Ect Sensor; Ect Sensor Resistance Inspection; Circuit Open/Short Inspection - Mazda CX-7 2007 Workshop Manual

7. Remove the ECT sensor.
8. Install in the reverse order of removal.
Tightening torque
10— 14 N·m {102— 142 kgf·cm, 89— 123
in·lbf}
9. Refill the engine coolant. (See01-12-2 COOLING
SYSTEM SERVICE WARNINGS[L3 WITH TC].)
End Of Sie
ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION[L3 WITH TC]
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.)

ECT Sensor Resistance Inspection

1. Drain the engine coolant. (See01-12-2 COOLING SYSTEM SERVICE WARNINGS[L3 WITH TC].)
2. Remove the ECT sensor (located above the starter).
3. Place the ECT sensor in water with a thermometer, and heat the water gradually.
4. Measure the resistance between the ECT sensor terminals A and B using a tester.
• If not as specified, replace the ECT sensor.
• If the ECT sensor is normal, but PID value is out of specification, perform the "Circuit Open/Short
Inspection".
Specification
Water temperature (°C {°F})
20 {68}
80 {176}

Circuit Open/Short Inspection

2BE 2BA 2AW 2AS 2AO 2AK 2AG 2AC 2Y 2U 2Q 2M
2BF 2BB 2AX 2AT 2AP 2AL 2AH 2AD 2Z 2V 2R 2N
2BG 2BC 2AY 2AU 2AQ 2AM 2AI 2AE 2AA 2W 2S 2O
2BH 2BD 2AZ 2AV 2AR 2AN 2AJ 2AF 2AB 2X 2T 2P
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)
CONTROL SYSTEM [L3 WITH TC]
Resistance (kilohm)
35.48— 39.20
3.65— 4.02
PCM
WIRING HARNESS-SIDE CONNECTOR
2E 2A
2I
2J 2F 2B
2K 2G 2C
2H 2D
2L

ECT SENSOR

ECT SENSOR
WIRING HARNESS SIDE CONNECTOR
B
1BE 1BA 1AW 1AS 1AO 1AK 1AG 1AC 1Y 1U 1Q 1M
1BF 1BB 1AX 1AT 1AP 1AL 1AH 1AD 1Z 1V 1R 1N
1BG 1BC 1AY 1AU 1AQ 1AM 1AI 1AE 1AA 1W 1S 1O
1BH 1BD 1AZ 1AV 1AR 1AN 1AJ 1AF 1AB 1X
acxuuw00000091
id014039802000
A
acxuuw00000092
1I 1E 1A
1J 1F 1B
1K 1G 1C
1T 1P 1L 1H 1D
acxuuw00000093
01-40–25
01-40