DTC P0A94-556: DC / DC Converter Performance [02/2014 - 11/2016]: Procedure

CHECK DTC OUTPUT (HYBRID CONTROL)

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

Check for DTCs.

Powertrain > Hybrid Control > Trouble Codes

Result

Result	Proceed to
P0A94-556 only is output, or DTCs except the ones in the table below are also output.	A
Any of the following DTCs are also output.	B

Relevant DTC
P0A1A (all INF codes)*1	Generator Control Module
P0A1B (all INF codes)*1	Drive Motor "A" Control Module
P0A1C (all INF codes)*1	Drive Motor "B" Control Module
P0A1D (all INF codes)*1	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
P0A45-669	Drive Motor "B" Position Sensor Circuit
P0A46-671	Drive Motor "B" Position Sensor Circuit Range / Performance
P0A47-670	Drive Motor "B" 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
P0A69 (all INF codes)*1	Drive Motor "B" Phase V Current
P0A6C (all INF codes)*1	Drive Motor "B" Phase W Current
P0A72 (all INF codes)*1	Generator Phase V Current
P0A75 (all INF codes)*1	Generator Phase W Current
P0A78-266, 267, 287, 505, 506, 586, 806, 807, 808	Drive Motor "A" Inverter Performance
P0A79-693, 694, 695, 812, 813, 814	Drive Motor "B" Inverter Performance
P0A7A-325, 517, 518, 809, 810, 811	Generator Inverter Performance
P0A94-585, 587, 589, 590	DC / DC Converter Performance
P0C76-523	Hybrid Battery System Discharge Time Too Long

HINT:

*1: If any INF codes are output for this DTC, refer to the corresponding diagnostic procedure.
P0A94-556 may be stored due to a malfunction which also causes DTCs in the preceding table to be stored. 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.

Turn the power switch off.

Result: 2

GO TO DTC CHART (HYBRID CONTROL SYSTEM). Refer to DIAGNOSTIC TROUBLE CODE CHART [02/2014 - 11/2015] Refer to DIAGNOSTIC TROUBLE CODE CHART [11/2015 - 11/2016]

Result: 1

See step 2

CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR)

Refer to PROCEDURE - Step 3

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: 3

CONNECT SECURELY

Result: 4

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result: 1

See step 3

CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - GENERATOR RESOLVER)
Refer to PROCEDURE - Step 3

Result

Proceed to

OK

NG

Result: 3

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result: 1

OK

See step 4
CHECK GENERATOR RESOLVER
Refer to PROCEDURE - Step 4

Result

Proceed to

OK

NG

Result: 3

NG

See step 11

Result: 1

OK

See step 5
CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - MOTOR RESOLVER)
Refer to PROCEDURE - Step 5

Result

Proceed to

OK

NG

Result: 3

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result: 1

OK

See step 6
CHECK MOTOR RESOLVER
Refer to PROCEDURE - Step 6

Result

Proceed to

OK

NG

Result: 3

NG

See step 9

Result: 1

OK

See step 7

Proceed to
OK
NG

Proceed to
OK
NG

Proceed to
OK
NG

Proceed to
OK
NG

CHECK CONNECTOR CONNECTION CONDITION (GENERATOR RESOLVER CONNECTOR)

Refer to PROCEDURE - Step 9

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: 2

CONNECT SECURELY

Result: 3

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result: 1

See step 8

CHECK CONNECTOR CONNECTION CONDITION (MOTOR RESOLVER CONNECTOR)

Refer to PROCEDURE - Step 10

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: 1

REPLACE INVERTER WITH CONVERTER ASSEMBLY. Refer to COMPONENTS [02/2014 - 11/2016]

Result: 2

CONNECT SECURELY

Result: 3

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK CONNECTOR CONNECTION CONDITION (MOTOR RESOLVER CONNECTOR)

Refer to PROCEDURE - Step 14

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: 2

CONNECT SECURELY

Result: 3

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result: 1

See step 10

INSPECT HYBRID VEHICLE TRANSAXLE ASSEMBLY (MOTOR RESOLVER)
Refer to PROCEDURE - Step 15

Result

Proceed to

OK

NG

Result: 1

OK

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result: 2

NG

REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY. Refer to COMPONENTS [02/2014 - 11/2015] Refer to COMPONENTS [11/2015 - 11/2016]

Proceed to
OK
NG

CHECK CONNECTOR CONNECTION CONDITION (GENERATOR RESOLVER CONNECTOR)

Refer to PROCEDURE - Step 16

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: 2

CONNECT SECURELY

Result: 3

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result: 1

See step 12

INSPECT HYBRID VEHICLE TRANSAXLE ASSEMBLY (GENERATOR RESOLVER)
Refer to PROCEDURE - Step 17

Result

Proceed to

OK

NG

Result: 1

OK

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result: 2

NG

REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY. Refer to COMPONENTS [02/2014 - 11/2015] Refer to COMPONENTS [11/2015 - 11/2016]