P0A37-260

P112 HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P0A37-260: Generator Temperature Sensor Circuit Range / Performance

DTC P0A37-260 - Generator Temperature Sensor Circuit Range / Performance

DESCRIPTION

The No. 2 motor temperature sensor detects the temperature of the transaxle fluid. The resistance of the thermistor installed in the No. 2 motor temperature sensor varies with the changes in the transaxle fluid temperature. The construction in the No. 2 motor temperature sensor and how it is connected to the HV control ECU are the same as those of the No. 1 motor temperature sensor.
Based on the signal provided by the No. 2 motor temperature sensor, the HV control ECU limits the load to prevent the motor from overheating. Furthermore, the HV control ECU checks the No. 2 motor temperature sensor for a wiring malfunction and the sensor for a malfunction.






INSPECTION PROCEDURE

PROCEDURE

1. CHECK COOLANT HOSE
(a) Check that the hoses of the cooling system are not bent or clogged (refer to the cooling system).
OK:
The hoses of the cooling system are not bent or clogged
NG -- CORRECT TO NORMAL CONDITION
OK -- Continue to next step.

2. CHECK CONNECTOR CONNECTION CONDITION (WATER PUMP CONNECTOR AND SHORT CONNECTOR)




(a) Check the connection condition of the water pump connector.
OK:
Connector has been connected securely and there is no poor connection.




(b) Check the connection condition of the short connector.
OK:
Connector has been connected securely and there is no poor connection.
NG -- CONNECT SECURELY
OK -- Continue to next step.

3. CHECK WATER PUMP W/ MOTOR AND BRACKET ASSEMBLY
(a) Turn the power switch ON (IG).
(b) Check the operation of the water pump.
OK:
Coolant is sloshing in the reservoir tank
NG -- CHECK WATER PUMP W/ MOTOR AND BRACKET ASSEMBLY
OK -- Continue to next step.

4. CHECK TRANSAXLE FLUID LEVEL
(a) Check if the transaxle is filled with fluid to the specified level.
OK:
The transaxle is filled with fluid to the specified level
HINT: The No. 2 motor temperature sensor is unavailable as an individual service part. Therefore, when replacing it, the hybrid vehicle motor must be replaced.

NG -- REPAIR OIL LEAKAGE, OR REPLACE HYBRID VEHICLE TRANSAXLE
OK -- REPLACE HYBRID VEHICLE MOTOR ASSEMBLY
5. CHECK WATER PUMP W/ MOTOR AND BRACKET ASSEMBLY




(a) Remove the water pump w/ motor and bracket assembly.
(b) Connect the battery positive terminal to terminal 2 and the battery negative terminal to terminal 1.
(c) Check that the water pump w/ motor and bracket assembly operates properly.
NOTICE:
- Do not connect the positive and negative poles of the battery to the wrong terminals.
- Complete the check within 10 seconds of connection.

OK:
Water pump w/ motor and bracket assembly operates properly.
NG -- REPLACE WATER PUMP W/ MOTOR AND BRACKET ASSEMBLY
OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR (WATER PUMP W/MOTOR AND BRACKET ASSEMBLY POWER SOURCE CIRCUIT)