2002 MAZDA 6 Workshop Manual Suplement

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
F1–43
F1
*1: Calculated value; differs from terminal voltage
*2: MTX models
*3: ATX models
*4: LF engine models
*5: L3 engine models
4QFuel pump control*
9Fuel pump relayIgnition switch ON B+•Inspect fuel pump
relay
•Inspect related
harness Cranking Below 1.0
Idle Below 1.0
—*
10————
4RVIC control*
5VIC control
solenoid valveEngine speed: above 4,500 rpm B+•Inspect VIC solenoid
valve
•Inspect related
harness Engine speed: below 4,500 rpm Below 1.0
—*
7————
4S—— — ——
4TVariable tumble
controlVariable tumble
control solenoid
valveECT above 63 °C { 145 °F} while
idling.B+•Inspect variable
tumble control
solenoid valve
•Inspect related
harness ECT below 63 °C {145 °F} and
engine speed below 3,750 rpmBelow 1.0
4U Purge controlPurge solenoid
valve•Inspect using the wave profile.
(See F1–44 Inspection Using An
Oscilloscope (Reference).)•Inspect purge
solenoid valve
•Inspect related
harness
4VB+*
3Main relayIgnition switch OFF Below 1.0•Inspect battery
•Inspect related
harness Ignition switch ON B+
—— — ——
4W Fuel injection (#2) Fuel injector No.2•Inspect using the wave profile.
(See F1–44 Inspection Using An
Oscilloscope (Reference).)•Inspect fuel injector
No.2
•Inspect related
harness
4X GND GND Under any condition Below 1.0•Inspect related
harness
4YShift solenoid C
control*
11Shift solenoid C•Inspect using the wave profile.
(See F1–44 Inspection Using An
Oscilloscope (Reference).)•Inspect shift solenoid
C
•Inspect related
harness
—*
14————
4Z Fuel injection (#1) Fuel injector No.1•Inspect using the wave profile.
(See F1–44 Inspection Using An
Oscilloscope (Reference).)•Inspect fuel injector
No.1
•Inspect related
harness
4AA Fuel injection (#4) Fuel injector No.4•Inspect using the wave profile.
(See F1–44 Inspection Using An
Oscilloscope (Reference).)•Inspect fuel injector
No.4
•Inspect related
harness
4ABShift solenoid A
control*
11Shift solenoid A•Inspect using the wave profile.
(See F1–44 Inspection Using An
Oscilloscope (Reference).)•Inspect shift solenoid
A
•Inspect related
harness
—*
14————
4ACShift solenoid B
control*
11Shift solenoid B•Inspect using the wave profile.
(See F1–44 Inspection Using An
Oscilloscope (Reference).)•Inspect shift solenoid
B
•Inspect related
harness
—*
14————
4AD Fuel injection (#3) Fuel injector No.3•Inspect using the wave profile.
(See F1–44 Inspection Using An
Oscilloscope (Reference).)•Inspect fuel injector
No.3
•Inspect related
harness Terminal Signal Connected to Test conditionVoltage
(V)Action

F1–44
CONTROL SYSTEM
*6: Unleaded fuel (RON 90 or above) models
*7: Exclude L3 engine models
*8: MTX, without ABS models
*9: Immobilizer system equipped
*10: Immobilizer system not equipped
*11: 2WD ATX models
*12: 4WD ATX models
*13: Exclude MTX models without ABS
*14: Exclude 2WD ATX models
Inspection Using An Oscilloscope (Reference)
IGT1, IGT2 control signals
PCM terminals
•IGT1(No.1 and No.4): 1A(+)—1D(–)
•IGT2(No.2 and No.3): 1B(+)—1C(–)
Oscilloscope setting
•4 V/DIV (Y), 0.01 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)
Generator output voltage signal
PCM terminals
•1AA(+)—2AC(–)
Oscilloscope setting
•2 V/DIV (Y), 2 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)
HO2S (front) signal
PCM terminals
•1AB(+)—2H(–)
Oscilloscope setting
•0.1 V/DIV (Y), 400 ms/DIV (X), DC range
Vehicle condition
•Idle after warm up (engine speed approx. 650
rpm [MTX], 700 rpm [ATX], no load, P/S off, A/C
off)
0 V
A6A3940W003
0 V
A6A3940W004
0 V
A6A3940W005

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

F1–46
CONTROL SYSTEM
CMP sensor signal
L3 engine (+)
PCM terminals
•2J(+)—2H(–)
Oscilloscope setting
•1 V/DIV (Y), 10 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)
LF engine (+)
PCM terminals
•2J(+)—2H(–)
Oscilloscope setting
•1 V/DIV (Y), 10 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)
L3 engine (–)
PCM terminals
•2M(+)—2H(–)
Oscilloscope setting
•1 V/DIV (Y), 10 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)
LF engine (–)
PCM terminals
•2M(+)—2H(–)
Oscilloscope setting
•1 V/DIV (Y), 10 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)
0 V
A6A3940W012
0 V
A6A3940W013
0 V
A6A3940W014
0 V
A6A3940W015

CONTROL SYSTEM
F1–47
F1
Input/turbine speed sensor signal
PCM terminals
•3G(+)—2AC(–)
Oscilloscope setting
•500 mV/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)
Pressure control solenoid signal
(–)
PCM terminals
•3V(+)—1C(–)
Oscilloscope setting
•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)
(+)
PCM terminals
•3Y(+)—1C(–)
Oscilloscope setting
•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)
HO2S (front) heater control signal
PCM terminals
•4A(+)—1C(–)
Oscilloscope setting
•4 V/DIV (Y), 200 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)
0 V
A6A3940W016
0 V
A6A3940W017
0 V
A6A3940W018
0 V
A6A3940W019

F1–48
CONTROL SYSTEM
IAC signal
(+)
PCM terminals
•4G(+)—1C(–)
Oscilloscope setting
•2 V/DIV (Y), 0.4 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
•4J(+)—1C(–)
Oscilloscope setting
•2 V/DIV (Y), 0.4 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)
OCV control signal
PCM terminals
•4M(+)—1C(–)
Oscilloscope setting
•2 V/DIV (Y), 0.8 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)
Purge control signal
PCM terminals
•4U(+)—1C(–)
Oscilloscope setting
•1 V/DIV (Y), 10 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)
0 V
A6A3940W020
0 V
A6A3940W021
0 V
A6A3940W022
0 V
A6A3940W023