P0A94-127 - DC / DC Converter Performance
L110F HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P0A94-127: DC / DC Converter Performance
P0A94-127 - DC / DC Converter Performance
DESCRIPTION
For a description of the boost converter, P0A94.
If the boost converter detects a circuit malfunction or overvoltage, it transmits this information to the MG ECU via the boost converter overvoltage signal line.
MONITOR DESCRIPTION
If the boost converter detects overvoltage, it transmits a boost converter overvoltage signal to the MG ECU. Upon receiving this signal, the hybrid vehicle control ECU will illuminate the MIL and set a DTC.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
COMPONENT OPERATING RANGE
INSPECTION PROCEDURE
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 disconnecting 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.
HINT
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
PROCEDURE
1. CHECK DTC OUTPUT (HV)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
(d) Check if DTCs are output.
Result:
HINT
- *1: If any INF codes are output for this DTC, refer to the corresponding diagnostic flowchart.
- P0A94-127 may be set due to a malfunction which also causes DTCs in the preceding table to be set. In this case, first troubleshoot the output DTCs in the preceding table. Then, perform a test to attempt to reproduce the problems, and check that no DTCs are output.
B -- GO TO DTC CHART Hybrid Control System
A -- Continue to next step.
2. CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR) P0A78
NG -- CONNECT SECURELY
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - GENERATOR RESOLVER) P0A78
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. CHECK GENERATOR RESOLVER P0A78
NG -- CHECK CONNECTOR CONNECTION CONDITION (GENERATOR RESOLVER CONNECTOR)
OK -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - MOTOR RESOLVER) P0A78
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
6. CHECK MOTOR RESOLVER P0A78
NG -- CHECK CONNECTOR CONNECTION CONDITION (MOTOR RESOLVER CONNECTOR)
OK -- Continue to next step.
7. CHECK INVERTER WITH CONVERTER ASSEMBLY (GENERATOR CABLE CONNECTION CONDITION) P0A78
C -- CONNECT SECURELY
B -- REPLACE MALFUNCTIONING PARTS
A -- Continue to next step.
8. CHECK INVERTER WITH CONVERTER ASSEMBLY (MOTOR CABLE CONNECTION CONDITION) P0A78
C -- CONNECT SECURELY
B -- REPLACE MALFUNCTIONING PARTS
A -- Continue to next step.
9. CHECK HYBRID VEHICLE TRANSMISSION ASSEMBLY (MG1) P0A78
NG -- CHECK HYBRID VEHICLE TRANSMISSION ASSEMBLY (GENERATOR CABLE CONNECTION CONDITION)
OK -- Continue to next step.
10. CHECK HYBRID VEHICLE TRANSMISSION ASSEMBLY (MG2) P0A78
NG -- CHECK HYBRID VEHICLE TRANSMISSION ASSEMBLY (MOTOR CABLE CONNECTION CONDITION)
OK -- Continue to next step.
11. CHECK CONNECTOR CONNECTION CONDITION (GENERATOR RESOLVER CONNECTOR) P0A78
NG -- CONNECT SECURELY
OK -- Continue to next step.
12. CHECK CONNECTOR CONNECTION CONDITION (MOTOR RESOLVER CONNECTOR) P0A78
NG -- CONNECT SECURELY
OK -- Continue to next step.
13. CHECK INVERTER WITH CONVERTER ASSEMBLY (HIGH VOLTAGE CONNECTOR CONNECTION CONDITION) P0A78
C -- CONNECT SECURELY
B -- REPLACE MALFUNCTIONING PARTS
A -- Continue to next step.
14. CHECK SERVICE PLUG GRIP (CONNECTION CONDITION) P0A78
NG -- REPLACE SERVICE PLUG GRIP Removal
OK -- Continue to next step.
15. CHECK SERVICE PLUG GRIP P0A78
NG -- REPLACE SERVICE PLUG GRIP Removal
OK -- Continue to next step.
16. CHECK FRAME WIRE P0A78
NG -- REPLACE FRAME WIRE Components
OK -- Continue to next step.
17. INSPECT HV BATTERY JUNCTION BLOCK (SMRB) P0A78
NG -- REPLACE HV BATTERY JUNCTION BLOCK Components
OK -- Continue to next step.
18. INSPECT HV BATTERY JUNCTION BLOCK (SMRG) P0A78
NG -- REPLACE HV BATTERY JUNCTION BLOCK Components
OK -- REPLACE INVERTER WITH CONVERTER ASSEMBLY Installation
19. CHECK CONNECTOR CONNECTION CONDITION (GENERATOR RESOLVER CONNECTOR) P0A78
NG -- CONNECT SECURELY
OK -- Continue to next step.
20. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY (MG ECU) - GENERATOR RESOLVER) P0A78
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY Components
21. CHECK CONNECTOR CONNECTION CONDITION (MOTOR RESOLVER CONNECTOR) P0A78
NG -- CONNECT SECURELY
OK -- Continue to next step.
22. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY (MG ECU) - MOTOR RESOLVER) P0A78
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY Components
23. CHECK HYBRID VEHICLE TRANSMISSION ASSEMBLY (GENERATOR CABLE CONNECTION CONDITION) P0A78
C -- CONNECT SECURELY
B -- REPLACE MALFUNCTIONING PARTS
A -- Continue to next step.
24. CHECK GENERATOR CABLE P0A78
NG -- REPLACE GENERATOR CABLE Components
OK -- REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY Components
25. CHECK HYBRID VEHICLE TRANSMISSION ASSEMBLY (MOTOR CABLE CONNECTION CONDITION) P0A78
C -- CONNECT SECURELY
B -- REPLACE MALFUNCTIONING PARTS
A -- Continue to next step.
26. CHECK MOTOR CABLE P0A78
NG -- REPLACE MOTOR CABLE Components
OK -- REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY Components