DTC P0A94-127: DC / DC Converter Performance: Procedure

WARNING: This page is about a different variant/trim than selected.

CHECK DTC OUTPUT (HV)

Connect the Techstream to the DLC3.
Turn the power switch on (IG).
Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.

Check if DTCs are output.

Result

DTC No.	Relevant Diagnosis
P0A1A (all INF codes) *1	Generator Control Module
P0A1B (all INF codes) *1	Drive Motor "A" Control Module
P0A1D (Except INF code 390)	Hybrid Powertrain Control Module
P0A3F-243	Drive Motor "A" Position Sensor Circuit
P0A40-500	Drive Motor "A" Position Sensor Circuit Range / Performance
P0A41-245	Drive Motor "A" Position Sensor Circuit Low
P0A4B-253	Generator Position Sensor Circuit
P0A4C-513	Generator Position Sensor Circuit Range / Performance
P0A4D-255	Generator Position Sensor Circuit Low
P0A60 (all INF codes) *1	Drive Motor "A" Phase V Current
P0A63 (all INF codes) *1	Drive Motor "A" Phase W Current
P0A72 (all INF codes) *1	Generator Phase V Current
P0A75 (all INF codes) *1	Generator Phase W Current
P0A78-113, 128, 266, 267, 279, 284, 286, 287, 306, 503, 504, 505, 506, 523, 586, 806, 807, 808	Drive Motor "A" Inverter Performance
P0A7A-122, 130, 322, 324, 325, 344, 517, 518, 809, 810, 811	Generator Inverter Performance
P0A90-509	Drive Motor "A" Performance
P0A92-521	Hybrid Generator Performance
P0A94-172, 442, 547, 548, 549, 553, 554, 555, 556, 557, 585, 587, 589, 590	DC/DC Converter Performance
P0AA6-562	Hybrid Battery Voltage System Isolation Fault
P0ADB-227	Hybrid Battery Positive Contactor Control Circuit Low
P0ADC-226	Hybrid Battery Positive Contactor Control Circuit High
P0ADF-229	Hybrid Battery Negative Contactor Control Circuit Low
P0AE0-228	Hybrid Battery Negative Contactor Control Circuit High
P3004-803	High Voltage Power Resource

HINT:

*1: If any INF codes are output for this DTC, refer to the corresponding diagnostic flowchart above.
Turning the power switch on (IG) with the service plug grip and inverter cover removed causes interlock switch system DTC P0A0D-350 to be output.
P0A94-127 may be output due to a malfunction which causes the DTCs in the table above to be output. In this case, first troubleshoot the output DTCs in the table above. Then, perform a reproduction test to check that no DTCs are output.

YES → GO TO DIAGNOSTIC TROUBLE CODE CHART DTC CHART

NO: Go to next step

CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR). Refer to PROCEDURE - Step 4
NG → CONNECT SECURELY

OK: Go to next step
CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - GENERATOR RESOLVER). Refer to PROCEDURE - Step 3
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step
CHECK GENERATOR RESOLVER. Refer to PROCEDURE - Step 4
NG → See step 22

OK: Go to next step
CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - MOTOR RESOLVER). Refer to PROCEDURE - Step 3
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step
CHECK MOTOR RESOLVER. Refer to PROCEDURE - Step 4
NG → See step 20

OK: Go to next step
CHECK INVERTER WITH CONVERTER ASSEMBLY (MOTOR CABLE CONNECTION CONDITION). Refer to PROCEDURE - Step 4
NG → TIGHTEN TO SPECIFIED TORQUE

OK: Go to next step
CHECK INVERTER WITH CONVERTER ASSEMBLY (GENERATOR CABLE CONNECTION CONDITION). Refer to PROCEDURE - Step 5
NG → TIGHTEN TO SPECIFIED TORQUE

OK: Go to next step
CHECK HYBRID VEHICLE TRANSAXLE ASSEMBLY (MG1). Refer to PROCEDURE - Step 6
NG → See step 24

OK: Go to next step
CHECK HYBRID VEHICLE TRANSAXLE ASSEMBLY (MG2). Refer to PROCEDURE - Step 7
NG → See step 24

OK: Go to next step
CHECK CONNECTOR CONNECTION CONDITION (GENERATOR RESOLVER CONNECTOR). Refer to PROCEDURE - Step 5
NG → CONNECT SECURELY

OK: Go to next step
CHECK CONNECTOR CONNECTION CONDITION (MOTOR RESOLVER CONNECTOR). Refer to PROCEDURE - Step 5
NG → CONNECT SECURELY

OK: Go to next step
CHECK INVERTER WITH CONVERTER ASSEMBLY (HIGH VOLTAGE CONNECTOR CONNECTION CONDITION). Refer to PROCEDURE - Step 13
NG → CONNECT SECURELY

OK: Go to next step
CHECK SERVICE PLUG GRIP. Refer to PROCEDURE - Step 14
NG → REPLACE SERVICE PLUG GRIP

OK: Go to next step
CHECK SERVICE PLUG GRIP. Refer to PROCEDURE - Step 15
NG → REPLACE SERVICE PLUG GRIP

OK: Go to next step
CHECK CONDITION OF FRAME WIRE CONNECTION(S) (HV RELAY ASSEMBLY SIDE). Refer to PROCEDURE - Step 5
NG → TIGHTEN TO SPECIFIED TORQUE

OK: Go to next step
CHECK FRAME WIRE. Refer to PROCEDURE - Step 17
NG → See step 25

OK: Go to next step
INSPECT HV RELAY ASSEMBLY (SMRB). Refer to PROCEDURE - Step 18
NG → See step 26

OK: Go to next step
INSPECT HV RELAY ASSEMBLY (SMRG). Refer to PROCEDURE - Step 19
NG → See step 26

OK → See step 27
CHECK CONNECTOR CONNECTION CONDITION (MOTOR RESOLVER CONNECTOR). Refer to PROCEDURE - Step 5
NG → CONNECT SECURELY

OK: Go to next step
CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - MOTOR RESOLVER). Refer to PROCEDURE - Step 6
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK → See step 24
CHECK CONNECTOR CONNECTION CONDITION (GENERATOR RESOLVER CONNECTOR). Refer to PROCEDURE - Step 5
NG → CONNECT SECURELY

OK: Go to next step
CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - GENERATOR RESOLVER). Refer to PROCEDURE - Step 6
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK → See step 24
REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY. Refer to REMOVAL
REPLACE FRAME WIRE. Refer to REMOVAL
REPLACE HV RELAY ASSEMBLY. Refer to REMOVAL
REPLACE INVERTER WITH CONVERTER ASSEMBLY. Refer to REMOVAL