Up to 08/2009
HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM: P314A-828: Inverter Coolant Pump Speed Signal
P314A-828 - Inverter Coolant Pump Speed Signal
DESCRIPTION
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 (READY) and after a few seconds, turn the power switch off. [A]
- Repeat [A] 3 times. [B]
- Turn the power switch on (IG) and turn the Techstream on.
- Enter the following menus: Powertrain / Hybrid Control / Trouble Codes. [C]
- Check that permanent DTCs are cleared.
- If the permanent DTCs are not cleared, perform the 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. 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) Perform the Activate the Water Pump Active Test.
(e) Touch the water pump with motor assembly and check that it is operating (vibrating).
OK:
The water pump is operating (vibrating).
(f) Turn the power switch off.
NG -- CHECK FUSE (INV W/P)
OK -- Continue to next step.
2. CHECK CONNECTOR CONNECTION CONDITION (POWER MANAGEMENT CONTROL ECU CONNECTOR) P0340
NG -- CONNECT SECURELY
OK -- Continue to next step.
3. CHECK CONNECTOR CONNECTION CONDITION (WATER PUMP WITH MOTOR ASSEMBLY CONNECTOR) P0C73
NG -- CONNECT SECURELY
OK -- Continue to next step.
4. 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:
(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.
5. CHECK POWER MANAGEMENT CONTROL ECU
(a) Disconnect connector A73 from the water pump with motor assembly.
(b) Turn the power switch on (IG).
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
(d) Turn the power switch off.
(e) Connect the water pump with motor assembly connector.
NG -- REPLACE POWER MANAGEMENT CONTROL ECU Components
OK -- REPLACE WATER PUMP WITH MOTOR ASSEMBLY Components
6. CHECK FUSE (INV W/P)
(a) Remove the INV W/P fuse from the engine room relay block No. 2.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
(c) Install the INV W/P fuse.
NG -- CHECK CONNECTOR CONNECTION CONDITION (WATER PUMP WITH MOTOR ASSEMBLY CONNECTOR)
OK -- Continue to next step.
7. CHECK CONNECTOR CONNECTION CONDITION (WATER PUMP WITH MOTOR ASSEMBLY CONNECTOR) P0C73
NG -- CONNECT SECURELY
OK -- Continue to next step.
8. CHECK HARNESS AND CONNECTOR (WATER PUMP WITH MOTOR ASSEMBLY CIRCUIT)
(a) Remove the INV W/P fuse from the engine room relay block No. 2.
(b) Remove the IGCT MAIN relay from the engine room relay block No. 2.
(c) Disconnect connector A80 from the power management control ECU.
(d) Disconnect connector A73 from the water pump with motor assembly.
(e) Measure the resistance according to the value(s) in the table below.
Text in Illustration
Standard Resistance:
NOTICE:
Do not apply excessive force when using the probes of the tester to perform the inspection. If excessive force is used, the terminals will be damaged.
(f) Install the INV W/P fuse.
(g) Install the IGCT MAIN relay.
(h) Connect the power management control ECU connector.
(i) Connect the water pump with motor assembly connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE WATER PUMP WITH MOTOR ASSEMBLY Components
9. CHECK CONNECTOR CONNECTION CONDITION (WATER PUMP WITH MOTOR ASSEMBLY CONNECTOR) P0C73
NG -- CONNECT SECURELY
OK -- Continue to next step.
10. CHECK HARNESS AND CONNECTOR (WATER PUMP WITH MOTOR ASSEMBLY CIRCUIT)
(a) Remove the INV W/P fuse from the engine room relay block No. 2.
(b) Disconnect connector A73 from the water pump with motor assembly.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NOTICE:
Do not apply excessive force when using the probes of the tester to perform the inspection. If excessive force is used, the terminals will be damaged.
(d) Install the INV W/P fuse.
(e) Connect the water pump with motor assembly connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
11. REPLACE WATER PUMP WITH MOTOR ASSEMBLY
(a) Replace the water pump with motor assembly Components.
NEXT -- REPLACE FUSE (INV W/P)
12. CONNECT SECURELY
(a) Connect the water pump with motor assembly connector securely.
NEXT -- REPLACE FUSE (INV W/P)
13. REPAIR OR REPLACE HARNESS OR CONNECTOR
(a) Repair or replace the wire harness or connector.
NEXT -- REPLACE FUSE (INV W/P)