2002 MAZDA 6 oil

CONTROL SYSTEM
F1–37
F1
Without Using the SST
Caution
•The PCM terminal voltages vary with change in measuring conditions and vehicle conditions.
Always carry out a total inspection of the input systems, output systems, and PCM to determine
the cause of trouble. Otherwise, a wrong diagnosis will be made.
1. Measure the voltage at each terminal.
•If any incorrect voltage is detected, inspect the related system(s), wiring harnesses and connector(s)
referring to the Action column in the terminal voltage table.
Terminal voltage table (Reference)
Terminal Signal Connected to Test conditionVoltage
(V)Action
1A IGT1Ignition coil (No. 1,
4 cylinders)•Inspect using the wave profile.
(See F1–44 Inspection Using An
Oscilloscope (Reference).)•Inspect ignition coil
•Inspect related
harness
1B IGT2Ignition coil (No. 2,
3 cylinders)•Inspect using the wave profile.
(See F1–44 Inspection Using An
Oscilloscope (Reference).)•Inspect ignition coil
•Inspect related
harness
1C GND GND Under any condition Below 1.0•Inspect related
harness
1D GND GND Under any condition Below 1.0•Inspect related
harness
1E—— — ——
1F—— — ——
1G BARO BARO sensor Ignition switch ON (at sea level)Approx.
4.1 V•Inspect BARO sensor
•Inspect related
harness
1H—— — ——
1I—— — ——
1JManifold absolute
pressureMAP sensorIgnition switch ON (Engine OFF)Approx.
4.1•Inspect MAP sensor
•Inspect related
harness
IdleApprox.
1.5
1K Brake Brake switchBrake pedal depressed B+•Inspect brake switch
•Inspect related
harness Brake pedal released Below 1.0
1L—— — ——
1M ECT ECT sensorIgnition switch
ONECT 20 °C
{68 °F}3.04—
3.14•Inspect ECT sensor
•Inspect related
harness ECT 60 °C
{140 °F}1.29—
1.39
1N—— — ——
1O—— — ——
1P MAF MAF sensorIgnition switch ONApprox.
0.7•Inspect MAF sensor
•Inspect related
harness
Idle (after warm up)Approx.
1.3
1B 1A
1E 1D
1C 1H 1G 1J
1F 1I 1M
1L 1N 1K 1T 1Q1P 1S
1O 1R 1W1V
1Z 1Y
1X1AC1AB
1AA 1AD1U 2B 2A
2E 2D
2C 2H 2G 2J
2F 2I 2M
2L 2N 2K 2T 2Q2P 2S
2O 2R 2W2V
2Z 2Y
2X2AC2AB
2AA 2AD2U 3B 3A
3E 3D
3C 3H 3G 3J
3F 3I 3M
3L 3N 3K 3T 3Q3P 3S
3O 3R 3W3V
3Z 3Y
3X3AA3U 4B 4A
4E 4D
4C 4H 4G 4J
4F 4I 4M
4L 4N 4K 4T 4Q4P 4S
4O 4R 4W4V
4Z 4Y
4X4AC4AB
4AA 4AD4U
A6A3940W002

F1–38
CONTROL SYSTEM
1QRefrigerant
pressure switch
(middle)Refrigerant
pressure switch
(middle)A/C ONRefrigerant
pressure is
above 1.52
MPaBelow 1.0
•Inspect refrigerant
pressure switch
•Inspect related
harness Refrigerant
pressure is
below 1.23
MPaB+
1RClutch operation*
2Clutch switchClutch pedal depressed Below 1.0•Inspect clutch switch
•Inspect related
harness Clutch pedal released B+
—*
3————
1S—— — ——
1T—— — ——
1U—— — ——
1V—— — ——
1WNeutral position*
2Neutral switchShift lever is at neutral position Below 1.0
•Inspect neutral switch
•Inspect related
harness Shift lever is not at neutral
positionB+
Selector lever
position*
11TR switch
(terminal C)Ignition switch
ONP rangeApprox.
4.6
•Inspect TR switch
•Inspect related
harness R rangeApprox.
3.9
N rangeApprox.
3.2
D range*4
M range*5Approx.
2.5
S range*
4Approx.
1.7
L range*
4Approx.
0.94
—*
12————
1X—— — ——
1Y HO2S (rear) HO2S (rear)Ignition switch ON Approx. 0•Inspect HO2S (rear)
•Inspect related
harness Idle (after warm up) 0—1.0
1Z PSP PSP switch IdleSteering wheel
at straight
ahead positionB+•Inspect PSP switch
•Inspect power
steering system
•Inspect related
harness While turning
steering wheelBelow 1.0
1AAGenerator output
voltageGenerator
(terminal P)•Inspect using the wave profile.
(See F1–44 Inspection Using An
Oscilloscope (Reference).)•Inspect generator
•Inspect related
harness
1AB HO2S (front) HO2S (front)•Inspect using the wave profile.
(See F1–44 Inspection Using An
Oscilloscope (Reference).)•Inspect HO2S (front)
•Inspect related
harness
1AC A/C on signalRefrigerant
pressure switchIdleA/C switch and
fan switch onBelow 1.0•Inspect refrigerant
pressure switch
•Inspect related
harness A/C switch off B+
1ADGenerator field coil
controlGenerator
(terminal D)•Inspect using the wave profile.
(See F1–44 Inspection Using An
Oscilloscope (Reference).)•Inspect generator
•Inspect related
harness
2A Throttle position TP sensorIgnition switch
ONCTP0.65—
1.15•Inspect TP sensor
•Inspect related
harness
WOT 4.3—4.8
2B—— — ——
2C—— — —— Terminal Signal Connected to Test conditionVoltage
(V)Action

CONTROL SYSTEM
F1–39
F1
2D CKP (+) CKP sensor•Inspect using the wave profile.
(See F1–44 Inspection Using An
Oscilloscope (Reference).)•Inspect CKP sensor
•Inspect related
harness
2E IAT MAF/IAT sensorIgnition switch
ONIAT 20 °C
{68 °F}2.4—2.6
•Inspect IAT sensor
•Inspect related
harness IAT 30 °C
{86 °F}1.7—1.9
2F—— — ——
2G CKP (–) CKP sensor•Inspect using the wave profile.
(See F1–44 Inspection Using An
Oscilloscope (Reference).)•Inspect CKP sensor
•Inspect related
harness
2H Sensor GNDMAF/IAT sensor,
HO2S (Front,
Rear), BARO
sensor*
6, ECT
sensor, TP
sensor, MAP
sensor, TFT
sensor, TR switchUnder any condition Below 1.0•Inspect related
harness
2IVSS (–)*
8VSS•Inspect using the wave profile.
(See F1–44 Inspection Using An
Oscilloscope (Reference).)•Inspect VSS sensor
•Inspect related
harness
—*
13————
2J CMP (+) CMP sensor•Inspect using the wave profile.
(See F1–44 Inspection Using An
Oscilloscope (Reference).)•Inspect CMP sensor
•Inspect related
harness
2KConstant voltage
(Vref)MAP sensor, TP
sensor, BARO
sensor*
6Ignition switch ONApprox.
5.0•Inspect related
harness
2LVSS (+)*
8VSS•Inspect using the wave profile.
(See F1–44 Inspection Using An
Oscilloscope (Reference).)•Inspect VSS sensor
•Inspect related
harness
—*
13————
2M CMP (–) CMP sensor•Inspect using the wave profile.
(See F1–44 Inspection Using An
Oscilloscope (Reference).)•Inspect CMP sensor
•Inspect related
harness
2N—— — ——
2O—— — ——
2P Knocking (–) Knock sensorIgnition switch ON (Use digital
type voltmeter, because
measurement voltage will be
detected less than true voltage
when using analog type
voltmeter)Below 1.0•Perform “On-Board
Diagnostic Test”
•Inspect related
harness
2QCoil (Immobilizer
system)*
9CoilBecause this terminal is for communication,
good/no good judgment by terminal voltage
is not possible.•Inspect coil
•Inspect related
harness
—*
10————
2R CAN (–)Instrument cluster,
ABS HU/CM,
ABS/TCS HU/CM,
DSC HU/CM,
TCM*
12
Because this terminal is for CAN, good/no
good judgment by terminal voltage is not
possible.•Inspect related
harness
2S Knocking (+) Knock sensorIgnition switch ON (Use digital
type voltmeter, because
measurement voltage will be
detected less than true voltage
when using analog type
voltmeter)Approx.
4.3•Perform “On-Board
Diagnostic Test”
•Inspect related
harness Terminal Signal Connected to Test conditionVoltage
(V)Action

F1–40
CONTROL SYSTEM
2TCoil*
9 (Immobilizer
system)CoilBecause this terminal is for communication,
good/no good judgment by terminal voltage
is not possible.•Inspect coil
•Inspect related
harness
—*
10————
2U CAN (+)Instrument cluster,
ABS HU/CM,
ABS/TCS HU/CM,
DSC HU/CM,
TCM*
12
Because this terminal is for CAN, good/no
good judgment by terminal voltage is not
possible.•Inspect related
harness
2V—— — ——
2WSecurity light
control*
9Instrument cluster
(Security light)Security light illuminate—
•Inspect related
harness
Others Below 1.0
—*
10————
2X Main relay control Main relayIgnition switch OFF B+•Inspect main relay
•Inspect related
harness Ignition switch ON Below 1.0
2Y B+ Main relayIgnition switch OFF Below 1.0•Inspect battery
•Inspect related
harness Ignition switch ON B+
2ZBack-up power
supplyBattery (positive
terminal)Under any condition B+•Inspect battery
•Inspect related
harness
2AA—— — ——
2AB GND GND Under any condition Below 1.0•Inspect related
harness
2AC GND GND Under any condition Below 1.0•Inspect related
harness
2AD—— — ——
3A—— — ——
3B—— — ——
3CVehicle speed*
3VSS•Inspect using the wave profile.
(See F1–44 Inspection Using An
Oscilloscope (Reference).)•Inspect VSS
•Inspect related
harness
—*
13————
3DATF temperature*
11TFT sensorIgnition switch
ONTFT 20 °C
{68 °F}Approx.
3.3
•Inspect TFT sensor
•Inspect related
harness TFT 40 °C
{104 °F}Approx.
2.4
TFT 60 °C
{140 °F}Approx.
1.5
—*
14————
3E—— — ——
3F—— — ——
3GInput/turbine speed
sensor (+)*
11Input/turbine
speed sensor•Inspect using the wave profile.
(See F1–44 Inspection Using An
Oscilloscope (Reference).)•Inspect input/turbine
speed sensor
•Inspect related
harness
—*
14————
3H—— — ——
3I—— — ——
3JInput/turbine speed
sensor (–)*
11Input/turbine
speed sensor•Inspect using the wave profile.
(See F1–44 Inspection Using An
Oscilloscope (Reference).)•Inspect input/turbine
speed sensor
•Inspect related
harness
—*
14———— Terminal Signal Connected to Test conditionVoltage
(V)Action

CONTROL SYSTEM
F1–41
F1
3KManual down*
5, 11Down switch
Ignition switch
ONDetects down-
shift operation
of selector lever
in M range
Below 1.0
•
Inspect down switch
• Inspect related
harness
Others B+
—*
14————
3L — — — — —
3M — — — — —
3N Manual up*
5, 11Up switch
Ignition switch
ONDetects up-shift
operation of
selector lever in
M range
Below 1.0
•
Inspect up switch
• Inspect related
harness
Others B+
—*
14————
3O — — — — —
3P Shift solenoid E
control*
11Shift solenoid E Detects TCC operation B+
•Inspect shift solenoid
E
• Inspect related
harness
Others Below 1.0
—*
14————
3Q HOLD*
4, 11HOLD switch
Ignition switch
ONHOLD switch
pushed
Below 1.0
•
Inspect HOLD switch
• Inspect related
harness
Others B+
M range*
5, 11M range switch Ignition switch
ONManual mode Below 1.0
•Inspect M range
switch
• Inspect related
harness
Others B+
—*
14————
3R — — — — —
3S Shift solenoid D
control*
11Shift solenoid D Selector lever is at P, N position B+
•Inspect shift solenoid
D
• Inspect related
harness
Others Below 1.0
—*
14————
3T Oil pressure*
11Oil pressure
switch Oil pressure switch ON Below 1.0
•Inspect oil pressure
switch
• Inspect related
harness
Oil pressure switch OFF
B+
—*
14————
3U — — — — —
3V Pressure control
solenoid (–)*
11Pressure control
solenoid valve •
Inspect using the wave profile.
(See F 1–4 4 In sp ectio n U sing A n
O scillo sc o pe ( Refe ren ce ).) •
Inspect pressure
control solenoid valve
• Inspect related
harness
—*
14————
3W — — — — — 3X — — — — —
3Y Pressure control
solenoid (+)*
11Pressure control
solenoid valve •
Inspect using the wave profile.
(See F 1–4 4 In sp ectio n U sing A n
O scillo sc o pe ( Refe ren ce ).) •
Inspect pressure
control solenoid valve
• Inspect related
harness
—*
14————
3Z — — — — —
3AA — — — — —
4A HO2S (Front)
heater control HO2S (Front)
heater•
Inspect using the wave profile.
(See F 1–4 4 In sp ectio n U sing A n
O scillo sc o pe ( Refe ren ce ).) •
Inspect HO2S (Front)
heater.
• Inspect related
harness
Terminal Signal Connected to Test condition
Voltage
(V) Action

F1–42
CONTROL SYSTEM
4B Cooling fan control Cooling fan relay IdlingECT below 100
°C {212 °F}B+•Inspect cooling fan
relay
•Inspect related
harness A/C operating Below 1.0
4CVAD control*
5VAD control
solenoid valveIgnition switch
ONEngine speed
below 5,800
rpmB+
•Inspect VAD control
solenoid valve
•Inspect related
harness Engine speed
above 5,800
rpmBelow 1.0
—*
7————
4DHO2S (Rear) heater
controlHO2S (Rear)
heaterIgnition switch
ONEngine speed
below 4,000
rpmB+
•Inspect HO2S (Front)
heater.
•Inspect related
harness Engine speed
above 4,000
rpmBelow 1.0
4EEGR valve #1 coil
controlEGR valve
(terminal E)Ignition switch ON Below 1.0•Inspect EGR valve
•Inspect related
harness Idle Below 1.0
4F Cooling fan control Cooling fan relay IdlingECT below 100
°C {212 °F}B+
•Inspect cooling fan
relay
•Inspect related
harness A/C operating
and refrigerant
pressure switch
(middle) ONBelow 1.0
4G IAC (+) IAC valve•Inspect using the wave profile.
(See F1–44 Inspection Using An
Oscilloscope (Reference).)•Inspect IAC valve
•Inspect related
harness
4HEGR valve #2 coil
controlEGR valve
(terminal A)Ignition switch ON B+•Inspect EGR valve
•Inspect related
harness Idle B+
4I Starter relay controlStarter relay
(MTX)
TR switch (ATX)Under any condition Below 1.0•Perform “On-Board
Diagnostic Test”
•Inspect related
harness
4J IAC (–)IAC valve•Inspect using the wave profile.
(See F1–44 Inspection Using An
Oscilloscope (Reference).)•Inspect IAC valve
•Inspect related
harness
4KEGR valve #3 coil
controlEGR valve
(terminal B)Ignition switch ON B+•Inspect EGR valve
•Inspect related
harness Idle B+
4L Cooling fan control Cooling fan relay IdlingECT below 100
°C {212 °F}B+•Inspect cooling fan
relay
•Inspect related
harness A/C operating Below 1.0
4MOCV control*
5OCV•Inspect using the wave profile.
(See F1–44 Inspection Using An
Oscilloscope (Reference).)•Inspect OCV valve
•Inspect related
harness
—*
7————
4NEGR valve #4 coil
controlEGR valve
(terminal F)Ignition switch ON Below 1.0•Inspect EGR valve
•Inspect related
harness Idle Below 1.0
4O A/C A/C relayA/C operating Below 1.0•Inspect A/C relay
•Inspect related
harness A/C not operating B+
4PFuel pump
control*
10Fuel pump relayIgnition switch ON B+•Inspect fuel pump
relay
•Inspect related
harness Cranking Below 1.0
Idle Below 1.0
—*
9———— Terminal Signal Connected to Test conditionVoltage
(V)Action

CONTROL SYSTEM
F1–45
F1
Generator field coil control signal
PCM terminals
•1AD(+)—1C(–)
Oscilloscope setting
•0.5 V/DIV (Y), 1 ms/DIV (X), DC range
Vehicle condition
•Idle after warm up (engine speed approx. 650
rpm [MTX] or 700 rpm [ATX], no load, P/S off, A/C
off)
CKP sensor signal
(+)
PCM terminals
•2D(+)—2H(–)
Oscilloscope setting
•2 V/DIV (Y), 4 ms/DIV (X), DC range
Vehicle condition
•Idle after warm up (engine speed approx. 650
rpm [MTX] or 700 rpm [ATX], no load, P/S off, A/C
off)
(–)
PCM terminals
•2G(+)—2H(–)
Oscilloscope setting
•2 V/DIV (Y), 4 ms/DIV (X), DC range
Vehicle condition
•Idle after warm up (engine speed approx. 650
rpm [MTX] or 700 rpm [ATX], no load, P/S off, A/C
off)
VSS signal
PCM terminals
•3C(+)—2AC(–)
Oscilloscope setting
•1 V/DIV (Y), 10 ms/DIV (X), DC range
Vehicle condition
•Drive the vehicle with approx. 10 km/h {6.2 mph}
0 V
A6A3940W006
0 V
A6A3940W007
0 V
A6A3940W008
0 V
A6A3940W011

ON-BOARD DIAGNOSTIC
F1–51
F1
P0112 IAT circuit low input ON 1 CCM×
P0113 IAT circuit high input ON 1 CCM×
P0117 ECT circuit low input ON 1 CCM×
P0118 ECT circuit high input ON 1 CCM×
P0121 TP stuck closed ON 2 CCM×
P0122 TP circuit low input ON 1 CCM×
P0123 TP circuit high input ON 1 CCM×
P0125 Excessive time to enter closed loop fuel control ON 2 CCM×
P0131 Front HO2S no inversion (stuck low) ON 2 CCM×
P0132 Front HO2S no inversion (stuck high) ON 2 CCM×
P0133 Front HO2S circuit malfunction ON 2O
2 sensor
×
P0134 Front HO2S circuit no activity detected ON 2 CCM×
P0138 Rear HO2S circuit high input ON 2 CCM×
P0140 Rear HO2S circuit no activity detected ON 2 CCM×
P0171 Fuel trim system too lean ON 2 Fuel×
P0172 Fuel trim system too rich ON 2 Fuel×
P0300 Random misfire detected Flash / ON 1 or 2 Misfire×
P0301 Cylinder No.1 misfire detected Flash / ON 1 or 2 Misfire×
P0302 Cylinder No.2 misfire detected Flash / ON 1 or 2 Misfire×
P0303 Cylinder No.3 misfire detected Flash / ON 1 or 2 Misfire×
P0304 Cylinder No.4 misfire detected Flash / ON 1 or 2 Misfire×
P0327 Knock sensor circuit low input ON 1 CCM×
P0328 Knock sensor circuit high input ON 1 CCM×
P0335 CKP sensor circuit malfunction ON 1 CCM×
P0340 CMP sensor circuit malfunction ON 1 CCM×
P0403 EGR valve motor coils open or short ON 2 CCM×
P0420 Catalyst system efficiency below threshold ON 2 Catalyst×
P0443Evaporative emission control system purge control
valve circuit malfunctionON 2 CCM×
P0480 Fan relay control circuit malfunction OFF 2 Other×
P0500 Vehicle speed sensor (VSS) circuit malfunction ON 2 CCM×
P0505 Idle control system malfunction OFF—Other—
P0506 Idle control system RPM lower than expected ON 2 CCM×
P0507 Idle control system RPM higher than expected ON 2 CCM×
P0511 Idle control system circuit malfunction ON 1 CCM×
P0550 PSP switch circuit malfunction ON 2 CCM×
P0602 PCM programming error ON 1 CCM×
P0610 Control module vehicle options error ON 1 CCM×
P0661 VIS control circuit low input OFF 2 Other×
P0662 VIS control circuit high input OFF 2 Other×
P0703 Brake switch input malfunction ON 2 CCM×
P0704 Clutch switch input malfunction ON 2 CCM×
P0850 Neutral switch input malfunction ON 2 CCM×
P1410 Variable air duct valve circuit malfunction OFF 2 Other×
P1562 PCM +BB voltage low ON 1 CCM×
P2006 Variable tumble control shutter valve stuck closed ON 2 CCM×
P2009 Variable tumble control solenoid circuit low input ON 2 CCM×
P2010 Variable tumble control solenoid circuit high input ON 2 CCM×
P2228 BARO sensor circuit low input ON 1 CCM×
P2229 BARO sensor circuit high input ON 1 CCM×
P2502 Generator output voltage signal no electricity OFF 1 Other—
P2503 Battery overcharge OFF 1 Other—
P2504 Generator terminal B circuit open OFF 1 Other—
U0073 CAN bus off OFF 1 Other— DTC No. Condition MIL DC Monitor itemMemory
function