Mazda 2002 6 - Page 171

CONTROL SYSTEM
F–48–8
4F Cooling fan control Cooling fan relay Idling
ECT below 100
°C {212 °F}
B+
• Inspect cooling fan
relay
• Inspect related
harness
A/C operating
and refrigerant
pressure switch
(middle) ON
Below 1.0
4G IAC (+) IAC valve
• Inspect using the wave profile.
(See F–48–10 Inspection Using An
Oscilloscope (Reference).)
• Inspect IAC valve
(See F–13 IDLE AIR
CONTROL (IAC)
VALVE INSPECTION)
• Inspect related
harness
4H
EGR valve #2 coil
control
EGR valve
(terminal A)
Ignition switch ON B+ • Inspect EGR valve
(See F–40 EGR
VALVE INSPECTION)
• Inspect related
harness
Idle B+
4I Starter relay control
Starter relay*
1
TR switch*
2
Under any condition Below 1.0
• Perform “On-Board
Diagnostic Test”
(See F–62
ON-BOARD
DIAGNOSTIC TEST)
• Inspect related
harness
4J IAC (–)IAC valve
• Inspect using the wave profile.
(See F–48–10 Inspection Using An
Oscilloscope (Reference).)
• Inspect IAC valve
(See F–13 IDLE AIR
CONTROL (IAC)
VALVE INSPECTION)
• Inspect related
harness
4K
EGR valve #3 coil
control
EGR valve
(terminal B)
Ignition switch ON B+ • Inspect EGR valve
(See F–40 EGR
VALVE INSPECTION)
• Inspect related
harness
Idle B+
4L Cooling fan control Cooling fan relay Idling
ECT below 100
°C {212 °F}
B+
• Inspect cooling fan
relay
• Inspect related
harness
A/C operating Below 1.0
4M*
4
OCV control OCV
• Inspect using the wave profile.
(See F–48–10 Inspection Using An
Oscilloscope (Reference).)
• Inspect OCV valve
(See B–33 OIL
CONTROL VALVE
(OCV) INSPECTION)
• Inspect related
harness
4N
EGR valve #4 coil
control
EGR valve
(terminal F)
Ignition switch ON Below 1.0 • Inspect EGR valve
(See F–40 EGR
VALVE INSPECTION)
• Inspect related
harness
Idle Below 1.0
4O A/C A/C relay
A/C operating Below 1.0 • Inspect A/C relay
• Inspect related
harness
A/C not operating B+
4P*
7
Fuel pump control Fuel pump relay
Ignition switch ON B+ • Inspect fuel pump
relay
• Inspect related
harness
Cranking Below 1.0
Idle Below 1.0
4Q*
6
Fuel pump control Fuel pump relay
Ignition switch ON B+ • Inspect fuel pump
relay
• Inspect related
harness
Cranking Below 1.0
Idle Below 1.0
Terminal Signal Connected to Test condition
Voltage
(V)
Action