2002 MAZDA 6 sensor

F2–76
CONTROL SYSTEM
ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATIONA6E404018840201
Warning•When the engine is hot, it can badly burn. Turn off the engine and wait until it is cool before
removing the ECT sensor.
1. Disconnect the negative battery cable.
2. Drain the engine coolant. (See Section E ENGINE COOLANT REPLACEMENT.)
3. Remove the common rail. (See F2–53 SUPPLY PUMP REMOVAL/INSTALLATION .)
4. Remove in the order indicated in the table.
5. Install in the reverse order of removal.
End Of Sie
ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTIONA6E404018840202
Note
• Perform the following test only when directed.
Resistance Inspection 1. Place the ECT sensor in water with a thermometer, and heat the water gradually.
2. Measure the resistance between the ECT sensor terminals using an ohmmeter.
• If not as specified, replace the ECT sensor.
Specification
Circuit Open/Short Inspection 1. Inspect for open/short circuit in the following
wiring harnesses.• If there is open/short circuit, repair or replace
wiring harness.
Open circuit • Signal circuit
— ECT sensor terminal A and PCM terminal 87
• GND circuit
— ECT sensor terminal B and PCM terminal 91
Short circuit • Signal circuit
— ECT sensor terminal A and PCM terminal 87 to power circuit
— ECT sensor terminal A and PCM terminal 87 to GND
End Of Sie
1ECT sensor
2Gasket149 D015 001
N·m {kgf·m, ft·lbf}
16—23
{1.6—2.4, 12—17}2R
A6E40702045
Water temperature (
°C { °F}) Resistance (kilohm)
20 {68} 2.21—2.69
80 {176} 0.29—0.34A
B
A6E40702046

CONTROL SYSTEM
F2–77
F2
FUEL TEMPERATURE SENSOR INSPECTIONA6E404013350201
Note
•Perform the following test only when directed.
Resistance Inspection
1. Disconnect the negative battery cable.
2. Remove the supply pump. (See F2–53 SUPPLY PUMP REMOVAL/INSTALLATION.)
3. Measure the resistance between the fuel
temperature sensor terminals using an
ohmmeter.
•If not as specified, repair the supply pump.
(See F2–54 SUPPLY PUMP INSPECTION.)
Specification
Circuit Open/Short Inspection
1. Inspect for open/short circuit in the following
wiring harnesses.
•If there is open/short circuit, repair or replace wiring harness.
Open circuit
•Signal circuit
—Fuel temperature sensor terminal A and PCM terminal 35
•GND circuit
—Fuel temperature sensor terminal B and PCM terminal 91
Short circuit
•Signal circuit
—Fuel temperature sensor terminal A and PCM terminal 35 to power circuit
—Fuel temperature sensor terminal A and PCM terminal 35 to GND
End Of Sie
Ambient temperature (°C
{°F})Resistance (kilohm)
20 {68} 2.0—3.0
A
B
A6E40702047

F2–78
CONTROL SYSTEM
BOOST SENSOR INSPECTIONA6E404013214201
Note
•Perform the following test only when directed.
Visual Inspection
1. Inspect the boost sensor for damage and cracks.
•If not as specified, replace the boost sensor.
2. Inspect vacuum hose for improper routing, kinks or leakage.
•If there is any malfunction, repair or replace suspected hose.
Voltage Inspection
1. Turn the engine switch to ON.
2. Monitor the MAP PID using the WDS or equivalent.
•If not as specified, perform the “Circuit Open/Short Inspection”.
MAP PID
2.1—2.5 V
3. Start the engine and warm up the engine completely.
4. Monitor the MAP PID using the WDS or equivalent at idle.
•If not as specified, perform the “Circuit Open/Short Inspection”.
MAP PID
2.1—2.5 V
Circuit Open/Short Inspection
1. Inspect for open/short circuit in the following
wiring harnesses.
•If there is open/short circuit, repair or replace
wiring harnesses.
Open circuit
•Power circuit
—Boost sensor terminal C and PCM terminal 90
•Signal circuit
—Boost sensor terminal B and PCM terminal 36
•GND circuit
—Boost sensor terminal A and PCM terminal 91
Short circuit
•Power circuit
—Boost sensor terminal C and PCM terminal 90 to GND
•Signal circuit
—Boost sensor terminal B and PCM terminal 36 to power circuit
—Boost sensor terminal B and PCM terminal 36 to GND
End Of Sie
BOOST SENSOR
HARNESS SIDE CONNECTOR
A
B C
A6E40702048

CONTROL SYSTEM
F2–79
F2
FUEL PRESSURE SENSOR INSPECTIONA6E404013015201
Note
•Perform the following test only when directed.
Voltage Inspection
1. Start the engine and warm up the engine completely.
2. Measure the voltage between fuel pressure sensor terminals A and B using a voltmeter at idle.
•If not as specified, perform the “Circuit Open/Short Inspection”.
—If there is no open/short circuit, replace the common rail.
Specification
1.4—1.7 V
3. Turn off the engine and wait three minutes.
4. Turn the engine switch to ON.
5. Measure the voltage between fuel pressure
sensor terminals A and B using a voltmeter.
•If not as specified, perform the “Circuit Open/
Short Inspection”.
—If there is no open/short circuit, replace
the common rail.
Specification
0.9—1.1 V
CIrcuit Open/Short Inspection
1. Inspect for open/short circuit in the following
wiring harnesses.
•If there is open/short circuit, repair or replace wiring harnesses.
Open circuit
•Power circuit
—Fuel pressure sensor terminal C and PCM terminal 90
•Signal circuit
—Fuel pressure sensor terminal B and PCM terminal 61
•GND circuit
—Fuel pressure sensor terminal A and PCM terminal 91
Short circuit
•Power circuit
—Fuel pressure sensor terminal C and PCM terminal 90 to GND
•Signal circuit
—Fuel pressure sensor terminal B and PCM terminal 61 to power circuit
—Fuel pressure sensor terminal B and PCM terminal 61 to GND
End Of Sie
FUEL PRESSURE SENSOR
HARNESS SIDE CONNECTOR
A
B C
A6E40702049

F2–80
CONTROL SYSTEM
CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATIONA6E404018200201
Caution
•When foreign material, such as iron chips, gets on the CMP sensor, it can cause abnormal output
from the sensor because of flux turbulence and adversely affect engine control. Be sure there is
no foreign material on the CMP sensor when replacing.
•Do not forcefully pull the wiring harness of the CMP sensor. Doing so will break the harness.
1. Disconnect the negative battery cable.
2. Remove the engine cover.
3. Remove in the order indicated in the table.
4. Install in the reverse order of removal.
O-ring Installation Note
1. Apply engine oil to new O-ring thinly and install it
as does not damage.
End Of Sie
CAMSHAFT POSITION (CMP) SENSOR INSPECTIONA6E404018200202
Note
•Perform the following test only when directed.
Caution
•When foreign material, such as iron chips, gets on the CMP sensor, it can cause abnormal output
from the sensor because of flux turbulence and adversely affect engine control. Be sure there is
no foreign material on the CMP sensor when replacing.
•Do not forcefully pull the wiring harness of the CMP sensor. Doing so will break the harness.
Visual Inspection
1. Verify that the CMP sensor and the pulsar are free of any metallic shavings or particles.
•If any are found on the CMP sensor and the pulsar, clean them off.
Air Gap Inspection
1. Disconnect the negative battery cable.
2. Remove the gear cover.
3. Verify that clearance A between the CMP sensor
and the pulsar is within the specification.
•If not as specified, replace the CMP sensor.
Clearance A
0.5—1.5 mm {0.020—0.059 in}
1 CMP sensor installation bolt
2 CMP sensor
3 O-ring
(See F2–80 O-ring Installation Note)
N·m {kgf·cm, in·lbf}
3
127.8—10.8
{80—110, 69.1—95.5}
R
OILOIL
A6E40702050
CMP SENSOR
CLEARANCE A
PULSAR
A6E40702051

CONTROL SYSTEM
F2–81
F2
Resistance Inspection
1. Disconnect the negative battery cable.
2. Remove the engine cover.
3. Disconnect the CMP sensor connector.
4. Inspect the resistance between the terminals
under the following condition.
•If not as specified, replace the CMP sensor.
Specification
Circuit Open/Short Inspection
1. Inspect for open/short circuit in the following
wiring harnesses.
•if there is open/short circuit, repair or replace
wiring harnesses.
Open circuit
•CMP sensor terminal A and PCM terminal 81
•CMP sensor terminal B and PCM terminal 55
Short circuit
•CMP sensor terminal A and PCM terminal 81 to GND
•CMP sensor terminal B and PCM terminal 55 to GND
End Of Sie
CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATIONA6E404018230201
Caution
•When foreign material, such as iron chips, gets on the CKP sensor, it can cause abnormal output
from the sensor because of flux turbulence and adversely affect engine control. Be sure there is
no foreign material on the CKP sensor when replacing.
•Do not forcefully pull the wiring harness of the CKP sensor. Doing so will break the harness.
1. Disconnect the negative battery cable.
2. Remove the crankshaft pulley. (See B2–9 TIMING BELT REMOVAL/INSTALLATION.)
3. Remove the lower timing belt cover. (See B2–9 TIMING BELT REMOVAL/INSTALLATION.)
4. Remove in the order indicated in the table.
5. Install in the reverse order of removal.
End Of Sie
TerminalAtmospheric
temperature (°C {°F})Resistance
(kilohm)
A—B 20 {68} 1.85—2.45
A
B
A6E40702052
1 CKP sensor installation bolt
2 CKP sensor
N·m {kgf·cm, in·lbf} 16—23 {1.6—2.4, 12—17}12
A6E40702053

F2–82
CONTROL SYSTEM
CRANKSHAFT POSITION (CKP) SENSOR INSPECTIONA6E404018230202
Note
•Perform the following test only when directed.
Caution
•When foreign material, such as iron chips, gets on the CKP sensor, it can cause abnormal output
from the sensor because of flux turbulence and adversely affect engine control. Be sure there is
no foreign material on the CKP sensor when replacing.
•Do not forcefully pull the wiring harness of the CKP sensor. Doing so will break the harness.
Visual Inspection
1. Verify that the CKP sensor and the pulsar are free of any metallic shavings or particles.
•If any are found on the CKP sensor and the pulsar, clean them off.
Air Gap Inspection
1. Disconnect the negative battery cable.
2. Remove the crankshaft pulley. (See B2–9 TIMING BELT REMOVAL/INSTALLATION.)
3. Remove the crankshaft pulley. (See B2–9 TIMING BELT REMOVAL/INSTALLATION.)
4. Verify that clearance A between the CKP sensor
and the pulsar is within the specification.
•If not as specified, replace the CKP sensor.
Clearance A
1.5—2.5 mm {0.059—0.098 in}
Resistance Inspection
1. Disconnect the negative battery cable.
2. Disconnect the CKP sensor connector.
3. Measure the resistance between the CKP sensor
terminals under the following condition.
•If not as specified, replace the CKP sensor.
Specification
Circuit Open/Short Inspection
1. Inspect for open/short circuit in the following wiring harnesses.
•If there is open/short circuit, repair or replace wiring harnesses.
Open circuit
•CKP sensor terminal A and PCM terminal 29
•CKP sensor terminal B and PCM terminal 3
Short circuit
•CKP sensor terminal A and PCM terminal 29 to GND
•CKP sensor terminal B and PCM terminal 3 to GND
End Of Sie
TerminalAtmospheric
temperature °C {°F}Resistance (kilohm)
A—B 20 {68} 1.8—2.45
CLEARANCE A
A6E40702054
A
BC
A6E40702055

ON-BOARD DIAGNOSTIC
F2–87
F2
End Of SieDTC TABLEA6E407018881210
×: Applicable –: Not applicable
DTC Condition MILMemory
functionPage
P0016 Crankshaft position-camshaft position correlation malfunction××(See F2–88 DTC P0016)
P0088 Fuel pressure system too high–×(See F2–89 DTC P0088)
P0091 Suction control valve circuit low input××(See F2–90 DTC P0091)
P0092 Suction control valve circuit high input××(See F2–92 DTC P0092)
P0093 Fuel system leak detection××(See F2–94 DTC P0093)
P0097 IAT sensor No.1 circuit low input××(See F2–95 DTC P0097)
P0098 IAT sensor No.1 circuit high input××(See F2–97 DTC P0098)
P0102 MAF sensor circuit low input××(See F2–99 DTC P0102)
P0103 MAF sensor circuit high input××(See F2–101 DTC P0103)
P0107 Boost sensor circuit low input××(See F2–103 DTC P0107)
P0108 Boost sensor circuit high input××(See F2–105 DTC P0108)
P0112 IAT sensor No.2 circuit low input××(See F2–107 DTC P0112)
P0113 IAT sensor No.2 circuit high input××(See F2–109 DTC P0113)
P0117 ECT sensor circuit low input××(See F2–111 DTC P0117)
P0118 ECT sensor circuit high input××(See F2–113 DTC P0118)
P0121 Accelerator position sensor No.1 circuit performance problem××(See F2–115 DTC P0121)
P0122 Accelerator position sensor No.1 circuit low input××(See F2–116 DTC P0122)
P0123 Accelerator position sensor No.1 circuit high input××(See F2–118 DTC P0123)
P0182 Fuel temperature sensor circuit low input××(See F2–120 DTC P0182)
P0183 Fuel temperature sensor circuit high input××(See F2–122 DTC P0183)
P0191 Fuel pressure sensor circuit performance problem××(See F2–124 DTC P0191)
P0192 Fuel pressure sensor circuit low input××(See F2–125 DTC P0192)
P0193 Fuel pressure sensor circuit high input××(See F2–127 DTC P0193)
P0200 Fuel injector circuit malfunction××(See F2–129 DTC P0200)
P0221 Accelerator position sensor No.2 circuit performance problem××(See F2–131 DTC P0221)
P0222 Accelerator position sensor No.2 circuit low input××(See F2–132 DTC P0222)
P0223 Accelerator position sensor No.2 circuit high input××(See F2–134 DTC P0223)
P0300 Random misfire detection××(See F2–136 DTC P0300)
P0336 CKP sensor circuit performance problem××(See F2–137 DTC P0336)
P0337 CKP sensor circuit low input××(See F2–138 DTC P0337)
P0341 CMP sensor circuit performance problem××(See F2–140 DTC P0341)
P0342 CMP sensor circuit low input××(See F2–141 DTC P0342)
P0380 Glow plug relay circuit malfunction××(See F2–143 DTC P0380)
P0504 Brake switch signal correlation malfunction××(See F2–145 DTC P0504)
P0510 Idle switch circuit malfunction××(See F2–148 DTC P0510)
P0512 Engine switch circuit malfunction××(See F2–150 DTC P0512)
P0564 Cruise control signal malfunction–×(See F2–152 DTC P0564)
P0602 PCM programming error××(See F2–154 DTC P0602)
P0606 PCM malfunction××(See F2–155 DTC P0606)
P0610 Control module vehicle options error××(See F2–155 DTC P0610)
P0661 VSC solenoid valve circuit low input–×(See F2–156 DTC P0661)
P0662 VSC solenoid valve circuit high input–×(See F2–158 DTC P0662)
P0850 Neutral switch circuit malfunction××(See F2–160 DTC P0850)
P1190 Calibration resistor circuit malfunction××(See F2–162 DTC P1190)
P2228 BARO sensor circuit low input××(See F2–164 DTC P2228)
P2229 BARO sensor circuit high input××(See F2–164 DTC P2229)
U0073 CAN bus off–×(See T–39 MULTIPLEX
COMMUNICATION SYSTEM)
U0121PCM cannot receive any signals from ABS, ABS/TCS or DSC
HU/CM××(See T–39 MULTIPLEX
COMMUNICATION SYSTEM)
U0155 PCM cannot receive any signals from instrument cluster××(See T–39 MULTIPLEX
COMMUNICATION SYSTEM)