DTC P0A11-12: DC/DC Converter Enable Circuit Short to Battery [08/2023 - ]: Procedure
- CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR)
See step 1
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 Result:
B
CONNECT SECURELY
Result:
C
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
A
See step 2
- CHECK CONNECTOR CONNECTION CONDITION (DC/DC CONVERTER ASSEMBLY CONNECTOR)
- Check the connector connections and contact pressure of the relevant terminals for the DC/DC converter assembly.
HINT:
Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [10/2022 - ]
OK
The terminals are not deformed and are connected securely.
Result
Proceed to OK NG
Result:
NG
CONNECT SECURELY
Result:
OK
See step 3
- Check the connector connections and contact pressure of the relevant terminals for the DC/DC converter assembly.
- CLEAR DTC
See step 3
Result
Proceed to NEXT Result:
NEXT
See step 4
- CHECK DTC OUTPUT (HYBRID CONTROL)
Pre-procedure1
- Depress the brake pedal and turn the ignition switch to ON (READY).
HINT:
Perform this step to check if the ignition switch can be turned to ON (READY).
- Check for DTCs.
Powertrain > Hybrid Control > Trouble Codes
Result
Result Proceed to Ignition switch can be turned to ON (READY) and P0A11-12 is not output. A Ignition switch cannot be turned to ON (READY) and P0A11-12 is output. B
Post-procedure1
- Turn the ignition switch off.
Result:
A
USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - ]
Result:
B
See step 5
- Depress the brake pedal and turn the ignition switch to ON (READY).
- CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY (NODD) WARNING:
Be sure to wear insulated gloves.
Pre-procedure1
- Check that the service plug grip is not installed.NOTE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the appropriate service information because this may cause a malfunction.
- Disconnect the DC/DC converter assembly connector.
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition Result H5-5 (NODD) - Body ground Ignition switch ON Below 1 V V *a Front view of wire harness connector
(to DC/DC Converter Assembly)NOTE:Turning the ignition switch to ON with the DC/DC converter assembly connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.
Result
Proceed to OK NG
Post-procedure1
- Turn the ignition switch off.
- Reconnect the DC/DC converter assembly connector.
Result:
OK
REPLACE DC/DC CONVERTER ASSEMBLY. Refer to REMOVAL [08/2023 - ]
Result:
NG
See step 6
- Check that the service plug grip is not installed.
- CHECK HARNESS AND CONNECTOR (DC/DC CONVERTER ASSEMBLY - HYBRID VEHICLE CONTROL ECU) WARNING:
Be sure to wear insulated gloves.
Pre-procedure1
- Check that the service plug grip is not installed.NOTE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the appropriate service information because this may cause a malfunction.
- Disconnect the DC/DC converter assembly connector.
- Disconnect the hybrid vehicle control ECU connector.
- Turn the ignition switch to ON.
- Measure the voltage according to the value(s) in the table below.
*a Front view of wire harness connector
(to DC/DC Converter Assembly)*b Front view of wire harness connector
(to Hybrid Vehicle Control ECU)Standard Voltage
Tester Connection Condition Specified Condition Result H5-5 (NODD) or A21-47 (NODD) - Body ground and other terminals Ignition switch ON Below 1 V V Result
Proceed to OK NG
Post-procedure1
- Reconnect the hybrid vehicle control ECU connector.
- Reconnect the DC/DC converter assembly connector.
Result:
OK
REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY. Refer to REMOVAL [10/2022 - ]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
- Check that the service plug grip is not installed.