Up to 08/2009
HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM: P0C73-776: Motor Electronics Coolant Pump "A" Control Performance
P0C73-776 - Motor Electronics Coolant Pump "A" Control Performance
DESCRIPTION
The water pump with motor assembly transmits rotation speed information to the power management control ECU (HV CPU). The power management control ECU (HV CPU) monitors the speed and detects malfunctions.
MONITOR DESCRIPTION
The power management control ECU (HV CPU) monitors speed of the water pump with motor assembly. If there is an abnormality in speed, the power management control ECU (HV CPU) will illuminate the MIL and set a DTC.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
COMPONENT OPERATING RANGE
CONFIRMATION DRIVING PATTERN
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG) and turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the power switch off.
- Turn the power switch on (IG) and check that there are no abnormalities (abnormal sounds, coolant leaks, DTC output, etc).
- Turn the power switch on (READY) and turn the Techstream on. [A]
- Wait for 2 minutes or more.
- Enter the following menus: Powertrain / Hybrid Control / Trouble Codes. [B]
- Check that permanent DTCs are cleared.
- If the permanent DTCs are not cleared, perform a universal trip, and then check for permanent DTCs again.
HINT
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
If DTC P0A78-284, 286, P0A79-692, 696, P0A7A-322, 324, P0A94-553 or 557 is output, replace the inverter with converter assembly after this inspection.
PROCEDURE
1. CHECK QUANTITY OF HV COOLANT P0A01
C -- INSPECT FOR COOLANT LEAKS
B -- ADD HV COOLANT
A -- Continue to next step.
2. CHECK COOLANT HOSE P0A01
NG -- CORRECT THE PROBLEM
OK -- Continue to next step.
3. CHECK WATER PUMP WITH MOTOR ASSEMBLY
NOTICE:
Be sure to perform the inspection with the auxiliary battery voltage at 11 V or more.
HINT
When the auxiliary battery voltage is low, the water pump with motor assembly may not operate.
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Powertrain / Hybrid Control / Data List.
(d) Select Inverter W/P Revolution in the Data List.
(e) Read the Data List.
OK:
Inverter W/P Revolution is 625 rpm or less.
(f) Turn the power switch off.
NG -- CHECK CONNECTOR CONNECTION CONDITION (POWER MANAGEMENT CONTROL ECU CONNECTOR)
OK -- Continue to next step.
4. PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE WATER PUMP)
NOTICE:
Be sure to perform the inspection with the auxiliary battery voltage at 11 V or more.
HINT
When the auxiliary battery voltage is low, the water pump with motor assembly may not operate.
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Powertrain / Hybrid Control / Active Test / Activate the Water Pump.
(d) Select Inverter W/P Revolution in the Data List.
(e) While performing the "Activate the Water Pump" Active Test, check Inverter W/P Revolution in the Data List.
Result:
HINT
Perform the Active Test with the inverter coolant temperature between 5 to 149°F (-15 and 65°C).
(f) Turn the power switch off.
NG -- CHECK CONNECTOR CONNECTION CONDITION (POWER MANAGEMENT CONTROL ECU CONNECTOR)
OK -- Continue to next step.
5. CHECK HV COOLANT (CHECK FOR CONDITIONS THAT MAY HAVE CAUSED FREEZING) P0A01
B -- REPLACE HV COOLANT
A -- REPLACE WATER PUMP WITH MOTOR ASSEMBLY Components
6. ADD HV COOLANT
(a) Add coolant up to the high level in the reserve tank.
NEXT -- CHECK WATER PUMP WITH MOTOR ASSEMBLY
7. INSPECT FOR COOLANT LEAKS
(a) Diagnose and repair the coolant leak.
NEXT -- CHECK WATER PUMP WITH MOTOR ASSEMBLY
8. CORRECT THE PROBLEM
(a) Correct the coolant hose.
NEXT -- CHECK WATER PUMP WITH MOTOR ASSEMBLY
9. CHECK CONNECTOR CONNECTION CONDITION (POWER MANAGEMENT CONTROL ECU CONNECTOR) P0340
NG -- CONNECT SECURELY
OK -- Continue to next step.
10. CHECK CONNECTOR CONNECTION CONDITION (WATER PUMP WITH MOTOR ASSEMBLY CONNECTOR)
(a) Check the connection of the water pump with motor assembly connector.
OK:
The connector is connected securely and there are no contact problems.
NG -- CONNECT SECURELY
OK -- Continue to next step.
11. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - WATER PUMP WITH MOTOR)
(a) Disconnect connector A80 from the power management control ECU.
(b) Disconnect connector A73 from the water pump with motor assembly.
(c) Measure the resistance according to the value(s) in the table below.
Text in Illustration
Standard Resistance (Check for open):
Standard Resistance (Check for short):
(d) Connect the power management control ECU connector.
(e) Connect the water pump with motor assembly connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
12. CHECK POWER MANAGEMENT CONTROL ECU
(a) Connect the Techstream to the DLC3.
(b) Disconnect connector A73 from the water pump with motor assembly.
(c) Turn the power switch on (IG).
(d) Enter the following menus: Powertrain / Hybrid Control / ECU Data List.
(e) Select Inverter W/P Revolution in the Data List.
(f) Read the Data List.
OK:
Inverter W/P Revolution is 125 rpm or less.
(g) Connect the water pump with motor assembly connector.
(h) Turn the power switch off.
NG -- REPLACE POWER MANAGEMENT CONTROL ECU
OK -- Continue to next step.
13. PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVE THE WATER PUMP)
(a) Turn the power switch on (IG).
(b) While turning the power switch on (IG), check the waveform between the power management control ECU terminals.
Text in Illustration
OK:
Waveform duty ratio is between 3% and 9%.
(c) Turn the power switch off.
NG -- REPLACE POWER MANAGEMENT CONTROL ECU
OK -- REPLACE WATER PUMP WITH MOTOR ASSEMBLY Components
14. CONNECT SECURELY
(a) Connect the power management control ECU connectors securely.
NEXT -- CHECK WATER PUMP WITH MOTOR ASSEMBLY
15. CONNECT SECURELY
(a) Connect the water pump with motor assembly connector securely.
NEXT -- CHECK WATER PUMP WITH MOTOR ASSEMBLY
16. REPAIR OR REPLACE HARNESS OR CONNECTOR
(a) Repair or replace the wire harness or connector.
NEXT -- CHECK WATER PUMP WITH MOTOR ASSEMBLY
17. REPLACE POWER MANAGEMENT CONTROL ECU
(a) Replace the power management control ECU Components.
NEXT -- CHECK WATER PUMP WITH MOTOR ASSEMBLY
18. REPLACE POWER MANAGEMENT CONTROL ECU
(a) Replace the power management control ECU Components.
NEXT -- CHECK WATER PUMP WITH MOTOR ASSEMBLY
19. REPLACE HV COOLANT P0A01
NEXT -- Continue to next step.
20. CHECK WATER PUMP WITH MOTOR ASSEMBLY P0A01
NG -- REPLACE WATER PUMP WITH MOTOR ASSEMBLY Components
OK -- COMPLETED