Nissan Altima HL32 Hybrid. Manual - part 551
P0A9D-123, P0A9E-123
HBB-61
< COMPONENT DIAGNOSIS >
D
E
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H
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A
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HBB
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tery smart unit detects that the HV battery temperature is out of its normal range or its value is abnormal, the
hybrid vehicle control ECU will illuminate the MIL and set a DTC.
NOTE:
After confirming that a DTC is output, check “BATT TEMP 1 to 4” in “DATA MONITOR” mode with CONSULT-
III.
Diagnosis Procedure
INFOID:0000000004212275
1.
PRECONDITIONING
• 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-volt-
age system.
• After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage
connectors or terminals.
• Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with
converter assembly.
>> GO TO 2.
2.
CHECK FOR DTC (DTC P0A1F-123 IS OUTPUT)
1. Turn ignition switch ON.
2. Check DTC.
Is DTC P0A1F-123 detected?
YES
>> Go to Diagnosis Procedure relevant to output DTC.
NO
>> GO TO 3.
3.
CHECK CONNECTOR CONNECTION CONDITION (BATTERY TEMPERATURE SENSOR)
CAUTION:
Be sure to wear insulated gloves.
1. Turn ignition switch OFF.
2. Remove the service plug grip (Refer to
GI-24, "Precautions For High-Voltage System"
3. Remove the HV relay assembly (Refer to
HBB-105, "Removal and Installation"
4. Check the battery smart unit harness connectors connection.
OK or NG
OK
>> GO TO 4.
NG
>> Connect securely.
4.
CHECK HV BATTERY (BATTERY TEMPERATURE SENSOR)
CAUTION:
Be sure to wear insulated gloves.
1. Remove the battery smart unit (Refer to
HBB-101, "Removal and Installation"
).
2. Disconnect the battery smart unit harness connectors.
DTC No.
INF code
Trouble diagnosis name
DTC detecting condition
Possible cause
P0A9D
123
Hybrid Battery Temperature
Sensor “A” Circuit Low
When the temperature indicated by the
battery temperature sensor is lower
than a predetermined limit (open circuit)
or is higher than a predetermined limit
(short circuit) (1 trip detection)
• HV battery (Battery temperature
sensor)
• Battery smart unit
P0A9E
123
Hybrid Battery Temperature
Sensor “A” Circuit High
Displayed Temperature
Malfunction
-45
°C (-49°F) or less
Open or +B short circuit
95
°C (203°F) or more
GND short
The connectors are connected securely and there are no contact problems.