Operational Check (Rear)

Operational Check (Rear)
The purpose of the operational check is to confirm that the system operates properly.

Conditions : Engine running and at normal operating temperature

CHECKING REAR BLOWER MOTOR
1. Turn the ignition switch ON.
2. Rotate rear air control (front) blower control dial to low speed.
3. Rotate the blower control dial clockwise and continue checking blower speed until all speeds are checked.
4. Leave blower on maximum speed.
5. Press the REAR CTRL switch from the rear air control (front).
6. Rotate rear air control (rear) blower control dial to low speed.
7. Rotate the blower control dial clockwise and continue checking blower speed until all speeds are checked.
8. Leave blower on maximum speed.

If NG, go to trouble diagnosis procedure for HAC-56, "Rear Blower motor Component Function Check". Blower Motor Control System
If OK, continue with next check.

CHECKING REAR DISCHARGE AIR




1. The REAR CTRL indicator must be off. Press each rear air control (front) mode door switches and confirm the discharge air comes out relative to the icon on each switch and according to the air distribution table. Refer to HAC-15, "Discharge Air Flow (Rear)". Automatic Air Conditioner System
2. Press the REAR CTRL switch (indicator on) from the rear air control (front).
3. Press each rear air control (rear) mode door switches and confirm the discharge air comes out relative to the icon on each switch and according to the air distribution table. Refer to HAC-15, "Discharge Air Flow (Rear)". Automatic Air Conditioner System

Air mix door position is checked in the next step.
If NG, go to HAC-31, "Air Mix Door Motor Component Function Check". Air Mix Door Motor
If OK, continue with next check.

CHECKING REAR TEMPERATURE DECREASE
1. Press the REAR CTRL switch (indicator off).
2. Rotate the rear air control (front) temperature control dial counterclockwise to maximum cold.
3. Check for cold air at appropriate discharge air outlets.
4. Press the REAR CTRL switch (indicator on) from the rear air control (front).
5. Rotate the rear air control (rear) temperature control dial counterclockwise to maximum cold.
6. Check for cold air at appropriate discharge air outlets.

If NG, listen for sound of air mix door motor operation. If OK, go to trouble diagnosis procedure for HAC-31, "Air Mix Door Motor Component Function Check". Air Mix Door Motor If air mix door motor appears to be malfunctioning, go to HAC-62, "Air Mix Door Motor (Rear) Diagnosis Procedure". Air Mix Door Motor
If OK, continue with next check.

CHECKING REAR TEMPERATURE INCREASE
1. Press the REAR CTRL switch (indicator off).
2. Rotate the rear air control (front) temperature control dial clockwise to maximum heat.
3. Check for hot air at appropriate discharge air outlets.
4. Press the REAR CTRL switch (indictor on) from the rear air control (front).
5. Rotate the rear air control (rear) temperature control dial clockwise to maximum heat.
6. Check for hot air at appropriate discharge air outlets.

If NG, listen for sound of air mix door motor operation. If OK, go to trouble diagnosis procedure for HAC-31, "Air Mix Door Motor Component Function Check". Air Mix Door Motor If air mix door motor appears to be malfunctioning, go to HAC-62, "Air Mix Door Motor (Rear) Diagnosis Procedure". Rear Air Control System

If NG, go to trouble diagnosis procedure for HAC-117, "Component Function Check". Insufficient Heating
If all operational checks are OK (symptom cannot be duplicated), go to HAC-3, "How to Perform Trouble Diagnosis For Quick And Accurate Repair" Diagnosis and Repair Workflow and perform tests as outlined. If symptom appears, refer to HAC-108, "Symptom Matrix Chart" Symptom Matrix Chartand perform applicable trouble diagnosis procedures.