P1557

L110F HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P1557-887: DC / DC Converter Temperature Sensor Circuit
P1557-887 - DC / DC Converter Temperature Sensor Circuit

DESCRIPTION

HINT
Although the DTC title indicates the DC/DC converter, this DTC relates to the reactor temperature sensor in the inverter with converter assembly.





INSPECTION PROCEDURE

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:





B -- GO TO DTC CHART Hybrid Control System
A -- Continue to next step.

2. CHECK QUANTITY OF HV COOLANT P0A01

C -- CHECK FOR COOLANT LEAKS AND ADD COOLANT

B -- ADD HV COOLANT
A -- Continue to next step.

3. CHECK COOLANT HOSE P0A01

NG -- CORRECT THE PROBLEM
OK -- Continue to next step.

4. PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE WATER PUMP) P0A01

NG -- PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE WATER PUMP)
OK -- Continue to next step.

5. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE ELECTRIC COOLING FAN) P0A01

NG -- CHECK COOLING FAN SYSTEM Cooling Fan Circuit
OK -- Continue to next step.

6. CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR) P0A01

NG -- CONNECT SECURELY
OK -- Continue to next step.

7. INSPECT COOLING SYSTEM (FOR CLOGGING) P0A01

NG -- REPLACE MALFUNCTIONING PARTS

OK -- REPLACE INVERTER WITH CONVERTER ASSEMBLY Installation

8. PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE WATER PUMP) P0A01

NG -- CHECK FUSE (INV W/P)

OK -- ADD HV COOLANT

9. CHECK FUSE (INV W/P) P0A01

NG -- CHECK CONNECTOR CONNECTION CONDITION (WATER PUMP WITH MOTOR AND BRACKET ASSEMBLY CONNECTOR)
OK -- Continue to next step.

10. CHECK CONNECTOR CONNECTION CONDITION (WATER PUMP WITH MOTOR AND BRACKET ASSEMBLY CONNECTOR) P0A01

NG -- CONNECT SECURELY
OK -- Continue to next step.

11. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR) P0A01

NG -- CONNECT SECURELY
OK -- Continue to next step.

12. CHECK HARNESS AND CONNECTOR (WATER PUMP WITH MOTOR AND BRACKET ASSEMBLY) P0A01

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

13. CHECK WATER PUMP WITH MOTOR AND BRACKET ASSEMBLY P0A01

NG -- REPLACE WATER PUMP WITH MOTOR AND BRACKET ASSEMBLY Components

OK -- REPLACE HYBRID VEHICLE CONTROL ECU Components

14. CHECK CONNECTOR CONNECTION CONDITION (WATER PUMP WITH MOTOR AND BRACKET ASSEMBLY CONNECTOR) P0A01

NG -- CONNECT SECURELY
OK -- Continue to next step.

15. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR) P0A01

NG -- CONNECT SECURELY
OK -- Continue to next step.

16. CHECK HARNESS AND CONNECTOR (WATER PUMP WITH MOTOR AND BRACKET ASSEMBLY) P0A01

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

17. CHECK WATER PUMP WITH MOTOR AND BRACKET ASSEMBLY P0A01

NG -- REPLACE WATER PUMP WITH MOTOR AND BRACKET ASSEMBLY Components

OK -- REPLACE HYBRID VEHICLE CONTROL ECU Components