2011 INFINITI QX56 heating

B2471 SYS HEAT PROTC ASSBC-51
< DTC/CIRCUIT DIAGNOSIS >
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B2471 SYS HEAT PROTC AS
DescriptionINFOID:0000000006237927
When fastening and unfastening seat belt or opening and cl osing door is repeated continuously for a short
period of time, the system temporar ily deactivates the retracting function of seat belt to prevent excessive
heating. The system recovers automatically.
DTC LogicINFOID:0000000006237928
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.SELF-DIAGNOSIS WITH PRE-CRASH SEAT BELT CONTROL UNIT
1. Turn ignition switch ON.
2. Check “Self-diagnostic result” with CONSULT-III.
Is DTC detected?
YES >> Refer to SBC-51, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006237929
1.CHECK THE VEHICLE CONDITION WITH CONSULT-III DATA MONITOR
1. Check “HEAT PROTC RH” in “DATA MONITOR” with CONSULT-III.
2. Wait until “OFF” appears.
3. Perform the “self-diagnosis results” wit h CONSULT-III, after performing the check.
4. Touch “ERASE”.
5. Perform DTC Confirmation Procedure. Refer to SBC-51, "
DTC Logic".
Is DTC B2471 displayed again?
YES >> GO TO 2.
NO >> INSPECTION END
2.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
>> INSPECTION END
DTC No. Self-diagnosis item DTC Detection Condition Possible causes
B2471 SYS HEAT PROTC AS Deactivate s to prevent excessive heating Belt retracting function activates continuously in
the short period of time
Revision: 2010 May2011 QX56

SYSTEMSE-19
< SYSTEM DESCRIPTION >
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*: System voltage is the voltage between the climate controlled seat control unit power source and ground.
NOTE:
When the ignition status changes to OFF during the fail-safe mode, the control unit shall enter the OFF condition. If the ignit ion is turned
ON, the system shall return to the standby mode. If the system en ters in the fail-safe mode again after performing ignition cycle, start the
diagnosis. HEAT or COOL switch input out of the specified range
 During the standby mode, heating or cooling states, if the rotary switch
input is 6% or less of the vehicle battery voltage, it stops all output and
enters the system OFF condition
 When the switch input returns to a value within the specified range, the system recovers automatically
System voltage out of range  If the system voltage at the climate controlled seat control unit falls out-
side of the 8.5 to 16.5 V operating range, it stops all output after a 500ms
time period.
 When the system voltage returns to the normal operating range (10.5-
15.5V with a 500ms hysteresis), the system recovers automatically.
Malfunction Malfunctioning condition
Revision: 2010 May2011 QX56

CLIMATE CONTROLLED SEAT CONTROL UNITSE-23
< ECU DIAGNOSIS INFORMATION >
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*: System voltage is the voltage between the climate controlled seat control unit power source and ground.
NOTE:
When the ignition status changes to OFF during the fail-safe mode, the control unit shall enter the OFF condition. If the ignit ion is turned
ON, the system shall return to the standby mode. If the system en ters in the fail-safe mode again after performing ignition cycle, start the
diagnosis. HEAT or COOL switch input out of the specified range
 During the standby mode, heating or cooling states, if the rotary switch
input is less than 6% of the vehicle battery voltage, it stops all output and
enters the system OFF condition
 When the switch input returns to a value within the specified range, the system recovers automatically
System voltage out of range  If the system voltage at the climate controlled seat control unit falls out-
side of the 8.5 to 16.5 V operating range, it stops all output after a 500ms
time period.
 When the system voltage returns to the normal operating range (10.5-
15.5V with a 500ms hysteresis), the system recovers automatically.
Malfunction Malfunctioning condition
Revision: 2010 May2011 QX56

COMPONENT PARTSST-7
< SYSTEM DESCRIPTION >
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SYSTEM DESCRIPTION
COMPONENT PARTS
Component Parts Locatio n (Heated Steering Wheel)INFOID:0000000006225576
Component Description (Heated Steering Wheel)INFOID:0000000006225577
Heated Steering WheelINFOID:0000000006225578
The heated steering wheel is activated by the pow er supply from the heated steering wheel relay.
1. Heated steering wheel relay 2. Heated steering wheel switch 3. Heated steering wheel
A. Engine room right side
JSGIA0824ZZ
Part name Reference/Function
Heated steering wheel Heating element Refer to ST-7, "
Heated Steering Wheel".
Thermostat
Heated steering wheel relay Refer to ST-8, "
Heated Steering Wheel Relay".
Heated steering wheel switch Timer Refer to ST-8, "
Heated Steering Wheel Switch".
Revision: 2010 May2011 QX56

ST-8
< SYSTEM DESCRIPTION >
COMPONENT PARTS
Furthermore, the heated steering wheel incorporates a heating element and a thermostat to control heated
steering wheel temperatures.
 Heating element: Heat is generated by the passage of an electric current.
 Thermostat: ON/OFF operation of power supply at a certain temperature.
Heated Steering Wheel SwitchINFOID:0000000006225579
 Controls the heated steering wheel relay and operates the heated steering wheel system.
The heated steering wheel switch incorporates a ti mer and turns OFF the heated steering wheel relay when
operating time reaches a certain time.
- Timer: ON/OFF operation of the heated st eering wheel relay at a certain time.
 Turns the indicator lamp ON when the system is activated.
Heated Steering Wheel RelayINFOID:0000000006225580
Operates the heated steering system with the control signal from the heated steering wheel switch.
Revision: 2010 May2011 QX56