2002 MAZDA 6 fuse

F2–60
EMISSION SYSTEM
EGR SOLENOID VALVE (VACUUM) INSPECTIONA6E401618741201
Note
•Perform the following inspection only when directed.
1. Inspect airflow between the ports under the
following conditions.
•If not as specified, replace the EGR solenoid
valve (vacuum).
•If as specified, carry out the “Circuit Open/
Short Inspection”.
Circuit Open/Short Inspection
1. Inspect the following wiring harness for open or
short (continuity check).
Open circuit
•If there is no continuity, the circuit is open. Repair
or replace the harness.
—EGR solenoid valve (vacuum) terminal A
(harness-side) and PCM control relay
terminal C (harness-side)
—EGR solenoid valve (vacuum) terminal B
(harness-side) and PCM terminal 99
Short circuit
•If there is continuity, the circuit is shorted. Repair
or replace the harness.
—EGR solenoid valve (vacuum) terminal A (harness-side) and GND
—EGR solenoid valve (vacuum) terminal B (harness-side) and power supply
End Of Sie
EGR SOLENOID VALVE (VENT) INSPECTIONA6E401618741202
Note
•Perform the following inspection only when directed.
1. Inspect airflow between the ports under the
following conditions.
•If not as specified, replace the EGR solenoid
valve.
•If as specified, carry out the “Circuit Open/
Short Inspection”.
BAA B
A6E40162001
StepTerminal
ABAB Por t
1
2
B+GND: Airflow
: Continuity
A6E40162020
EGR SOLENOID VALVE
HARNESS SIDE CONNECTORFUSE BOX
(PCM CONTROL RELAY)
A
BA
E
C
D
A6E40162002
BA
CBA
A6E40162003
Step
1
2
A
BAB
C Por t
Terminal
: Airflow
B+
GND: Continuity
A6E40162021

EMISSION SYSTEM
F2–61
F2
Circuit Open/Short Inspection
1. Inspect the following wiring harness for an open
or short circuit (continuity check).
Open circuit
•If there is no continuity, the circuit is open, Repair
or replace the harness.
—EGR solenoid valve (vent) terminal A
(harness-side) and PCM control relay
terminal C (harness-side)
—EGR solenoid valve (vent) terminal B
(harness-side) and PCM terminal 72
Short circuit
•If there is continuity, the circuit is shorted. Repair
or replace the harness.
—EGR solenoid valve (vent) terminal A (harness-side) and GND
—EGR solenoid valve (vent) terminal B (harness-side) and power supply
End Of Sie
EGR CONTROL SOLENOID VALVE INSPECTIONA6E401618741203
Note
•Perform the following inspection only when directed.
1. Inspect airflow between the ports under the
following conditions.
•If not as specified, replace the EGR control
solenoid valve.
•If as specified, carry out the “Circuit Open/
Short Inspection”.
Circuit Open/Short inspection
1. Inspect the following wiring harness for an open
or short circuit (continuity check).
Open circuit
•If there is no continuity, the circuit is open. Repair
or replace the harness.
—EGR control solenoid valve terminal A
(harness-side) and PCM control relay
terminal C (harness-side)
—EGR control solenoid valve terminal B
(harness-side) and PCM terminal 77
Short circuit
•If there is continuity, the circuit is shorted. Repair
or replace the harness.
—EGR control solenoid valve terminal A (harness-side) and GND
—EGR control solenoid valve terminal B (harness-side) and power supply
End Of Sie
EGR SOLENOID VALVE(VENT)
HARNESS SIDE CONNECTORFUSE BOX
(PCM CONTROL RELAY)
BAA
C
DE
A6E40162004
B
AA
B
A6E40162005
StepTerminalPor t
: Airflow
ABAB
GND
B+
1
2
: Continuity
A6E40162022
EGR CONTROL SOLENOID VALVE
HARNESS SIDE CONNECTORFUSE BOX
(MAIN RELAY)
BAAE
C
D
A6E40162006

EMISSION SYSTEM
F2–63
F2
INTAKE SHUTTER SOLENOID VALVE INSPECTIONA6E401613937201
Note
•Perform the following inspection only when directed.
•The inspection includes both intake shutter solenoid valve (half) and intake shutter solenoid valve (full).
1. Inspect airflow between the ports under the following conditions.
•If not as specified, replace the intake shutter solenoid valve.
•If as specified, carry out the “Circuit Open/Short Inspection”.
Intake Shutter Solenoid Valve (Half) Circuit Open/
Short Inspection
1. Disconnect the PCM connector. (See F2–64 PCM
REMOVAL/INSTALLATION.)
2. Inspect the following wiring harness for an open
or short circuit (continuity check).
Open circuit
•If there is no continuity, the circuit is open. Repair
or replace the harness.
—Intake shutter solenoid valve (half) terminal A
(harness-side) and PCM control relay
terminal C (harness-side)
—Intake shutter solenoid valve (half) terminal B
(harness-side) and PCM terminal 74
Short circuit
•If there is continuity, the circuit is shorted. Repair or replace the harness.
—Intake shutter solenoid valve (half) terminal A (harness-side) and GND
—Intake shutter solenoid valve (half) terminal B (harness-side) and power supply
Intake Shutter Solenoid Valve (Full) Circuit Open/Short Inspection
1. Disconnect the PCM connector. (See F2–64 PCM REMOVAL/INSTALLATION.)
2. Inspect the following wiring harness for an open
or short circuit (continuity check).
Open circuit
•If there is no continuity, the circuit is open. Repair
or replace the harness.
—Intake shutter solenoid valve (full) terminal A
(harness-side) and PCM control relay
terminal C (harness-side)
—Intake shutter solenoid valve (full) terminal B
(harness-side) and PCM terminal 100
Short circuit
•If there is continuity, the circuit is shorted. Repair or replace the harness.
—Intake shutter solenoid valve (full) terminal A (harness-side) and GND
—Intake shutter solenoid valve (full) terminal B (harness-side) and power supply
End Of Sie
B
A
CB
A
A6E40162024
StepTerminal
C B
A B APor t: Airflow
1
2B+ GND
: Continuity
A6E40162023
INTAKE SHUTTER SOLENOID
VALVE (HALF)
HARNESS SIDE CONNECTORFUSE BOX
(PCM CONTROL RELAY)
B
AA
E
C
D
A6E40162010
INTAKE SHUTTER SOLENOID
VALVE (FULL)
HARNESS SIDE CONNECTORFUSE BOX
(PCM CONTROL RELAY)
B
AA
C
DE
A6E40162011

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

ON-BOARD DIAGNOSTIC
F2–143
F2
DTC P0380A6E407001082233
Diagnostic procedure
DTC P0380 Glow plug relay circuit malfunction
DETECTION
CONDITION•PCM monitors input voltage from glow plug relay while engine is running. PCM determines glow plug relay
circuit malfunction if input voltage from glow plug relay is as following:
—1.0 V or below when glow plug relay is on.
—4.0 V or above when glow plug relay is off.
POSSIBLE
CAUSE•Glow plug relay malfunction
•Connector or terminal malfunction
•Short to GND in wiring between glow plug relay terminal D and PCM terminal 68
•Short to GND in wiring between glow plug fuse and glow plug relay terminal A
•Short to GND in wiring between glow plug relay terminal C and PCM terminal 86
•Short to power circuit in wiring between glow plug relay terminal D and PCM terminal 68
•Short to power circuit in wiring between glow plug relay terminal C and PCM terminal 86
•Glow plug relay power and signal circuits short each other
•Open circuit in wiring between glow plug fuse and glow plug relay terminal A
•Open circuit in wiring between glow plug relay terminal B and GND
•Open circuit in wiring between glow plug relay terminal D and PCM terminal 68
•Open circuit in wiring between glow plug relay terminal C and PCM terminal 86
•PCM malfunction
STEP INSPECTION ACTION
1VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
•Check for related Service Information
availability.
•Is any related repair information available?Yes Perform repair or diagnosis according to available Service
Information.
•If vehicle is not repaired, go to next step.
No Go to next step.
2INSPECT POOR CONNECTION OF GLOW
PLUG RELAY CONNECTOR
•Turn engine switch to OFF.
•Inspect for poor connection (damaged, pulled-
out terminals, corrosion, etc.).
•Is there any malfunction?Yes Repair or replace suspected terminal, go to Step 9.
No Go to next step.
A
B
C
D
GLOW FUSE
GLOW PLUG RELAY
AD
BC
6886
68 86PCM
54362
262
23598
4398
PCM
HARNESS SIDE CONNECTOR
7
GLOW PLUG RELAY
HARNESS SIDE CONNECTOR

F2–144
ON-BOARD DIAGNOSTIC
End Of Sie
3INSPECT GLOW PLUG RELAY CIRCUIT FOR
SHORT TO GND
•Turn engine switch to OFF.
•Inspect continuity between following
harnesses:
—Glow plug relay terminal A and body GND.
—Glow plug relay terminal C and body GND.
—Glow plug relay terminal D and body GND.
•Is there continuity?Yes Repair or replace harness for short to GND, go to Step 9.
No Go to next step.
4INSPECT GLOW PLUG RELAY CIRCUIT FOR
SHORT TO POWER
•Turn engine switch to ON (Engine OFF).
•Inspect voltage between following harnesses:
—Glow plug relay terminal C and body GND.
—Glow plug relay terminal D and body GND.
•Is voltage below 1.0 V?Yes Go to next step.
No Repair or replace harness for short to power, go to Step 9.
5INSPECT GLOW PLUG RELAY CIRCUIT FOR
SHORT WITH EACH OTHER
•Turn engine switch to OFF.
•Inspect continuity between glow plug relay
terminals A and C.
•Is there continuity?Yes Repair or replace harness for short with each other, go to
Step 7.
No Go to next step.
6INSPECT GLOW PLUG RELAY CIRCUIT FOR
OPEN
•Turn engine switch to OFF.
•Inspect continuity between following
harnesses:
—Glow plug fuse and glow plug relay terminal
A.
—Glow plug relay terminal B and body GND.
•Is there continuity?Yes Go to next step.
No Repair or replace harness for open, go to Step 9.
7INSPECT GLOW PLUG RELAY
•Inspect glow plug relay.
(See T–19 RELAY INSPECTION)
•Is there any malfunction?Yes Replace glow plug relay, go to Step 9.
No Go to next step.
8INSPECT POOR CONNECTION OF PCM
CONNECTOR
•Turn engine switch to OFF.
•Inspect for poor connection (damaged, pulled-
out terminals, corrosion, etc.).
•Is there any malfunction?Yes Repair or replace suspected terminal, go to Step 9.
No Go to next step.
9INSPECT GLOW PLUG RELAY CIRCUIT FOR
OPEN
•Turn engine switch to OFF.
•Inspect continuity between following
harnesses:
—Glow plug relay terminal D and PCM
terminal 68.
—Glow plug relay terminal C and PCM
terminal 86.
•Is there continuity?Yes Go to next step.
No Repair or replace harness for open, go to next step.
10VERIFY TROUBLESHOOTING OF DTC P0380
COMPLETED
•Make sure to reconnect all disconnected
connectors.
•Clear DTC from PCM memory using WDS or
equivalent.
•Start engine.
•Is same DTC present?Yes Replace PCM, go to next step.
(See F2–64 PCM REMOVAL/INSTALLATION)
No Go to next step.
11VERIFY AFTER REPAIR PROCEDURE
•Perform “After Repair Procedure”.
(See F2–86 AFTER REPAIR PROCEDURE)
•Is there any DTC present?Yes Go to applicable DTC inspection.
(See F2–87 DTC TABLE)
No Troubleshooting completed. STEP INSPECTION ACTION

ON-BOARD DIAGNOSTIC
F2–145
F2
DTC P0504A6E407001082234
Diagnostic procedure
DTC P0504 Brake switch signal correlation malfunction
DETECTION
CONDITION•PCM monitors input signal from brake switch 1 and brake switch 2 while engine is running. PCM
determines brake switch signal correlation malfunction if input signal from brake switch 1 brake switch 2 is
as following:
—Brake switch 1 is ON and brake switch 2 is ON.
—Brake switch 1 is OFF and brake switch 2 is OFF.
POSSIBLE
CAUSE•Brake switch malfunction
•Connector or terminal malfunction
•Open circuit in wiring between main fuse and brake switch terminal B
•Open circuit in wiring between brake switch terminal D and PCM terminal 7
•Short to power circuit in wiring between brake switch terminal D and PCM terminal 7
•Open circuit in wiring between brake switch terminal C and GND
•Short to GND in wiring between brake switch terminal A and PCM terminal 34
•Open circuit in wiring between brake switch terminal A and PCM terminal 34
•PCM malfunction
STEP INSPECTION ACTION
1VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
•Check for related Service Information
availability.
•Is any related repair information available?Yes Perform repair or diagnosis according to available Service
Information.
•If vehicle is not repaired, go to next step.
No Go to next step.
2CLASSIFY MALFUNCTION OF BRAKE SWITCH
1 OR BRAKE SWITCH 2
•Turn engine switch to ON (Engine OFF).
•Access BOO PID using WDS or equivalent.
•Verify that BOO PID is changed according to
brake pedal condition.
(See F2–65 PCM INSPECTION)
•Is BOO PID okay?Yes Go to Step 15.
No Go to next step.
3CLASSIFY HIGH INPUT OR LOW INPUT
•Turn engine switch to ON (Engine OFF).
•Access BOO PID using WDS or equivalent.
•Verify BOO PID during brake pedal operation.
•Is BOO PID always OFF?Yes Go to next step.
No Go to Step 10.
MAIN FUSE
BRAKE SWITCH
A B
CD
BRAKE SWITCHPCM
7
34
PCM
HARNESS SIDE CONNECTOR
HARNESS SIDE CONNECTOR
A
B C
D
7 34
4
6
7
8
910
4
10
12
1918
17
1516
1413
2015

F2–146
ON-BOARD DIAGNOSTIC
4INSPECT POOR CONNECTION OF BRAKE
SWITCH 1 CONNECTOR
•Turn engine switch to OFF.
•Inspect for poor connection (damaged, pulled-
out terminals, corrosion, etc.).
•Is there any malfunction?Yes Repair or replace suspected terminal, go to Step 21.
No Go to next step.
5CLASSIFY MALFUNCTION OF BRAKE SWITCH
1 OR CIRCUIT
•Connect a jumper wire between brake switch
terminals B and D.
•Turn engine switch to ON (Engine OFF).
•Access BOO PID using WDS or equivalent.
•Is BOO PID ON?Yes Go to next step.
No Go to Step 7.
6INSPECT BRAKE SWITCH 1
•Inspect brake switch 1.
•Is there any malfunction?Yes Replace brake switch, go to Step 21.
No Go to Step 21.
7INSPECT BRAKE SWITCH 1 POWER CIRCUIT
FOR OPEN
•Turn engine switch to OFF.
•Inspect continuity between main fuse and
brake switch terminal B.
•Is there continuity?Yes Go to next step.
No Repair or replace harness for open, go to Step 21.
8INSPECT POOR CONNECTION OF PCM
CONNECTOR
•Turn engine switch to OFF.
•Inspect for poor connection (damaged, pulled-
out terminals, corrosion, etc.).
•Is there any malfunction?Yes Repair or replace suspected terminal, go to Step 21.
No Go to next step.
9INSPECT BRAKE SWITCH 1 SIGNAL CIRCUIT
FOR OPEN
•Turn engine switch to OFF.
•Inspect continuity between brake switch
terminal D and PCM terminal 7.
•Is there continuity?Yes Go to Step 21.
No Repair or replace harness for open, go to Step 21.
10INSPECT POOR CONNECTION OF BRAKE
SWITCH 1 CONNECTOR
•Turn engine switch to OFF.
•Inspect for poor connection (damaged, pulled-
out terminals, corrosion, etc.).
•Is there any malfunction?Yes Repair or replace suspected terminal, go to Step 21.
No Go to next step.
11CLASSIFY MALFUNCTION OF BRAKE SWITCH
1 OR CIRCUIT
•Turn engine switch to ON (Engine OFF).
•Access BOO PID using WDS or equivalent.
•Verify that BOO PID changes from ON to OFF
when brake switch connector disconnected.
•Does BOO PID change from ON to OFF?Yes Go to next step.
No Go to Step 13.
12INSPECT BRAKE SWITCH 1
•Inspect brake switch 1.
•Is there any malfunction?Yes Replace brake switch, go to Step 21.
No Go to Step 21.
13INSPECT BRAKE SWITCH 1 SIGNAL CIRCUIT
FOR SHORT TO POWER
•Turn engine switch to ON (Engine OFF).
•Inspect voltage between brake switch terminal
D and body GND.
•Is voltage below 1.0 V?Yes Go to next step.
No Repair or replace harness for short to power, go to Step 21. STEP INSPECTION ACTION