HYBRID CONTROL SYSTEM, Diagnostic DTC:P0A37-260, P0A3A-258

DTC Code	DTC Name
P0A37-260	Generator Temperature Sensor Circuit Range / Performance
P0A3A-258	Generator Temperature Sensor Circuit Intermittent

DESCRIPTION

The resistance of the thermistor built into the generator temperature sensor changes in accordance with changes in generator (MG1) temperature. The lower the generator (MG1) temperature, the higher the thermistor resistance. Conversely, the higher the generator (MG1) temperature, the lower the resistance.


*1	Resistance (kΩ)
*2	Temperature (°C (°F ))

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Warning Indicate
P0A37-260	Generator Temperature Sensor Circuit Range / Performance	Generator temperature sensor output does not increase in which the value should increase, or output does not decrease under conditions in which the value should decrease. (1 trip detection logic)	Hybrid vehicle transmission assembly (Generator temperature sensor)	Does not come on	Master Warning Light: Comes on
P0A3A-258	Generator Temperature Sensor Circuit Intermittent	Sudden change in generator temperature sensor output or hunting Unusual sudden change in generator temperature sensor output occurs and offset condition continues for a certain period of time, or unusual change in motor temperature sensor output occurs repeatedly. (1 trip detection logic)	Hybrid vehicle transmission assembly (Generator temperature sensor)	Does not come on	Master Warning Light: Comes on

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P0A37-260

Generator Temperature Sensor Circuit Range / Performance

Generator temperature sensor output does not increase in which the value should increase, or output does not decrease under conditions in which the value should decrease.

(1 trip detection logic)

Hybrid vehicle transmission assembly (Generator temperature sensor)

Does not come on

Master Warning Light:

Comes on

P0A3A-258

Generator Temperature Sensor Circuit Intermittent

Sudden change in generator temperature sensor output or hunting

Unusual sudden change in generator temperature sensor output occurs and offset condition continues for a certain period of time, or unusual change in motor temperature sensor output occurs repeatedly.

(1 trip detection logic)

Hybrid vehicle transmission assembly (Generator temperature sensor)

Does not come on

Master Warning Light:

Comes on

Related Data List
DTC No.	Data List
P0A37-260	Motor Temp No2
P0A3A-258	Motor Temp No2

CAUTION / NOTICE / HINT

Tech Tips

If DTC P0A37-260 is output, clear the DTCs, perform the following procedure, and check that the same DTC is not output after the repair.

Drive the vehicle (stop and go driving) on urban roads for approximately 5 minutes. If the Data List item "Motor Temp No2" shows both increases and decreases in temperature, suspected areas indicated by this DTC are not malfunctioning.

If DTC P0A3A-258 is output, clear the DTCs, perform the following procedure, and check that the same DTC is not output after the repair.

Turn the power switch on (READY) and wait for 30 seconds or more.
Drive the vehicle for approximately 5 minutes according to the freeze frame data items "Vehicle Spd", "Inverter Coolant Water Temperature", "Motor Temp No1" and "Motor Temp No2".

PROCEDURE

REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY

Click here

Tech Tips

The generator temperature sensor is not available as a supply part. If it requires replacement, replace the hybrid vehicle transmission assembly.

Result

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