Mazda CX 7. Manual — part 147
CONTROL SYSTEM [L3 WITH TC]
01-40–29
01-40
MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR/BOOST AIR TEMPERATURE SENSOR REMOVAL/
INSTALLATION[L3 WITH TC]
id014039801000
1. Disconnect the negative battery cable.
2. Remove the charge air cooler duct. (See01-13-5 INTAKE AIR SYSTEM REMOVAL/INSTALLATION[L3 WITH
TC].)
3. Remove the oil level gauge pipe. (See01-11-6 OIL PAN REMOVAL/INSTALLATION[L3 WITH TC].)
4. Disconnect the MAP/boost air temperature sensor connector.
5. Remove MAP/boost air temperature sensor from
the intake manifold.
6. Install in the reverse order of removal.
Tightening torque
5.0— 7.0 N·m {51— 71 kgf·cm, 45— 61 in·lbf}
End Of Sie
MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR INSPECTION[L3 WITH TC]
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Note
• Perform the following inspection only when directed.
• The following vacuum values are indicated by relative pressure from the MAP sensor.
1. Connect the M-MDS to the DLC-2.
2. Turn the ignition switch to ON (Engine off).
3. Select MAP PID on the M-MDS.
4. Verify that the MAP PID (pressure) and
barometric pressure are practically equal.
• If not as verified, perform the “Circuit Open/
Short Inspection”.
— If there is no open or short circuit, replace
the MAP sensor.
• If as verified, go to next step.
5. Apply vacuum of –25.0 kPa {–187 mmHg, –7.38
inHg} to the MAP sensor, and verify that the MAP
variation from that of Step 4 is approx. 25.0 kPa
{187 mmHg, 7.38 inHg}.
• If not as verified, perform the “Circuit Open/Short inspection”.
— If there is no open or short circuit, replace the barometric pressure sensor. (See01-13-5 INTAKE AIR
SYSTEM REMOVAL/INSTALLATION[L3 WITH TC].)
MAP/BOOST AIR
TEMPERATURE
SENSOR
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DLC-2
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CONTROL SYSTEM [L3 WITH TC]
01-40–30
Circuit Open/Short Inspection
1. Disconnect the PCM connector. (See01-40-6 PCM REMOVAL/INSTALLATION[L3 WITH TC].)
2. Inspect the following wiring harnesses for an open or short circuit. (Continuity check)
Open circuit
• If there is no continuity, there is an open circuit. Repair or replace the wiring harness.
— MAP/boost air temperature sensor terminal A and PCM terminal 2AV
— MAP/boost air temperature sensor terminal C and PCM terminal 2AU
— MAP/boost air temperature sensor terminal D and PCM terminal 2AG
Short circuit
• If there is continuity, there is a short circuit. Repair or replace the wiring harness.
— MAP/boost air temperature sensor terminal A and power supply.
— MAP/boost air temperature sensor terminal C and body ground.
— MAP/boost air temperature sensor terminal D and power supply.
— MAP/boost air temperature sensor terminal D and body ground
End Of Sie
WM: INTAKE AIR TEMPERATURE SENSOR
A
B
C
D
MAP/BOOST AIR
TEMPERATURE SENSOR
WIRING HARNESS SIDE CONNECTOR
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2BE 2BA 2AW 2AS 2AO 2AK 2AG 2AC 2Y 2U 2Q 2M
2E
2A
2I
2BH 2BD 2AZ 2AV 2AR 2AN 2AJ 2AF 2AB 2X 2T 2P
2H
2D
2L
2BG 2BC 2AY 2AU 2AQ 2AM 2AI 2AE 2AA 2W 2S 2O
2G
2C
2K
2BF 2BB 2AX 2AT 2AP 2AL 2AH 2AD 2Z
2V 2R 2N
2F
2B
2J
1BE 1BA 1AW 1AS 1AO 1AK 1AG 1AC 1Y 1U 1Q 1M
1E
1A
1I
1BH 1BD 1AZ 1AV 1AR 1AN 1AJ 1AF 1AB 1X
1T
1P
1H
1D
1L
1BG 1BC 1AY 1AU 1AQ 1AM 1AI 1AE 1AA 1W 1S 1O
1G
1C
1K
1BF 1BB 1AX 1AT 1AP 1AL 1AH 1AD 1Z
1V
1R 1N
1F
1B
1J
PCM
WIRING HARNESS-SIDE CONNECTOR
acxuuw00000081
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CONTROL SYSTEM [L3 WITH TC]
01-40–31
01-40
BOOST AIR TEMPERATURE SENSOR INSPECTION[L3 WITH TC]
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Resistance Inspection
Note
• Before performing the following inspection, make sure to follow the procedure as indicated in the
troubleshooting flowchart. (See 00-00-3 HOW TO USE THIS MANUAL.)
1. Disconnect MAP/boost air temperature sensor.
2. Measure the resistance between the MAP/boost
air temperature sensor terminals A and B using a
tester.
• If not as specified, replace the MAP/boost air
temperature sensor. (See01-13-5 INTAKE
AIR SYSTEM REMOVAL/INSTALLATION[L3
WITH TC].)
• If the MAP/boost air temperature sensor is
normal, but PID are out of specification,
perform the “Circuit Open/Short Inspection”.
Specification
Circuit Open/Short Inspection
1. Disconnect the PCM connector. (See01-40-6 PCM REMOVAL/INSTALLATION[L3 WITH TC].)
2. Inspect the following wiring harnesses for an open or short circuit. (Continuity check)
Open circuit
• If there is no continuity, there is an open circuit. Repair or replace the wiring harness.
— MAP/boost air temperature sensor terminal A and PCM terminal 2AV
— MAP/boost air temperature sensor terminal B and PCM terminal 2N
— MAP/boost air temperature sensor terminal C and PCM terminal 2AU
Short circuit
• If there is continuity, there is a short circuit. Repair or replace the wiring harness.
— MAP/boost air temperature sensor terminal A and power supply
— MAP/boost air temperature sensor terminal B and power supply
— MAP/boost air temperature sensor terminal B and body ground
— MAP/boost air temperature sensor terminal C and body ground
Ambient temperature (
°C {°F})
Resistance (kilohm)
20 {68}
2.4— 2.7
60 {140}
0.59— 0.64
A
B
C
D
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A
B
C
D
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2BE 2BA 2AW 2AS 2AO 2AK 2AG 2AC 2Y 2U 2Q 2M
2E
2A
2I
2BH 2BD 2AZ 2AV 2AR 2AN 2AJ 2AF 2AB 2X 2T 2P
2H
2D
2L
2BG 2BC 2AY 2AU 2AQ 2AM 2AI 2AE 2AA 2W 2S 2O
2G
2C
2K
2BF 2BB 2AX 2AT 2AP 2AL 2AH 2AD 2Z
2V 2R 2N
2F
2B
2J
1BE 1BA 1AW 1AS 1AO 1AK 1AG 1AC 1Y 1U 1Q 1M
1E
1A
1I
1BH 1BD 1AZ 1AV 1AR 1AN 1AJ 1AF 1AB 1X
1T
1P
1H
1D
1L
1BG 1BC 1AY 1AU 1AQ 1AM 1AI 1AE 1AA 1W 1S 1O
1G
1C
1K
1BF 1BB 1AX 1AT 1AP 1AL 1AH 1AD 1Z
1V
1R 1N
1F
1B
1J
PCM
WIRING HARNESS-SIDE CONNECTOR
acxuuw00000095
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CONTROL SYSTEM [L3 WITH TC]
01-40–32
End Of Sie
WM: THROTTLE POSITION SENSOR
THROTTLE POSITION (TP) SENSOR INSPECTION[L3 WITH TC]
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Note
• Before performing the following inspection, make sure to follow the procedure as indicated in the
troubleshooting flowchart. (See 00-00-3 HOW TO USE THIS MANUAL.)
Voltage Inspection
1. Verify that no DTC related to the APP sensor has been detected.
• If any DTCs related to the APP sensor have been detected, perform the DTC inspection.
(See01-02-13 DTC TABLE[L3 WITH TC].)
2. Start the engine and warm it up (ECT: more than 80
°C {176 °F}).
3. Turn the ignition switch to the ON position (Engine off).
4. Verify that the PCM terminal 2AK and 2AL change smoothly while the throttle valve is gradually opened.
• If as verified, go to next step.
• If not as verified, perform the “Circuit Open/Short Inspection”.
— If there is no open or short circuit, replace the throttle body.
5. Verify that the PCM terminal 2AK and 2AL voltages are as shown in the following table.
• If the voltage is not according to the following table, perform the “Circuit Open/Short Inspection”.
— If there is no open or short circuit, replace the throttle body.
TP sensor output voltage
2BE 2BA 2AW 2AS 2AO 2AK 2AG 2AC 2Y 2U 2Q 2M
2E
2A
2I
2BH 2BD 2AZ 2AV 2AR 2AN 2AJ 2AF 2AB 2X 2T 2P
2H
2D
2L
2BG 2BC 2AY 2AU 2AQ 2AM 2AI 2AE 2AA 2W 2S 2O
2G
2C
2K
2BF 2BB 2AX 2AT 2AP 2AL 2AH 2AD 2Z
2V 2R 2N
2F
2B
2J
1BE 1BA 1AW 1AS 1AO 1AK 1AG 1AC 1Y 1U 1Q 1M
1E
1A
1I
1BH 1BD 1AZ 1AV 1AR 1AN 1AJ 1AF 1AB 1X
1T
1P
1H
1D
1L
1BG 1BC 1AY 1AU 1AQ 1AM 1AI 1AE 1AA 1W 1S 1O
1G
1C
1K
1BF 1BB 1AX 1AT 1AP 1AL 1AH 1AD 1Z
1V
1R 1N
1F
1B
1J
PCM
WIRING HARNESS-SIDE CONNECTOR
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Condition
PCM terminal
2AK
(TP sensor No.1)
PCM terminal
2AL
(TP sensor No.2)
APP is released
0.4— 0.6 V
4.4— 4.6 V
APP is depressed
4.7— 4.9 V
0.1— 0.3 V
LOW
HIGH
OUTPUT
VOLTAGE
SMALL
TP SENSOR No.2
TP SENSOR No.1
LARGE
THROTTLE
OPENING ANGLE
TP SENSOR CHARACTERISTICS (REFERENCE)
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