P0AF3-675

P310 HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P0AF3-675: Sensor of Rear Motor Inverter Temperature

DTC P0AF3-675 - Sensor of Rear Motor Inverter Temperature

DTC P0AF3-676 - Sensor of Rear Motor Inverter Temperature

DESCRIPTION

The MG ECU located in the inverter with converter assembly detects the temperature of the rear motor inverter using a temperature sensor built into the inverter with converter assembly. The inverter cooling system is the same as that for MG2 and MG1, and it operates independently of the engine cooling system. The characteristics of the rear motor inverter temperature sensor are the same as those of the boost converter temperature sensor P3227. The MG ECU uses signals from the rear motor inverter temperature sensor to check the effectiveness of the inverter cooling system. If necessary, the MG ECU will limit inverter output to help prevent inverter overheating. The MG ECU also detects malfunctions in the rear motor inverter temperature sensor and its wiring.







INSPECTION PROCEDURE
CAUTION:
- Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
- After disconnecting the service plug grip, wait for at least 5 minutes before touching any of the high-voltage connectors or terminals. After waiting for 5 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.
HINT: Waiting for at least 5 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

PROCEDURE

1. CHECK DTC OUTPUT
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (READY) and wait for 10 seconds or more.
(c) Select the following menu items: Power train / Hybrid Control / Trouble Codes.
(d) Check if DTCs are output.
Result:










B -- GO TO DTC CHART Diagnostic Trouble Code Descriptions
A -- Continue to next step.
2. CHECK QUANTITY OF HV COOLANT P0A01-725
C -- CHECK FOR COOLANT LEAKS AND ADD COOLANT
B -- ADD HV COOLANT
A -- Continue to next step.

3. CHECK COOLANT HOSE P0A01-725
NG -- CORRECT THE PROBLEM
OK -- Continue to next step.

4. CHECK CONNECTOR CONNECTION CONDITION (WATER PUMP WITH MOTOR AND BRACKET ASSEMBLY CONNECTOR) P0A01-725
NG -- CONNECT SECURELY
OK -- Continue to next step.

5. PERFORM ACTIVE TEST USING TECHSTREAM (WATER PUMP) P0A01-725
NG -- CHECK FUSE (INV-W/P)
OK -- Continue to next step.

6. PERFORM ACTIVE TEST USING TECHSTREAM (COOLING FAN) P0A01-725
NG -- CHECK COOLING FAN SYSTEM
OK -- Continue to next step.

7. CHECK CONNECTOR CONNECTION CONDITION (MG ECU CONNECTOR) P0A01-725
NG -- CONNECT SECURELY
OK -- REPLACE INVERTER WITH CONVERTER ASSEMBLY

8. CHECK FUSE (INV-W/P) P0A01-725
NG -- REPLACE FUSE (INV-W/P)
OK -- Continue to next step.

9. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - WATER PUMP) P0A01-725
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

10. CHECK HYBRID VEHICLE CONTROL ECU (IG)
(a) Connect the hybrid vehicle control ECU connector.
(b) Turn the power switch on (IG).





(c) Measure the voltage according to the value(s) in the table below.
Standard voltage:






NG -- INSPECT WATER PUMP WITH MOTOR AND BRACKET ASSEMBLY
OK -- Continue to next step.
11. CHECK HYBRID VEHICLE CONTROL ECU (READY)
(a) Turn the power switch on (READY).





(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:






NG -- REPLACE HYBRID VEHICLE CONTROL ECU
OK -- REPLACE WATER PUMP WITH MOTOR AND BRACKET ASSEMBLY
12. INSPECT WATER PUMP WITH MOTOR AND BRACKET ASSEMBLY
(a) Turn the power switch off.





(b) Disconnect the D35 hybrid vehicle control ECU connector.
(c) Turn the power switch on (IG).
(d) Measure the voltage according to the value(s) in the table below.
Standard voltage:






NG -- REPLACE WATER PUMP WITH MOTOR AND BRACKET ASSEMBLY
OK -- REPLACE HYBRID VEHICLE CONTROL ECU