key battery MAZDA 6 2002 Workshop Manual Suplement

ON-BOARD DIAGNOSTIC
F2–27
F2
PID/DATA MONITOR AND RECORDA6E407018881204PID monitoring item table
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SIMULATION TESTA6E407018881205Simulation test item table
×: Applicable
Item Definition Condition/unit PCM terminal
ACCS A/C relay ON/OFF 73
ACSW A/C switch ON/OFF 84
APS1 Accelerator position sensor No.1 signal voltage V 10
APS2 Accelerator position sensor No.2 signal voltage V 88
BAROBarometric pressure kPa, inHg
-
Barometric pressure signal voltage V
BOO Brake switch ON/OFF 7
CPP Clutch switch ON/OFF 33
CPP/PNP Neutral switch Neutral/Drive 56
CRUISESW Cruise control switch ON/OFF 64
DTCCNT DTC count - -
ECTEngine coolant temperature°C, °F
87
Engine coolant temperature signal voltage V
FAN2 Cooling fan relay No.2 ON/OFF 76
FAN3 Cooling fan relay No.1 ON/OFF 102
IATIntake air temperature°C, °F
60
Intake air temperature signal voltage V
IMRC VSC solenoid valve ON/OFF 101
INGEAR In gear ON/OFF 33, 56
INJ_LRN_DIS Distance from the last injector learning Km, Mile -
MAFMass air flow amount g/s
9
Mass air flow signal voltage V
MAF_LRN_DIS Distance from the last MAF learning Km, Mile -
MAINRLY PCM control relay ON/OFF 69
MAPManifold absolute pressure kPa, inHg
36
Manifold absolute pressure signal voltage V
MIL Malfunction indicator lamp ON/OFF 71
NUMKEYS Number of keys stored in module - -
RPM Engine speed rpm 3, 29
VPWR Battery positive voltage V 27
VSS Vehicle speed km/h, mph 13, 39
Item Definition OperationTest condition
PCM
terminal
Key ON Idle
ACCS A/C relay ON or OFF××73
EGRA EGR solenoid valve (vent)Actuated by any duty value
(0—100%)××72
EGRV EGR solenoid valve (vacuum)Actuated by any duty value
(0—100%)××99
EGRV2 EGR control solenoid valve ON or OFF××77
FAN Cooling fan No.2 ON or OFF××76
FAN3 Cooling fan No.1 ON or OFF××102
GP_LMP Glow indicator light ON or OFF××97
GPC Glow plug relay ON or OFF××68
IASV Intake shutter solenoid valve (half) ON or OFF××74
IASV2 Intake shutter solenoid valve (full) ON or OFF××100
IMRC VSC solenoid valve ON or OFF××101
VBCV VBC solenoid valveActuated by any duty value
(0—100%)××67

F2–66
CONTROL SYSTEM
IAT
(IAT)°C°F•IAT is 20°C {68°F}: 20°C {68°F}
•IAT is 30°C {86°F}: 30°C {86°F}Inspect IAT sensor No.1.
(See F2–74 MASS AIR
FLOW (MAF)/INTAKE AIR
TEMPERATURE (IAT)
SENSOR INSPECTION)60
IAT
(IAT signal voltage)V•IAT is 20°C {68°F}: 2.2—2.5 V
•IAT is 30°C {86°F}: 1.7—2.0 V
IMRC
(VSC solenoid valve)ON/OFF•Idle: ON
•Engine speed is above approx.
2,500 rpm: OFFInspect following PIDs:
BARO, ECT, IAT, RPM, VSS101
INGEAR
(In gear)ON/OFF•Gear is not neutral position and
clutch pedal released: ON
•Gear is neutral position: OFF
•Clutch pedal depressed: OFFInspect following PIDs:
CPP, CPP/PNP33, 56
INJ_LRN_DIS
(Distance from the last
injector learning)Km Mile•Distance from the last injector
learning––
MAF
(Mass air flow amount)g/s•Engine switch is on: approx. 0 g/s
•Idle: 6.8—7.4 g/sInspect MAF/IAT sensor.
(See F2–74 MASS AIR
FLOW (MAF)/INTAKE AIR
TEMPERATURE (IAT)
SENSOR INSPECTION)9
MAF
(Mass air flow signal voltage)V•Engine switch is on: 0.0—1.0 V
•Idle: 1.5—2.1 V
MAF_LRN_DIS
(Distance from the last MAF
learning)Km Mile•Distance from the last MAF
learning––
MAINRLY
(PCM control relay)ON/OFF•Engine switch is on: ONInspect PCM control relay.
(See T–19 RELAY
INSPECTION)69
MAP
(MAP)kPa inHg•Engine switch is on: 100—103
kPa {29.5—30.4 inHg}
•Idle: 100—103 kPa {29.5—30.4
inHg}Inspect boost sensor.
(See F2–78 BOOST
SENSOR INSPECTION)36
MAP
(MAP signal voltage)V•Engine switch is on: 2.1—2.5 V
•Idle: 2.1—2.5 V
MIL
(MIL)ON/OFF•Engine switch is on: ON
•DTC output: ON
•Others: OFFInspect instrument cluster.
Inspect CAN system.
(See T–39 MULTIPLEX
COMMUNICATION
SYSTEM)13, 39
NUMKEYS
(Number of keys stored in
module)–•Number of keys stored in module––
RPM
(Engine speed)rpm•Idle: 725—825 rpmInspect CKP sensor.
(See F2–80 CAMSHAFT
POSITION (CMP) SENSOR
INSPECTION)3, 29
VPWR
(Battery positive voltage)V•Engine switch is ON: B+Inspect Battery.
Inspect fuse.4
VSS
(Vehicle speed)km/h mph•Vehicle speed is 20 km/h {12.5
mph}: 20 km/h {12.5 mph}
•Vehicle speed is 40 km/h {25
mph}: 40 km/h {25 mph}Inspect CAN system.
(See T–39 MULTIPLEX
COMMUNICATION
SYSTEM)13, 39 Monitor item (Definition)Unit/
ConditionCondition/Specification
(Reference)ActionPCM
terminal

G–6
CHARGING SYSTEM
BATTERY INSPECTIONA6E471018520202MZR-CD (RF Turbo)
Battery
1. Inspect the battery with the following procedure.
Load test chart
Battery positive voltage with load
Back-up Current
1. Verify that the engine switch is off and that the engine key has been removed.
2. Disconnect the negative battery cable.
Caution
•Operating electrical loads while measuring the back-up current can damage the circuit tester.
3. Measure the back-up current between the negative battery terminal and the negative battery cable.
(1) If the current exceeds the maximum, remove the fuses in the main fuse block and the fuse block one by
one while measuring the back-up current.
(2) Inspect and repair harnesses and connectors on the fuse where the current has been reduced.
Back-up current
20 mA max.
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BATTERY RECHARGINGA6E471018520203MZR-CD (RF Turbo)
Caution
•To avoid damage to the battery, do not quick charge for over 30 min.
•When disconnecting the battery, remove the negative cable first and install it last to prevent
damage to electrical components or the battery.
•To avoid deformation or damage to the battery, remove the battery plugs while charging the
battery.
Step Inspection Result Action
1Measure open circuit
voltage of battery.Above
12.4 VGo to Step
3.
Below
12.4 VGo to next
step.
2Quick-charge for 30 min.
and recheck voltage.Above
12.4 VGo to next
step.
Below
12.4 VReplace
battery.
3Apply load test (see load
test chart) to battery using a
battery load tester and
record battery voltage after
15 s. Is voltage more than
specification?YesBattery
okay.
NoReplace
battery.
Battery Load (A)
95D31L (64) 250
115D31L (70) 320
Approximate battery temp. Minimum voltage (V)
21°C {70°F} 9.6
15°C {60°F} 9.5
10°C {50°F} 9.4
4°C {40°F} 9.3
–1°C {30°F} 9.1
–7°C {20°F} 8.9
–12°C {10°F} 8.7
–18°C {0°F} 8.5

ON-BOARD DIAGNOSTIC
K2–143
K2
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5INSPECT LINE PRESSURE
•Start engine.
•Measure line pressure.
Specification
—D range, M (2GR) range
Idle: 290—490 kPa {3.0—4.9 kgf/cm
2, 43—69
psi}
Stall: 1,550—1,750 kPa {15.8—17.8 kgf/cm
2,
225—254 psi}
—M (1GR) range, R position
Idle:550—750 kPa {5.6—7.6 kgf/cm
2, 80—
109 psi}
Stall: 1,550—1,750 kPa {15.8—17.8 kgf/cm
2,
225—254 psi}
•Is line pressure within specification?
(See K2–72 Line Pressure Test.)Yes Go to next step.
No All ranges: Replace or overhaul oil pump or control valve
body, then go to Step 10.
Any ranges: Replace or overhaul automatic transaxle, then
go to Step 10.
(See K2–99 AUTOMATIC TRANSAXLE AND TRANSFER
REMOVAL/INSTALLATION.)
6CLICK TEST OF SOLENOID VALVES
•Turn ignition key to OFF.
•Disconnect terminal component No.1(12-pin).
•Apply battery voltage to terminal component
No.1 (12-pin) terminals (transaxle case side).
—TCC solenoid vale: B
—Pressure control solenoid: D
•Verify the click sounds of TCC solenoid valve
and pressure control solenoid.
•Are there click sounds?Yes Go to next step.
No Replace TCC solenoid valve or pressure control solenoid,
then go to Step 10.
(See K2–105 CONTROL VALVE BODY REMOVAL/
INSTALLATION.)
7INSPECT DIFFERENCE BETWEEN ENGINE
SPEED AND TURBINE SPEED
•Inspect difference between engine speed and
turbine speed during TCC operation in 5GR
•Drive vehicle under following condition
—TR switch position: D range
—Gear position: 5GR
—TCC solenoid valve: ON
•Is difference between engine speed (RPM PID)
and turbine speed okay?
Difference
Below 99 rpmYes Go to Step
No Go to next step.
8INSPECT OPERATION OF EACH VALVE AND
EACH SPRING
•Remove control valve body.
•Disassemble control valve body.
•Is each valve operation okay and is return
spring okay?Yes Replace torque converter, then go to next step.
No Replace control valve body, then go to next step.
(See K2–105 CONTROL VALVE BODY REMOVAL/
INSTALLATION.)
9VERIFY TROUBLESHOOTING OF DTC P0740
COMPLETED
•Make sure to reconnect all disconnected
connectors.
•Clear DTC from memory using WDS or
equivalent.
•Start engine.
•Warm up ATX.
•Drive vehicle under following condition for 10
seconds or more.
—Vehicle speed (VSS PID): Within 10—87
km/h {6—54 mph}
—Gear position: 5GR
—TR switch position: D range
—TCC solenoid valve: ON
•Is there pending code present?Yes Replace TCM, then go to next step.
(See K2–96 TCM REMOVAL/INSTALLATION.)
No Go to next step.
10VERIFY AFTER REPAIR PROCEDURE
•Perform “After Repair Procedure”.
(See K2–124 AFTER REPAIR PROCEDURE.)
•Is there any DTC present?Yes Go to applicable DTC inspection.
No Troubleshooting completed. STEP INSPECTION ACTION

ELECTRONIC 4WD CONTROL SYSTEM
M–17
M
Memory function
•This function stores DTCs for malfunctions of the input/output signal systems as determined by the failure
detection function. Once a DTC is stored, it is not cleared even if the input/output signal system malfunction
returns to normal when the ignition key is turned to the LOCK position (engine OFF).
•Since DTCs are stored in the non-volatile memory inside the 4WD CM, they are not cleared even if the battery
is disconnected. Therefore, it is necessary to clear the memory when maintenance has been completed. For
clearing DTCs, refer to the procedures in the Workshop Manual.
•When inspecting DTCs using a WDS or equivalent, only one memory stored DTC at a time can be displayed.
Therefore, when multiple DTCs have been stored, it is necessary to inspect for DTCs again after repairing and
clearing the present DTC to ensure that there are no more DTCs present in the memory.
Fail-safe function
•When the failure detection function determines that there is a malfunction, the 4WD warning light illuminates to
alert the driver. At this time, the fail-safe function suspends control or takes other measures to ensure that
driving stability is not lost.
X:Available
*1: Does not illuminate when only the coupling torque request signal from the DSC HU/CM cannot be received.*2: Only integrated DSC control is prohibited when only the coupling torque request signal from the DSC HU/CM
cannot be received.
External tester communication function
•This function allows for the storing and clearing of DTCs due to a communication link between the 4WD CM
and an external tester.
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DTC Malfunction location4WD warning
lightconditionDTC stored in
memoryControl condition
P1887 System wiring Illuminated X Stop
P1888 Differential oil temperature sensor Illuminated X Stop
U0100 PCM communication system Illuminated X Stop
U0101 TCM communication system Illuminated X Stop
U0121 DSC communication system
Illuminated
*1X
Stop*2

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.
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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

ELECTRONIC 4WD CONTROL SYSTEM
M–67
M
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4WD CONTROL MODURE REMOVAL/INSTALLATIONA6E6322271002131. Disconnect the negative (-) battery cable.
2. Remove the lower panel.
3. Remove in the order indicated in the table.
4. Install in the reverse order of removal.
.
End Of Sie
IPower supply
(Ignition
switch)Input Ignition key VoltageIgnition key ON B+•Inspect fuse
•Inspect related
harness Ignition key OFF 1.0 or below
J——— ——— — —
KPower supply
(Main)Input Battery Voltage Any condition B+•Inspect fuse
•Inspect related
harness
L——— ——— — —
M——— ——— — —
N Ground—Ground Voltage Any condition 0•Inspect related
harness
O4WD solenoid
(+)Output 4WD solenoid VoltageIgnition key ON B+•4WD solenoid
•Inspect related
harness Ignition key OFF 1.0 or below
P4WD solenoid
(-)Output 4WD solenoid VoltageIgnition key ON B+•4WD solenoid
•Inspect related
harness Ignition key OFF 1.0 or below Terminal SignalInput/
outputConnected
toMeasuring
itemTest conditionVoltage (V)/
ContinuityInspection location
in case of failure
31
2
31
2
7.8—10.8 {0.8—1.1, 5.6—7.9}
N·m {kgf·m, ft·lbf} 7.8—10.8 {0.8—1.1, 5.6—7.9}
L.H.D.
R.H.D.
A6E63222105
1 Connector
2Nut34WD CM

ON-BOARD DIAGNOSTIC
M–77
M
DTC P1887A6E637027100203
Diagnostic procedure
DTC P1887 System wiring
DETECTION
CONDITION•Current detection circuit in 4WD CM detects current above specification for more than specified period.
•4WD CM detects that 4WD solenoid control signal differs from current detected at current detection
circuit for more than specified period.
•Relay voltage detection circuit detects that voltage does not concur with relay ON/OFF signal for more
than specified period.
POSSIBLE
CAUSE•Open circuit or short to GND in harness between battery and 4WD CM terminal K
•Open circuit or short to GND between 4WD CM terminal O and 4WD solenoid terminal B
•Open circuit between 4WD CM terminal P and 4WD solenoid terminal A
•Open circuit between 4WD CM terminal N and body GND
•Open or short circuit in 4WD CM internal circuit
•ENG+B (10A) fuse malfunction
•4WD solenoid malfunction
•4WD CM malfunction
•Poor connection of connectors (female terminals)
STEP INSPECTION ACTION
1INSPECT 4WD SOLENOID CONDITION
•Turn ignition key to OFF.
•Disconnect 4WD solenoid connector.
•Inspect 4WD solenoid.
(See M–66 4WD SOLENOID INSPECTION)
•Is it okay?Yes Go to next step.
No Replace 4WD solenoid, then go to Step 9.
2INSPECT 4WD SOLENOID TO 4WD CM
(POWER SUPPLY CIRCUIT) FOR OPEN
CIRCUIT
•Disconnect 4WD CM connector.
•Inspect for continuity between 4WD CM
terminal O and 4WD solenoid terminal B.
•Is there continuity?Yes Go to next step.
No Repair or replace harness for open circuit between 4WD CM
and 4WD solenoid, then go to Step 9.
A A
B C
D E
F G
H I
J K
L M
N O
PB K
O B
A
N P BATTERYFUSE (ENG+B 10 A)
4WD CM
4WD CM CONNECTOR4WD SOLENOID
4WD SOLENOID CONNECTOR RELAY

M–78
ON-BOARD DIAGNOSTIC
End Of Sie
3INSPECT 4WD SOLENOID TO 4WD CM
(POWER SUPPLY CIRCUIT) FOR SHORT TO
GROUND
•Inspect for continuity between 4WD CM
terminal O and ground.
•Is there continuity?Yes Repair or replace harness for short to ground between 4WD
CM and 4WD solenoid, then go to Step 9.
No Go to next step.
4INSPECT 4WD SOLENOID TO 4WD CM
(GROUND CIRCUIT) FOR OPEN CIRCUIT
•Inspect for continuity between 4WD CM
terminal P and 4WD solenoid terminal A.
•Is there continuity?Yes Replace 4WD CM, then go to next step.
No Repair or replace harness for open circuit between 4WD CM
and 4WD solenoid, then go to Step 9.
5INSPECT 4WD CM POWER SUPPLY CIRCUIT
FOR OPEN CIRCUIT
•Measure voltage between 4WD CM terminal
K and ground.
•Is voltage B+?Yes Replace 4WD CM, then go to Step 9.
No Go to next step.
6INSPECT 4WD CM TO BATTERY FOR OPEN
CIRCUIT
•Disconnect 4WD CM connector and battery
positive terminal.
•Inspect for continuity between 4WD CM
terminal K and battery positive terminal.
•Is there continuity?Yes Go to next step.
No Repair or replace harness for open circuit between 4WD CM
and battery positive terminal, then go to Step 9.
7INSPECT 4WD CM TO BATTERY FOR SHORT
TO GROUND
•Inspect for continuity between 4WD CM
terminal K and ground.
•Is there continuity?Yes Repair or replace harness for short to ground between 4WD
CM and battery positive terminal, then go to Step 9.
No Replace 4WD CM, then go to step 9.
8INSPECT FUSE CONDITION
•Turn ignition key to OFF.
•Is ENG+B fuse (10A) okay?Yes Go to next step.
No Replace fuse, then go to Step 9.
9VERIFY TROUBLESHOOTING COMPLETED
•Make sure to reconnect all disconnected
connectors.
•Clear DTC from memory.
(See M–76 Clearing DTCs Procedures)
•Drive vehicle.
•Is the same DTC present?Yes Replace 4WD CM, then go to next step.
No Go to next step.
10VERIFY AFTER REPAIR PROCEDURE
•Is there any other DTC present?Yes Go to applicable DTC inspection.
No Troubleshooting completed. STEP INSPECTION ACTION

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