DTC SUMMARY
MALFUNCTION DESCRIPTION
The hybrid vehicle control ECU detects malfunctions which prevent the inverter with converter assembly emergency shutdown circuit (HSDN) from shutting down the hybrid control system. Detection is performed when the power switch is turned on (IG) and during the shutdown sequence when the power switch is turned off.
The cause of this malfunction may be one of the following:
DESCRIPTION
The hybrid vehicle control ECU sends a block signal to the motor generator control ECU (MG ECU) to shutdown the power supply to the motor. When the system is not in the on (READY) state, it sends an HSDN (MG shutdown signal) signal from the hybrid vehicle control ECU to the motor generator control ECU (MG ECU) to check the function of the HV gate block. When a malfunction is detected in the HV gate block function, DTCs are stored.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate |
---|---|---|---|---|---|
P321E9F | Motor/Generator Shutdown Signal Stuck Off | When the HV gate block function check is performed (when the power switch is turned from on (READY) to off), the inverter voltage (VH) drops and current flows in the inverter. (1 trip detection logic) |
| Does not come on | Master Warning Light: Comes on |
DTC No. | Data List |
---|---|
P321E9F |
|
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
HINT:
WIRING DIAGRAM
Refer to the wiring diagram for the shut down signal circuit.
Click here
CAUTION / NOTICE / HINT
CAUTION:
Click here
HINT:
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
*a | Without waiting for 10 minutes |
NOTICE:
After turning the power 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
PROCEDURE
1. | CHECK DTC OUTPUT (HYBRID CONTROL) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
(d) Check for DTCs.
Powertrain > Hybrid Control > Trouble Codes Result | Proceed to |
---|---|
P321E9F only is output, or DTCs except the ones in the table below are also output. | A |
Any of the following DTCs are also output. | B |
Malfunction Content | Relevant DTC | |
---|---|---|
Sensor and actuator circuit malfunction | P33B99F | Motor/Generator Shutdown Signal (Hybrid/EV Side) Stuck Off |
P33BF9F | Motor/Generator Shutdown Signal (MG Side) Stuck Off |
HINT:
(e) Turn the power switch off.
B | GO TO DTC CHART (HYBRID CONTROL SYSTEM) |
|
2. | CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR) |
Click here
NG | CONNECT SECURELY |
|
3. | 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 |
|
4. | CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - HYBRID VEHICLE CONTROL ECU) |
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 power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.
(b) Disconnect the A58 inverter with converter assembly connector.
(c) Disconnect the A33 hybrid vehicle control ECU connector.
(d) Measure the resistance according to the value(s) in the table below. Standard Resistance:
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 is not loose or disconnected. |
|
(e) Reconnect the A33 hybrid vehicle control ECU connector.
(f) Reconnect the A58 inverter with converter assembly connector.
NG | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
5. | CHECK 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 power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.
(b) Disconnect the A58 inverter with converter assembly connector.
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
NOTICE: Be sure not to damage or deform the terminal being inspected. |
|
(d) Reconnect the A58 inverter with converter assembly connector.
OK | REPLACE HYBRID VEHICLE CONTROL ECU |
NG | REPLACE INVERTER WITH CONVERTER ASSEMBLY |