Honda HR-V: Rear Window Defogger System Description - Control/Function
The Timer Function (Without Climate Control)
The rear window defogger provides the timer control function that is
controlled by the HVAC control unit. The
timer control is operated by turning the vehicle to the ON mode, then turn on
the rear window defogger switch.
The timer operating time varies according to ambient temperature. If the rear
window defogger switch is turned
on when the timer is active, it toggles between ON and OFF every time the switch
is pressed.
Timer operation time is changed under the following conditions:
- When the evaporator temperature sensor detection is lower than 16 ºF
(-9 ºC), the timer operation
time is unlimited.
- When the evaporator temperature sensor detection is higher than 18 ºF
(-8 ºC), the timer operation
time is 20 minutes. But when it was lower than 16 ºF (-9 ºC) once, the
operation time is changed to unlimited.
- When the evaporator temperature sensor is failure, the timer operation
time is 20 minutes.
The Timer Function (With Climate Control)
The rear window defogger provides the timer control function that is
controlled by the climate control unit. The
timer control is operated by turning the vehicle to the ON mode, then turning on
the rear window defogger
switch. The timer operating time varies according to ambient temperature. If the
rear window defogger switch is
turned on when the timer is active, it toggles between ON and OFF every time the
switch is pressed.
![HVAC System - Testing & Troubleshooting](images/books/1097/index 72(14).png)
![HVAC System - Testing & Troubleshooting](images/books/1097/index 73(14).png)
REAR WINDOW DEFOGGER SYSTEM DESCRIPTION - OVERVIEW
All vehicles of this model come equipped with the rear window defogger. The
rear window defogger switch is
integrated into the climate control unit or heater control panel.
![HVAC System - Testing & Troubleshooting](images/books/1097/index 74(14).png)
![HVAC System - Testing & Troubleshooting](images/books/1097/index 75(14).png)
![HVAC System - Testing & Troubleshooting](images/books/1097/index 76(14).png)
REAR WINDOW DEFOGGER SYSTEM DESCRIPTION - SYSTEM DIAGRAM
With Climate Control
![HVAC System - Testing & Troubleshooting](images/books/1097/index 77(14).png)
DTC TROUBLESHOOTING INDEX
CLIMATE CONTROL SYSTEM DTC TROUBLESHOOTING INDEX
![HVAC System - Testing & Troubleshooting](images/books/1097/index 78(15).png)
![HVAC System - Testing & Troubleshooting](images/books/1097/index 79(14).png)
READ NEXT:
When a customer presents an A/C concern, do the following procedure to
identify the cause of the problem.
1. Confirm the type of concern.
If a customer complains about an A/C performance problem, g
Special Tools Required
Backprobe Set 07SAZ-
001000A
Test
SRS components are located near the mode control motor and the recirculation
control motor. Review the SRS
component locations - Refer to: SR
SEE MORE:
Removal & Installation
1. Shift Lever Knob - Remove
CVT Models
M/T Models
2. Center Console Switch Trim - Remove
Remove the center console switch trim (A)
Disconnect the connector (B).
3. Center Console Panel - Remove
Remove the center console panel (A)
Disconnect the connectors (B)
NOTE:
Refer to the DTC code shown on the display, and then inspect the
connectors and terminals based on the
instructions in the table below.
The DTC may be stored due to the grounding failure or the power source
failure at the transmitting
control unit (the grounding inspection and the pow