Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000026Z43
Model Year Start: 2023 Model: Corolla Prod Date Range: [09/2022 -           ]
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): B149887; A/C Inverter Local Missing Message; 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]

DTC

B149887

A/C Inverter Local Missing Message

DESCRIPTION

The hybrid vehicle control ECU 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.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Memory

B149887

A/C Inverter Local Missing Message

Diagnosis Condition:

  • Ignition switch ON (READY)

Malfunction:

  • Error or open in communication line between the hybrid vehicle control ECU and compressor with motor assembly
  • High-voltage power source shut off

Detection Time:

  • -
  • Harness or connector
  • HV air conditioning wire
  • Compressor with motor assembly
  • Hybrid vehicle control ECU
  • Battery state sensor assembly

Memorized

DTC Detection Condition Combination Table

 

Vehicle Condition

Pattern 1

Pattern 2

Pattern 3

Diagnosis Condition

Ignition switch ON (READY)

Malfunction

Error in communication line between the hybrid vehicle control ECU and compressor with motor assembly

-

-

Open in communication line between the hybrid vehicle control ECU and compressor with motor assembly

-

-

High-voltage power source shut off

-

-

Detection Time

-

-

-

Trip Count

1 trip

1 trip

1 trip

HINT:

If the conditions of either of these patterns are detected, a DTC will be stored.

WIRING DIAGRAM

for 2WD:
for 4WD:

CAUTION / NOTICE / HINT

CAUTION:

  • Before inspecting the high-voltage system, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.

    Click here 2019 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 -        ]; INTRODUCTION: REPAIR INSTRUCTION: PRECAUTION

  • Do not touch the high-voltage connectors or terminals for 10 minutes after the service plug grip is removed.

    Click here 2023 - 2025 MY Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10): PRECAUTION

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.
    • Before disconnecting battery:

      Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; SETUP: WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL: BEFORE DISCONNECTING BATTERY

    • Automatic learning chart:

      Click here 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; SETUP: WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL: AUTOMATIC LEARNING CHART 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; SETUP: WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL: AUTOMATIC LEARNING CHART

  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • The hybrid control system and air conditioning system output DTCs separately. Perform troubleshooting for the hybrid control system first if DTCs for both systems are output simultaneously.

    Click here 2023 - 2025 MY Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10): HOW TO PROCEED WITH TROUBLESHOOTING

  • The air conditioning system uses the CAN communication system. Inspect the communication functions by following How to Proceed with Troubleshooting. Troubleshoot the air conditioning system after confirming that the communication systems are functioning properly.

    Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): HOW TO PROCEED WITH TROUBLESHOOTING

PROCEDURE

1.

CHECK FOR DTC (HYBRID CONTROL)

(a) Check for DTCs.

Powertrain > Hybrid Control > Trouble Codes

Result

Proceed to

P058A01 and P162B87 are not output

A

P058A01 or P162B87 is output

B

B

GO TO STEP 7

A

2.

CHECK HARNESS AND CONNECTOR (COMPRESSOR WITH MOTOR ASSEMBLY - AUXILIARY BATTERY AND BODY GROUND)

CAUTION:

Do not disconnect the connector on the high-voltage side.

NOTICE:

As other DTCs will be stored when the ignition switch is turned to ON with the connector disconnected, be sure to clear the DTCs after the inspection.

(a) Disconnect the C96 compressor with motor assembly connector.

*a

Front view of wire harness connector

(to Compressor with Motor Assembly)

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

C96-1 (IG1) - Body ground

Ignition switch ON

11 to 14 V

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

C96-2 (GND) - Body ground

Always

Below 1 Ω

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

CHECK HARNESS AND CONNECTOR (COMPRESSOR WITH MOTOR ASSEMBLY - HYBRID VEHICLE CONTROL ECU)

(a) Disconnect the C96 compressor with motor assembly connector.

(b) Disconnect the A161 hybrid vehicle control ECU connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

C96-3 (DOUT) - A161-16 (LIN3)

Always

Below 1 Ω

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

INSPECT HV AIR CONDITIONING WIRE

CAUTION:

Be sure to wear insulated gloves.

(a) Disconnect the X1 compressor with motor assembly connector.

(b) Remove the HV air conditioning wire from the inverter with converter assembly.

Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: INVERTER WITH CONVERTER: REMOVAL

NOTICE:

Make sure that no foreign matter, water, etc., enters the inverter with converter assembly.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance (for 2WD):

Tester Connection

Condition

Specified Condition

X1-2 (PB) - X3-1 (ACPB)

Always

Below 1 Ω

Standard Resistance (for 4WD):

Tester Connection

Condition

Specified Condition

X1-2 (PB) - X4-1 (ACPB)

Always

Below 1 Ω

NG

GO TO STEP 6

OK

5.

INSPECT HV AIR CONDITIONING WIRE

CAUTION:

Be sure to wear insulated gloves.

(a) Disconnect the X1 compressor with motor assembly connector.

(b) Remove the HV air conditioning wire from the inverter with converter assembly.

Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: INVERTER WITH CONVERTER: REMOVAL

NOTICE:

Make sure that no foreign matter, water, etc., enters the inverter with converter assembly.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance (for 2WD):

Tester Connection

Condition

Specified Condition

X1-1 (PE) - X3-2 (ACPE)

Always

Below 1 Ω

Standard Resistance (for 4WD):

Tester Connection

Condition

Specified Condition

X1-1 (PE) - X4-2 (ACPE)

Always

Below 1 Ω

OK

REPLACE COMPRESSOR WITH MOTOR ASSEMBLY 2023 MY Corolla Corolla HV [09/2022 - 11/2022]; HEATING / AIR CONDITIONING: COMPRESSOR (for 2ZR-FXE): REMOVAL 2023 - 2025 MY Corolla Corolla HV [11/2022 -        ]; HEATING / AIR CONDITIONING: COMPRESSOR (for 2ZR-FXE): REMOVAL

NG

REPLACE HV AIR CONDITIONING WIRE

6.

INSPECT HV AIR CONDITIONING WIRE

CAUTION:

Be sure to wear insulated gloves.

(a) Disconnect the X1 compressor with motor assembly connector.

(b) Remove the HV air conditioning wire from the inverter with converter assembly.

Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: INVERTER WITH CONVERTER: REMOVAL

NOTICE:

Make sure that no foreign matter, water, etc., enters the inverter with converter assembly.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

X1-2 (PB) - Other terminals and body ground

Always

10 kΩ or higher

OK

REPLACE COMPRESSOR WITH MOTOR ASSEMBLY AND HV AIR CONDITIONING WIRE

Compressor with motor assembly:

  • Click here 2023 MY Corolla Corolla HV [09/2022 - 11/2022]; HEATING / AIR CONDITIONING: COMPRESSOR (for 2ZR-FXE): REMOVAL 2023 - 2025 MY Corolla Corolla HV [11/2022 -        ]; HEATING / AIR CONDITIONING: COMPRESSOR (for 2ZR-FXE): REMOVAL

HV air conditioning wire:

  • Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: INVERTER WITH CONVERTER: REMOVAL

NG

REPLACE HV AIR CONDITIONING WIRE

7.

CHECK FOR DTC

(a) Disconnect the G29 battery state sensor assembly connector.

(b) Check for DTCs.

Body Electrical > Air Conditioner > Trouble Codes

Result

Proceed to

B149887 is not output

A

B149887 is output

B

A

REPLACE BATTERY STATE SENSOR ASSEMBLY 2023 MY Corolla Corolla HV [09/2022 - 11/2022]; 2ZR-FXE (BATTERY / CHARGING): BATTERY CURRENT SENSOR: REMOVAL 2023 - 2025 MY Corolla Corolla HV [11/2022 -        ]; 2ZR-FXE (BATTERY / CHARGING): BATTERY CURRENT SENSOR: REMOVAL

B

8.

CHECK FOR DTC (HYBRID CONTROL)

(a) Connect the A162 battery state sensor assembly connector.

(b) Disconnect the C96 compressor with motor assembly connector.

(c) Check for DTCs.

Powertrain > Hybrid Control > Trouble Codes

Result

Proceed to

P058A01 and P162B87 are not output

A

P058A01 or P162B87 is output

B

A

REPLACE COMPRESSOR WITH MOTOR ASSEMBLY 2023 MY Corolla Corolla HV [09/2022 - 11/2022]; HEATING / AIR CONDITIONING: COMPRESSOR (for 2ZR-FXE): REMOVAL 2023 - 2025 MY Corolla Corolla HV [11/2022 -        ]; HEATING / AIR CONDITIONING: COMPRESSOR (for 2ZR-FXE): REMOVAL

B

9.

CHECK HARNESS AND CONNECTOR (COMPRESSOR WITH MOTOR ASSEMBLY - HYBRID VEHICLE CONTROL ECU)

(a) Disconnect the A161 hybrid vehicle control ECU connector.

(b) Disconnect the C96 compressor with motor assembly connector.

(c) Disconnect the A162 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

A161-16 (LIN3) - C96-3 (DOUT)

Always

Below 1 Ω

A161-16 (LIN3) - A162-2 (LIN)

Always

Below 1 Ω

A161-16 (LIN3) - Other terminals and body ground

Always

10 kΩ or higher

C96-3 (DOUT) - Other terminals and body ground

Always

10 kΩ or higher

A162-2 (LIN) - Other terminals and body ground

Always

10 kΩ or higher

OK

REPLACE HYBRID VEHICLE CONTROL ECU

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR