| Last Modified: 01-30-2024 | 6.11:8.1.0 | Doc ID: RM100000001RV72 |
| Model Year Start: 2021 | Model: RAV4 HV | Prod Date Range: [08/2020 - ] |
| Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): B1476; A/C Inverter Load System Malfunction; 2021 - 2024 MY RAV4 HV [08/2020 - ] | ||
|
DTC |
B1476 |
A/C Inverter Load System Malfunction |
DESCRIPTION
The operation of the compressor with motor assembly is stopped and this DTC is stored if the rotation load is too large or too small while the compressor with motor assembly is operating.
Possible causes are refrigerant leaks, overcharged refrigerant, insufficient cooling due to a condenser fan circuit malfunction, or compressor lock.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
Memory |
|---|---|---|---|---|
|
B1476 |
A/C Inverter Load System Malfunction |
|
|
Memorized |
CAUTION / NOTICE / HINT
CAUTION:
- Wear insulated gloves and pull out the service plug grip before inspection as procedures may require disconnecting high-voltage connectors. Carry the removed service plug in your pocket to prevent other technicians from accidentally reconnecting it while you are servicing the vehicle.
- Do not touch the high-voltage connectors or terminals for 10 minutes after the service plug grip is removed.
NOTICE:
-
After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.
-
for AWD:
![2019 - 2024 MY RAV4 HV [02/2019 - ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for AWD with NICKEL METAL HYDRIDE BATTERY): PRECAUTION](/t3Portal/stylegraphics/info.gif)
-
for LITHIUM-ION BATTERY:
-
for AWD:
- The hybrid control system and air conditioning system output DTCs separately. Perform troubleshooting for the hybrid control system first if DTCs from these systems are output simultaneously.
PROCEDURE
|
1. |
CHECK CAN COMMUNICATION SYSTEM |
(a) Using the Techstream, check if the CAN communication system is functioning normally.
Click here
|
Result |
Proceed to |
|---|---|
|
CAN communication system DTCs are not output |
A |
|
CAN communication system DTCs are output |
B |
| B |
|
|
|
2. |
PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE ENGINE COOLING FAN DUTY RATIO) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Active Test.
(e) Check the operation by referring to the table below.
Powertrain > Engine > Active Test
|
Tester Display |
Measurement Item |
Control Range |
Restrict Condition |
|---|---|---|---|
|
Control the Engine Cooling Fan Duty Ratio |
Electric cooling fan motor operation |
0 to 100 (%) |
Perform this test when vehicle is stopped. |
Powertrain > Engine > Active Test
|
Tester Display |
|---|
|
Control the Engine Cooling Fan Duty Ratio |
OK:
Electric cooling fan operates smoothly.
| NG |
|
|
|
3. |
CHECK REFRIGERANT PRESSURE |
(a) Install a manifold gauge set.
Click here
(b) Turn the ignition switch to ON (READY).
(c) Read the manifold gauge pressure when the following conditions are met.
(1) Prepare the vehicle according to the table below.
Measurement Condition:
|
Item |
Condition |
|---|---|
|
Vehicle Condition |
Ignition switch ON (READY) |
|
Doors |
Fully closed (windows also fully closed) |
|
A/C Switch |
On |
|
Recirculation/fresh Control Switch |
Recirculation |
|
Set Temperature |
MAX COLD |
|
Blower Speed |
HI |
|
Air Conditioning Air Inlet Temperature |
25 to 35°C (77 to 95°F) |
Standard Pressure:
Low pressure side
150 to 250 kPa (1.5 to 2.5 kgf/cm2, 22 to 36 psi)
High pressure side
1370 to 1570 kPa (14 to 16 kgf/cm2, 199 to 228 psi)
| OK |
|
REPLACE COMPRESSOR WITH MOTOR ASSEMBLY
|
| NG |
|
|
|