| Last Modified: 01-30-2024 | 6.11:8.1.0 | Doc ID: RM100000001OBBG |
| Model Year Start: 2020 | Model: RAV4 HV | Prod Date Range: [06/2020 - ] |
| Title: HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY): P312387; Lost Communication with Drive Motor Control Module "A" from Hybrid/EV Control Module Missing Message; 2020 - 2024 MY RAV4 HV [06/2020 - ] | ||
|
DTC |
P312387 |
Lost Communication with Drive Motor Control Module "A" from Hybrid/EV Control Module Missing Message |
DESCRIPTION
Refer to the description for P0D2D16.
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![2020 - 2024 MY RAV4 HV [06/2020 - ]; HYBRID / BATTERY CONTROL: MOTOR GENERATOR CONTROL SYSTEM (for LITHIUM-ION BATTERY): P0D2D16,P0D2D17,P0D2D1F; Drive Motor "A" Inverter Voltage Sensor(VH) Circuit Voltage Below Threshold+](/t3Portal/stylegraphics/info.gif)
The MG ECU, which is built into in the inverter with converter assembly, controls motor (MG2) based on commands from the hybrid vehicle control ECU assembly.
The hybrid vehicle control ECU assembly monitors communication data and detects malfunctions.
A communication error between the MG ECU and the hybrid vehicle control ECU assembly.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Warning Indicate |
|---|---|---|---|---|---|
|
P312387 |
Lost Communication with Drive Motor Control Module "A" from Hybrid/EV Control Module Missing Message |
Error in reception from inverter with converter assembly (MG ECU) via serial communication (out of communication standard) (1 trip detection logic) |
|
Comes on |
Master Warning: Comes on |
MONITOR DESCRIPTION
The hybrid vehicle control ECU assembly monitors communication data and detects malfunctions, it will illuminate the MIL and store a DTC.
MONITOR STRATEGY
|
Related DTCs |
P3123 (INF P312387): Lost Communication With Drive Motor "A" Control Module Verify communication |
|
Required sensors / components |
Main: Hybrid vehicle control ECU assembly Sub: Inverter with converter assembly |
|
Frequency of operation |
Continuous |
|
Duration |
TMC's intellectual property |
|
MIL operation |
Immediately |
|
Sequence of operation |
None |
TYPICAL ENABLING CONDITIONS
|
The monitor will run whenever the following DTCs are not stored |
TMC's intellectual property |
|
Other conditions belong to TMC's intellectual property |
- |
TYPICAL MALFUNCTION THRESHOLDS
|
TMC's intellectual property |
- |
COMPONENT OPERATING RANGE
|
Hybrid vehicle control ECU assembly |
DTC P3123 (INF P312387) is not detected |
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.
Click here
-
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
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- 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 ignition switch ON and wait for 2 minutes or more. [*1]
HINT:
[*1]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- Enter the following menus: Powertrain / Hybrid Control / 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 the normal judgment procedure again.
WIRING DIAGRAM
Refer to the wiring diagram for the inverter low-voltage circuit.
Click here
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.
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*a
Without waiting for 10 minutes
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. |
INSPECT FUSE (PCU) |
(a) Remove the PCU fuse from the No. 3 relay block and junction block assembly.
|
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
(c) Install the PCU fuse.
| NG |
|
|
|
2. |
CLEAR DTC |
Click here
|
|
3. |
CHECK DIAGNOSIS RELATED INFORMATION AND DTC OUTPUT (HYBRID CONTROL) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON and wait for 2 minutes or more.
(c) Enter the following menus: Powertrain / Hybrid Control / Utility / Diagnosis Related Information.
Powertrain > Hybrid Control > Utility
|
Tester Display |
|---|
|
Diagnosis Related Information |
(d) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
Powertrain > Hybrid Control > Trouble Codes
(e) Check for DTCs.
Result |
Proceed to |
|---|---|
|
P312387 is listed in Diagnosis Related Information or DTC P312387 is output. |
A |
|
P312387 is not listed in Diagnosis Information and DTC P312387 is not output. |
B |
(f) Turn the ignition switch off.
| B |
|
|
|
4. |
CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU ASSEMBLY CONNECTOR) |
|
(a) Check the connector connections and contact pressure of the relevant terminals for the hybrid vehicle control ECU assembly connectors. Click here
OK: The connectors are connected securely and there are no contact pressure problems. |
|
| NG |
|
CONNECT SECURELY |
|
|
5. |
CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR) |
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) Check the connection condition of the low voltage connectors of the inverter with converter assembly and the contact pressure of each terminal. Check the terminals for deformation, and the connector for water and foreign matter. Click here
NOTICE: Before disconnecting the connector, confirm that it is properly connected by checking that the claws of the lock levers are engaged and that the connector cannot be pulled off. OK: - The connector is connected securely. - The terminals are not deformed and are connected securely. - No water or foreign matter in the connector. Result:
HINT: When connecting the connector, connect it with the lock levers raised. Rotate each lock lever downward and make sure that the connector is securely connected. When a lock lever is fully lowered, a click will be heard as its claw engages. After the click is heard, pull up on the connector to confirm that it is securely connected. |
|
| B |
|
CONNECT SECURELY |
| C |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
6. |
CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY 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.
Click here
|
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
(d) Connect the cable to the negative (-) auxiliary battery terminal.
(e) Turn the ignition switch to ON.
(f) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A87-36 (+B) - Body ground |
Ignition switch ON |
11 to 14 V |
|
A87-35 (+B2) - Body ground |
Ignition switch ON |
11 to 14 V |
NOTICE:
Turning the ignition switch to ON with the inverter with converter assembly disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.
(g) Turn the ignition switch off.
(h) Disconnect the cable from the negative (-) auxiliary battery terminal.
(i) Reconnect the A87 inverter with converter assembly connector.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
7. |
CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - HYBRID VEHICLE CONTROL ECU 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) Disconnect the A87 inverter with converter assembly connector.
(c) Disconnect the A29 hybrid vehicle control ECU assembly connector.
(d) Connect the cable to the negative (-) auxiliary battery terminal.
(e) Turn the ignition switch to ON.
|
(f) Measure the voltage according to the value(s) in the table below. Standard Voltage:
NOTICE: Turning the ignition switch to ON with the hybrid vehicle control ECU assembly connector and the inverter with converter assembly disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection. |
|
(g) Turn the ignition switch off.
(h) Disconnect the cable from the negative (-) auxiliary battery terminal.
(i) Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Open):
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A87-4 (HMCL) - A29-14 (HMCL) |
Ignition switch off |
Below 1 Ω |
|
A87-3 (HMCH) - A29-4 (HMCH) |
Ignition switch off |
Below 1 Ω |
Standard Resistance (Check for Short):
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A87-4 (HMCL) or A29-14 (HMCL) - Body ground and other terminals |
Ignition switch off |
10 kΩ or higher |
|
A87-3 (HMCH) or A29-4 (HMCH) - Body ground and other terminals |
Ignition switch off |
10 kΩ or higher |
HINT:
As there might be an intermittent malfunction, inspect the following items even if the measured resistance is as specified.
Check that each connector between the inverter with converter assembly and hybrid vehicle control ECU assembly is not loose or disconnected.
(j) Reconnect the A29 hybrid vehicle control ECU assembly connector.
(k) Reconnect the A87 inverter with converter assembly connector.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
8. |
CHECK HYBRID VEHICLE CONTROL ECU 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) Disconnect the A87 inverter with converter assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
|
*a |
Component with harness connected (Hybrid Vehicle Control ECU Assembly) |
- |
- |
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A29-14 (HMCL) - A29-4 (HMCH) |
Ignition switch off |
110 to 130 Ω |
(d) Reconnect the A87 inverter with converter assembly connector.
| OK |
|
REPLACE INVERTER WITH CONVERTER ASSEMBLY
|
| NG |
|
REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY
|
|
9. |
REPLACE FUSE (PCU) |
|
(a) Replace the PCU fuse. |
|
(b) Turn the ignition switch to ON (READY).
(c) Check if there is an open circuit in the PCU fuse in the No. 3 relay block and junction block assembly.
OK:
There is no open circuit in the PCU fuse.
HINT:
If the fuse does not become open again after turning the ignition switch to ON (READY), it can be assumed that the previous fuse failed due to age.
(d) Turn the ignition switch off.
| OK |
|
COMPLETED |
|
|
10. |
CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - PCU FUSE) |
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 PCU 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 |
PCU Fuse Terminal |
|
*a |
Front view of wire harness connector (to Inverter with Converter Assembly) |
- |
- |
Standard Resistance (Check for Short):
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A87-36 (+B), A87-35 (+B2) or 2 (PCU fuse terminal) - Body ground and other terminals |
Ignition switch off |
10 kΩ or higher |
(e) Reconnect the A87 inverter with converter assembly connector.
(f) Install the PCU fuse.
| NG |
|
|
|
11. |
REPLACE INVERTER WITH CONVERTER ASSEMBLY |
Click here
| NEXT |
|
REPLACE FUSE (PCU) |
|
12. |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
| NEXT |
|
REPLACE FUSE (PCU) |
|
|