engine NISSAN X-TRAIL 2003 Electronic Repair Manual

TROUBLE DIAGNOSIS
MTC-7
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MTC
Operational CheckEJS001FE
The purpose of the operational check is to confirm that the system operates properly.
CHECKING BLOWER
1. Turn fan switch to 1-speed. Blower should operate on low
speed.
2. Then turn fan switch to 2-speed, and continue checking blower
speed until all speeds are checked.
3. Leave blower on 4-speed.
If NG, go to trouble diagnosis procedure for blower motorMTC-13
.
If OK, continue with next check.
CHECKING DISCHARGE AIR
1. Set the mode control dial to each position.
2. Confirm that discharge air comes out according to the air distri-
bution table.Refer to Discharge Air FlowMTC-5
.
Intake door position is checked in the next step.
If NG, go to trouble diagnosis procedure for mode door motor.
If OK, continue with next check.
CHECKING RECIRCULATION
1. Press REC switch one time. Recirculation indicator should illu-
minate.
2. Listen for intake door position change (you should hear blower
sound change slightly).
If NG, go to trouble diagnosis procedure for intake doorMTC-10
.
If OK, continue with next check.Conditions :Engine running and at
normal operating temper-
ature
RJIA0587E
RJIA0588E
RJIA0492E
RJIA0589E

MTC-18
TROUBLE DIAGNOSIS
INSPECTION FLOW
*1 QR20DE:CO-9, "Changing Engine
Coolant",YD22DDTi:
CO-30, "
Changing Engine Coolant"
*2 QR20DE:CO-13, "CHECKING RADI-
AT O R C A P", YD22DTi:CO-34,
"Checking Radiator Cap"
*3 :QR20DE:
(Water temperature sensor),
YD22DTi:CO-42, "
Removal and
Installation"
(Thermostat)
*4 QR20DE:CO-9, "
Changing Engine
Coolant",YD22DTi:CO-30, "Chang-
ing Engine Coolant"
*5MTC-7, "Operational Check"*6MTC-3, "SYMPTOM TABLE"
RJIA0612E

MTC-24
HEATER UNIT
7. Remove the mounting bolts from heater unit.
8. Remove the steering member.
9. Remove the heater unit.
INSTALLATION
1. Installation is basically the reverse order of removal.
NOTE:
When filling radiator with coolant, refer to QR20DE:CO-9, "
Changing Engine Coolant",YD22DDTi:CO-30,
"Changing Engine Coolant".
Disassembly and AssemblyEJS001FA
NOTE:
This illustration is for RHD models. The layout for LHD models is symmetrically opposite.
RJIA0063E
1 Screw 2 Air mix door link 3 Air mix door gear
4Screw 5Cablebracket 6Screw
7 Foot duct (right) 8 Screw 9 Ventilator door link 2
10 Ventilator door link 2 11 Ventilator door lever 12 Main link
13 Max cool door lever 14 Defroster door lever 15 Heater case (right)
16 Defroster door 17 Ventilator door 18 Max cool door
19 Heater case (left) 20 Screw 21 Heater pipe support
RJIA0613E

PG-1
POWER SUPPLY, GROUND & CIRCUIT ELEMENTS
K ELECTRICAL
CONTENTS
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SECTION
A
B
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POWER SUPPLY, GROUND & CIRCUIT ELEMENTS
POWER SUPPLY ROUTING ...................................... 2
Schematic ................................................................ 2
Wiring Diagram — POWER — ................................. 3
BATTERY POWER SUPPLY — IGNITION SW.
IN ANY POSITION ................................................ 3
ACCESSORY POWER SUPPLY — IGNITION
SW. IN “ACC” OR “ON” ......................................... 7
IGNITION POWER SUPPLY — IGNITION SW.
IN “ON” AND/OR “START” .................................... 8
Fuse ....................................................................... 12
Fusible Link ............................................................ 12
Circuit Breaker ....................................................... 12
GROUND .................................................................. 13
Ground Distribution ................................................ 13
MAIN HARNESS/LHD MODELS ........................ 14
MAIN HARNESS/RHD MODELS ........................ 16
ENGINE ROOM HARNESS/LHD MODELS ....... 18
ENGINE ROOM HARNESS/RHD MODELS ....... 19
ENGINE ROOM HARNESS ................................ 20
ENGINE CONTROL HARNESS/GASOLINE
ENGINE MODELS .............................................. 21
ENGINE CONTROL HARNESS/DIESEL
ENGINE MODELS .............................................. 22
BODY HARNESS/LHD MODELS ....................... 23
BODY HARNESS/RHD MODELS ....................... 24
BODY NO.2 HARNESS/LHD MODELS .............. 25
BODY NO.2 HARNESS/RHD MODELS ............. 26
BODY NO.2 HARNESS ...................................... 27
BACK DOOR SUB HARNESS/REAR WINDOW
DEFOGGER HARNESS ..................................... 28
HARNESS ................................................................. 29
Harness Layout ...................................................... 29
HOW TO READ HARNESS LAYOUTS ............... 29
OUTLINE/LHD MODELS .................................... 30
OUTLINE/RHD MODELS .................................... 31
MAIN HARNESS/LHD MODELS ........................ 32
MAIN HARNESS/RHD MODELS ........................ 34ENGINE ROOM HARNESS/LHD MODELS ........ 36
ENGINE ROOM HARNESS/RHD MODELS ....... 41
ENGINE CONTROL HARNESS .......................... 46
BODY HARNESS/LHD MODELS ....................... 49
BODY HARNESS/RHD MODELS ....................... 50
BODY NO.2 HARNESS/LHD MODELS .............. 51
BODY NO.2 HARNESS/RHD MODELS .............. 52
ROOM LAMP HARNESS .................................... 53
FRONT DOOR HARNESS/LHD MODELS .......... 54
FRONT DOOR HARNESS/RHD MODELS ......... 56
REAR DOOR HARNESS .................................... 58
BACK DOOR HARNESS .................................... 60
Wiring Diagram Codes (Cell Codes) ...................... 61
ELECTRICAL UNITS LOCATION ............................ 64
Electrical Units Location ......................................... 64
ENGINE COMPARTMENT .................................. 65
PASSENGER COMPARTMENT/LHD MODELS... 66
PASSENGER COMPARTMENT/RHD MODELS... 68
HARNESS CONNECTOR ......................................... 70
Description .............................................................. 70
HARNESS CONNECTOR (TAB-LOCKING
TYPE) .................................................................. 70
HARNESS CONNECTOR (SLIDE-LOCKING
TYPE) .................................................................. 71
JOINT CONNECTOR (J/C) ....................................... 72
Terminal Arrangement ............................................ 72
ELECTRICAL UNITS ................................................ 73
Terminal Arrangement ............................................ 73
STANDARDIZED RELAY .......................................... 74
Description .............................................................. 74
NORMAL OPEN, NORMAL CLOSED AND
MIXED TYPE RELAYS ........................................ 74
TYPE OF STANDARDIZED RELAYS ................. 74
FUSE BLOCK-JUNCTION BOX(J/B) ....................... 76
Terminal Arrangement ............................................ 76
FUSE AND FUSIBLE LINK BOX .............................. 77
Terminal Arrangement ............................................ 77

PG-18
GROUND
ENGINE ROOM HARNESS/LHD MODELS
CKWA0047E

GROUND
PG-19
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ENGINE ROOM HARNESS/RHD MODELS
CKWA0048E

PG-20
GROUND
ENGINE ROOM HARNESS
CKWA0049E

GROUND
PG-21
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ENGINE CONTROL HARNESS/GASOLINE ENGINE MODELS
CKWA0050E

PG-22
GROUND
ENGINE CONTROL HARNESS/DIESEL ENGINE MODELS
CKWA0051E

HARNESS
PG-29
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HARNESSPFP:00011
Harness LayoutEKS0032I
HOW TO READ HARNESS LAYOUTS
The following Harness Layouts use a map style grid to help locate
connectors on the drawings:
lMain Harness
lEngine Room Harness (Engine Compartment)
lEngine Control Harness
lBody Harness
lBody No.2 Harness
lRoom Lamp Harness
lDoor Harness
To use the grid reference
1. Find the desired connector number on the connector list.
2. Find the grid reference.
3. On the drawing, find the crossing of the grid reference letter column and number row.
4. Find the connector number in the crossing zone.
5. Follow the line (if used) to the connector.
CONNECTOR SYMBOL
Main symbols of connector (in Harness Layout) are indicated in the below.SEL252V
SKIA0404E