2002 MAZDA 6 ECU

TROUBLESHOOTING
M–83
M
Diagnostic procedure
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NO.2 TIGHT CORNER BRAKINGA6E638027100205
Diagnostic procedure
STEP INSPECTION ACTION
1VERIFY DSC, PCM, TCM, AND 4WD SYSTEM
DTCs
•Verify DSC, PCM, TCM, and 4WD system
DTCs using WDS or equivalent.
•Are there any DTCs present?Yes Go to applicable DTC inspection.
No Go to next step.
2VERIFY TIRE AIR PRESSURE
•Inspect tire air pressure.
•Is it within specification?Yes Go to next step.
No Adjust tire air pressure, then go to next step.
3COMPARE WITH SAME MODEL TIRES
•Install tires of the same model.
•Perform simulation driving.
•Does malfunction recur?Yes Go to next step.
No 4WD system is okay.
4COMPARE WITH SAME MODEL VEHICLE
•Install tires of malfunctioning vehicle to
another same model vehicle.
•Perform simulation driving.
•Does malfunction recur?Yes 4WD system is okay.
No Go to next step.
5INSPECT 4WD SOLENOID
•Inspect 4WD solenoid.
(See M–66 4WD SOLENOID INSPECTION)
•Is coupling component solenoid okay?Yes Inspect harness between 4WD solenoid and 4WD CM, then
go to next step.
No Replace coupling component.
6INSPECT WHEEL ALIGNMENT
•Inspect wheel alignment.
•Is it okay?Yes Replace coupling component.
No Inspect wheel alignment, and adjust it if necessary.
2 Tight corner braking
[TROUBLESHOOTING HINTS]
•Because the coupling component locks up easily (similar to direct 4WD), rotational difference between the front
and rear wheels cannot be absorbed and brake-like phenomenon occurs.
•Due to the coupling component construction, slight tight corner braking effect occurs during tight cornering on a
paved road. (4WD system is okay. Compare with another same model vehicle to determine malfunction.)
•Coupling component malfunction
•4WD solenoid malfunction
STEP INSPECTION ACTION
1VERIFY DSC, PCM, TCM, AND 4WD SYSTEM
DTCS
•Verify DSC, PCM, TCM, and 4WD system
DTCs using WDS or equivalent.
•Are there any DTCs present?Yes Go to applicable DTC inspection.
No Go to next step.
2VERIFY TIRE AIR PRESSURE
•Inspect tire air pressure.
•Is it within specification?Yes Go to next step.
No Adjust tire air pressure, then go to next step.
3INSPECT ABS WHEEL-SPEED SENSOR
•Inspect ABS wheel-speed sensor.
•Is it okay?Yes Go to next step.
No Repair or replace malfunctioning part.
4COMPARE WITH SAME MODEL VEHICLE
•Perform simulation driving with another
same model vehicle.
•Does malfunction recur on the same model
vehicle?Yes 4WD system is okay.
No Go to next step.
5PERFORM SIMULATION DRIVING WITH 4WD
SOLENOID CONNECTOR DISCONNECTED
•Turn ignition key OFF.
•Disconnect 4WD solenoid connector.
•Perform simulation driving. (Clear DTC after
simulation driving.)
•Does malfunction recur?Yes Replace coupling component.
No Go to next step.

ENGINE SPEED SENSING POWER STEERING
N–11
N
Crossmember bracket removal note
Warning
•Removing the crossmember is dangerous. The crossmember component could fall and cause
serious injury or death. Verify that the jack securely supports the crossmember component before
removing the crossmember bracket.
1. Support the crossmember component with a jack
and remove the nuts.
2. Remove the crossmember bracket.
Crossmember component, steering gear and linkage removal note
Warning
•Removing the crossmember is dangerous. The crossmember component could fall and cause
serious injury or death. Verify that the jack securely supports the crossmember component before
removing the crossmember bracket.
1. Remove the crossmember component, steering gear and linkage.
Steering gear and linkage installation note
1. Loosely tighten bolts.
2. Tighten the mounting bracket bolts to the
specified torque in the order shown.
Tightening torque
74.4—104.8 N·m
{7.6—10.6 kgf·m, 55—77 ft·lbf}
Bolt (intermediate shaft) installation note
1. Align the marks and install the intermediate shaft and bolt.
JACK
A6E7414W036
3
3
1
1
2
2
L.H.D.
R.H.D.
A6E0612W027

N–18
ENGINE SPEED SENSING POWER STEERING
Power Steering Oil Pump Component Disassembly Note
1. Secure the power pressure oil pump using the SST.
Caution
•Use the SST to prevent damage to the
pump when securing it in a vise.
Clip Disassembly Note
1. Lift up the clip tab using a flathead screwdriver.
2. Remove the clip by pushing it with a flathead
screwdriver and a hammer as shown in the figure.
Vane Assembly Note
1. Place the vanes in the rotor with the rounded
edges contacting the cam.
10 Rear pump body
(See N–19 Rear Pump Body Assembly Note)
11 Gasket
12 Cam ring
(See N–19 Cam Ring Assembly Note)13 Rotor
14 Vane
(See N–18 Vane Assembly Note)
15 Side plate
16 Power steering oil pump
49 F032 301
A6E66142010
CLIP
R
A6E66142008
A6E6316W013

ENGINE SPEED SENSING POWER STEERING
N–19
N
Cam Ring Assembly Note
1. Install the cam ring in the front pump body with
the mark facing upward.
Rear Pump Body Assembly Note
1. After installing the rear body, manually turn the shaft to verify that it rotates smoothly.
Clip Assembly Note
1. Push the clip slowly in the direction shown in the
figure.
2. Confirm that the clip tab is securely fastened.
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A6E6316W014
CLIP
R
A6E66142009

R–16
REAR SUSPENSION
Bolt (Trailing Link Front Side) Removal Note
1. Support the trailing link with a jack.
Caution
•Removing the trailing link is dangerous.
The trailing link could fall and cause
serious injury or death. Verify that the
jack securely supports the trailing link.
2. Remove the bolts (trailing link front side).
Bolt (Lateral Link Outer Side) Removal Note
1. Loosen the bolt (lateral link inner side).
2. Remove the bolt (lateral link outer side).
Bolt (Lateral Link Outer Side) Installation Note
1. Tighten the bolt (lateral link outer side).
2. Tighten the bolt (lateral link inner side).
Tightening torque
86.2—116.6 N·m {8.80—11.88 kgf·m, 63.58—85.99 ft·lbf}
Bolt (Trailing Link Front Side) Installation Note
1. Support the trailing link with a jack.
2. Tighten the bolts (trailing link front side).
End Of SieREAR CROSSMEMBER REMOVAL/INSTALLATION (4WD)A6E741628400201
Caution
•Performing the following procedures without first removing the ABS wheel-speed sensor may
possibly cause an open circuit in the harness if it is pulled by mistake. Before performing the
following procedures, remove the ABS wheel-speed sensor (axle side) and fix it to an appropriate
place where the sensor will not be pulled by mistake while servicing the vehicle.
1. Remove the rear auto leveling sensor and harness.
(See T–20 REAR AUTO LEVELING SENSOR REMOVAL/INSTALLATION.)
2. Remove the middle pipe.
(See F1–30 EXHAUST SYSTEM REMOVAL/INSTALLATION.)
3. Remove in the order indicated in the table.
4. Install in the reverse order of removal.
5. Adjust the headlight zeroset.
6. Inspect the rear wheel alignment.
(See R–9 REAR WHEEL ALIGNMENT (WGN).)
JACK
A6E74162010
JACK
A6E74162010

R–18
REAR SUSPENSION
Crossmember component, Differential And Drive Shaft Removal Note
1. Support the differential with a jack, and remove
the nut.
Warning
•Removing the crossmember component,
differential and drive shaft is dangerous.
The crossmember component,
differential and drive shaft could fall and
cause serious injury or death. Verify that
the jack securely supports the differential
lower side.
2. Remove the crossmember component,
differential and drive shaft.
Rear Crossmember Bushing Removal Note
1. Remove the bushing using a screw driver (-),
being careful not to damage the rear
crossmember.
Rear Crossmember Bushing Installation Note
1. Set the bushings as shown in the figure.
JACK
A6E74162012
A6E7416W001
A
B
D
C
A
B
C,D
FRONT
UPPER SIDELOWER SIDE
OVAL
HOLECROSS-
SECTIONAL
VIEW
A6E74162014

S–12
MOLDING
ROOF MOLDING REMOVALA6E773050620201With Roof Rail
1. Remove the roof rail.
2. Detach the clips which secure A section of roof
moldings, using a screwdriver or equivalent tool.
3. Remove the roof molding No.2 and No.3.
4. While pulling the roof molding No.1 up, detach the
fit for the T stud of the B section and the roof
molding No.1 and then remove the roof molding
No.1.
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ROOF MOLDING INSTALLATIONA6E773050620202With Roof Rail
1. Attach the roof molding No.1 to the T stud at the A
section.
2. Hook the roof molding No.1 to clip B at the B
section, press it in, and attach the roof molding
No.1 to clip B.
MOLDING
FRONTb
ba
a B
TOP VIEW
SEC. a—a CLIP
SEC. b—b T STUD
ROOF
MOLDING No.3RROOF
MOLDING No.1R
ROOF
MOLDING No.2R
AAA
AA A
A6A7730W102
FRONTb
b a
aB
A
TOP VIEW
SEC. a—a T STUD
ROOF MOLDING No.1
SEC. b—b CLIP B
A6A7730W104

T–2
OUTLINE, POWER SYSTEM
OUTLINE OF CONSTRUCTIONA6E810201088201•The construction and operation of the body electrical system is essentially carried over from that of the current
Mazda6 (GG) model, except for the following features. (See Mazda6 Training Manual 3359-1*-02C)
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FEATURESA6E810201088202Improved Safety
•There are two types of high-mount brake lights. (WGN)
Improved Marketability
•A cargo compartment light has been adopted. (WGN)
•The installation positions of the rear wiper and washer components have been changed. (WGN)
•A fuel gauge sender sub-unit has been adopted. (4WD)
•A 4WD indicator light, glow indicator light and sedimentor warning light have been adopted.
•The installation positions of the condenser and the noise filter have been changed. (WGN)
•An antenna feeder has been adopted. (WGN)
•A rear auto leveling sensor especially for the 4WD has been adopted. (4WD)
Improved Security
•A rear intruder sensor has been adopted. (WGN)
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STRUCTURAL VIEWA6E811067730201
.
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OUTLINE
POWER SYSTEM
2
1
A6E81101102
1 Seat warmer relay (with seat warmer)2 Glow relay (MZR-CD (RF Turbo) only)