Honda HR-V: A/C Diagnostic Process
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, go to step 2.
- If a customer complains about an A/C noise problem, do the A/C system
noise check.
2. Do the A/C system inspection - Refer to: A/C System Inspection, or A/C
System Contamination
Inspection and repair any problems. If no problems are found, go to step 3.
3. Recover the refrigerant from the A/C system and measure the refrigerant
charge from the A/C system
using an R134a A/C automatic recovery, recycle, recharge machine that meets SAE
J2788 standards.
- If the refrigerant charge is within specifications, go to step 5.
- If the refrigerant charge is significantly under specifications, go to
step 4.
- If the refrigerant charge is significantly over specifications, go to
step 5.
4. Do the refrigerant leak check and repair any leaks. If no leaks are found,
go to step 5.
5. Evacuate and recharge the system and do the A/C system test.
A/C SYSTEM TEST
Special Tools Required
Big Digit Hygro-Thermometer PYR445703,
commercially available
Throttle Pedal Depressor Tool B240B,
commercially available
Test
- Air conditioning refrigerant or lubricant vapor can irritate your eyes,
nose, or throat.
- Be careful when connecting service equipment.
- Do not breathe refrigerant or vapor.
SRS components are located in this area. Review the SRS component locations -
Refer to: SRS Component
Location Index (KA/KC), or SRS Component Location Index (KA/KC) and the
precautions and
procedures before doing repairs or service.
The performance test will help determine if the A/C system is operating
within specifications.
NOTE:
- If accidental system discharge occurs, ventilate the work area before
resuming service.
- Additional health and safety information may be obtained from the
refrigerant and lubricant
manufacturers.
Performance Test
1. A/C System - Inspect
- Do the A/C system inspection - Refer to: A/C System Inspection, or A/C
System Contamination
Inspection, and correct any problems found.
2. R134a A/C Automatic Recovery, Recycle, Recharge Machine - Connect
Fig. 5: A/C Service Port Location
- Connect an R134a A/C automatic recovery, recycle, recharge machine to
the high-pressure service
port (A) and the low-pressure service port (B), as shown, following the
equipment manufacturer's
instructions.
3. Glove Box - Remove
4. A/C System - Test
- Determine the relative humidity and air temperature
- Insert a thermometer (A) in the dashboard center vent
- Place a hygro-thermometer (B) near the blower unit's recirculation inlet
duct
- Test conditions:
- The blower intake temperature must be at least 68 ºF (20 ºC).
- Move the vehicle out of direct sunlight and let it cool down to the
surrounding
(ambient) temperature. If necessary, wash the vehicle to cool it down
more quickly.
- Open the hood.
- Open the front doors.
- Apply the parking brake.
- Shift the transmission to P or N position/mode.
- Start the engine.
- Set the A/C system to the following items.
- A/C: ON
- Temperature control: MAX COOL
- Mode control: VENT
- Recirculation control: RECIRCULATE
- Fan control: Max
- Using the throttle pedal depressor tool to run the engine at a
steady 1, 500 RPM.
- No driver or passengers in vehicle.
- Inspect the A/C components for the following conditions:
- A/C compressor clutch not engaged.
- Abnormal frost areas.
- Unusual noises.
If you observe any of these conditions, refer to the Symptom
Troubleshooting Index
- After running the air conditioning for 10 minutes under the test
conditions, read the
delivery temperature from the thermometer in the center vent, the blower
intake temperature
near the blower unit, and the discharge (high) and suction (low) pressures
on the A/C
gauges.
- To complete the vent (delivery)/blower intake temperature chart:
- Mark the vent (delivery) temperature on the vertical line.
- Mark the blower intake temperature on the bottom line.
- Draw a vertical line from the blower intake temperature mark.
- Draw a horizontal line from the vent (delivery) temperature mark
until it intersects the vertical line.
NOTE: The vent (delivery) temperature and blower intake temperature should
intersect in the shaded
area. Any measurements outside the line may indicate the need for further
inspection.
- To complete the high side (discharge) pressure/blower intake temperature
chart:
- Mark the high side (discharge) pressure on the vertical line.
- Mark the blower intake temperature on the bottom line.
- Draw a vertical line from the blower intake temperature mark.
- Draw a horizontal line from the high side (discharge) pressure mark
until it intersects the vertical
line.
NOTE: The high side (discharge) pressure and blower intake temperature should
intersect in the shaded
area. Any measurements outside the line may indicate the need for further
inspection.
- To complete the low side (suction) pressure/blower intake temperature
chart:
- Mark the low side (suction) pressure along the vertical line.
- Mark the blower intake temperature along the bottom line.
- Draw a vertical line from the blower intake temperature mark.
- Draw a horizontal line from the low side (suction) pressure mark
until it intersects the vertical line.
NOTE: The low side (suction) pressure and blower intake temperature should
intersect in the shaded
area. Any measurements outside the line may indicate the need for further
inspection.
Pressure Test
5. A/C System Pressure - Test
READ NEXT:
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
Test
SRS components are located in this area. Review the SRS component locations -
Refer to: SRS Component
Location Index (KA/KC), or SRS Component Location Index (KA/KC) and the
precautions and
pro
Test
1. Heater Control Panel - Remove
2. Heater Fan Switch - Test
Check for continuity between the terminals in each
switch position according to the table.
If the continuity could not found bet
SEE MORE:
NOTE: Before you troubleshoot, review the general troubleshooting
information.
1. Problem verification:
Turn the vehicle to the ON mode.
Clear the DTC with the HDS.
Turn the vehicle to the OFF (LOCK) mode, then to the ON mode.
Check for DTCs with the HDS.
Is DTC 112-11 indicated?
YES
The fa
Use a damp cloth with a mixture of mild detergent and warm water to remove
dirt.
Use a clean cloth to remove detergent residue.
Do not spill liquids inside the vehicle.
Electrical devices and systems may malfunction if
liquids are splashed on them.
Do not use silicone based sprays on electrical