2007-2010 Nissan Qashqai Service & Repair Manual

HAC-1 VENTILATION, HEATER & AIR CONDITIONER C D E F G H J K L M SECTION HAC A B HAC N O P CONTENTS HEATER & AIR CONDITIONING CONTROL SYSTEM AUTOMATIC AIR CONDITIONER BASIC INSPECTION ................................... 5 DIAGNOSIS AND REPAIR WORKFLOW ......... 5 Work Flow ................................................................ 5 INSPECTION AND ADJUSTMENT .................... 6 Description & Inspection .......................................... 6 FUNCTION DIAGNOSIS ............................. 10 COMPRESSOR CONTROL FUNCTION ...........10 Description ............................................................. 10 Component Part Location ...................................... 10 Component’s role ................................................... 13 AUTOMATIC AIR CONDITIONER SYSTEM ....15 System Diagram ..................................................... 15 System Description ................................................ 15 Component Part Location ...................................... 21 Component Description .......................................... 24 CAN COMMUNICATION SYSTEM ...................26 System Description ................................................ 26 DIAGNOSIS SYSTEM (AUTO AMP.) ...............27 Diagnosis Description ............................................ 27 CONSULT-III Function ........................................... 31 DIAGNOSIS SYSTEM (BCM) ...........................33 COMMON ITEM ........................................................ 33 COMMON ITEM : CONSULT-III Function (BCM - COMMON ITEM) .................................................... 33 AIR CONDITIONER .................................................. 33 AIR CONDITIONER : CONSULT-III Function (BCM - AUTO AIR CONDITIONER) ...................... 33 PTC HEATER ........................................................... 34 PTC HEATER : CONSULT-III Function (BCM - PTC HEATER) ....................................................... 34 MODE DOOR CONTROL SYSTEM .................. 35 Description ..............................................................35 HIGH-LEVEL VENTILATOR DOOR CON- TROL SYSTEM ................................................. 37 Description ..............................................................37 AIR MIX DOOR CONTROL SYSTEM ............... 39 Description ..............................................................39 INTAKE DOOR CONTROL SYSTEM ............... 41 Description ..............................................................41 BLOWER MOTOR CONTROL SYSTEM .......... 43 Description ..............................................................43 MAGNET CLUTCH CONTROL SYSTEM ......... 45 Description ..............................................................45 PTC HEATER CONTROL SYSTEM ................. 46 Description ..............................................................46 COMPONENT DIAGNOSIS ........................ 47 MODE DOOR MOTOR ...................................... 47 Description ..............................................................47 Component Function Check .................................47 Diagnosis Procedure ..............................................47 HIGH-LEVEL VENTILATOR DOOR MOTOR ... 50 Description ..............................................................50 Component Function Check .................................50 Diagnosis Procedure ..............................................50 Component Inspection ............................................52 AIR MIX DOOR MOTOR ................................... 54 Description ..............................................................54 Component Function Check .................................54 Diagnosis Procedure ..............................................54 INTAKE DOOR MOTOR ................................... 59 Description ..............................................................59 Component Function Check .................................59

HAC-2 Diagnosis Procedure ............................................. 59 BLOWER MOTOR ............................................ 62 Description ............................................................. 62 Component Function Check ................................ 62 Diagnosis Procedure ............................................. 62 Component Inspection ........................................... 65 MAGNET CLUTCH ........................................... 66 Description ............................................................. 66 Component Function Check .................................. 66 Diagnosis Procedure ............................................. 66 Component Inspection ........................................... 70 PTC HEATER ................................................... 71 Description ............................................................. 71 Component Function Check .................................. 71 Diagnosis Procedure ............................................. 71 Component Inspection ........................................... 76 OAT SENSOR ................................................... 77 Description ............................................................. 77 Component Function Check ................................ 77 Diagnosis Procedure ............................................. 77 Component Inspection ........................................... 78 IN-VEHICLE SENSOR ...................................... 80 Description ............................................................. 80 Component Function Check ................................ 80 Diagnosis Procedure ............................................. 81 Component Inspection ........................................... 82 SUNLOAD SENSOR ........................................ 83 Description ............................................................. 83 Component Function Check ................................ 83 Diagnosis Procedure ............................................. 83 Component Inspection ........................................... 84 INTAKE SENSOR ............................................. 86 Description ............................................................. 86 Component Function Check ................................ 86 Diagnosis Procedure ............................................. 86 Component Inspection ........................................... 87 POWER SUPPLY AND GROUND CIRCUIT FOR AUTO AMP. .............................................. 89 Description ............................................................. 89 Component Function Check .................................. 89 Diagnosis Procedure ............................................. 89 ECU DIAGNOSIS ....................................... 91 ECM .................................................................. 91 HR16DE .................................................................... 91 HR16DE : Reference Value ................................... 91 MR20DE ................................................................... 91 MR20DE : Reference Value .................................. 92 K9K ........................................................................... 92 K9K : Reference Value .......................................... 92 BCM (BODY CONTROL MODULE) ................. 94 Reference Value .................................................... 94 AUTO AMP. ...................................................... 97 Reference Value .................................................... 97 Wiring Diagram — AIR CONDITIONER CON- TROL SYSTEM — ............................................... 100 SYMPTOM DIAGNOSIS ........................... 108 AIR CONDITIONER CONTROL ...................... 108 Diagnosis Chart By Symptom .............................. 108 INSUFFICIENT COOLING ............................... 109 Description ........................................................... 109 Inspection procedure ........................................... 109 INSUFFICIENT HEATING ............................... 111 Description ........................................................... 111 Inspection procedure ........................................... 111 NOISE .............................................................. 113 Description ........................................................... 113 Inspection procedure ........................................... 113 SELF-DIAGNOSIS CANNOT BE PER- FORMED .......................................................... 115 Description ........................................................... 115 Inspection procedure ........................................... 115 MEMORY FUNCTION DOES NOT OPERATE .. 116 Description ........................................................... 116 Inspection procedure ........................................... 116 PRECAUTION ........................................... 117 PRECAUTIONS ............................................... 117 Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TEN- SIONER" .............................................................. 117 Precaution Necessary for Steering Wheel Rota- tion After Battery Disconnect ............................... 117 Precaution for Procedure without Cowl Top Cover . 117 Working with HFC-134a (R-134a) ........................ 118 General Refrigerant Precaution ........................... 118 Refrigerant Connection ........................................ 118 Service Equipment ............................................... 121 COMPRESSOR ............................................... 123 General Precautions ............................................ 123 FLUORESCENT LEAK DETECTOR ............... 124 General Precautions ............................................ 124 MANUAL AIR CONDITIONER BASIC INSPECTION ................................. 125 DIAGNOSIS AND REPAIR WORKFLOW ....... 125 Work Flow ............................................................ 125 INSPECTION AND ADJUSTMENT ................. 126 Description & Inspection ...................................... 126

HAC-3 C D E F G H J K L M A B HAC N O P FUNCTION DIAGNOSIS ........................... 128 COMPRESSOR CONTROL FUNCTION ......... 128 Description ........................................................... 128 Component Part Location .................................... 128 Component’s role ................................................. 131 MANUAL AIR CONDITIONER SYSTEM ........ 133 System Description .............................................. 133 Component Part Location .................................... 135 Component Description ........................................ 138 DIAGNOSIS SYSTEM (BCM) ......................... 140 COMMON ITEM ...................................................... 140 COMMON ITEM : CONSULT-III Function (BCM - COMMON ITEM) .................................................. 140 AIR CONDITIONER ................................................ 140 AIR CONDITIONER : CONSULT-III Function (BCM - MANUAL AIR CONDITIONER) ............... 140 PTC HEATER ......................................................... 141 PTC HEATER : CONSULT-III Function (BCM - PTC HEATER) ..................................................... 141 HIGH-LEVEL VENTILATOR DOOR CON- TROL SYSTEM ............................................... 142 Description ........................................................... 142 INTAKE DOOR CONTROL SYSTEM ............. 143 Description ........................................................... 143 BLOWER MOTOR CONTROL SYSTEM ........ 144 Description ........................................................... 144 MAGNET CLUTCH CONTROL SYSTEM ....... 145 Description ........................................................... 145 PTC HEATER CONTROL SYSTEM ............... 146 Description ........................................................... 146 COMPONENT DIAGNOSIS ...................... 147 HIGH-LEVEL VENTILATOR DOOR MOTOR .. 147 Description ........................................................... 147 Component Function Check ............................... 147 Diagnosis Procedure ............................................ 147 Component Inspection ......................................... 149 INTAKE DOOR MOTOR ................................. 150 Description ........................................................... 150 Component Function Check ............................... 150 Diagnosis Procedure ............................................ 150 BLOWER MOTOR ........................................... 153 Description ........................................................... 153 Component Function Check ............................... 153 Diagnosis Procedure ............................................ 153 Component Inspection ......................................... 155 MAGNET CLUTCH .......................................... 157 Description ........................................................... 157 Component Function Check ................................. 157 Diagnosis Procedure ............................................ 157 Component Inspection .......................................... 161 PTC HEATER .................................................. 162 Description ............................................................ 162 Component Function Check ................................. 162 Diagnosis Procedure ............................................ 162 Component Inspection .......................................... 167 POWER SUPPLY AND GROUND CIRCUIT FOR HEATER CONTROL PANEL ................. 169 Description ............................................................ 169 Component Function Check ................................. 169 Diagnosis Procedure ............................................ 169 MANUAL AIR CONDITIONER SYSTEM ........ 171 Wiring Diagram — AIR CONDITIONER CON- TROL SYSTEM — ................................................ 171 ECU DIAGNOSIS ...................................... 181 ECM ................................................................. 181 HR16DE .................................................................. 181 HR16DE : Reference Value .................................. 181 MR20DE .................................................................. 181 MR20DE : Reference Value ................................. 182 K9K ......................................................................... 182 K9K : Reference Value ......................................... 182 BCM (BODY CONTROL MODULE) ............... 184 Reference Value ................................................... 184 SYMPTOM DIAGNOSIS ........................... 187 AIR CONDITIONER CONTROL ...................... 187 Diagnosis Chart By Symptom ............................... 187 INSUFFICIENT COOLING .............................. 188 Description ............................................................ 188 Inspection procedure ............................................ 188 INSUFFICIENT HEATING ............................... 189 Description ............................................................ 189 Inspection procedure ............................................ 189 NOISE .............................................................. 191 Description ............................................................ 191 Inspection procedure ............................................ 191 PRECAUTION ........................................... 193 PRECAUTIONS ............................................... 193 Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TEN- SIONER" .............................................................. 193 Precaution Necessary for Steering Wheel Rota- tion After Battery Disconnect ................................ 193 Precaution for Procedure without Cowl Top Cover .. 193 Working with HFC-134a (R-134a) ........................ 194

HAC-4 General Refrigerant Precaution ............................ 194 Refrigerant Connection ......................................... 194 Service Equipment ............................................... 197 COMPRESSOR .............................................. 199 General Precautions ............................................ 199 FLUORESCENT LEAK DETECTOR ............... 200 General Precautions ............................................ 200

DIAGNOSIS AND REPAIR WORKFLOW HAC-5 < BASIC INSPECTION > [AUTOMATIC AIR CONDITIONER] C D E F G H J K L M A B HAC N O P BASIC INSPECTION DIAGNOSIS AND REPAIR WORKFLOW Work Flow INFOID:0000000000954626 DETAILED FLOW 1.LISTEN TO CUSTOMER COMPLAINT Listen to customer complaint. (Get detailed information about the conditions and environment when the symptom occurs.) >> GO TO 2. 2.VERIFY THE SYMPTOM WITH OPERATIONAL CHECK Verify the symptom with operational check. Refer to HAC-6, "Description & Inspection" . >> GO TO 3. 3.GO TO APPROPRIATE TROUBLE DIAGNOSIS Go to appropriate trouble diagnosis (Refer to HAC-108, "Diagnosis Chart By Symptom" below). >> GO TO 4. 4.REPAIR OR REPLACE Repair or replace the specific parts. >> GO TO 5. 5.FINAL CHECK Final check. Is the inspection result normal? YES >> CHECK OUT NO >> GO TO 3.

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2007-2010 Nissan Qashqai Service & Repair Manual

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