Heater & Automatic Air Conditioning: Other Nissan Juke I

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER"

The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted. Information necessary to service the system safely is included in the " SRS AIRBAG " and " SEAT BELTS " of this Service Information.

PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS

Scheme 95

Multi Display Unit

1. Multi display unit integrates display and operation switches.
2. Operation of each switch (A/C operation signal) and setting status (A/C ECO setting signal and ECO mode signal) are transmitted to A/C auto amp. via CAN communication.
3. Operation status of air conditioning system is indicated in the display according to A/C display signal that is received from A/C auto amp.

A/C Auto Amp.

A/C auto amp. controls automatic air conditioning system by inputting and calculating signals from each sensor and each switch. A/C auto amp. has self-diagnosis function. Diagnosis of automatic air conditioning system can be performed quickly.

BCM

BCM transmits A/C ON signal and blower fan ON signal from A/C auto amp. to ECM via CAN communication line.

ECM

1. ECM, when receiving A/C ON signal and blower fan ON signal from BCM, transmits A/C compressor request signal to IPDM E/R via CAN communication according to status of the engine and refrigerant pressure.
2. ECM transmits engine coolant temperature signal to A/C auto amp. via CAN communication line.

IPDM E/R

A/C relay is integrated in IPDM E/R. IPDM E/R operates A/C relay when A/C compressor request signal is received from ECM via CAN communication line.

Ambient Sensor

Ambient sensor measures ambient air temperature. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases.

In-vehicle Sensor

In-vehicle sensor measures temperature of intake air that flows through aspirator to passenger room. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases.

Sunload Sensor

Sunload sensor measures sunload amount. This sensor converts sunload amount to voltage signal by photodiode and transmits to A/C auto amp.

Scheme 96

1. The refrigerant pressure sensor converts high-pressure side refrigerant pressure into voltage and outputs it to ECM.
2. ECM operates cooler cycle protection and cooling fan speed control according to voltage value that is input.

Magnet Clutch

Compressor is driven by the magnet clutch which is magnetized by electric power supply.

Scheme 97

CONTROL BY A/C AUTO AMP.

1. " «TEMPERATURE CONTROL»(ref-516424-S15847696322012120600000) "
2. " «AIR OUTLET CONTROL»(ref-516424-S08802770362012120600000) "
3. " «AIR FLOW CONTROL»(ref-516424-S34239747842012120600000) "
4. " «AIR INLET CONTROL»(ref-516424-S08855591412012120600000) "
5. " «COMPRESSOR CONTROL»(ref-516424-S33188918342012120600000) "
6. " «DOOR CONTROL»(ref-516424-S38640631472012120600000) "
7. " «ECO MODE CONTROL»(ref-516424-S05876097622012120600000) "
8. Correction for input value

Ambient temperature correction

1. The A/C auto amp. inputs the temperature detected with the ambient sensor as the ambient temperature.
2. Perform the correction of the temperature detected with the ambient sensor for air conditioning control.
3. Select and use the initial value of ambient temperature data depending on the engine coolant temperature when turning the ignition switch from OFF to ON. Use the detection temperature of the ambient sensor at low coolant temperature [less than approximately 56°C (133°F)]. Use the memory data (before the ignition switch is OFF) when the engine is warming up [approximately 56°C (133°F) or more].
4. Do not perform the correction of the ambient temperature when the detection temperature of the ambient temperature is less than approximately -20°C (-4°F).

Passenger room temperature correction

1. The A/C auto amp. inputs the temperature detected with the in-vehicle sensor as the passenger room temperature.
2. Perform the correction of the temperature detected with the in-vehicle sensor for air conditioning control.
3. The A/C auto amp. performs the correction so that the recognition passenger room temperature changes depending on the difference between the detected passenger room temperature and the recognition passenger room temperature. If the difference is large, the changing is early. The changing becomes slow as the difference becomes small.

Intake temperature correction

1. The A/C auto amp. inputs the temperature detected with the intake sensor as the intake temperature.
2. Perform the correction of the temperature detected with the intake sensor for air conditioning control.
3. The A/C auto amp. performs the correction so that the recognition intake temperature changes depending on the difference between the detected intake temperature and the recognition intake temperature. If the difference is large, the changing is early. The changing becomes slow as the difference becomes small.

Sunload amount correction

1. The A/C auto amp. inputs the sunload amount detected with the sunload sensor.
2. Perform the correction of the sunload amount detected with the sunload sensor for air conditioning control.
3. When the sunload amount suddenly changes, for example when entering a tunnel, perform the correction so that the recognition sunload amount of the A/C auto amp. changes slowly.

Set temperature correction

1. A/C auto amp. controls The A/C auto amp. performs the correction to the target temperature set by the temperature control switch so as to match the temperature felt by the passengers depending on the ambient temperature detected with the ambient sensor and controls it so that the interior air temperature is always the most suitable.

CONTROL BY BCM

1. " «COMPRESSOR CONTROL»(ref-516424-S33188918342012120600000) "

CONTROL BY ECM

1. " «COMPRESSOR CONTROL»(ref-516424-S33188918342012120600000) "
2. Cooling fan control. Refer to " «COOLING FAN CONTROL: SYSTEM DESCRIPTION»(ref-516395-S00955866362012120600000) ".

CONTROL BY IPDM E/R

1. " «COMPRESSOR CONTROL»(ref-516424-S33188918342012120600000) "
2. Cooling fan control. Refer to " «POWER CONTROL SYSTEM: SYSTEM DESCRIPTION»(ref-516417-S20573856082012120600000) ".

Scheme 98

1. When ignition switch is in the ON position, A/C auto amp. always automatically controls temperature regardless of air conditioner operational state.
2. A/C auto amp. calculates the target air mix door opening angle depending on set temperature, in-vehicle temperature, ambient temperature, and sunload.
3. Air mix door is controlled depending on the comparison of current air mix door opening angle and target air mix door opening angle.
4. Regardless of in-vehicle temperature, ambient temperature, and sunload, air mix door is fixed at the fully cold position when set temperature is 18°C (60°F), and at the fully hot position when set temperature is 32°C (90°F).

Scheme 99

1. While air outlet is in automatic control, A/C auto amp. selects the mode door position depending on a target air mix door angle and outlet air temperature calculated from sunload.
2. If ambient temperature is excessively low, D/F is selected to prevent windshield fogging when air outlet is set to FOOT.

STARTING FAN SPEED CONTROL

When blower motor is activated, A/C auto amp. gradually increases voltage of blower motor to prevent a sudden increase in discharge air flow. (T1 - T2 = approximately 8 seconds)

Note. Do not perform the starting air flow control when the discharge outlet is set to DEF.

Scheme 100

LOW COOLANT TEMPERATURE STARTING CONTROL

If the engine coolant temperature is 56°C (133°F) or less, to prevent a cold discharged air flow, A/C auto amp. suspends blower motor activation for the maximum 150 seconds depending on target air mix door opening angle. After this, voltage of blower motor is increased gradually, and blower motor is activated.

Scheme 101

HIGH IN- TEMPERATURE STARTING CONTROL

When evaporator temperature is high [intake air temperature sensor value is 35°C (95°F) or more], to prevent a hot discharged air flow, A/C auto amp. suspends blower motor activation for approximately 3 seconds so that evaporator is cooled by refrigerant.

Scheme 102

1. While air inlet is in automatic control, A/C auto amp. selects air inlet (fresh air intake, 20% fresh air intake, or recirculation) depending on set temperature, in-vehicle temperature, and ambient temperature.
2. Air inlet is fixed to 80% FRE, only when the conditions are satisfied as follows: Air inlet is FOOT or D/F Ambient temperature is 2°C (36°F) or less Maximum fan speed

Low Temperature Protection Control

When intake sensor detects that evaporator fin temperature is 2°C (36°F) or less, A/C auto amp. requests ECM to turn the compressor OFF, and stops the compressor.

When the air temperature returns to 3.5°C (38°F) or more, the compressor is activated.

Scheme 103

Compressor Protection Control at Pressure Malfunction

When the high-pressure side value that is detected by refrigerant pressure sensor is as per the following state, ECM requests IPDM E/R to turn A/C relay OFF and stops the compressor.

1. 3.12 MPa (31.82 kg/cm 2 , 452.4 psi) or more (When the engine speed is less than 1, 500 rpm)
2. 2.74 MPa (27.95 kg/cm 2 , 397.3 psi) or more (When the engine speed is 1, 500 rpm or more)
3. 0.14 MPa (1.43 kg/cm 2 , 20.3 psi) or less

Compressor Oil Circulation Control

When the engine starts while the engine coolant temperature is 56°C (133°F) or less, ECM activates the compressor for approximately 6 seconds and circulates the compressor oil once.

Air Conditioning Cut Control

When the engine condition is high load, ECM transmit A/C relay OFF request to IPDM E/R, and stops the compressor. Refer to " AIR CONDITIONING CUT CONTROL: SYSTEM DESCRIPTION ".

DOOR MOTOR CONTROL

1. A/C auto amp. receives the detection data from each sensor.
2. Intake door motor, when receiving control signal from A/C auto amp. moves intake door to the appropriate position based on the door position detection signal of each PBR (Potentio Balance Resistor).
3. Each motor of air mix and mode, when receiving drive signal from A/C auto amp., moves each door to the appropriate position according to drive signal.

Scheme 104

1. Stepping motor type motor is driven by 4 pieces of drive coil that are sequentially excited.
2. Direction of rotation is changeable by recomposing pattern of excitation.

Scheme 105

Scheme 106

AIR DISTRIBUTION

Models except for Canada

Models for Canada

CONTROL OUTLINE

During ECO mode operation, A/C auto amp. changes air flow and control characteristics of air inlet, within a range that may not spoil the comfort level, lowers operation ratio of compressor, and reduces the electrical load. This reduces engine load and improved fuel economy. Refer to the following items for details of each control.

Air Flow Control

1. A/C auto amp. increases voltage to power transistor gate compared to ordinary operation and reduces voltage to blower motor. This reduces air flow.
2. Since air flow is reduced, the amount of air that passes evaporator is reduced. Increase of evaporator temperature can be moderated. Evaporator temperature is easily shifted to temperature control range for low temperature protection control. Operation ratio of evaporator is reduced.
3. Since air flow is reduced, the electrical load is reduced. Alternator power output can be moderated.

Air Inlet Control

1. In the following conditions, A/C auto amp. controls air inlet and increases recirculation air mixing ratio compared to ordinary operation. Ambient temperature: 25°C (77°F) or more Temperature setting: Any temperature other than full cold [18°C (60°F)] or full hot [32°C (90°F)] Air outlet: In automatic control Air flow: In automatic control Air inlet: In automatic control or in fresh air intake mode by manual control A/C switch: ON
2. By increasing recirculation air mixing ratio, cooled air in passenger room is circulated in larger amount than during ordinary operation. Air temperature blowing to evaporator is maintained at a low level. Evaporator temperature increase can be moderated. Evaporator temperature is easily shifted to temperature control range for low temperature protection control. Operation ratio of evaporator is reduced.

FAIL-SAFE FUNCTION

If a communication error exists between the A/C auto amp. and multi display unit for 2 seconds or longer, air conditioning is controlled under the following conditions

A/C display: OFF

Set temperature: Setting before communication error occurs

Air outlet: Automatic control

Air flow: Automatic control

Air inlet: Fresh air intake (FRE)

A/C switch: ON

Scheme 107

1. Air conditioning system operation status is indicated on display in multi display unit. Indication of air conditioning system varies according to display mode of multi display unit. For changing procedure of display mode, refer to " «INTEGRATED CONTROL SYSTEM: SYSTEM DESCRIPTION»(ref-516457-S26960109242012120600000) ". In CLIMATE mode: Operation status of air conditioning system (setting temperature, air flow, and "AUTO" *1 ) is indicated on display when air conditioning system is turned ON. Setting temperature is indicated on display when MODE switch is pressed while air conditioning system is OFF. In D-MODE: Operation status of air conditioning system (setting temperature, A/C switch, and "AUTO" *2 ) is indicated on lower portion of display when air conditioning system is turned ON. Setting temperature is indicated on display when MODE switch is pressed while air conditioning system is OFF. NOTE: *1: AUTO is indicated when both air flow and air outlet are in automatic control. *2: Air Flow is indicated when air flow or air outlet is in manual control.

A/C Controller (Multi Display Unit)

Operation procedure of air conditioning system varies depending on display mode of multi display unit. For changing procedure of display mode, refer to " INTEGRATED CONTROL SYSTEM: SYSTEM DESCRIPTION ".

Scheme 108

1. In CLIMATE mode: All operations of air conditioning system are possible.

1. In D-MODE: The following switches and dial cannot be operated. A/C switch OFF switch MODE switch Fan control dial

CONSULT Function

CONSULT performs the following functions via CAN communication with A/C auto amp.

Note. Diagnosis should be performed with engine running. Door motor operation speeds become slower and NO results may be returned even for normal operation if battery voltage drops below 12 V during self-diagnosis.

DATA MONITOR

Input/output signal of A/C auto amp. can be checked.

Display item list

WORK SUPPORT

Setting change of each setting functions and automatic adjustment of components can be performed.

Note. When the battery cable is disconnected from the negative terminal or when the battery voltage becomes 10 V or less, the setting of WORK SUPPORT may be cancelled.

FREEZE FRAME DATA (FFD)

The BCM records the following vehicle condition at the time a particular DTC is detected, and displays on CONSULT.

Display Item List

CONSULT DATA MONITOR REFERENCE VALUES

Scheme 109

PHYSICAL VALUES

Terminal No. (Wire color) Description Condition Value + - Signal name Input/Output 2 (LG) 30 (B) In-vehicle sensor signal Input Ignition switch ON 0 - 4.8 V Output voltage varies with in-vehicle temperature 3 (V) 30 (B) Intake sensor signal Input Ignition switch ON 0 - 4.8 V Output voltage varies with evaporator fin temperature 4 (GR) 30 (B) Ambient sensor signal Input Ignition switch ON 0 - 4.8 V Output voltage varies with ambient temperature 5 (P) 30 (B) Sunload sensor signal Input Ignition switch ON 0 - 4.8 V Output voltage varies with sunload amount 6 (L) - CAN-H Input/Output - - 7 (P) - CAN-L Input/Output - - 8 (W) 30 (B) Intake door motor PBR power supply Output Ignition switch ON 4.8 - 5.2 V 9 (P) 30 (B) A/C auto amp. connection recognition signal Output Ignition switch ON 11 - 14 V 10 (R) 30 (B) Sensor ground - Ignition switch ON 0 - 0.1 V 11 (SB) 30 (B) Ignition power supply Input Ignition switch ON 11 - 14 V 12 (Y) 30 (B) Battery power supply Input Ignition switch OFF 11 - 14 V 13 (GR) 30 (B) Power transistor control signal Output Ignition switch ON Blower motor: 1st speed (manual) 14 (LG) 30 (B) Blower fan ON signal Output Ignition switch ON Blower motor: OFF Ignition switch ON Blower motor: ON 15 (Y) 30 (B) A/C ON signal Output Ignition switch ON A/C switch: OFF (A/C indicator: OFF) Ignition switch ON A/C switch: ON (A/C indicator: ON) 17 (BR) 30 (B) A/MIX drive 4 Air mix door motor drive signal Output Ignition switch ON Right after the temperature control dial operation 18 (GR) 30 (B) A/MIX drive 3 19 (W) 30 (B) A/MIX drive 2 20 (L) 30 (B) A/MIX drive 1 21 (G) 30 (B) Ignition power supply Input Ignition switch ON 11 - 14 V 22 (SB) 30 (B) Intake door motor PBR feedback signal Input Ignition switch ON Intake switch: REC 0.2 - 0.8 V Ignition switch ON Intake switch: FRE 4.2 - 4.8 V 30 (B) Ground Ground - Ignition switch ON 0 - 0.1 V 35 (G) 30 (B) REC Intake door motor drive signal Output Ignition switch ON Intake switch: FRE --> REC 9.5 - 13.5 V Ignition switch ON Intake switch: REC --> FRE 0 - 1 V 36 (V) 30 (B) FRE Ignition switch ON Intake switch: REC --> FRE 9.5 - 13.5 V Ignition switch ON Intake switch: FRE --> REC 0 - 1 V 37 (R) 30 (B) MODE drive 4 Mode door motor drive signal Output Ignition switch ON Right after the MODE switch operation 38 (P) 30 (B) MODE drive 3 39 (Y) 30 (B) MODE drive 2 40 (V) 30 (B) MODE drive 1

Scheme 110

Scheme 111

Scheme 112

Scheme 113

Scheme 114

If a communication error exists between the A/C auto amp. and multi display unit for 2 seconds or longer, air conditioning is controlled under the following conditions

List of ECU Reference

DETAILED FLOW

1. GET INFORMATION FOR SYMPTOM Get detailed information from the customer about the symptom (the condition and the environment when the incident/malfunction occurs). Check operation condition of the function that is malfunctioning. GO TO 2.
2. CHECK DTC Check DTC. Perform the following procedure if DTC is detected. Record DTC and freeze frame data (Print them out using CONSULT.) Erase DTC. Study the relationship between the cause detected by DTC and the symptom described by the customer. Check related service bulletins for information. Are any symptoms described and any DTC detected? Symptom is described, DTC is detected >> GO TO 3. Symptom is described, DTC is not detected >> GO TO 4 . Symptom is not described, DTC is detected >> GO TO 5 .
3. CONFIRM THE SYMPTOM Try to confirm the symptom described by the customer. Also study the normal operation and fail-safe related to the symptom. Verify relation between the symptom and the condition when the symptom is detected. GO TO 5 .
4. CONFIRM THE SYMPTOM Try to confirm the symptom described by the customer. Verify relation between the symptom and the condition when the symptom is detected. GO TO 6 .
5. PERFORM DTC CONFIRMATION PROCEDURE Perform DTC CONFIRMATION PROCEDURE for the detected DTC, and then check that DTC is detected again. At this time, always connect CONSULT to the vehicle, and check self diagnostic results in real time. If two or more DTCs are detected, refer to DTC INSPECTION PRIORITY CHART, and determine trouble diagnosis order. NOTE: Freeze frame data is useful if the DTC is not detected. Perform Component Function Check if DTC CONFIRMATION PROCEDURE is not included on Service Manual. This simplified check procedure is an effective alternative though DTC cannot be detected during this check. If the result of Component Function Check is NG, it is the same as the detection of DTC by DTC CONFIRMATION PROCEDURE. Is DTC detected? YES: GO TO 7 . NO: Check according to " «INTERMITTENT INCIDENT»(ref-516389-S36169925192012120600000) ".
6. DETECT MALFUNCTIONING SYSTEM BY SYMPTOM DIAGNOSIS Detect malfunctioning system according to SYMPTOM DIAGNOSIS based on the confirmed symptom in step 4 , and determine the trouble diagnosis order based on possible causes and symptom. Is the symptom described? YES: GO TO 7. NO: Monitor input data from related sensors or check voltage of related module terminals using CONSULT.
7. DETECT MALFUNCTIONING PART BY DIAGNOSIS PROCEDURE Inspect according to Diagnosis Procedure of the system. Is malfunctioning part detected? YES: GO TO 8. NO: Check according to " «INTERMITTENT INCIDENT»(ref-516389-S36169925192012120600000) ".
8. REPAIR OR REPLACE THE MALFUNCTIONING PART Repair or replace the malfunctioning part. Reconnect parts or connectors disconnected during Diagnosis Procedure again after repair and replacement. Check DTC. If DTC is detected, erase it. GO TO 9.
9. FINAL CHECK When DTC is detected in step 2 , perform DTC CONFIRMATION PROCEDURE again, and then check that the malfunction is repaired securely. When symptom is described by the customer, refer to confirmed symptom in step 3 or 4 , and check that the symptom is not detected. Is DTC detected and does symptom remain? YES-1: DTC is detected: GO TO 7 . YES-2: Symptom remains: GO TO 4 . NO: Before returning the vehicle to the customer, always erase DTC.

Work Procedure

The purpose of the operational check is to check that the individual system operates normally.

Check condition: Engine running at normal operating temperature.

1. CHECK MEMORY FUNCTION Set temperature to 32°C (90°F) by operating the temperature control dial. Press OFF switch. Turn ignition switch OFF. Turn ignition switch ON. Press AUTO switch. Check that set temperature is maintained. Is the inspection result normal? YES: GO TO 2. NO: GO TO 10 .
2. CHECK AIR FLOW Start engine. Operate fan control dial. Check that air flow changes. Check operation for all fan speeds. Is the inspection result normal? YES: GO TO 3. NO: GO TO 10 .
3. CHECK AIR OUTLET Operate fan control dial to set the fan speed to maximum speed. Operate MODE switch and DEF switch. Check that air outlets change according to each indicated air outlet by placing a hand in front of the air outlets. Refer to " «SYSTEM DESCRIPTION»(ref-516438-S26612224702012120600000) ". Is the inspection result normal? YES: GO TO 4. NO: GO TO 10 .
4. CHECK AIR INLET Press intake switch to set the air inlet to recirculation. [Intake switch indicator (RECIRCULATE side) turns ON.] Listen to intake sound and confirm air inlets change. Press intake switch again to set the air inlet to fresh air intake. [Intake switch indicator (RECIRCULATE side) turns OFF and (FRESH AIR side) turns ON.] Listen to intake sound and confirm air inlets change. Is the inspection result normal? YES: GO TO 5. NO: GO TO 10 .
5. CHECK COMPRESSOR Press A/C switch. The A/C switch indicator is turns ON. Check visually and by sound that the compressor operates. Press A/C switch again The A/C switch indicator is turns OFF. Check that compressor stops. Is the inspection result normal? YES: GO TO 6. NO: GO TO 10 .
6. CHECK DISCHARGE AIR TEMPERATURE Operate temperature control dial. Check that discharge air temperature changes. Is the inspection result normal? YES: GO TO 7. NO: GO TO 10 .
7. CHECK TEMPERATURE DECREASE Operate compressor. Operate temperature control dial and lower the set temperature to 18°C (60°F). Check that cool air blows from the air outlets. Is the inspection result normal? YES: GO TO 8. NO: GO TO 10 .
8. CHECK TEMPERATURE INCREASE Operate temperature control dial and raise the set temperature to 32°C (90°F). Check that warm air blows from the air outlets. Is the inspection result normal? YES: GO TO 9. NO: GO TO 10 .
9. CHECK AUTO MODE Press AUTO switch to confirm that "AUTO" is indicated on the display. Operate temperature control dial to check that air outlet or air flow changes (the air outlet or air flow varies depending on the ambient temperature, in-vehicle temperature, set temperature, and etc.). Is the inspection result normal? YES: INSPECTION END NO: GO TO 10.
10. CHECK SELF-DIAGNOSIS WITH CONSULT Perform self-diagnosis with CONSULT. Check that any DTC is detected. Is any DTC detected? YES: Refer to " «DTC INDEX»(ref-516424-S41603291392012120600000) " and perform the appropriate diagnosis. NO: GO TO 11.
11. CHECK FAIL-SAFE ACTIVATION Check that symptom is applied to the fail-safe activation. Refer to " «FAIL-SAFE»(ref-516424-S21066148662012120600000) ". Refer to " «SYMPTOM TABLE»(ref-516424-S30747998252012120600000) " and perform the appropriate diagnosis.

HOW TO SET

With CONSULT

Perform "TEMP SET CORRECT" of HVAC work support item.

Note. When -3.0°C (-6°F) is corrected on the temperature setting set as 25.0°C (77°F) the temperature controlled by A/C auto amp. is 25.0°C (77°F) -3.0°C (-6°F) = 22.0°C (72°F) and the temperature becomes lower than the temperature setting. When the battery cable is disconnected from the negative terminal or when the battery voltage becomes 10 V or less, the setting of the difference between the set temperature and control temperature may be cancelled.

With CONSULT

Perform the "REC MEMORY SET" of HVAC work support item.

Note. When the battery cable is disconnected from the negative terminal or when the battery voltage becomes 10 V or less, the setting of the REC memory function may be cancelled.

With CONSULT

Perform the "FRE MEMORY SET" of HVAC work support item.

Note. When the battery cable is disconnected from the negative terminal or when the battery voltage becomes 10 V or less, the setting of the FRE memory function may be cancelled.

Perform the "BLOW SET" of HVAC work support item.

Note. When the battery cable is disconnected from the negative terminal or when the battery voltage becomes 10 V or less, the setting of the discharge air mix ratio in FOOT mode may be cancelled.

1. PERFORM DOOR MOTOR STARTING POSITION RESET With CONSULT Turn ignition switch ON. Select "Door Motor Starting Position Reset" in "ACTIVE TEST" mode of "HVAC" using CONSULT. Touch "Start" and wait a few seconds. Make sure the "COMPLETED" is displayed on CONSULT screen. INSPECTION END

Component Function Check

1. CHECK A/C ON SIGNAL With CONSULT Turn ignition switch ON. Operate blower motor. Select "AIR CONDITIONER" of "BCM" using CONSULT. Select "AIR COND SW" in "DATA MONITOR" mode. Check A/C ON signal when the A/C switch is operated. Monitor item Condition Status AIR COND SW A/C switch ON (A/C indicator: ON) On OFF (A/C indicator: OFF) Off Is the inspection result normal? YES: INSPECTION END NO: Refer to " «DIAGNOSIS PROCEDURE»(ref-516424-S17325944232012120600000) ".

1. CHECK BLOWER FAN ON SIGNAL With CONSULT Turn ignition switch ON. Select "AIR CONDITIONER" of "BCM" using CONSULT. Select "FAN ON SIG" in "DATA MONITOR" mode. Check blower fan ON signal when the fan control dial is operated. Monitor item Condition Status FAN ON SIG Blower motor ON On OFF OFF Is the inspection result normal? YES: INSPECTION END NO: Refer to " «DIAGNOSIS PROCEDURE»(ref-516424-S39381989852012120600000) ".

Scheme 115

1. CHECK BLOWER FAN ON SIGNAL Turn ignition switch OFF. Disconnect A/C auto amp. harness connector. Turn ignition switch ON. Check output waveform between A/C auto amp. and ground with using oscilloscope. + - Output waveform A/C auto amp. Connector Terminal M50 14 Ground Is the inspection result normal? YES: Replace A/C auto amp. Refer to " «REMOVAL AND INSTALLATION»(ref-516424-S19583343652012120600000) ". NO: GO TO 2.
2. CHECK BLOWER FAN ON SIGNAL CIRCUIT FOR OPEN Turn ignition switch OFF. Disconnect BCM connector. Check continuity A/C auto amp. harness connector and BCM harness connector. A/C auto amp. BCM Continuity Connector Terminal Connector Terminal M50 14 M68 28 Existed Is the inspection result normal? YES: GO TO 3. NO: Repair harness or connector.
3. CHECK BLOWER FAN ON SIGNAL CIRCUIT FOR SHORT Check continuity between A/C auto amp. harness connector and ground. A/C auto amp. - Continuity Connector Terminal M50 14 Ground Not existed Is the inspection result normal? YES: Replace BCM. Refer to " «REMOVAL AND INSTALLATION»(ref-516421-S18255733352012120600000) ". NO: Repair harness or connector.

Scheme 116

1. CHECK FUSE Turn ignition switch OFF. Check following fuses. 10A fuse [No. 15, located in fuse block (J/B)] 15A fuses [Nos. 14 and 16, located in fuse block (J/B)] NOTE: Refer to " «FUSE, CONNECTOR AND TERMINAL ARRANGEMENT»(ref-516406-S25916235262012120600000) ". Is the inspection result normal? YES: GO TO 2. NO: Replace the blown fuse after repairing the affected circuit if a fuse is blown.
2. CHECK BLOWER MOTOR POWER SUPPLY Disconnect blower motor connector. Turn ignition switch ON. Check voltage between blower motor harness connector and ground. + - Voltage (Approx.) Blower motor Connector Terminal M39 1 Ground Battery voltage Is the inspection result normal? YES: GO TO 4 . NO: GO TO 3.
3. CHECK BLOWER RELAY Turn ignition switch OFF. Check blower relay. Refer to " «COMPONENT INSPECTION (BLOWER RELAY)»(ref-516424-S41019968192012120600000) ". Is the inspection result normal? YES: Repair harness or connector between blower motor and fuse. NO: Replace blower relay.
4. CHECK BLOWER MOTOR CONTROL CIRCUIT Turn ignition switch OFF. Connect blower motor connector. Disconnect power transistor connector. Turn ignition switch ON. Check voltage between power transistor harness connector and ground. + - Voltage (Approx.) Power transistor Connector Terminal M344 1 Ground Battery voltage Is the inspection result normal? YES: GO TO 6 . NO: GO TO 5.
5. CHECK BLOWER MOTOR CONTROL CIRCUIT FOR OPEN Turn ignition switch OFF. Disconnect blower motor connector. Check continuity between power transistor harness connector and blower motor harness connector. Power transistor Blower motor Continuity Connector Terminal Connector Terminal M344 1 M39 2 Existed Is the inspection result normal? YES: Replace blower motor. Refer to " «REMOVAL AND INSTALLATION»(ref-516438-S18287374322012120600000) ". NO: Repair harness or connector.
6. CHECK A/C AUTO AMP. IGNITION POWER SUPPLY Turn ignition switch OFF. Disconnect A/C auto amp. Turn ignition switch ON. Check voltage between A/C auto amp. harness connector and ground. + - Voltage (Approx.) A/C auto amp. Connector Terminal M50 21 Ground Battery voltage Is the inspection result normal? YES: GO TO 7. NO: Repair harness or connector between A/C auto amp. and fuse.
7. CHECK POWER TRANSISTOR IGNITION POWER SUPPLY Check voltage between power transistor harness connector and ground. + - Voltage (Approx.) Power transistor Connector Terminal M344 4 Ground Battery voltage Is the inspection result normal? YES: GO TO 8. NO: Repair harness or connector between power transistor and fuse.
8. CHECK POWER TRANSISTOR GROUND CIRCUIT FOR OPEN Turn ignition switch OFF. Check continuity between power transistor harness connector and ground. Power transistor - Continuity Connector Terminal M344 3 Ground Existed Is the inspection result normal? YES: GO TO 9. NO: Repair harness or connector.
9. CHECK POWER TRANSISTOR CONTROL SIGNAL Connect blower motor connector and A/C auto amp. connector. Turn ignition switch ON. Set air outlet to VENT. Change fan speed from 1st - 7th, and check duty ratios between blower motor harness connector and ground by using an oscilloscope. NOTE: Calculate the drive signal duty ratio as shown in the figure. T2 = Approx. 1.6 ms + - Condition Duty ratio (Approx.) Output waveform Power transistor Connector Terminal Fan speed (manual) Air outlet: VENT M344 2 Ground 1st 26% 2nd 34% 3rd 41% 4th 51% 5th 62% 6th 73% 7th 82% Is the inspection result normal? YES: Replace power transistor. Refer to " «REMOVAL AND INSTALLATION»(ref-516424-S17699517372012120600000) ". NO: GO TO 10.
10. CHECK POWER TRANSISTOR CONTROL SIGNAL CIRCUIT FOR OPEN Turn ignition switch OFF. Disconnect power transistor connector and A/C auto amp. connector. Check continuity between power transistor harness connector and A/C auto amp. harness connector. Power transistor A/C auto amp. Continuity Connector Terminal Connector Terminal M344 2 M50 13 Existed Is the inspection result normal? YES: GO TO 11. NO: Repair harness or connector.
11. CHECK POWER TRANSISTOR CONTROL SIGNAL CIRCUIT FOR SHORT Check continuity between power transistor harness connector and ground. Power transistor - Continuity Connector Terminal M344 2 Ground Not existed Is the inspection result normal? YES: Replace A/C auto amp. Refer to " «REMOVAL AND INSTALLATION»(ref-516424-S19583343652012120600000) ". NO: Repair harness or connector.

1. CHECK MAGNET CLUTCH OPERATION Perform auto active test of IPDM E/R. Refer to " «DIAGNOSIS DESCRIPTION»(ref-516417-S42167304602012120600000) ". Does it operate normally? YES: INSPECTION END NO: Refer to " «DIAGNOSIS PROCEDURE»(ref-516424-S01558371222012120600000) ".

Exploded View

Refer to " EXPLODED VIEW (AUTOMATIC AIR CONDITIONING) ".

Refer to " EXPLODED VIEW ".