
Switch the ignition ON (engine off or on) |
B+ |
|
|
| Switch the ignition off |
1.0 or less |
|||||
| O |
— |
— |
— |
— |
— |
|
| P |
— |
— |
— |
— |
— |
|
| Q |
Blower fan speed control |
Blower fan controller |
Fan stopped (Switch the ignition ON (engine off or on)) |
13.61 |
|
|
| Fan: manual 1st |
10.48 |
|||||
| Fan: manual 3rd |
8.25 |
|||||
| Fan: manual 7th |
2.5 |
|||||
| R |
— |
— |
— |
— |
— |
|
| S |
Motor operation (RECIRCULATE) |
Air intake actuator |
Moving towards RECIRCULATE |
B+ |
|
|
| Moving towards FRESH |
1.0 or less |
|||||
| T |
Motor operation (VENT) |
Airflow mode actuator |
Moving towards VENT |
B+ |
|
|
| Moving towards DEFROSTER |
1.0 or less |
|||||
| U |
Motor operation (FRESH) |
Air intake actuator |
Moving towards RECIRCULATE |
1.0 or less |
|
|
| Moving towards FRESH |
B+ |
|||||
| V |
Motor operation (DEFROSTER) |
Airflow mode actuator |
Moving towards DEFROSTER |
B+ |
|
|
| Moving towards VENT |
1.0 or less |
|||||
| W |
Motor operation (COLD) |
Air mix actuator |
Moving towards HOT |
1.0 or less |
|
|
| Moving towards COLD |
B+ |
|||||
| X |
Motor operation (HOT) |
Air mix actuator |
Moving towards HOT |
B+ |
|
|
| Moving towards COLD |
1.0 or less |
|||||
| |
— |
