oil MAZDA 6 2002 Workshop Manual Suplement

M–64
REAR DIFFERENTIAL
Rear Cover Assembly Note
Caution
•Clean away the old sealant before applying the new sealant.
•Install the rear differential within 10 minutes after applying sealant.
•Allow the sealant to set at least 30 minutes after installation before filling the differential with the
specified oil.
1. Clean the alignment surface of the carrier and rear cover, and apply a thin coat of sealant.
2. Install the rear cover.
Tightening torque
15.7—22.6 N·m {1.6—2.3 kgf·m, 11.6—16.6 ft·lbf}
Oil Seal Assembly Note
1. Apply differential oil to the new oil seal lip.
2. Assemble the oil seal using the SSTs.
End Of Sie
49 G030 796
49 G030 797
A6A63192041

ELECTRONIC 4WD CONTROL SYSTEM
M–65
M
DIFFERENTIAL OIL TEMPERATURE SENSOR INSPECTIONA6E632227100209
Warning
•Hot differential oil may cause severe burns. Do not perform maintenance while differential oil is
hot.
1. Disconnect the negative (-) battery cable.
2. Disconnect the differential oil temperature sensor connector and remove the differential oil temperature sensor.
3. Wrap the differential oil temperature sensor with
plastic wrap and immerse it into a beaker filled
with water. Gradually raise the water
temperature, and measure resistance between
differential oil temperature sensor terminals A and
B.
•If not as specified, inspect the harness for
continuity. If there is normal continuity
between the terminals, replace the differential
oil temperature sensor.
Specification
4. Install the differential oil temperature sensor and connect the connector.
5. Connect the negative (-) battery cable.
End Of Sie
DIFFERENTIAL OIL TEMPERATURE SENSOR REMOVAL/INSTALLATIONA6E632227100210
Warning
•Hot differential oil may cause severe burns. Do not perform maintenance while differential oil is
hot.
1. Disconnect the negative (-) battery cable.
2. Disconnect the differential oil temperature sensor connector.
3. Remove the differential oil temperature sensor.
4. Apply differential oil to the O-ring.
5. Install the differential oil temperature sensor.
Tightening torque
12.7—17.3 N·m {1.3—1.7 kgf·m, 9.4—12.7
ft·lbf}
6. Connect the differential oil temperature sensor
connector.
7. Connect the negative (-) battery cable.
End Of Sie
ELECTRONIC 4WD CONTROL SYSTEM
Water temperature (°C {°F}) Resistance (kirohm)
0 {32} 91—100
10 {50} 56—61
20 {68} 35—39
30 {86} 23—25
40 {104} 14—17
50 {122} 10—11
60 {140} 7.1—7.9
70 {158} 5.0—5.6
80 {176} 3.6—4.0
A B
A6J63222101
DIFFERENTIAL OIL
TEMPERATURE SENSOR
A6E63222102

M–66
ELECTRONIC 4WD CONTROL SYSTEM
4WD SOLENOID INSPECTIONA6E6322271002111. Disconnect the negative (-) battery cable.
2. Disconnect the 4WD solenoid connector.
3. Measure resistance between 4WD solenoid
connector terminals A and B.
•If the resistance is not within the specification,
replace the coupling unit.
Resistance
1.5—2.0 ohms
(Rear differential oil temperature at 20°C
{68°F})
4. Connect the 4WD solenoid connector.
5. Connect the negative (-) battery cable.
End Of Sie
4WD CONTROL MODURE INSPECTIONA6E632227100212
Note
•4WD CM terminal voltage can vary depending on measuring conditions and vehicle aging, resulting in
misdiagnosis. Therefore, it is necessary to perform an overall inspection of the input/output systems and
4WD CM to determine which part is malfunctioning.
•With the 4WD CM connector connected, measure voltage by connecting the voltmeter negative (-) lead to
the body ground and positive (+) lead to each 4WD CM terminal.
1. Measure voltage or resistance at each 4WD CM terminal using a voltmeter and an ohmmeter.
•If not as specified, replace the 4WD CM.
Terminal Voltage List (Reference)
A
B
A6J63222103
Terminal SignalInput/
outputConnected
toMeasuring
itemTest conditionVoltage (V)/
ContinuityInspection location
in case of failure
ADifferential oil
temperature
sensor signalInputDifferential oil
temperature
sensorVoltageIgnition
key
ONDifferential oil
temperature
20°C {68°F}3.0•Inspect
differential oil
temperature
sensor
•Inspect related
harness Differential oil
temperature
60°C {140°F}1.4
B——— ——— — —
CDifferential oil
temperature
sensor GND—Differential oil
temperature
sensorContinuity Any condition Yes•Inspect related
harness
D——— ——— — —
E——— ——— — —
F——— ——— — —
GCAN-HInput/
output—Perform measurement during DTC inspection.—
HCAN-LInput/
output—Perform measurement during DTC inspection.—
A
B C
D E
F G
H I
J K
L M
N O
P
A6J63222104

M–68
ELECTRONIC 4WD CONTROL SYSTEM
COUPLING COMPONENT REMOVAL/INSTALLATIONA6E6322271002141. Drain the differential oil into a container.
2. Remove the after silencer, presilencer, and the catalytic converter. (See F1–30 EXHAUST SYSTEM
REMOVAL/INSTALLATION.)
3. Remove the propeller shaft. (See L–5 PROPELLER SHAFT REMOVAL/INSTALLATION.)
4. Remove in the order indicated in the table.
5. Install in the reverse order of removal.
6. Add differential oil.
.
Coupling Component Removal Note
1. Support the coupling unit with a transmission jack.
2. Cut away the coupling unit using an oil pan seal
cutter.
Coupling Component Installation Note
Note
•Clean away the old sealant before applying the new sealant.
•Install the coupling unit within 10 minutes after applying sealant.
•Allow the sealant to set at least 30 minutes after installation before filling the differential with the specified
oil.
3
12
SEALANTSEALANT
74.5—104.9
{7.6—10.6, 55.0—77.3}22.6—26.4
{2.4—2.6, 16.7—19.4}
N·m {kgf·m, ft·lbf}
A6E63222106
1 4WD solenoid connector
2Bolt3 Coupling component
(See M–68 Coupling Component Removal Note)
(See M–68 Coupling Component Installation Note)
OIL PAN
SEAL CUTTER
A6E63222107

ELECTRONIC 4WD CONTROL SYSTEM
M–69
M
1. Apply sealant to the coupling case surface that contacts the rear differential case.
2. Install the coupling unit to the rear differential so
that the two tabs on the coupling unit engage the
rear differential grooves (two locations).
Tightening torque
22.6—26.4 N·m {2.4—2.6 kgf·m, 16.7—19.4
ft·lbf}
End Of Sie
COUPLING COMPONENT DISASSEMBLYA6E632227100215
Warning
•The engine stand is equipped with a self-lock mechanism, however, if the coupling unit is in a
tilted condition, the self-lock mechanism could become inoperative. If the coupling unit
unexpectedly rotates it could cause injury, therefore do not maintain the coupling unit in a tilted
condition. When turning the coupling unit, grasp the rotation handle firmly.
.
GROOVE
REAR DIFFERENTIAL COUPLING UNITTA B
A6E63222108
SST
SST
SST
SST
9
8
75
4
3
1
2
10
6
A6J63222109
1 Locknut
(See M–70 Locknut Disassembly Note)
2Washer
3 Companion flange
(See M–70 Companion Flange Disassembly Note)
4 Output shaft
(See M–71 Output Shaft Disassembly Note)5 Coupling component
6Oil seal
7Shim
8 Retaining ring
9 Bearing
(See M–71 Bearing Disassembly Note)
10 Coupling case

M–72
ELECTRONIC 4WD CONTROL SYSTEM
COUPLING COMPONENT ASSEMBLYA6E632227100216
Warning
•The engine stand is equipped with a self-lock mechanism, however, if the coupling unit is in a
tilted condition, the self-lock mechanism could become inoperative. If the coupling unit
unexpectedly rotates it could cause injury, therefore do not maintain the coupling unit in a tilted
condition. When turning the coupling unit, grasp the rotation handle firmly.
.
98
7
5
4
3
1
2
10
6
SST
SST
R
SST
SST
SST
R
OIL
36.3—53.9
{3.7—5.4, 26.8—39.7}
167—226
{17.1—23.0,
124—166}
N·m {kgf·m, ft·lbf}
A6E63222117
1 Coupling component
2 Output shaft
(See M–73 Output Shaft Assembly Note)
3 Bearing
(See M–73 Bearing Assembly Note)
4 Retaining ring
5 Coupling case
(See M–73 Coupling Case Assembly Note)6Shim
7 Oil seal
(See M–74 Oil Seal Assembly Note)
8 Companion flange
(See M–74 Companion Flange Assembly Note)
9Washer
10 Locknut
(See M–74 Locknut Assembly Note)

M–74
ELECTRONIC 4WD CONTROL SYSTEM
Oil Seal Assembly Note
1. Apply the specified oil to a new oil seal lip.
2. Install the oil seal to the coupling case using the
SST.
Companion Flange Assembly Note
1. Install the coupling case to the SSTs as shown.
2. Install the companion flange.
Locknut Assembly Note
1. Secure the companion flange using the SST, and
tighten a new locknut.
Tightening torque
167—226 N·m {17.1—23.0 kgf·m, 124—166
ft·lbf}
End Of Sie
49 W011 102
A6J63222121
49 L027 0A2
A6J63222111
49 S120 710
A6E63222119

ON-BOARD DIAGNOSTIC
M–75
M
WIRING DIAGRAMA6E637027100201
End Of Sie
ON-BOARD DIAGNOSTIC
IGNITION SWITCH
BATTERY
DIFFERENTIAL OIL
TEMPERATURE
SENSOR4WD CM4WD SOLENOID ELECTRONIC CONTROL
COUPLING
CAN DRIVERINSTRUMENT CLUSTER
CAN-H
CAN-LPCM DSC HU/CM KO
P I
A
C
NH G
TCM
A6E63702002

M–76
ON-BOARD DIAGNOSTIC
ELECTRONIC 4WD CONTROL SYSTEM ON-BOARD DIAGNOSISA6E637027100202Reading DTCs Procedure
1. Connect WDS or equivalent to the vehicle DLC-2
16-pin connector.
2. Retrieve DTC by WDS or equivalent.
•If a DTC is displayed, proceed with inspection
steps for that DTC.
3. After repair, clear DTCs stored in the 4WD CM by
referring to the Clearing DTCs Procedure.
Clearing DTCs Procedures
1. Connect WDS or equivalent to the vehicle DLC-2
16-pin connector.
2. Clear DTCs by WDS or equivalent.
3. Turn the ignition key to OFF.
4. Perform the DTC inspection again, and verify that
no DTC appears.
5. Disconnect the WDS or equivalent.
DTC Table
End Of Sie
DLC-2
DLC-2
L.H.D.
R.H.D.
A6E63702005
DLC-2
DLC-2
L.H.D.
R.H.D.
A6E63702005
DTC
Diagnosis system component Page
WDS or equivalent
P1887 System wiring (See M–77 DTC P1887)
P1888 Differential oil temperature sensor (See M–79 DTC P1888)
U0100 PCM communication (See M–80 DTC U0100)
U0101 TCM communication (See M–80 DTC U0101)
U0121 ABS/DSC communication (See M–80 DTC U0121)

ON-BOARD DIAGNOSTIC
M–79
M
DTC P1888A6E637027100204
Diagnostic procedure
DTC P1888 Differential oil temperature sensor
DETECTION
CONDITION•Differential oil temperature sensor voltage monitor circuit detects abnormal input voltage.
POSSIBLE
CAUSE•Open circuit, or short to battery or GND between 4WD CM terminal A and differential oil temperature
sensor terminal A
•Open circuit or short to battery between 4WD CM terminal C and differential oil temperature sensor
terminal B
•Differential oil temperature sensor malfunction
•4WD CM malfunction
•Poor connection of connectors (female terminals)
STEP INSPECTION ACTION
1INSPECT DIFFERENTIAL OIL
TEMPERATURE SENSOR CONDITION
•Turn ignition key to OFF.
•Disconnect differential oil temperature
sensor connector.
•Is it okay?Yes Go to next step.
No Replace differential oil temperature sensor, then go to Step
7.
2INSPECT 4WD CM TO DIFFERENTIAL OIL
TEMPERATURE SENSOR FOR OPEN
CIRCUIT
•Disconnect 4WD CM connector.
•Inspect for continuity between 4WD CM
terminal A and differential oil temperature
sensor terminal A.
•Is there continuity?Yes Go to next step.
No Repair or replace harness for open circuit between 4WD CM
and differential oil temperature sensor, then go to Step 7.
3INSPECT 4WD CM TO DIFFERENTIAL OIL
TEMPERATURE SENSOR FOR SHORT TO
POWER
•Inspect voltage between 4WD CM terminal A
and ground.
•Is voltage B+?Yes Repair or replace harness for short to power between 4WD
CM and differential oil temperature sensor, then go to Step
7.
No Go to next step.
A B A
B C
D E
F G
H I
J K
L M
N O
PA
C A
B
4WD CM CONNECTOR4WD CM
DIFFERENTIAL OIL
TEMPERATURE SENSOR
DIFFERENTIAL OIL TEMPERATURE
SENSOR CONNECTOR