| Last Modified: 01-30-2024 | 6.11:8.1.0 | Doc ID: RM100000001H8PR |
| Model Year Start: 2019 | Model: RAV4 HV | Prod Date Range: [02/2019 - ] |
| Title: HYBRID / BATTERY CONTROL: MOTOR GENERATOR CONTROL SYSTEM (for AWD with NICKEL METAL HYDRIDE BATTERY): P1BFCA2; Battery Discharge Control Circuit System Voltage Low; 2019 - 2024 MY RAV4 HV [02/2019 - ] | ||
|
DTC |
P1BFCA2 |
Battery Discharge Control Circuit System Voltage Low |
DESCRIPTION
The motor generator ECU located in the inverter with converter assembly receives power from the IGCT power source line and discharge control power source line. A semiconductor switch is installed in the motor generator ECU to switch which is used to switch the discharge control power source line power source on and off.
The motor generator ECU outputs the following DTC when it detects a discharge control power source line wiring malfunction or a semiconductor switch stuck off malfunction.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Warning Indicate |
|---|---|---|---|---|---|
|
P1BFCA2 |
Battery Discharge Control Circuit System Voltage Low |
When the motor generator ECU is started, the discharge control BAT switch command flag is changed from OFF to ON after a certain period of time elapses, but the discharge control BAT voltage does not increase. (1 trip detection logic) |
|
Does not come on |
Master Warning: Comes on |
CONFIRMATION DRIVING PATTERN
HINT:
After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
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![2019 - 2024 MY RAV4 HV [02/2019 - ]; HYBRID / BATTERY CONTROL: MOTOR GENERATOR CONTROL SYSTEM (for AWD with NICKEL METAL HYDRIDE BATTERY): UTILITY](/t3Portal/stylegraphics/info.gif)
- Connect the Techstream to the DLC3.
- Turn the ignition switch to ON and turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the ignition switch off and wait for 2 minutes or more.
- Turn the ignition switch to ON and turn the Techstream on.
- With the ignition switch ON and wait for 10 seconds or more.
- Enter the following menus: Powertrain / Motor Generator / Utility / All Readiness.
-
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform driving pattern again.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
CAUTION:
-
Before the following operations are conducted, take precautions to prevent electric shock by turning the ignition switch off, wearing insulated gloves, and removing the service plug grip from HV battery.
- Inspecting the high-voltage system
- Disconnecting the low voltage connector of the inverter with converter assembly
- Disconnecting the low voltage connector of the HV battery
-
To prevent electric shock, make sure to remove the service plug grip to cut off the high voltage circuit before servicing the vehicle.
-
After removing the service plug grip from the HV battery, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
-
After removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.
*a
Without waiting for 10 minutes
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HINT:
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
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.
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PROCEDURE
|
1. |
CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR) |
Click here
|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (The connector is not connected securely.) |
B |
|
NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) |
C |
| B |
|
CONNECT SECURELY |
| C |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
2. |
CHECK HARNESS AND CONNECTOR (DISCHARGE CONTROL POWER SOURCE CIRCUIT) |
CAUTION:
Be sure to wear insulated gloves.
(a) Check that the service plug grip is not installed.
NOTICE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
(b) Disconnect the A87 inverter with converter assembly connector.
|
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
(d) Reconnect the A87 inverter with converter assembly connector.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - BODY GROUND) |
|
|
3. |
CHECK FUSE (MG) |
|
(a) Remove the MG fuse from the No. 3 relay block and junction block assembly. |
|
(b) Check if there is an open circuit in the MG fuse in the No. 3 relay block and junction block assembly.
OK:
There is no open circuit in the MG fuse.
(c) Install the MG fuse.
| NG |
|
REPLACE FUSE (MG) |
|
|
4. |
CHECK HARNESS AND CONNECTOR (MG FUSE - INVERTER WITH CONVERTER ASSEMBLY) |
CAUTION:
Be sure to wear insulated gloves.
(a) Check that the service plug grip is not installed.
NOTICE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
(b) Remove the MG fuse from the No. 3 relay block and junction block assembly.
(c) Disconnect the A87 inverter with converter assembly connector.
(d) Measure the resistance according to the value(s) in the table below.
|
*1 |
No. 3 Relay Block and Junction Block Assembly |
*2 |
MG Fuse Terminal |
|
*a |
Front view of wire harness connector (to Inverter with Converter Assembly) |
- |
- |
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
2 (MG fuse terminal) - A87-27 (+B3) |
Ignition switch off |
Below 1 Ω |
(e) Reconnect the A87 inverter with converter assembly connector.
(f) Install the MG fuse.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
5. |
CHECK HARNESS AND CONNECTOR (MG FUSE - AUXILIARY BATTERY TERMINAL) |
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the cable from the positive (+) auxiliary battery terminal.
|
(c) Remove the MG fuse from the No. 3 relay block and junction block assembly. |
|
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
1 (MG fuse terminal) - Auxiliary battery positive (+) cable |
Ignition switch off |
Below 1 Ω |
|
1 (MG fuse terminal) - Body ground |
Ignition switch off |
10 kΩ or higher |
(e) Connect the cable to the positive (+) auxiliary battery terminal.
(f) Connect the cable to the negative (-) auxiliary battery terminal.
(g) Install the MG fuse.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
6. |
CHECK HARNESS AND CONNECTOR (DISCHARGE CONTROL POWER SOURCE CIRCUIT) |
CAUTION:
Be sure to wear insulated gloves.
(a) Check that the service plug grip is not installed.
NOTICE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
(b) Disconnect the A87 inverter with converter assembly connector.
(c) Connect the cable to the negative (-) auxiliary battery terminal.
|
(d) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
(e) Disconnect the cable from the negative (-) auxiliary battery terminal.
(f) Reconnect the A87 inverter with converter assembly connector.
| OK |
|
| NG |
|
CHECK AUXILIARY BATTERY
|
|
|