Mazda Mazda6 Workshop Manual Supplement page 131

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