INFINITI QX56 2004 Factory Service Manual

PB-2
PREPARATION
Revision: August 20072004 QX56
PREPARATIONPFP:00002
Commercial Service ToolsEFS003Q3
Tool number
(Kent-Moore No.)
Tool nameDescription
—
(J-21177-A)
Brake drum clearence gaugeMeasuring rear rotor drum to parking
brake shoe clearance
Power toolLoosening bolts and nuts
WFIA0167E
PBIC0190E

PARKING BRAKE SYSTEM
PB-3
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Revision: August 20072004 QX56
PARKING BRAKE SYSTEMPFP:36010
On-Vehicle ServiceEFS003Q4
PEDAL STROKE

When parking brake pedal is operated with the specified force, make sure the stroke is within the specified
number of notches. Check by listening and counting the ratchet clicks.
INSPECTION

Make sure the components are attached properly, checking for looseness or backlash.

Check parking brake pedal assembly for bends, damage and cracks, and replace if necessary.

Check cable for wear and damage, and replace if necessary.

Check parking brake warning lamp switch for malfunction, and replace if necessary. Refer to DI-32, "Wir-
ing Diagram — WARN —" .
ADJUSTMENT
1. Remove lower driver instrument panel. Refer to IP-13, "Instrument Lower Cover LH" .
2. Partially engage parking brake pedal to access adjusting nut.
3. Insert a deep socket wrench to rotate adjusting nut and loosen
cable sufficiently. Then, disengage the parking brake pedal.
4. Remove the wheel and tire using power tool.
5. Remove the rotor and measure inner diameter at widest point
using Tool.
6. Transfer measurement less 0.6 mm to the parking brake shoes
and adjust accordingly.
7. Using wheel nuts, secure the disc to the hub to prevent it from
tilting.
8. Rotate disc rotor to make sure there is no drag.
9. Adjust cable as follows:
a. Operate pedal 10 or more times with a force of 490 N (50 kg,
11 0 l b ) .
b. Rotate adjusting nut with deep socket to adjust pedal stroke to
specification.
c. With parking brake pedal completely disengaged, make sure
there is no drag on the parking brake.Pedal stroke : 3 − 4 notches [under force of 196 N (20.0 kg, 44.1 lb)]
WFIA0165E
Tool number : — (J-21177A)
Pedal stroke : 3 − 4 notches [under force of
196 N (20.0 kg, 44.1 lb)]
WFIA0166E

PB-4
PARKING BRAKE CONTROL
Revision: August 20072004 QX56
PARKING BRAKE CONTROLPFP:36010
ComponentsEFS003Q5
Removal and InstallationEFS003Q6
REMOVAL
1. Remove lower instrument panel and center console. Refer to IP-10, "INSTRUMENT PANEL ASSEMBLY"
.
2. Remove floor trim. Refer to EI-36, "
Removal and Installation" .
3. Remove adjusting nut.
CAUTION:
Do not reuse adjusting nut after removing it.
4. Remove the lock plate from the front cable.
5. Remove front parking brake cable bolts and nut.
6. Disconnect return spring from equalizer.
7. Disconnect the front parking brake cable from the equalizer and remove front cable.
8. Remove rear disc rotors. Refer to BR-28, "
Removal and Installation of Brake Caliper Assembly and Disc
Rotor" .
9. Remove parking brake shoes, and remove rear cable from toggle lever. Refer to PB-6, "
PARKING BRAKE
SHOE" .
10. Remove equalizer from right and left rear cables.
11. Remove right and left rear cable bolts and nuts, then remove right and left rear cables.
1. Pedal assembly 2. Front cable 3. Right rear cable
4. Left rear cable 5. Return spring 6. Equalizer
7. Adjusting nut 8. Lock plate
WFIA0163E

PARKING BRAKE CONTROL
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Revision: August 20072004 QX56
INSTALLATION

Installation is in the reverse order of removal.
CAUTION:
Do not reuse adjusting nut after removing it.

Adjust parking brake. Refer to PB-3, "ADJUSTMENT" .

PB-6
PARKING BRAKE SHOE
Revision: August 20072004 QX56
PARKING BRAKE SHOEPFP:44060
Removal and InstallationEFS003Q7
COMPONENTS
REMOVAL
WAR NIN G:
Clean the brakes with a vacuum dust collector to minimize the hazard of airborne particles or other
materials.
NOTE:
Remove the disc rotor only with the parking brake pedal completely disengaged.
1. Remove the rear disc rotor. Refer to BR-28, "
Removal and Installation of Brake Caliper Assembly and
Disc Rotor" .
2. Remove the rear drive shaft. Refer to RAX-7, "
Removal and Installation" .
3. Disconnect ABS sensor at harness connector. Then remove ABS sensor wire from grommet mounts.
4. Remove wheel hub and bearing assembly. Refer to RAX-5, "
Removal and Installation" .

Withdraw ABS sensor harness through back plate when removing wheel hub and bearing assembly.
5. Remove the return springs.
6. Remove the adjuster.
7. Remove the retainers, anti-rattle pins and shoes.
8. Disconnect the parking brake cable from the toggle lever.
9. Remove back plate.
1. Back plate 2. Shoes 3. Toggle lever
4. Return springs 5. Retainers 6. Adjuster
7. Anti-rattle pins
WFIA0164E

PARKING BRAKE SHOE
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Revision: August 20072004 QX56
INSPECTION AFTER REMOVAL
Lining Thickness Inspection

Check thickness of lining.
Drum Inner Diameter Inspection

Check drum inner diameter.
Other Inspections

Check shoe sliding surface for excessive wear and damage.

Check anti-rattle pin for excessive wear and corrosion.

Check return spring for sagging.

Check adjuster for rough operation.

When disassembling adjuster, apply PBC (Poly Butyl Cuprysil) grease or equivalent to the adjuster
threads. Refer to MA-10, "
RECOMMENDED FLUIDS AND LUBRICANTS" .

Check either visually or with a vernier caliper to see if there is any excessive wear, cracks, or damage
inside drum.
INSTALLATION
Installation is in the reverse order of removal.

Apply brake grease to the specified points during assembly. Refer to PB-6, "COMPONENTS" .

Install adjuster so that threaded part expands when rotating it in
the direction shown by the arrow.

Shorten adjuster by rotating it in the oposite direction as shown
by the arrow.
NOTE:
After replacing brake shoes or disc rotors, or if parking brake does
not function well, perform break-in operation as follows.
1. Adjust parking brake pedal stroke. Refer to PB-3, "
ADJUST-
MENT" .
2. Perform parking brake burnishing operation by driving the vehicle forward under the following conditions:Standard thickness "A" : 5.15 ± 0.25 mm
(0.203 ± 0.010 in)
Repair limit thickness "A" : 0.5 mm (0.020 in)
SBR0 21 A
Standard inner
diameter: 205 ± 0.13 mm (8.07 ± 0.01 in)
Maximum inner
diameter: 205.7 mm (8.10 in)
SBR7 68 A
SFIA0153E

Vehicle speed 40 km/h (25 MPH) set (forward)

Parking brake operating force 196 N (20.0 kg, 44.1 lb) set

Apply time 30 sec.

PB-8
PARKING BRAKE SHOE
Revision: August 20072004 QX56
CAUTION:

To prevent lining from getting too hot, allow a cool off period of approximately 5 minutes after
every break-in operation.

Do not perform excessive break-in operations, because it may cause uneven or early wear of
lining.
3. After burnishing operation, check parking brake pedal stroke. Readjust if it is now longer than the speci-
fied stroke. Refer to PB-3, "
ADJUSTMENT" .

SERVICE DATA AND SPECIFICATIONS (SDS)
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Revision: August 20072004 QX56
SERVICE DATA AND SPECIFICATIONS (SDS)PFP:00030
Parking Drum Brake EFS003Q8
Unit: mm (in)
Parking Brake ControlEFS003Q9
Ty peDrum
Brake liningStandard thickness (new) 5.15 ± 0.25 (0.203 ± 0.010)
Wear limit thickness 0.5 (0.020)
Drum inner diameter (disc)Standard inner diameter (new) 205 ± 0.13 (8.07 ± 0.01)
Wear limit of inner diameter 205.7 (8.10)
Control typeFoot pedal
Number of notches [under force of 196 N (20.0 kg, 44.1 lb)] 3 – 4 notches
Number of notches when warning lamp switch comes on 1 notch

PB-10
SERVICE DATA AND SPECIFICATIONS (SDS)
Revision: August 20072004 QX56

PG-1
POWER SUPPLY, GROUND & CIRCUIT ELEMENTS
K ELECTRICAL
CONTENTS
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SECTION PG
A
B
PG
Revision: August 20072004 QX56 PRECAUTIONS .......................................................... 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 3
Wiring Diagrams and Trouble Diagnosis .................. 3
POWER SUPPLY ROUTING CIRCUIT ...................... 4
Schematic ................................................................ 4
Wiring Diagram — POWER — ................................. 6
BATTERY POWER SUPPLY — IGNITION SW.
IN ANY POSITION ................................................ 6
ACCESSORY POWER SUPPLY — IGNITION
SW. IN ACC OR ON .............................................11
IGNITION POWER SUPPLY — IGNITION SW.
IN ON .................................................................. 12
IGNITION POWER SUPPLY — IGNITION SW.
IN ON AND/OR START ....................................... 13
IPDM E/R (INTELLIGENT POWER DISTRIBUTION
MODULE ENGINE ROOM) ...................................... 17
System Description ................................................ 17
SYSTEMS CONTROLLED BY IPDM E/R ........... 17
CAN COMMUNICATION LINE CONTROL ......... 17
IPDM E/R STATUS CONTROL ........................... 18
CAN Communication System Description .............. 18
Function of Detecting Ignition Relay Malfunction ... 18
CONSULT-II Function (IPDM E/R) ......................... 19
CONSULT-II BASIC OPERATION ...................... 19
SELF-DIAGNOSTIC RESULTS .......................... 20
DATA MONITOR ................................................. 20
ACTIVE TEST ..................................................... 22
Auto Active Test ..................................................... 23
DESCRIPTION .................................................... 23
OPERATION PROCEDURE ............................... 23
INSPECTION IN AUTO ACTIVE TEST MODE ... 23
Schematic .............................................................. 25
IPDM E/R Terminal Arrangement ........................... 26
IPDM E/R Power/Ground Circuit Inspection .......... 27
Inspection with CONSULT-II (Self-Diagnosis) ........ 28
Removal and Installation of IPDM E/R ................... 29
REMOVAL ........................................................... 29
INSTALLATION ................................................... 29GROUND CIRCUIT ................................................... 30
Ground Distribution ................................................. 30
MAIN HARNESS ................................................. 30
ENGINE ROOM HARNESS ................................ 33
ENGINE CONTROL HARNESS .......................... 36
BODY HARNESS ................................................ 37
BODY NO. 2 HARNESS ..................................... 38
BACK DOOR NO. 2 RH HARNESS .................... 39
HARNESS ................................................................. 40
Harness Layout ...................................................... 40
HOW TO READ HARNESS LAYOUT ................. 40
OUTLINE ............................................................. 41
MAIN HARNESS ................................................. 42
ENGINE ROOM HARNESS (LH VIEW) .............. 44
ENGINE ROOM HARNESS (RH VIEW) ............. 47
ENGINE CONTROL HARNESS .......................... 49
CHASSIS HARNESS .......................................... 51
BODY HARNESS ................................................ 53
BODY NO. 2 HARNESS ..................................... 55
ROOM LAMP HARNESS .................................... 57
FRONT DOOR LH HARNESS ............................ 58
FRONT DOOR RH HARNESS ............................ 58
REAR DOOR LH HARNESS ............................... 59
REAR DOOR RH HARNESS .............................. 59
BACK DOOR HARNESS .................................... 60
Wiring Diagram Codes (Cell Codes) ...................... 61
ELECTRICAL UNITS LOCATION ............................ 64
Electrical Units Location ......................................... 64
ENGINE COMPARTMENT .................................. 64
PASSENGER COMPARTMENT ......................... 65
Fuse ........................................................................ 67
Fusible Link ............................................................ 67
Circuit Breaker (Built Into BCM) ............................. 67
HARNESS CONNECTOR ......................................... 68
Description .............................................................. 68
HARNESS CONNECTOR (TAB-LOCKING
TYPE) .................................................................. 68
HARNESS CONNECTOR (SLIDE-LOCKING
TYPE) .................................................................. 69
HARNESS CONNECTOR (DIRECT-CONNECT