Climate Control: Diagnosis Honda Pilot I рестайлинг

Symptom Troubleshooting Index

SYMPTOM TROUBLESHOOTING INDEX

Diagnostic Trouble Codes Troubleshooting

DIAGNOSTIC TROUBLE CODES (DTC) LIST

Scheme 14

Scheme 15

Scheme 16

1. Remove the in-car temperature sensor (see «IN-CAR TEMPERATURE SENSOR TEST»(ref-243355-S40142045792006082300000) ).
2. Measure the resistance between the No. 1 and No. 2 terminals of the in-car temperature sensor. Check for a change in resistance by heating or cooling the sensor with a hair dryer. Is the resistance within the specifications shown on (Scheme 14)? YES - Go to step 3. NO - Replace the in-car temperature sensor.
3. Disconnect climate control unit connector B (30P).
4. Check for continuity between the No. 18 terminal of climate control unit connector B (30P) and the No. 1 terminal of the in-car temperature sensor 2P connector. Is there continuity? YES - Go to step 5. NO - Repair open in the wire between the climate control unit and the in-car temperature sensor.
5. Check for continuity between the No. 3 terminal of climate control unit connector B (30P) and the No. 2 terminal of the in-car temperature sensor 2P connector. Is there continuity? YES - Check for loose wires or poor connections at climate control unit connector B (30P) and at the in-car temperature sensor 2P connector. If the connections are good, substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit. NO - Repair open in the wire between the climate control unit and the in-car temperature sensor.

Scheme 17

1. Remove the in-car temperature sensor (see «IN-CAR TEMPERATURE SENSOR TEST»(ref-243355-S40142045792006082300000) ).
2. Test the in-car temperature sensor (see «IN-CAR TEMPERATURE SENSOR TEST»(ref-243355-S40142045792006082300000) ). Is the resistance within the specifications shown on the graph? YES -Go to step 3. NO -Replace the in-car temperature sensor.
3. Disconnect climate control unit connector B (30P).
4. Check for continuity between the No. 18 terminal of climate control unit connector B (30P) and body ground. Is there continuity? YES - Repair short to body ground in the wire between the climate control unit and the in-car temperature sensor. NO - Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit.

Scheme 18

Scheme 19

Scheme 20

1. Remove the outside air temperature sensor (see «OUTSIDE AIR TEMPERATURE SENSOR TEST»(ref-243355-S03254244162006082300000) ).
2. Measure the resistance between the No. 1 and No. 2 terminals of the outside air temperature sensor. Dip the sensor in ice water, and measure the resistance. Then pour warm water on the sensor, and check for a change in resistance. Is the resistance within the specifications shown on the graph? YES - Go to step 3 . NO - Replace the outside air temperature sensor.
3. Disconnect climate control unit connector B (30P).
4. Check for continuity between the No. 19 terminal of climate control unit connector B (30P) and the No. 2 terminal of the outside air temperature sensor 2P connector. Is there continuity? YES - Go to step 5 . NO - Repair open in the wire between the climate control unit and the outside air temperature sensor.
5. Check for continuity between the No. 3 terminal of climate control unit connector B (30P) and the No. 1 terminal of the outside air temperature sensor 2P connector. Is there continuity? YES - Check for loose wires or poor connections at climate control unit connector B (30P) and at the outside air temperature sensor 2P connector. If the connections are good, substitute a known-good climate control unit, and recheck. If the symptom/ indication goes away, replace the original climate control unit. NO - Repair open in the wire between the climate control unit and the outside air temperature sensor.

Scheme 21

1. Remove the outside air temperature sensor (see «OUTSIDE AIR TEMPERATURE SENSOR TEST»(ref-243355-S03254244162006082300000) ).
2. Test the outside air temperature sensor (see «OUTSIDE AIR TEMPERATURE SENSOR TEST»(ref-243355-S03254244162006082300000) ). Is the resistance within the specifications shown on the graph? YES - Go to step 3 . NO - Replace the outside air temperature sensor.
3. Disconnect climate control unit connector B (30P), and gauge assembly connector A (30P).
4. Check for continuity between the No. 19 terminal of climate control unit connector B (30P) and body ground. Is there continuity? YES -Repair short to body ground in the wire between the climate control unit, the gauge assembly, and the outside air temperature sensor. NO - Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit.

Scheme 22

Scheme 23

1. Disconnect the sunlight sensor 2P connector.
2. Disconnect climate control unit connector B (30P).
3. Check for continuity between the No. 20 terminal of climate control unit connector B (30P) and the No. 1 terminal of the sunlight sensor 2P connector. Is there continuity? YES - Go to step 4 . NO - Repair open in the wire between the climate control unit and the sunlight sensor.
4. Check for continuity between the No. 3 terminal of climate control unit connector B (30P) and the No. 2 terminal of the sunlight sensor 2P connector. Is there continuity? YES - Go to step 5 . NO - Repair open in the wire between the climate control unit and the sunlight sensor.
5. Reconnect the sunlight sensor 2P connector.
6. Reconnect climate control unit connector B (30P).
7. Test the sunlight sensor (see «SUNLIGHT SENSOR TEST»(ref-243355-S09305516872006082300000) ). Is the sunlight sensor OK? YES - Check for loose wires or poor connections at climate control unit connector B (30P) and at the sunlight sensor 2P connector. If the connections are good, substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit. NO - Replace the sunlight sensor.

Scheme 24

1. Disconnect the sunlight sensor 2P connector.
2. Disconnect climate control unit connector B (30P).
3. Check for continuity between the No. 20 terminal of climate control unit connector B (30P) and body ground. Is there continuity? YES - Repair short to body ground in the wire between the climate control unit and the sunlight sensor. NO - Go to step 4 .
4. Reconnect the sunlight sensor 2P connector.
5. Reconnect climate control unit connector B (30P).
6. Test the sunlight sensor (see «SUNLIGHT SENSOR TEST»(ref-243355-S09305516872006082300000) ). Is the sunlight sensor OK? YES - Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit. NO - Replace the sunlight sensor.

Scheme 25

Scheme 26

Scheme 27

1. Disconnect the evaporator temperature sensor 2P connector.
2. Measure the resistance between the No. 1 and No. 2 terminals of the evaporator temperature sensor. Is the resistance within the specifications shown on the graph? YES - Go to step 3 . NO - Replace the evaporator temperature sensor.
3. Disconnect climate control unit connector B (30P).
4. Check for continuity between the No. 21 terminal of climate control unit connector B (30P) and the No. 2 terminal of the evaporator temperature sensor 2P connector. Is there continuity? YES - Go to step 5 . NO - Repair open in the wire between the climate control unit and the evaporator temperature sensor.
5. Check for continuity between the No. 3 terminal of climate control unit connector B (30P) and the No. 1 terminal of the evaporator temperature sensor 2P connector. Is there continuity? YES - Check for loose wires or poor connections at climate control unit connector B (30P) and at the evaporator temperature sensor 2P connector. If the connections are good, substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit. NO - Repair open in the wire between the climate control unit and the evaporator temperature sensor.

Scheme 28

1. Disconnect the evaporator temperature sensor 2P connector.
2. Test the evaporator temperature sensor (see «EVAPORATOR TEMPERATURE SENSOR TEST»(ref-243302-S14043200792006082300000) ). Is the resistance within the specifications shown on the graph? YES - Go to step 3 . NO - Replace the evaporator temperature sensor.
3. Disconnect climate control unit connector B (30P).
4. Check for continuity between the No. 21 terminal of climate control unit connector B (30P) and body ground. Is there continuity? YES - Repair short to body ground in the wire between the climate control unit and the evaporator temperature sensor. NO - Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit.

Scheme 29

1. Test the air mix control motor (see «AIR MIX CONTROL MOTOR TEST»(ref-243302-S30081100042006082300000) ). Is the air mix control motor OK? YES - Go to step 2 . NO - Replace the air mix control motor.
2. Disconnect the air mix control motor 7P connector.
3. Disconnect climate control unit connector B (30P), and gauge assembly connector A (30P).
4. Check for continuity between the following terminals of climate control unit connector B (30P) and the air mix control motor 7P connector. 30P: 7P: No. 3 No. 5 No. 10 No. 1 No. 11 No. 2 No. 17 No. 3 No. 23 No. 7 Is there continuity? YES - Check for loose wires or poor connections at climate control unit connector B (30P) and at the air mix control motor 7P connector. If the connections are good, substitute a known-good air mix control motor, and recheck. If the symptom/indication goes away, replace the original air mix control motor. If the symptom/indication continues, substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit. NO - Repair any open in the wire(s) between the climate control unit, the gauge control module, and the air mix control motor.

Scheme 30

Scheme 31

1. Test the air mix control motor (see «AIR MIX CONTROL MOTOR TEST»(ref-243302-S30081100042006082300000) ). Is the air mix control motor OK? YES - Go to step 2 . NO - Replace the air mix control motor.
2. Disconnect the air mix control motor 7P connector.
3. Disconnect climate control unit connector B (30P), and gauge assembly connector A (30P).
4. Check for continuity between body ground and climate control unit connector B (30P) terminals No. 3, 10, 11, 17 and 23 individually. Is there continuity? YES - Repair any short to body ground in the wire(s) between the climate control unit, the gauge control module, and the air mix control motor. NO - Go to step 5 .
5. Turn the ignition switch ON (II), and check the same terminals for voltage. Is there any voltage? YES - Repair any short to power in the wire(s) between the climate control unit, the gauge assembly, and the air mix control motor. This short may also damage the climate control unit. Repair the short to power before replacing the climate control unit. NO - Substitute a known-good air mix control motor, and recheck. If the symptom/indication goes away, replace the original air mix control motor. If the symptom/indication continues, substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit.

Scheme 32

Scheme 33

1. Test the air mix control motor (see «AIR MIX CONTROL MOTOR TEST»(ref-243302-S30081100042006082300000) ). Is the air mix control motor OK? YES - Go to step 2. NO - Replace the air mix control motor, or repair the linkage and doors.
2. Disconnect the front air mix control motor 7P connector.
3. Disconnect climate control unit connector B (30P).
4. Check for continuity between the following terminals of climate control unit connector B (30P) and the front air mix control motor 7P connector. 30P: 7P: No. 10 No. 1 No. 11 No. 2 Is there continuity? YES - Go to step 5. NO - Repair open in the wire(s) between the climate control unit and the front air mix control motor.
5. Check for continuity between body ground and climate control unit connector B (30P) terminals No. 10 and No. 11 individually. Is there continuity? YES - Repair short to body ground in the wire(s) between the climate control unit and the front air mix control motor. NO - Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the orginal climate control unit.

Scheme 34

Scheme 35

Scheme 36

1. Test the mode control motor (see «MODE CONTROL MOTOR TEST»(ref-243302-S21830590382006082300000) ). Is the mode control motor OK? YES - Go to step 2 . NO - Replace the mode control motor.
2. Disconnect the mode control motor 7P connector.
3. Disconnect climate control unit connector B (30P), and gauge assembly connector A (30P).
4. Check for continuity between body ground and climate control unit connector B (30P) terminals No. 3, 4, 5, 6, 7, 8 and 9 individually. Is there continuity? YES - Repair any short to body ground in the wire(s) between the climate control unit, the gauge assembly, and the mode control motor. NO - Go to step 5 .
5. Turn the ignition switch ON (II), and check the same terminals for voltage. Is there any voltage? YES - Repair any short to power in the wire(s) between the climate control unit, the gauge assembly, and the mode control motor. This short may also damage the climate control unit. Repair the short to power before replacing the climate control unit. NO - Go to step 6 .
6. Turn the ignition switch OFF, and check for continuity between the following terminals of climate control unit connector B (30P) and the mode control motor 7P connector. 30P: 7P: No. 3 No. 7 No. 4 No. 3 No. 5 No. 4 No. 6 No. 5 No. 7 No. 6 Is there continuity? YES -Check for loose wires or poor connections at climate control unit connector B (30P) and at the mode control motor 7P connector. If the connections are good, substitute a known-good mode control motor, and recheck. If the symptom/indication goes away, replace the original mode control motor. If the symptom/indication continues, substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit. NO - Repair any open in the wire(s) between the climate control unit and the mode control motor.

Scheme 37

Scheme 38

1. Test the mode control motor (see «MODE CONTROL MOTOR TEST»(ref-243302-S21830590382006082300000) ). Is the mode control motor OK? YES - Go to step 2. NO - Replace the mode control motor, or repair the linkage and doors.
2. Disconnect the front mode control motor 7P connector.
3. Disconnect climate control unit connector B (30P).
4. Check for continuity between the following terminals of climate control unit connector B (30P) and the front mode control motor 7P connector. 30P: 7P: No. 8 No. 1 No. 9 No. 2 Is there continuity? Go to step 5. Repair open in the wire(s) between yhe climate control unit and the front mode control motor.
5. Check for continuity between body ground and climate control unit connector B (30P) terminals No. 8 and No. 9 individually. Is there continuity? YES - Repair short to body ground in the wire(s) between the climate control unit and the front mode control motor. NO - Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the orginal climate control unit.

Scheme 39

Scheme 40

Scheme 41

Scheme 42

Scheme 43

Scheme 44

Scheme 45

Scheme 46

Scheme 47

1. Check the No. 56 (40 A) fuse in the underhood fuse/relay box, and the No. 3 (7.5 A) fuse in the driver's underdash fuse/relay box. Are the fuses OK? YES - Go to step 2 . NO - Replace the fuse(s), and recheck.
2. Connect the No. 2 terminal of the blower motor 2P connector to body ground with a jumper wire.
3. Turn the ignition switch ON (II). Does the blower motor run? YES - Go to step 4 . NO - Go to step 17 .
4. Turn the ignition switch OFF.
5. Disconnect the jumper wire.
6. Disconnect the front power transistor 5P connector.
7. Check for continuity between the No. 5 terminal of the power transistor 5P connector and body ground. Is there continuity? YES - Go to step 8 . NO - Check for an open in the wire between the power transistor and body ground. If the wire is OK, check for poor ground at G401.
8. Connect the No. 4 and No. 5 terminals of the power transistor 5P connector with a jumper wire.
9. Turn the ignition switch ON (II). Does the blower motor run at high speed? YES - Go to step 10 . NO - Repair open in the wire between the power transistor and the blower motor.
10. Turn the ignition switch OFF.
11. Disconnect the jumper wire.
12. Disconnect climate control unit connector B (30P).
13. Check for continuity between the No. 15 and No. 16 terminals of climate control unit connector B (30P) and body ground individually. Is there continuity? YES - Repair any short to body ground in the wire(s) between the climate control unit and the power transistor. NO - Go to step 14 .
14. Check for continuity between the following terminals of climate control unit connector B (30P) and power transistor 5P connector. 30P: 5P: No. 15 No. 1 No. 16 No. 3 Is there continuity? YES - Go to step 15 . NO - Repair any open in the wire(s) between the climate control unit and the power transistor.
15. Reconnect climate control unit connector B (30P).
16. Test the power transistor (see «EVAPORATOR TEMPERATURE SENSOR TEST»(ref-243302-S14043200792006082300000) ). Is the power transistor OK? YES - Check for loose wires or poor connections at climate control unit connector B (30P) and at the power transistor 5P connector. If the connections are good, substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit. NO - Replace the power transistor.
17. Measure the voltage between the No. 1 terminal of the blower motor 2P connector and body ground. Is there battery voltage? YES - Replace the blower motor. NO - Go to step 18 .
18. Turn the ignition switch OFF.
19. Remove the blower motor relay from the underhood fuse/relay box, and test it (see «NORMALLY-OPEN TYPE B»(ref-243309-S28647392512006082300000) ). Is the relay OK? YES - Go to step 20 . NO - Replace the blower motor relay.
20. Measure the voltage between the No. 4 terminal of the blower motor relay 4P socket and body ground. Is there battery voltage? YES - Go to step 21 . NO - Replace the underhood fuse/relay box.
21. Turn the ignition switch ON (II).
22. Measure the voltage between the No.1 terminal of the blower motor relay 4P socket and body ground. Is there battery voltage? YES - Go to step 23 . NO - Repair open in the wire between the No. 3 fuse in the driver s underdash fuse/relay box and the blower motor relay.
23. Turn the ignition switch OFF.
24. Check for continuity between the No. 2 terminal of the blower motor relay 4P socket and body ground. Is there continuity? YES - Repair open in the YEL/BLK wire between the blower motor relay and the blower motor. NO - Check for an open in the wire between the blower motor relay and body ground. If the wire is OK, check for poor ground at G201.

Scheme 48

Scheme 49

Scheme 50

Scheme 51

Scheme 52

Scheme 53

Scheme 54

Scheme 55

Scheme 56

Scheme 57

Scheme 58

Scheme 59

Scheme 60

1. Check the No. 55 (30 A) fuse in the underhood fuse/relay box, and the No. 3 (7.5 A) fuse in the driver's underdash fuse/relay box. Are the fuses OK? YES - Go to step 2 . NO - Replace the fuse(s), and recheck.
2. Connect the No. 2 terminal of the rear blower motor 2P connector to body ground with a jumper wire.
3. Turn the ignition switch ON (II). Does the rear blower motor run? YES - Go to step 4 . NO - Go to step 25 .
4. Turn the ignition switch OFF.
5. Disconnect the jumper wire.
6. Disconnect the rear power transistor 4P connector.
7. Check for continuity between the No. 3 terminal of the rear power transistor 4P connector and body ground. Is there continuity? YES - Go to step 8 . NO - Check for an open in the wire between the rear power transistor and body ground. If the wire is OK, check for poor ground at G501.
8. Connect the No. 2 and No. 3 terminals of the rear power transistor 4P connector with a jumper wire.
9. Turn the ignition switch ON (II). Does the rear blower motor run at high speed? YES - Go to step 10 . NO - Repair open in the wire between the rear power transistor and the rear blower motor.
10. Turn the ignition switch OFF.
11. Disconnect the jumper wire.
12. Disconnect climate control unit connector A (20P).
13. Check for continuity between the No. 3 and No. 4 terminals of climate control unit connector A (20P) and body ground individually. Is there continuity? YES - Repair any short to body ground in the wire(s) between the climate control unit and the rear power transistor. NO - Go to step 14 .
14. Check for continuity between the following terminals of climate control unit connector A (20P) and rear power transistor 4P connector. 20P: 4P: No. 3 No. 4 No. 4 No. 1 Is there continuity? YES - Go to step 15 . NO - Repair any open in the wire(s) between the climate control unit and the rear power transistor.
15. Reconnect climate control unit connector A (20P).
16. Test the rear power transistor (see «REAR POWER TRANSISTOR TEST»(ref-243360-S03554864032006082300000) ). Is the rear power transistor OK? YES - Go to step 17 . NO - Replace the rear power transistor.
17. Disconnect the rear heater-A/C control switch 10P connector.
18. Test the rear heater-A/C control switch (see «REAR HEATER-A/C CONTROL SWITCH REMOVAL AND INSTALLATION»(ref-243360-S20633356022006082300000) ). Is the rear heater-A/C control switch OK? YES - Go to step 19 . NO - Replace the rear heater-A/C control switch.
19. Check for continuity between body ground and climate control unit connector A (20P) terminals No. 6, 7, 8, 9, 10 and 20 individually. Is there continuity? YES - Repair any short to body ground in the wire(s) between the climate control unit and the rear heater-A/C control switch. NO - Go to step 20 .
20. Turn the ignition switch ON (II), and check the same terminals for voltage. Is there any voltage? YES - Repair any short to power in the wire(s) between the climate control unit and the rear heater-A/C control switch. This short may also damage the rear heater-A/C control switch. Repair the short to power before replacing the rear heater-A/C control switch. NO - Go to step 21 .
21. Turn the ignition switch OFF.
22. Check for continuity between the No. 7 terminal of the rear heater-A/C control switch 10P connector and body ground. Is there continuity? YES - Go to step 23 . NO - Check for an open in the wire between the rear heater-A/C control switch and body ground. If the wire is OK, check for poor ground at G501.
23. Turn the ignition switch OFF.
24. Check for continuity between the following terminals of climate control unit connector A (20P) and the rear heater-A/C control switch 10P connector. 20P: 10P: No. 6 No. 6 No. 7 No. 5 No. 8 No. 4 No. 9 No. 3 No. 10 No. 2 No. 20 No. 1 Is there continuity? YES - Check for loose wires or poor connections at climate control unit connector A (20P) and at the rear heater-A/C control switch 10P connector. If the connections are good, substitute a known-good climate control unit, and recheck. If the symptom/ indication goes away, replace the original climate control unit. NO - Repair any open in the wire(s) between the climate control unit and the rear heater-A/C control switch.
25. Measure the voltage between the No. 1 terminal of the rear blower motor 2P connector and body ground. Is there battery voltage? YES - Replace the rear blower motor (see «REAR BLOWER MOTOR REPLACEMENT»(ref-243360-S18999729552006082300000) ). NO - Go to step 26 .
26. Turn the ignition switch OFF.
27. Remove the rear blower motor relay from the left side of rear heater-A/C unit, and test it (see «NORMALLY-OPEN TYPE B»(ref-243309-S28647392512006082300000) ). Is the relay OK? YES - Go to step 28 . NO - Replace the rear blower motor relay.
28. Measure the voltage between the No. 1 terminal of the rear blower motor relay 4P connector and body ground. Is there battery voltage? YES - Go to step 29 . NO - Repair open in the wire between the No. 55 fuse in the underhood fuse/relay box and the rear blower motor relay.
29. Turn the ignition switch ON (II).
30. Measure the voltage between the No. 2 terminal of the rear blower motor relay 4P connector and body ground. Is there battery voltage? YES - Go to step 31 . NO - Repair open in the wire between the No. 3 fuse in the driver s underdash fuse/relay box and the rear blower motor relay.
31. Turn the ignition switch OFF.
32. Check for continuity between the No. 4 terminal of the rear blower motor relay 4P connector and body ground. Is there continuity? YES - Repair open in the BLU/YEL wire between the rear blower motor relay and the rear blower motor. NO - Check for an open in the wire between the rear blower motor relay and body ground. If the wire is OK, check for poor ground at G501.

Scheme 61

Scheme 62

1. Test the rear air mix control motor (see «REAR AIR MIX CONTROL MOTOR TEST»(ref-243360-S28213206722006082300000) ). Is the rear air mix control motor OK? YES - Go to step 2. NO - Replace the air mix control motor (see «REAR AIR MIX CONTROL MOTOR TEST»(ref-243360-S28213206722006082300000) ), or repair the rear air mix control linkage or door.
2. Disconnect the rear air mix control motor 7P connector.
3. Disconnect climate control unit connector A (20P).
4. Check for continuity between the following terminals of climate control unit connector A (20 P) and the rear air mix contol motor 7P connector. 20P: 7P: No. 1 No. 2 No. 2 No. 2 Is there continuity? Go to step 5. Repair open in the wires(s) between the climate control motor.
5. Check for continuity between body ground and climate control unit connector A (20P) terminals No. 1 and No 2 individually. Is there continuity? YES - Repair short to body ground in the wire(s) between the climate control unit and the rear air mix control motor. NO - Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the orginal climate control unit.

Scheme 63

Scheme 64

1. Disconnect the rear air mix control motor 7P connector.
2. Disconnect climate control unit connector B (30P), and gauge control module connector B (36P).
3. Check for continuity between body ground and climate control unit connector B (30P) terminals No. 23. Is there continuity? YES - Repair any short to body ground in the wire(s) between the climate control unit, the gauge control module, and the rear air mix control motor. NO - Go to step 4 .
4. Turn the ignition switch ON (II), and check the same terminals for voltage. Is there any voltage? YES - Repair any short to power in the wire(s) between the climate control unit, the gauge control module, and the rear air mix control motor. This short may also damage the climate control unit. Repair the short to power before replacing the climate control unit. NO - Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit.

Scheme 65

1. Disconnect the rear air mix control motor 7P connector.
2. Disconnect climate control unit connector A (20P) and B (30P).
3. Check for continuity between following terminals of climate control unit connectors A (20P) and B (30P) and the rear air mix control motor 7P connector. 20P: 7P: No. 1 No. 1 No. 2 No. 2 No. 14 No. 3 30P: 7P: No. 3 No. 5 No. 23 No. 7 Is there continuity? YES - Check for loose wires or poor connections at climate control unit connectors A (20P) and B (30P) and at the rear air mix control motor 7P connector. If the connections are good, substitute a known-good rear air mix control motor, and recheck. If the symptom/indication goes away, replace the original rear air mix control motor. If the symptom continues, substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit. NO - Repair any open in the wire(s) between the climate control unit and the rear air mix control motor.

Scheme 66

Scheme 67

Scheme 68

Scheme 69

1. Check the No. 3 (7.5 A) fuse in the driver's underdash fuse/relay box. Is the fuse OK? YES - Go to step 2 . NO - Replace the fuse, and recheck.
2. Disconnect the recirculation control motor 7P connector.
3. Turn the ignition switch ON (II).
4. Measure the voltage between the No. 1 terminal of the recirculation control motor 7P connector and body ground. Is there battery voltage? YES - Go to step 5 . NO - Repair open in the wire between the No. 3 fuse in the driver's underdash fuse/relay box and the recirculation control motor.
5. Turn the ignition switch OFF.
6. Test the recirculation control motor (see «RECIRCULATION CONTROL MOTOR TEST»(ref-243302-S08919351542006082300000) ). Is the recirculation control motor OK? YES - Go to step 7 . NO - Replace the recirculation control motor.
7. Disconnect climate control unit connector B (30P).
8. Check for continuity between the No. 25 and No. 26 terminals of climate control unit connector B (30P) and body ground individually. Is there continuity? YES - Repair any short to body ground in the wire(s) between the climate control unit and the recirculation control motor. NO - Go to step 9 .
9. Turn the ignition switch ON (II), and check the same terminals for voltage. Is there any voltage? YES - Repair any short to power in the wire(s) between the climate control unit and the recirculation control motor. This short may also damage the climate control unit. Repair the short to power before replacing the climate control unit. NO - Go to step 10 .
10. Turn the ignition switch OFF.
11. Check for continuity between the following terminals of climate control unit connector B (30P) and the recirculation control motor 7P connector. 30P: 7P: No. 25 No. 5 No. 26 No. 7 Is there continuity? YES - Check for loose wires or poor connections at climate control unit connector B (30P) and at recirculation control motor 7P connector. If the connections are good, substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit. NO - Repair any open in the wire(s) between the climate control unit and the recirculation control motor.

ECT Sensor 1 Circuit Troubleshooting

Note. Before performing symptom troubleshooting, check for powertrain DTC (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 70

1. Check the malfunction indicator lamp (MIL). Does the malfunction indicator lamp come on? YES - Refer to the fuel and emissions systems DTCs (see «GENERAL TROUBLESHOOTING INFORMATION»(ref-243311-S34757370972006082300000) ). NO - Go to step 2 .
2. Turn the ignition switch OFF.
3. Disconnect the ECT sensor 1 2P connector.
4. Disconnect climate control unit connector B (30P).
5. Turn the ignition switch ON (II).
6. Measure the voltage between the No. 22 terminal of climate control unit connector B (30P) and body ground. Is there about 5 V? YES - Check for loose wires or poor connections at climate control unit connector B (30P) and at the ECT sensor 1 2P connector. If the connections are good, substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit. NO - Repair open in the wire between the climate control unit and the ECT sensor 1.

Note. Before performing symptom troubleshooting, check for powertrain DTC (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 71

Scheme 72

1. Check the No. 3 (7.5 A) fuse in the driver's underdash fuse/relay box. Is the fuse OK? YES - Go to step 2 . NO - Replace the fuse, and recheck.
2. Disconnect climate control unit connector B (30P).
3. Turn the ignition switch ON (II).
4. Measure the voltage between the No. 13 terminal of climate control unit connector B (30P) and body ground. Is there battery voltage? YES - Go to step 5 . NO - Repair open in the wire between the No. 3 fuse in the driver s underdash fuse/relay box and the climate control unit.
5. Turn the ignition switch OFF.
6. Check for voltage between the No. 29 terminal of climate control unit connector B (30P) and body ground. Is there less than 0.1 V? YES - Check for loose wires or poor connections at climate control unit connector B (30P). If the connections are good, substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit. NO - Check for an open in the wire between the climate control unit and body ground. If the wire is OK, check for poor ground at G401.

Scheme 73

Scheme 74

1. Disconnect navigation unit connector A (20P).
2. Disconnect climate control unit connector A (20P).
3. Check for continuity between the following terminals of climate control unit connector A (20P) and navigation unit connector A (20P). 20P 20P No. 17 No. 4 No. 18 No. 15 No. 19 No. 14 Is there continuity? YES - Go to step 4 . NO - Repair any open in the wire(s) between the climate control unit and the navigation unit.
4. Check for continuity between body ground and climate control unit connector A (20P) terminals No. 17, 18 and 19 individually. Is there continuity? YES - Repair any short to body ground in the wire(s) between the climate control unit and the navigation unit. NO - Check for loose wire or poor connections at climate control unit connector A (20P) and at the navigation unit connector A (20P). If the connections are good, substitute a known-good climate control unit and/or navigation unit, and recheck. If the symptom/indication goes away, replace the original climate control unit and/or navigation unit.

Rear Mode Control Motor Circuit Troubleshooting

Note. Before performing symptom troubleshooting, check for powertrain DTC (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 75

Scheme 76

Scheme 77

Scheme 78

1. Check the No. 3 (7.5 A) fuse in the driver s underdash fuse/relay box. Is the fuse OK? YES - Go to step 2 . NO - Replace the fuse, and recheck.
2. Turn the ignition switch ON (II).
3. Measure the voltage between the No. 1 terminal of the rear mode control motor 7P connector and body ground. Is there battery voltage? YES - Go to step 4 . NO - Repair open in the wire between the No. 3 fuse in the driver s underdash fuse/relay box and the rear mode control motor.
4. Turn the ignition switch OFF.
5. Disconnect the rear mode control motor 7P connector.
6. Test the rear mode control motor (see «REAR MODE CONTROL MOTOR TEST»(ref-243360-S18506146032006082300000) ). Is the rear mode control motor OK? YES - Go to step 7 . NO - Replace the rear mode control motor.
7. Disconnect climate control unit connector A (20P).
8. Check for continuity between the No. 11 and No. 12 terminals of climate control unit connector A (20P) and body ground individually. Is there continuity? YES - Repair any short to body ground in the wire(s) between the climate control unit and the rear mode control motor. NO - Go to step 9 .
9. Turn the ignition switch ON (II), and check the same terminals for voltage. Is there any voltage? YES - Repair any short to power in the wire(s) between the climate control unit and the rear mode control motor. This short may also damage the climate control unit. Repair the short to power before replacing the climate control unit. NO - Go to step 10 .
10. Turn the ignition switch OFF.
11. Check for continuity between the following terminals of climate control unit connector A (20P) and the rear mode control motor 7P connector. 20P: 7P: No. 11 No. 5 No. 12 No. 7 Is there continuity? YES - Check for loose wires or poor connections at climate control unit connector A (20P) and at rear mode control motor 7P connector. If the connections are good, substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit. NO - Repair any open in the wire(s) between the climate control unit and the rear mode control motor.

In-car Temperature Sensor Test

Check for a change in resistance by heating or cooling the sensor with a hair dryer.

Compare the resistance reading between the No. 1 and No. 2 terminals of the in-car temperature sensor with the specifications (Scheme 79); the resistance should be within the specifications.

Scheme 79

Scheme 80

1. Remove the in-car temperature sensor (A) from the dashboard, then disconnect the 2P connector (B) and the air hose (C). Be careful not to damage the sensor or the dashboard.
2. Install the sensor in the reverse order of removal. Be sure to connect the air hose securely.

Outside Air Temperature Sensor Test

Dip the sensor in ice water, and measure the resistance. Then pour warm water on the sensor, and check for a change in resistance.

Compare the resistance reading between the No. 1 and No. 2 terminals of the outside air temperature sensor with the specifications (Scheme 81); the resistance should be within the specifications.

Scheme 81

Scheme 82

1. Lift the tab (A) to release the lock, and remove the outside air temperature sensor (B) from the back of the front bumper beam. Disconnect the 2P connector (C) from the outside air temperature sensor.
2. Install the sensor in the reverse order of removal.

Sunlight Sensor Test

Turn the ignition switch ON (II). Measure the voltage between the terminals with the (+) probe on the No. 1 terminal and the (-) probe on the No. 2 terminal with the 2P connector connected. The voltage readings will not change under the light of a flashlight or a fluorescent lamp. Voltage should be

Scheme 83

1. 3.6-3.7 V or more with the sensor out of direct sunlight.
2. 3.3-3.5 V or less with the sensor in direct sunlight.

Scheme 84

1. Remove the sunlight sensor (A) from the dashboard, then disconnect the 2P connector (B). Be careful not to damage the sensor or the dashboard.
2. Install the sensor in the reverse order of removal.

Scheme 85

Scheme 86

1. Remove the center panel (see «CENTER PANEL REMOVAL/INSTALLATION»(ref-243318-S33281794622006082300000) ).
2. Remove the screws, and remove the climate control unit (A) with the brackets from the dashboard, then disconnect the connectors (B).
3. Remove the screws and the climate control unit (A) from the brackets (B).
4. Install the control unit in the reverse order of removal. After installation, operate the control unit controls to see whether it works properly.
5. Run the self-diagnostic function to confirm that there are no problems in the system (see «GENERAL TROUBLESHOOTING INFORMATION»(ref-243355-S17479280412006082300000) ).

Scheme 87

Scheme 88

1. Discharge the static electricity (which accumulated on you when you removed the climate control unit) by touching the door striker or other body parts.
2. Remove the self-tapping screws, then carefully separate the climate control unit cover (A) and the control unit (B) from the control unit display (C). Do not kink or pull on the wires between the display and the control unit. Do not touch the electronic components on the printed circuit board in the control unit.
3. Remove the bulb(s) with a flat-tip screwdriver.
4. Install the bulb(s) in the reverse order of removal.