DTC P0A51-174: Drive Motor "A" Current Sensor Circuit: 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 if DTCs are output.

Result

Result	Proceed to
P0A51-174 only is output.	A
Any of the following DTCs are also output.	B

DTC No.	Relevant Diagnosis
P0A60 (all INF codes)*1	Drive Motor "A" Phase V Current
P0A63 (all INF codes)*1	Drive Motor "A" Phase W Current
P0A78-113, 287, 505, 506	Drive Motor "A" Inverter Performance

HINT:

*1: If any INF codes are output for this DTC, refer to the corresponding diagnostic procedure.
P0A51-174 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.

Turn the power switch off.

B → See step 4

A: Go to next step

CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR) See step 4
NG → CONNECT SECURELY

OK → See step 3
REPLACE INVERTER WITH CONVERTER ASSEMBLY. Refer to COMPONENTS
GO TO DTC CHART (HYBRID CONTROL SYSTEM). Refer to DIAGNOSTIC TROUBLE CODE CHART