Toyota Corolla Cross: A/C Inverter Local Missing Message (B149887)
DESCRIPTION
The hybrid vehicle control ECU and compressor with motor assembly communicate via direct line. Compressor control is stopped and this DTC is stored if communication information is cut off or abnormal information is received.
This DTC is also detected if high-voltage electricity 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 |
|---|---|---|---|---|
| B149887 |
A/C Inverter Local Missing Message |
Diagnosis Condition:
Malfunction Status:
Detection Time:
|
| Memorized |
|
Vehicle Condition | ||||
|---|---|---|---|---|
|
Pattern 1 | Pattern 2 |
Pattern 3 | ||
|
Diagnosis Condition | READY ON |
○ | ○ |
○ |
|
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
.png)
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
.gif)
- Do not touch the high-voltage connectors or terminals for 10 minutes after the service plug grip is removed.
Click here
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.
Click here
- When the cable is disconnected from the negative (-) auxiliary battery terminal, the memory of various systems will be cleared. Because of this, be sure to make a record of the contents memorized in each system before starting work. When work is finished, adjust each system to its previous state.
- 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
- 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
PROCEDURE
|
1. | CHECK FOR DTC |
(a) Check if hybrid control system DTCs are output.
Powertrain > Hybrid Control > Trouble Codes|
Result | Proceed to |
|---|---|
|
DTCs are not output | A |
|
DTCs are output | B |
| B |
.gif) | GO TO HYBRID CONTROL SYSTEM |
|
.gif)
| 2. |
CHECK HARNESS AND CONNECTOR (COMPRESSOR WITH MOTOR ASSEMBLY - HYBRID VEHICLE CONTROL ECU) |
Pre-procedure1
(a) Disconnect the C143 compressor with motor assembly connector.
(b) Disconnect the A192 hybrid vehicle control ECU connector.
(c) Disconnect the O206 battery state sensor assembly connector.
Procedure1
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
C143-3 (DOUT) - A192-16 (LIN3) |
Always | Below 1 Ω |
|
C143-3 (DOUT) or A192-16 (LIN3) - Other terminals and body ground |
Always | 10 kΩ or higher |
Post-procedure1
(e) None
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 3. |
CHECK HARNESS AND CONNECTOR (COMPRESSOR WITH MOTOR ASSEMBLY - IG POWER SOURCE AND BODY GROUND) |
CAUTION:
Do not disconnect the connector on the high-voltage side.
(a) Measure the voltage and resistance according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection | Switch Condition |
Specified Condition |
|---|---|---|
|
C143-1 (IG1) - Body ground |
Ignition switch ON | 11 to 14 V |
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
C143-2 (GND) - Body ground |
Always | Below 1 Ω |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 4. |
INSPECT HV AIR CONDITIONING WIRE |
CAUTION:
Be sure to wear insulated gloves.
Pre-procedure1
(a) Remove the HV air conditioning wire.
HINT:
Click here
Procedure1
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
x1-2 (PB) - x2-1 (ACPB) |
Always | Below 1 Ω |
|
x1-1 (PE) - x2-2 (ACPE) |
Always | Below 1 Ω |
|
x1-2 (PB) - Other terminals and body ground |
Always | 10 kΩ or higher |
Post-procedure1
(c) None
| OK | |
REPLACE COMPRESSOR WITH MOTOR ASSEMBLY |
| NG | | REPLACE HV AIR CONDITIONING WIRE |
READ NEXT:
Lost Communication with Front Panel LIN Missing Message (B14B287)
DESCRIPTION The air conditioning control assembly communicates with the air conditioning amplifier assembly via LIN communication.
If a malfunction occurs in the LIN communication system, the air co
Ambient Temperature Sensor Circuit Short to Ground (P007011)
DESCRIPTION The thermistor assembly is installed in front of the cooler condenser assembly to detect the ambient temperature, which is used to control the air conditioning system. This sensor is conne
Ambient Temperature Sensor Circuit Short to Battery or Open (P007015)
DESCRIPTION The thermistor assembly is installed in front of the cooler condenser assembly to detect the ambient temperature, which is used to control the air conditioning system. This sensor is conne
SEE MORE:
Precaution
PRECAUTION
PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE AUXILIARY BATTERY
TERMINAL
NOTICE:
After the ignition switch is turned off, there may be a waiting
time before disconnecting the negative (-) auxiliary battery terminal.
Click here
HINT:
When disconnecting and reconnecting the a
Lost Communication With ECM/PCM "A" Missing Message (U010087,...,U113387)
DESCRIPTION The combination meter assembly communicates with each ECU via CAN communication.
DTC No. Detection Item
DTC Detection Condition Trouble Area
U010087 Lost Communication With ECM/PCM "A" Missing Message
Diagnosis Condition:
The ignition switch is ON
