DTC Code | DTC Name |
---|---|
P324E-788 | MG-ECU Power Relay Intermittent Circuit |
DESCRIPTION
If the MG ECU located in the inverter with converter assembly is reset due to a problem with the power source in the inverter, the hybrid vehicle control ECU assembly will stored this DTC.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate |
---|---|---|---|---|---|
P324E-788 | MG-ECU Power Relay Intermittent Circuit | Error in reset signal from the inverter assembly power source IC |
|
Does not come on | Master Warning Light: Comes on |
WIRING DIAGRAM
*a | from Auxiliary Battery |
*b | Hybrid Vehicle Control ECU Assembly |
*c | Inverter with Converter Assembly |
CAUTION / NOTICE / HINT
CAUTION:
Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, 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.
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.
Tech Tips
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
Note
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.
PROCEDURE
CHECK DTC OUTPUT (HYBRID CONTROL)
Connect the GTS to the DLC3.
Turn the power switch on (IG).
Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
Check for DTCs.
Result | ||||||
---|---|---|---|---|---|---|
|
Turn the power switch off.
B |
GO TO DTC CHART (HYBRID CONTROL SYSTEM) Click here |
A |
CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR)
Result | |||
---|---|---|---|
|
CAUTION:
Be sure to wear insulated gloves.
Check that the service plug grip is not installed.
Note
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.
Check the connector connections and contact pressure of the low voltage connectors of the inverter with converter assembly.
Note
Before disconnecting the connector, confirm that it is properly connected by checking that the locking claws are engaged and that the connector does not pull out.
OK |
---|
The connectors are connected securely and there are no contact pressure problems. |
Tech Tips
When connecting the connector, insert it with the locking lever in the raised position. Rotate the lever downward and make sure that the connector is pulled into its socket. When the locking lever is in its fully closed position, a click will be heard as its locking claws engage. After the click is heard, pull up on the connector to confirm that it is properly connected.
Result | |||
---|---|---|---|
|
NG |
CONNECT SECURELY |
OK |
CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - IGCT RELAY)
CAUTION:
Be sure to wear insulated gloves.
Check that the service plug grip is not installed.
Note
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.
Disconnect the A143 inverter with converter assembly connector.
Remove the IGCT relay from the No. 1 engine room relay block and No. 1 junction block assembly.
Measure the resistance according to the value(s) in the table below.
*1 | No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly | *2 | IGCT Relay |
*a | Front view of wire harness connector (to Inverter with Converter Assembly) |
- | - |
Standard Resistance | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Install the IGCT relay.
Reconnect the A143 inverter with converter assembly connector.
Result | |||
---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
CHECK DTC OUTPUT (HYBRID CONTROL)
Connect the GTS to the DLC3.
Turn the power switch on (IG).
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Check for DTCs.
Result | ||||||
---|---|---|---|---|---|---|
|
Turn the power switch off.
B |
GO TO DTC CHART (HYBRID CONTROL) Click here |
A |
CLEAR DTC
Result | ||
---|---|---|
|
Connect the GTS to the DLC3.
Turn the power switch on (IG).
Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
Read and record the DTCs and freeze frame data.
Clear the DTCs and freeze frame data.
Turn the power switch off.
Result | ||
---|---|---|
|
NEXT |
CHECK DTC OUTPUT (HYBRID CONTROL)
Connect the GTS to the DLC3.
Turn the power switch off and wait for 30 seconds or more.
Turn the power switch on (IG) and wait for 5 seconds or more.
Turn the power switch on (READY).
Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
Check for DTCs.
Result | ||||||||
---|---|---|---|---|---|---|---|---|
|
Turn the power switch off.
A |
REPLACE MG CONTROL COMPUTER Click here |
B |
REPLACE POWER MODULE INTELLIGENT TRANSISTOR KIT AND MG CONTROL COMPUTER Click here |
C |
GO TO DTC CHART (HYBRID CONTROL) Click here |