P0A9C

HYBRID BATTERY CONTROL: HYBRID BATTERY SYSTEM: P0A9C-123: Hybrid Battery Temperature Sensor "A"

DTC P0A9C-123 - Hybrid Battery Temperature Sensor "A"

DESCRIPTION

Refer to the circuit description for DTC P0A9D-123 P0A9D.

MONITOR DESCRIPTION

If the temperature indicated by the battery temperature sensor is lower than the standard level (open), or is higher than the standard level (short), the battery smart unit interprets this as a sensor malfunction. If the battery smart unit detects that HV battery temperature is out of a normal range or its value is abnormal, the hybrid vehicle control ECU will illuminate the MIL and set a DTC.

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

COMPONENT OPERATING RANGE

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0A1F-123 P0A1F-123, DTC P0A9D-123 P0A9D and DTC P0AAC-123 P0AAC.

INSPECTION PROCEDURE
CAUTION:
- Before inspecting the high-voltage system, 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 10 minutes before touching any of the high-voltage connectors or terminals.
HINT: Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

PROCEDURE

1. CHECK DTC OUTPUT (DTC P0A1F-123 IS OUTPUT)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
(d) Check if DTCs are output.
Result:
DTC P0A1F-123 is output.
YES -- GO TO INSPECTION PROCEDURE RELEVANT TO OUTPUT DTC
NO -- Continue to next step.
2. CHECK BATTERY TEMPERATURE SENSOR (BATTERY TEMPERATURE SENSOR 0 TO 3)
CAUTION: Be sure to wear insulated gloves.
(a) Remove the HV battery assembly. Removal

(b) Visually check the installation of the battery temperature sensors (0 to 3) through the exhaust duct installation hole.

OK:
The battery temperature sensors (0 to 3) are securely installed.
NOTE: Do not poke the battery temperature sensors with a stick or other objects when checking. Doing so may damage the sensors.

NG -- REPLACE HV BATTERY
OK -- Continue to next step.
3. CHECK HV BATTERY (BATTERY TEMPERATURE SENSOR)
CAUTION: Be sure to wear insulated gloves.

(a) For the malfunctioning battery temperature sensor(s) , measure the resistance according to the value(s) in the table below.
Thermistor No.:

Standard resistance:

(b) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for short):

NG -- REPLACE HV BATTERY
OK -- REPLACE BATTERY SMART UNIT