| Last Modified: 01-30-2024 | 6.11:8.1.0 | Doc ID: RM100000001RV73 |
| Model Year Start: 2021 | Model: RAV4 HV | Prod Date Range: [08/2020 - ] |
| Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): B1498; Communication Malfunction (A/C Inverter Local); 2021 - 2024 MY RAV4 HV [08/2020 - ] | ||
|
DTC |
B1498 |
Communication Malfunction (A/C Inverter Local) |
DESCRIPTION
The hybrid vehicle control ECU assembly and compressor with motor assembly communicate via a direct line. Compressor control is stopped and this DTC is stored if communication information is cut off or abnormal information occurs.
This DTC is also detected if high-voltage power supplied from the inverter with converter assembly to the compressor control circuit is shut off.
This DTC will be stored as a history DTC.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
Memory |
|---|---|---|---|---|
|
B1498 |
Communication Malfunction (A/C Inverter Local) |
|
|
Memorized |
WIRING DIAGRAM
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:
- Inspect the fuses for circuits related to this system before performing the following procedure.
-
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.
- Depending on the timing of the power supply to the 12 V power supply circuit and high-voltage circuit when the ignition switch is turned to ON (READY), an abnormal information signal may be output, causing this DTC to be stored. If the output DTC is a code that was memorized in the past, check the fuses and wire harnesses. If there is no malfunction, clear the DTC.
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. |
CHECK FOR DTC (HYBRID CONTROL SYSTEM) |
(a) Check if hybrid control system DTCs are output.
-
for AWD:
-
for LITHIUM-ION BATTERY:
Powertrain > Hybrid Control > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
DTCs are output |
B |
| B |
|
GO TO HYBRID CONTROL SYSTEM
|
|
|
3. |
CHECK HARNESS AND CONNECTOR (COMPRESSOR WITH MOTOR ASSEMBLY - HYBRID VEHICLE CONTROL ECU ASSEMBLY) |
(a) Disconnect the C52 compressor with motor assembly connector.
(b) Disconnect the A29 hybrid vehicle control ECU assembly connector.
(c) Disconnect the Q14 battery state sensor assembly connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
C52-3 (DOUT) - A29-8 (LIN3) |
Always |
Below 1 Ω |
|
C52-3 (DOUT) - A29-8 (LIN3) - Other terminals and body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
CHECK HARNESS AND CONNECTOR (COMPRESSOR WITH MOTOR ASSEMBLY - BATTERY AND BODY GROUND) |
CAUTION:
Do not disconnect the connector on the high-voltage side.
|
(a) Disconnect the compressor with motor assembly connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
C52-2 (GND) - Body ground |
Always |
Below 1 Ω |
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
C52-1 (IG1) - Body ground |
Ignition switch ON |
11 to 14 V |
|
Ignition switch off |
Below 1 V |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
5. |
INSPECT HV AIR CONDITIONING WIRE |
CAUTION:
Be sure to wear insulated gloves.
(a) Remove the HV air conditioning wire.
Click here
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
Z1-2 (PB) - Z2-1 (ACPB) |
Always |
Below 1 Ω |
|
Z1-1 (PE) - Z2-2 (ACPE) |
Always |
Below 1 Ω |
|
Z1-2 (PB) - Other terminals and body ground |
Always |
10 kΩ or higher |
| OK |
|
REPLACE COMPRESSOR WITH MOTOR ASSEMBLY
|
| NG |
|
REPLACE HV AIR CONDITIONING WIRE
|
|
|