MOTOR GENERATOR CONTROL SYSTEM, Diagnostic DTC:P0A1112, P0A1114
Info Added 2017-10-06 
| DTC Code | DTC Name |
|---|---|
| P0A1112 | DC/DC Converter Enable Circuit Short to Battery |
| P0A1114 | DC/DC Converter Enable Circuit Short to Ground or Open |
DESCRIPTION
Refer to the description for DTCP1CCC96.
The motor generator control ECU sends a signal to the DC/DC converter to prohibit its control and receives signals indicating a normal or abnormal (below 11 V) condition of the 12 V charging system from the DC/DC converter via the NODD signal line.
If the vehicle is being driven with an inoperative DC/DC converter, the voltage of the auxiliary battery will drop, which will prevent the continued operation of the vehicle. Therefore, the motor generator control ECU monitors the operation of the DC/DC converter and alerts the driver if it detects a malfunction.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate |
|---|---|---|---|---|---|
| P0A1112 | DC/DC Converter Enable Circuit Short to Battery | Short to +B detected in DC/DC converter NODD signal line (1 trip detection logic) |
|
Does not come on | Master Warning Light: Comes on |
| P0A1114 | DC/DC Converter Enable Circuit Short to Ground or Open | Open or short to ground detected in DC/DC converter NODD signal line (1 trip detection logic) |
|
Does not come on | Master Warning Light: Comes on |
CONFIRMATION DRIVING PATTERN
Tech Tips
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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Connect the GTS to the DLC3.
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Turn the power switch on (IG) and turn the GTS on.
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Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
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Turn the power switch off and wait for 2 minutes or more.
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Turn the power switch on (IG) and turn the GTS on.
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With power switch on (IG) and wait for 10 seconds or more.
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Enter the following menus: Powertrain / Motor Generator / Utility / All Readiness.
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Check the DTC judgment result.
Tech Tips
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If the judgment result shows NORMAL, the system is normal.
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If the judgment result shows ABNORMAL, the system has a malfunction.
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If the judgment result shows INCOMPLETE or N/A, perform driving pattern again.
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CAUTION / NOTICE / HINT
CAUTION:
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Before the following operations are conducted, take precautions to prevent electric shock by turning the power switch off, wearing insulated gloves, and removing the service plug grip from HV battery.
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Inspecting the high-voltage system
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Disconnecting the low voltage connector of the inverter with converter assembly
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Disconnecting the low voltage connector of the HV battery
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To prevent electric shock, make sure to remove the service plug grip to cut off the high voltage circuit before servicing the vehicle.
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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.
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*a Without waiting for 10 minutes 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.
Tech Tips
If the NODD signal line is open, DC/DC converter control will be prohibited and the auxiliary battery voltage will be approximately 12 V or less.
PROCEDURE
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CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR)
Result 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 CAUTION:
Be sure to wear insulated gloves.
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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.
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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.
Note
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 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 Tech Tips
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.
A 
REFER TO REPLACE INVERTER WITH CONVERTER ASSEMBLY PARTS Click here
B
CONNECT SECURELY
C
REPAIR OR REPLACE HARNESS OR CONNECTOR
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