Climate Control: Other Honda Pilot II

How To Check For DTCs With the HDS

Note. There are three methods used to check for DTCs. The recommended method is to use the Honda Diagnostic System (HDS) with the appropriate software, plugged into the data link connector (DLC), then go to B-CAN system diagnostic test mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ). The second method is to run the self-diagnostic function built into the climate control unit. The third method is to use the B-CAN system diagnostic test mode land mode 2 without the HDS (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE 1 AND TEST MODE 2 (WITHOUT THE HDS) ).

Scheme 15

1. Make sure the ignition switch is in LOCK (0).
2. Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.
3. Turn the ignition switch to ON (II).
4. Make sure the HDS communicates with the vehicle and the MICU. If it doesn't, troubleshoot the DLC circuit, (see «DLC CIRCUIT TROUBLESHOOTING»(ref-333558-S02093989162009072100000) )
5. Select HVAC/CLIMATE CONTROL in the BODY ELECTRICAL menu.
6. Select DTCs in the HVAC/CLIMATE CONTROL menu.
7. Check for DTCs. If any DTCs are indicated, write down the DTCs, then go to B-CAN system diagnostic test mode A (see «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A»(ref-333611-S24721524652009072100000) ). If no DTCs are indicated, refer to symptom troubleshooting.

Note. After troubleshooting, clear the DTCs with the HDS. For specific operations, refer to the user's manual that came with the HDS.

How To Use the HDS To Check For DTCs

Note. This method is only available if the HDS can communication with the MICU. If there is a communication problem with the HDS, go to B-CAN system diagnostic test mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

1. Make sure the ignition switch is in LOCK (0).
2. Connect the HDS to the data link connector (DLC).
3. Turn the ignition switch to ON (II).
4. Make sure the HDS communicates with the vehicle and the MICU. If it doesn't, troubleshoot the DLC circuit, (see «DLC CIRCUIT TROUBLESHOOTING»(ref-333558-S02093989162009072100000) )
5. Select HVAC/CLIMATE CONTROL in the BODY ELECTRICAL menu.
6. Select INSPECTION in the HVAC/CLIMATE CONTROL menu.
7. Select CLIMATE CONTROL SELF TEST in the INSPECTION menu.
8. Check for DTCs. If any DTCs are indicated, write down the DTCs, then go to the indicated DTC troubleshooting.

Note. After troubleshooting, clear the DTCs with the HDS. For specific operations, refer to the user's manual that came with the HDS.

The climate control unit has a self-diagnostic function. To run the self-diagnostic function, do the following

Scheme 16

1. Turn the ignition switch to LOCK (0), and then ON (II).
2. Press and hold the FAN ON/OFF button, then press the REAR WINDOW DEFOGGER button five times within 10 seconds. Release the FAN ON/OFF and REAR WINDOW DEFOGGER buttons; then the self-diagnostic begins. NOTE: The blower motor should run at various speeds regardless of what the panel is displaying. If there is any problem in the system, the system flashes "88 AUTO WINDSHIELD DEFROST" or alternately flashes "88 AUTO WINDSHIELD DEFROST" and one or more of the 14 segments (A through P). Refer to checking for DTCs. If there are no problems detected, the segments will not illuminate, and the system will appear to be turned off. Canceling the Self-diagnostic Function
3. Turn the ignition switch to LOCK (0), to cancel the self-diagnostic function. After completing the repair work, run the self-diagnostic function again to make sure that there are no other DTCs.

Checking for DTCs

The temperature display indicates single or multiple DTCs. If indicator segments A, B, C, E, G, J, M, N, AUTO, and WINDSHIELD DEFROST are on at the same time, there may be an open in the common ground wire. If no DTCs are present, the indicator remains blank.

DTC DETECTION ITEM REFERENCE TABLE

Scheme 17

The climate control unit has a mode that displays sensor inputs it receives. This mode shows you what the climate control unit is receiving from each of the sensors, one at a time, and it can help you determine if a sensor is faulty.

Check These Items Before Using the Sensor Input Display Mode

1. Turn the ignition switch to ON (II), and check the recirculation door function; press the recirculation button to switch from FRESH to RECIRC. The air volume and sound should change slightly.
2. Set the temperature control button to the desired test temperature. When selecting the test temperature, note these items: "Lo" temperature setting will default to MAX COOL, VENT, and RECIRC. "Hi" temperature setting will default to MAX HOT, FLOOR, and FRESH. 14 through 30°C settings will use the automatic climate control logic.
3. Turn the ignition switch to LOCK (0).

To Run the Sensor Input Display Mode, Follow These Steps

1. Turn the ignition switch to LOCK (0).
2. Press and hold both the AUTO and RECIRCULATION CONTROL buttons, then start the engine.
3. After the engine starts, release both buttons. The display panel control unit will flash the sensor number and then the value for that sensor. Record the value displayed.
4. To advance to the next sensor, press the REAR WINDOW DEFOGGER button. SENSOR INPUT DISPLAY MODE TABLE Sensor Item Displayed Value 0 In-car Temperature °C 1 Outside Air Temperature °C 2 Radiator Coolant Temperature °C 3 Solar Radiation Sensor Value: Dark = 00, Flashlight = 04, Cloudy = 10, Sunny = 65 kcal/m 2 .h 4 Front Evaporator Outlet Air Temperature °C 5 Driver's and Passenger's Air Mix Opening (Low value indicates cooler air distribution, higher value indicates warmer air distribution) % of opening 6 Front Vent Temperature Air Out (Fr TAO) °C 7 Vehicle Speed (Vehicle must be driven to display speed) km/h 8 A/C Pressure 10 kPa 9 Rear Air Mix Opening % of opening A Rear Vent Temperature Air Out (Rr TAO) °C B Rear Evaporator Outlet Air Temperature °C C Humidity Sensor Value % rh D Fog Margin °C E Solar Radiation azimuth (With navigation system) 10° F Solar Radiation angle of elevation (With navigation system) 10° NOTE: If the sensor value displays "Er" this indicates there is an open or short in the circuit or sensor. Check for DTCs using the HDS, or refer to checking DTCs by DTC indication. If necessary, compare the sensor input display to a known-good vehicle under the same test conditions. If the sensor is out of the normal range, refer to the sensor test or substitute a known-good sensor, and recheck.
5. To cancel the sensor input display mode, press the AUTO button or turn the ignition switch to LOCK (0).

Celsius to 1 Fahrenheit Conversion Table

FAHRENHEIT CONVERSION TABLE

FAHRENHEIT CONVERSION TABLE

Alphanumeric Conversion Table

ALPHANUMERIC CONVERSION TABLE

Checking the DTCs By HDS

DTC TROUBLESHOOTING TABLE

*1 '09-10 models

*2 '11 model

Humidity/In-Car Temperature Sensor

The humidity sensor consists of two sensors. One sensor is for humidity detection, and the other is for in-car temperature detection. When the climate control unit receives signals about the in-car condition from the humidity sensor, and judges that the humidity in the vehicle is very low, the climate control unit reduces the compressor run-time. Engine power loss is kept to a minimum, and fuel economy is increased.

Scheme 18

Humidity/In-Car Temperature Sensor Quality

The capacitance of the humidity sensor changes by the adsorption and the evaporation of moisture. The resistance change of the humidity sensor changes the output voltage.

Scheme 19

A/C Pressure Sensor

The A/C pressure sensor converts A/C pressure into electrical signals to the PCM.

Note. The pressures can be monitored using the HDS PGM-FI Data List.

Scheme 20

The response of the A/C pressure sensor is shown in the graph below.

Note. When the refrigerant is below 196 kPa (2.0 kgf/cm 2 , 28 psi) or above 3,140 kPa (32 kgf/cm 2 , 455 psi), the PCM turns the compressor relay off to protect the A/C compressor.

Scheme 21

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Scheme 24

Scheme 25

The i-Dual zone climate control system automatically controls the temperature and the vent mode of the air direction to the driver's and passenger's side, depending on the angle of the sun, and the direction of the vehicle. It calculates information such as date, time, longitude, and latitude from the navigation system, as well as the radiant strength of the sun from the sunlight sensor, to determine the appropriate mode position and temperature to be directed to each side. The i-Tri zone climate control system is an addition of the automatic controls with the temperature and the vent mode of the air direction to the rear section to the i-Dual zone climate control system.

Scheme 26

In the event that the navigation system malfunctions, or when driving in areas where the navigation system cannot determine the vehicle position (non-coverage areas, tunnels, etc.), the climate control system will operate the same as a vehicle without a navigation system.

CONNECTOR A

CONNECTOR A REFERENCE TABLE

Scheme 27

CONNECTOR B

CONNECTOR B REFERENCE TABLE

Scheme 28

CONNECTOR TERMINAL REFERENCE TABLE

Scheme 29

Scheme 30

Scheme 31

Scheme 32

Scheme 33

Note. If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN system diagnosis test mode A. (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A )

Scheme 34

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then ON (II).
3. Do the self-diagnostic with the HDS (see «HOW TO USE THE HDS TO CHECK FOR DTCS»(ref-333598-S11302038252009072100000) ).
4. Check for DTCs. Is DTC U0155 indicated? YES - Go to step 5 . NO - The system is OK at this time. Check for loose wires or poor connections on the gauge control module and climate control unit circuit.
5. Select UNIT INFORMATION in the BODY ELECTRICAL menu.
6. Select CONNECTED UNIT in the UNIT INFORMATION menu. Is the gauge control module detected? YES - Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ). • NO - Go to step 7
7. Disconnect the gauge control module 32P connector.
8. Disconnect climate control unit connector A (36P).
9. Check for continuity between the following terminals of the gauge control module 32P connector and climate control unit connector A (36P). 32P: 36P: No. 19 No. 36 No. 20 No. 35 Is there continuity? YES - Go to «GAUGE CONTROL MODULE INPUT TEST»(ref-333620-S28410140922009072100000) ). • NO - Repair open in the wire between the climate control unit and the gauge control module.

Scheme 35

Scheme 36

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then ON (II).
3. Do the self-diagnostic with the HDS (see «HOW TO USE THE HDS TO CHECK FOR DTCS»(ref-333598-S11302038252009072100000) ) or climate control unit (see «HOW TO USE THE CLIMATE CONTROL UNIT SELF-DIAGNOSTIC FUNCTION WITHOUT THE HDS»(ref-333598-S09685808252009072100000) ).
4. Check for DTCs. Is DTC B1213 or N indicated? YES - Go to step 5 . NO - Intermittent failure, check for loose wires or poor connections on the rear evaporator temperature sensor circuit.
5. Turn the ignition switch to LOCK (0).
6. Remove the rear evaporator temperature sensor (see «EVAPORATOR TEMPERATURE SENSOR REPLACEMENT»(ref-333580-S29104536792009072100000) ), and test it (see «EVAPORATOR TEMPERATURE SENSOR TEST»(ref-333580-S05013653122009072100000) ). Is the rear evaporator temperature sensor OK? YES - Go to step 7 . NO - Replace the rear evaporator temperature sensor (see «EVAPORATOR TEMPERATURE SENSOR REPLACEMENT»(ref-333580-S29104536792009072100000) ).
7. Disconnect climate control unit connector A (36P).
8. Check for continuity between climate control unit connector A (36P) terminal No. 28 and rear evaporator temperature sensor 2P connector terminal No. 2. Is there continuity? YES - Go to step 9 . NO - Repair open in the wire between the climate control unit and the rear evaporator temperature sensor.
9. Check for continuity between climate control unit connector A (36P) terminal No. 22 and rear evaporator temperature sensor 2P connector terminal No. 1. Is there continuity? YES - Check for loose wires or poor connections at climate control unit connector A (36P) and at the rear 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 (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ). • NO - Repair open in the wire between the climate control unit and the rear evaporator temperature sensor.

Scheme 37

Scheme 38

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then ON (II).
3. Do the self-diagnostic with the HDS (see «HOW TO USE THE HDS TO CHECK FOR DTCS»(ref-333598-S11302038252009072100000) ) or climate control unit (see «HOW TO USE THE CLIMATE CONTROL UNIT SELF-DIAGNOSTIC FUNCTION WITHOUT THE HDS»(ref-333598-S09685808252009072100000) ).
4. Check for DTCs. Is DTC B1214 or P indicated? YES - Go to step 5 . NO - Intermittent failure.
5. Turn the ignition switch to LOCK (0).
6. Remove the rear evaporator temperature sensor, and test it (see «REAR EVAPORATOR TEMPERATURE SENSOR REPLACEMENT»(ref-333599-S01360387722009072100000) and, «REAR EVAPORATOR TEMPERATURE SENSOR TEST»(ref-333599-S35126755752009072100000) ). Is the rear evaporator temperature sensor OK? YES - Go to step 7 . NO - Replace the rear evaporator temperature sensor (see «REAR EVAPORATOR TEMPERATURE SENSOR REPLACEMENT»(ref-333599-S01360387722009072100000) ).
7. Disconnect climate control unit connector A (36P).
8. Check for continuity between climate control unit connector A (36P) terminal No. 28 and body ground. Is there continuity? YES - Repair short to body ground in the wire between the climate control unit and the rear evaporator temperature sensor. • NO - Go to step 9 .
9. Check for continuity between climate control unit connector A (36P) terminals No. 22 and No. 28. Is there continuity? YES - Repair short in the wires between the climate control unit and the rear 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 (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ).

Scheme 39

Scheme 40

Scheme 41

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then ON (II).
3. Do the self-diagnostic with the HDS (see «HOW TO USE THE HDS TO CHECK FOR DTCS»(ref-333598-S11302038252009072100000) ) or climate control unit (see «HOW TO USE THE CLIMATE CONTROL UNIT SELF-DIAGNOSTIC FUNCTION WITHOUT THE HDS»(ref-333598-S09685808252009072100000) ).
4. Check for DTCs. Is DTC B1215 or C and WINDSHIELD DEFROST indicated? YES - Go to step 5 . NO - Intermittent failure, check for loose wires or poor connections on the recirculation control motor circuit.
5. Turn the ignition switch to LOCK (0).
6. Test the recirculation control motor (see «RECIRCULATION CONTROL MOTOR TEST»(ref-333580-S37037944402009072100000) ). Is the recirculation control motor OK? YES - Go to step 7 . NO - Replace the recirculation control motor (see «RECIRCULATION CONTROL MOTOR REPLACEMENT»(ref-333580-S34716718752009072100000) ).
7. Disconnect the recirculation control motor 7P connector.
8. Disconnect climate control unit connectors A (36P) and B (20P).
9. Check for continuity between the following terminals of climate control unit connectors A (36P), B (20P), and the recirculation control motor 7P connector. 36P: 7P: No. 22: No. 7 20P: 7P: No. 18: No. 3 No. 19: No. 4 No. 20: No. 5 Is there continuity? YES - Go to step 10 . NO - Repair open in the wire(s) between the climate control unit and the recirculation control motor.
10. Check for continuity between body ground and climate control unit connector B (20P) terminals No. 18, 19 and 20 individually. Is there continuity? YES - Repair short to body ground in the wire(s) between the climate control unit and the recirculation control motor. • NO - Go to step 11 .
11. Check for continuity between climate control unit connector B (20P) terminals as follows. CONNECTOR TERMINAL REFERENCE TABLE From Terminal To Terminals 18 19, 20 19 20 Is there continuity between any of the terminals? YES - Repair the short in the wires. • NO - Go to step 12 .
12. Reconnect climate control unit connectors A (36P) and B (20P).
13. Turn the ignition switch to ON (II), and check the same terminals for voltage to body ground. Is there any voltage? YES - Repair 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 replace the climate control unit. • NO - Check for loose wires or poor connections at climate control unit connectors A (36P) and B (20P) and at the 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 (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ).

Scheme 42

Scheme 43

Scheme 44

Scheme 45

Scheme 46

Scheme 47

Scheme 48

Scheme 49

Scheme 50

Scheme 51

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then ON (II).
3. Do the self-diagnostic with the HDS (see «HOW TO USE THE HDS TO CHECK FOR DTCS»(ref-333598-S11302038252009072100000) ) or climate control unit (see «HOW TO USE THE CLIMATE CONTROL UNIT SELF-DIAGNOSTIC FUNCTION WITHOUT THE HDS»(ref-333598-S09685808252009072100000) ).
4. Check for DTCs. Is DTC B1223 or M indicated? YES - Go to step 5 . NO - Intermittent failure, check for loose wires or poor connections on the rear blower motor circuit.
5. Turn the ignition switch to LOCK (0).
6. Check the No. 5 (RR BLOWER) (30 A) fuse in the auxiliary under-hood fuse/relay box and the No. 36 (10 A) fuse in the under-dash fuse/relay box. Are the fuses OK? YES - Go to step 7 . NO - Replace the fuse(s), and recheck. If fuse(s) blow again, check for a short in the No. 5 (RR BLOWER) (30 A) and No. 36 (10 A) fuse(s) circuit.
7. Connect rear blower motor 2P connector terminal No. 2 to body ground with a jumper wire.
8. Turn the ignition switch to ON (II). Does the rear blower motor run at high speed? YES - Go to step 9 . NO - Go to step 24 .
9. Turn the ignition switch to LOCK (0).
10. Disconnect the jumper wire.
11. Disconnect the rear power transistor 4P connector.
12. Check for continuity between rear power transistor 4P connector terminal No. 2 and body ground. Is there continuity? YES - Go to step 13 . 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 G801 (see «GROUND TO COMPONENTS INDEX»(ref-333605-S03893691772009072100000) ).
13. Connect rear power transistor 4P connector terminals No. 2 and No. 4 with a jumper wire.
14. Turn the ignition switch to ON (II). Does the rear blower motor run at high speed? YES - Go to step 15 . NO - Repair open in the ORN wire between the rear power transistor and the rear blower motor.
15. Turn the ignition switch to LOCK (0).
16. Disconnect the jumper wire.
17. Disconnect climate control unit connector A (36P).
18. Check for continuity between body ground and climate control unit connector A (36P) terminals No. 23 and No. 24 individually. Is there continuity? YES - Repair short to body ground in the wire(s) between the climate control unit and the rear power transistor. • NO - Go to step 19 .
19. Check for continuity between the following terminals of climate control unit connector A (36P) and the rear power transistor 4P connector. 36P: 4P: No. 23: No. 24 No. 3: No. 1 Is there continuity? YES - Go to step 20 . NO - Repair open in the wire(s) between the climate control unit and the rear power transistor.
20. Turn the ignition switch to ON (II).
21. Measure the voltage between body ground and climate control unit connector A (36P) terminals No. 23 and No. 24 individually. Is there any voltage? YES - Repair short to power in the wire(s). • NO - Go to step 22 .
22. Reconnect climate control unit connector A (36P).
23. Test the rear power transistor (see «REAR POWER TRANSISTOR TEST»(ref-333599-S26699643462009072100000) ). Is the rear power transistor OK? YES - Check for loose wires or poor connections at climate control unit connector A (36P) and at the rear power transistor 4P 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 (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ). • NO - Replace the rear power transistor (see «REAR POWER TRANSISTOR TEST»(ref-333599-S26699643462009072100000) ).
24. Disconnect the jumper wire.
25. Disconnect the rear blower motor 2P connector.
26. Measure the voltage between rear blower motor 2P connector terminal No. 1 and body ground. Is there battery voltage? YES - Replace the rear blower motor (see «REAR BLOWER MOTOR REPLACEMENT»(ref-333599-S24263125312009072100000) ). • NO - Go to step 27 .
27. Turn the ignition switch to LOCK (0).
28. Remove the rear blower motor relay from the dashboard wire harness, and test it (see «POWER RELAY TEST»(ref-333609-S14631099402009072100000) ). Is the relay OK? YES - Go to step 29 . NO - Replace the rear blower motor relay.
29. Measure the voltage between rear blower motor relay 4P socket terminal No. 1 and body ground. Is there battery voltage? YES - Go to step 30 . NO - Repair open in the wire between the No. 5 (RR BLOWER) (30A) in the auxiliary under-hood fuse box and the rear blower motor relay.
30. Turn the ignition switch to ON (II).
31. Measure the voltage between rear blower motor relay 4P socket terminal No. 2 ('09-10 models) or No. 4 ('11 model) and body ground. Is there battery voltage? YES - Go to step 32 . NO - Repair open in the wire between the No. 30 (10 A) fuse in the auxiliary under-hood fuse/relay box and the rear blower motor relay.
32. Turn the ignition switch to LOCK (0).
33. Check for continuity between rear blower motor relay 4P socket terminal No. 4 ('09-10 models) or No. 3 ('11 model) and body ground. Is there continuity? YES - Repair open in the GRY wire between the rear blower motor relay and the 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 G801 (see «GROUND TO COMPONENTS INDEX»(ref-333605-S03893691772009072100000) ).

Scheme 52

Scheme 53

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then ON (II).
3. Do the self-diagnostic with the HDS (see «HOW TO USE THE HDS TO CHECK FOR DTCS»(ref-333598-S11302038252009072100000) ) or climate control unit (see «HOW TO USE THE CLIMATE CONTROL UNIT SELF-DIAGNOSTIC FUNCTION WITHOUT THE HDS»(ref-333598-S09685808252009072100000) ).
4. Check for DTCs. Is DTC B1225 or A and AUTO indicated? YES - Go to step 5 . NO - Intermittent failure, check for loose wires or poor - connections on the in-car temperature sensor circuit.
5. Turn the ignition switch to LOCK (0).
6. Remove the humidity/in-car temperature sensor (see «HUMIDITY/IN-CAR TEMPERATURE SENSOR REPLACEMENT»(ref-333598-S27883183462009072100000) ), and test it (see «HUMIDITY/IN-CAR TEMPERATURE SENSOR TEST»(ref-333598-S07577454342009072100000) ). Is the in-car temperature sensor OK? YES - Go to step 7 . NO - Replace the humidity/in-car temperature sensor (see «HUMIDITY/IN-CAR TEMPERATURE SENSOR REPLACEMENT»(ref-333598-S27883183462009072100000) ).
7. Disconnect climate control unit connector A (36P).
8. Check for continuity between climate control unit connector A (36P) terminal No. 27 and humidity/in-car temperature sensor 4P connector terminal No. 4. Is there continuity? YES - Go to step 9 . NO - Repair open in the wire between the climate control unit and the in-car temperature sensor.
9. Check for continuity between climate control unit connector A (36P) terminal No. 22 and humidity/in-car temperature sensor 4P connector terminal No. 3. Is there continuity? YES - Check for loose wires or poor connections at climate control unit connector A (36P) and at the humidity/in-car temperature sensor 4P 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 (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ). • NO - Repair open in the wire between the climate control unit and the in-car temperature sensor.

Scheme 54

Scheme 55

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then ON (II).
3. Do the self-diagnostic with the HDS (see «HOW TO USE THE HDS TO CHECK FOR DTCS»(ref-333598-S11302038252009072100000) ) or climate control unit (see «HOW TO USE THE CLIMATE CONTROL UNIT SELF-DIAGNOSTIC FUNCTION WITHOUT THE HDS»(ref-333598-S09685808252009072100000) ).
4. Check for DTCs. Is DTC B1226 or B and AUTO indicated? YES - Go to step 5 . NO - Intermittent failure.
5. Turn the ignition switch to LOCK (0).
6. Remove the humidity/in-car temperature sensor (see «HUMIDITY/IN-CAR TEMPERATURE SENSOR REPLACEMENT»(ref-333598-S27883183462009072100000) ), and test it (see «HUMIDITY/IN-CAR TEMPERATURE SENSOR TEST»(ref-333598-S07577454342009072100000) ). Is the in-car temperature sensor OK? YES - Go to step 7 . NO - Replace the humidity/in-car temperature sensor (see «HUMIDITY/IN-CAR TEMPERATURE SENSOR REPLACEMENT»(ref-333598-S27883183462009072100000) ).
7. Disconnect climate control unit connector A (36P).
8. Check for continuity between climate control unit connector A (36P) terminal No. 27 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 - Go to step 9 .
9. Check for continuity between climate control unit connector A (36P) terminal No. 22 and No. 27. Is there continuity? YES - Repair short in the wires 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 (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ).

Scheme 56

Scheme 57

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then ON (II).
3. Do the self-diagnostic with the HDS (see «HOW TO USE THE HDS TO CHECK FOR DTCS»(ref-333598-S11302038252009072100000) ) or climate control unit (see «HOW TO USE THE CLIMATE CONTROL UNIT SELF-DIAGNOSTIC FUNCTION WITHOUT THE HDS»(ref-333598-S09685808252009072100000) ).
4. Check for DTCs. Is DTC B1227 or C and AUTO indicated? YES - Go to step 5 . NO - Intermittent failure, check for loose wires or poor connections on the outside air temperature sensor circuit.
5. Turn the ignition switch to LOCK (0).
6. Remove the outside air temperature sensor (see «OUTSIDE AIR TEMPERATURE SENSOR REPLACEMENT»(ref-333580-S28465124712009072100000) ), and test it (see «OUTSIDE AIR TEMPERATURE SENSOR TEST»(ref-333580-S19623130442009072100000) ). Is the outside air temperature sensor OK? YES - Go to step 7 . NO - Replace the outside air temperature sensor (see «OUTSIDE AIR TEMPERATURE SENSOR REPLACEMENT»(ref-333580-S28465124712009072100000) ).
7. Disconnect climate control unit connector A (36P).
8. Check for continuity between climate control unit connector A (36P) terminal No. 25 and outside air temperature sensor 2P connector terminal No. 2. Is there continuity? YES - Go to step 9 . NO - Repair open in the wire between the climate control unit and the outside air temperature sensor.
9. Check for continuity between climate control unit connector A (36P) terminal No. 22 and outside air temperature sensor 2P connector terminal No. 1. Is there continuity? YES - Check for loose wires or poor connections at climate control unit connector A (36P) 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 (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ). • NO - Repair open in the wire between the climate control unit and the outside air temperature sensor.

Scheme 58

Scheme 59

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then ON (II).
3. Do the self-diagnostic with the HDS (see «HOW TO USE THE HDS TO CHECK FOR DTCS»(ref-333598-S11302038252009072100000) ) or climate control unit (see «HOW TO USE THE CLIMATE CONTROL UNIT SELF-DIAGNOSTIC FUNCTION WITHOUT THE HDS»(ref-333598-S09685808252009072100000) ).
4. Check for DTCs. Is DTC B1228 or D and AUTO indicated? YES - Go to step 5 . NO - Intermittent failure.
5. Turn the ignition switch to LOCK (0).
6. Remove the outside air temperature sensor, and test it (see «OUTSIDE AIR TEMPERATURE SENSOR REPLACEMENT»(ref-333580-S28465124712009072100000) and, «OUTSIDE AIR TEMPERATURE SENSOR TEST»(ref-333580-S19623130442009072100000) ). Is the outside air temperature sensor OK? YES - Go to step 7 . NO - Replace the outside air temperature sensor (see «OUTSIDE AIR TEMPERATURE SENSOR REPLACEMENT»(ref-333580-S28465124712009072100000) ).
7. Disconnect climate control unit connector A (36P).
8. Check for continuity between climate control unit connector A (36P) terminal No. 25 and body ground. Is there continuity? YES - Repair short to body ground in the wire between the climate control unit and the outside air temperature sensor. • NO - Go to step 9 .
9. Check for continuity between climate control unit connector A (36P) terminals No. 22 and No. 25. Is there continuity? YES - Repair short in the wires between the climate control unit 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 (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ).

Scheme 60

Scheme 61

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then ON (II).
3. Do the self-diagnostic with the HDS (see «HOW TO USE THE HDS TO CHECK FOR DTCS»(ref-333598-S11302038252009072100000) ) or climate control unit (see «HOW TO USE THE CLIMATE CONTROL UNIT SELF-DIAGNOSTIC FUNCTION WITHOUT THE HDS»(ref-333598-S09685808252009072100000) ).
4. Check for DTCs. Is DTC B1229 or E and AUTO indicated? YES - Go to step 5 . NO - Intermittent failure, check for loose wires or poor connections on the sunlight sensor circuit.
5. Turn the ignition switch to LOCK (0).
6. Disconnect the sunlight sensor 5P connector.
7. Disconnect climate control unit connector A (36P).
8. Check for continuity between climate control unit connector A (36P) terminal No. 29 and sunlight sensor 5P connector terminal No. 4. Is there continuity? YES - Go to step 9 . NO - Repair open in the wire between the climate control unit and the sunlight sensor.
9. Check for continuity between climate control unit connector A (36P) terminal No. 22 and the sunlight sensor 5P connector terminal No. 2. Is there continuity? YES - Go to step 10 . NO - Repair open in the wire between the climate control unit and the sunlight sensor.
10. Reconnect the sunlight sensor 5P connector.
11. Reconnect climate control unit connector A (36P).
12. Test the sunlight sensor (see «SUNLIGHT SENSOR TEST»(ref-333598-S08115523042009072100000) ). Is the sunlight sensor OK? YES - Check for loose wires or poor connections at climate control unit connector A (36P) and at the sunlight sensor 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 (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ). • NO - Replace the sunlight sensor (see «SUNLIGHT SENSOR REPLACEMENT»(ref-333598-S32468842152009072100000) ).

Scheme 62

Scheme 63

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then ON (II).
3. Do the self-diagnostic with the HDS (see «HOW TO USE THE HDS TO CHECK FOR DTCS»(ref-333598-S11302038252009072100000) ) or climate control unit (see «HOW TO USE THE CLIMATE CONTROL UNIT SELF-DIAGNOSTIC FUNCTION WITHOUT THE HDS»(ref-333598-S09685808252009072100000) ).
4. Check for DTCs. Is DTC B1230 or F and AUTO indicated? YES - Go to step 5 . NO - Intermittent failure.
5. Turn the ignition switch to LOCK (0).
6. Disconnect the sunlight sensor 5P connector.
7. Disconnect climate control unit connector A (36P).
8. Check for continuity between climate control unit connector A (36P) terminal No. 29 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 9 .
9. Check for continuity between climate control unit connector A (36P) terminals No. 22 and No. 29. Is there continuity? YES - Repair short in the wires between the climate control unit and the sunlight sensor. • NO - Go to step 10 .
10. Reconnect the sunlight sensor 5P connector.
11. Reconnect climate control unit connector A (36P).
12. Test the sunlight sensor (see «SUNLIGHT SENSOR TEST»(ref-333598-S08115523042009072100000) ).

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 (see CLIMATE CONTROL UNIT REMOVAL/INSTALLATION )

NO - Replace the sunlight sensor (see SUNLIGHT SENSOR REPLACEMENT ).

Scheme 64

Scheme 65

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then ON (II).
3. Do the self-diagnostic with the HDS (see «HOW TO USE THE HDS TO CHECK FOR DTCS»(ref-333598-S11302038252009072100000) ) or climate control unit (see «HOW TO USE THE CLIMATE CONTROL UNIT SELF-DIAGNOSTIC FUNCTION WITHOUT THE HDS»(ref-333598-S09685808252009072100000) ).
4. Check for DTCs. Is DTC B1231 or G and AUTO indicated? YES - Go to step 5 . NO - Intermittent failure, check for loose wires or poor connections on the front evaporator temperature sensor circuit.
5. Turn the ignition switch to LOCK (0).
6. Remove the front evaporator temperature sensor, and test it (see «EVAPORATOR TEMPERATURE SENSOR REPLACEMENT»(ref-333580-S29104536792009072100000) , and «EVAPORATOR TEMPERATURE SENSOR TEST»(ref-333580-S05013653122009072100000) ). Is the front evaporator temperature sensor OK? YES - Go to step 7 . NO - Replace the front evaporator temperature sensor (see «EVAPORATOR TEMPERATURE SENSOR REPLACEMENT»(ref-333580-S29104536792009072100000) ).
7. Disconnect climate control unit connector A (36P).
8. Check for continuity between climate control unit connector A (36P) terminal No. 26 and front evaporator temperature sensor 2P connector terminal No. 2. Is there continuity? YES - Go to step 9 . NO - Repair open in the wire between the climate control unit and the front evaporator temperature sensor.
9. Check for continuity between climate control unit connector A (36P) terminal No. 22 and front evaporator temperature sensor 2P connector terminal No. 1. Is there continuity? YES - Check for loose wires or poor connections at climate control unit connector A (36P) and at the front 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 (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ). • NO - Repair open in the wire between the climate control unit and the front evaporator temperature sensor.

Scheme 66

Scheme 67

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then ON (II).
3. Do the self-diagnostic with the HDS (see «HOW TO USE THE HDS TO CHECK FOR DTCS»(ref-333598-S11302038252009072100000) ) or climate control unit (see «HOW TO USE THE CLIMATE CONTROL UNIT SELF-DIAGNOSTIC FUNCTION WITHOUT THE HDS»(ref-333598-S09685808252009072100000) ).
4. Check for DTCs. Is DTC B1232 or H and AUTO indicated? YES - Go to step 5 . NO - Intermittent failure.
5. Turn the ignition switch to LOCK (0).
6. Remove the front evaporator temperature sensor, and test it (see «EVAPORATOR TEMPERATURE SENSOR REPLACEMENT»(ref-333580-S29104536792009072100000) , and «EVAPORATOR TEMPERATURE SENSOR TEST»(ref-333580-S05013653122009072100000) ). Is the front evaporator temperature sensor OK? YES - Go to step 7 . NO - Replace the front evaporator temperature sensor (see «EVAPORATOR TEMPERATURE SENSOR REPLACEMENT»(ref-333580-S29104536792009072100000) ).
7. Disconnect climate control unit connector A (36P).
8. Check for continuity between climate control unit connector A (36P) terminal No. 26 and body ground. Is there continuity? YES - Repair short to body ground in the wire between the climate control unit and the front evaporator temperature sensor. • NO - Go to step 9 .
9. Check for continuity between climate control unit connector A (36P) terminals No. 22 and No. 26. Is there continuity? YES - Repair short in the wires between the climate control unit and the front 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 (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ).

Scheme 68

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then ON (II).
3. Do the self-diagnostic with the HDS (see «HOW TO USE THE HDS TO CHECK FOR DTCS»(ref-333598-S11302038252009072100000) ) or climate control unit (see «HOW TO USE THE CLIMATE CONTROL UNIT SELF-DIAGNOSTIC FUNCTION WITHOUT THE HDS»(ref-333598-S09685808252009072100000) ).
4. Check for DTCs. Is DTC B1233 or J and AUTO Indicated? YES - Go to step 5 . NO - Intermittent failure, check for loose wires or poor connections on the driver's air mix control motor circuit.
5. Turn the ignition switch to LOCK (0).
6. Test the driver's air mix control motor (see «FRONT AIR MIX CONTROL MOTOR TEST»(ref-333580-S13982375312009072100000) ). Is the driver's air mix control motor OK? YES - Go to step 7 . NO - Replace the driver's air mix control motor (see «FRONT AIR MIX CONTROL MOTOR REPLACEMENT»(ref-333580-S40051749632009072100000) ).
7. Disconnect the driver's air mix control motor 7P connector.
8. Disconnect climate control unit connectors A (36P) and B (20P).
9. Check for continuity between the following terminals of climate control unit connectors A (36P), B (20P), and the driver's air mix control motor 7P connector. 36P: 7P: No. 22: No. 5 20P: 7P: No. 4: No. 7 No. 12: No. 3 Is there continuity? YES - Check for loose wires or poor connections at climate control unit connectors A (36P) and B (20P) and at the driver's air mix 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 (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ). • NO - Repair open in the wire(s) between the climate control unit and the driver's air mix control motor.

Scheme 69

Scheme 70

Scheme 71

Scheme 72

Scheme 73

Scheme 74

Scheme 75

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then ON (II).
3. Do the self-diagnostic with the HDS (see «HOW TO USE THE HDS TO CHECK FOR DTCS»(ref-333598-S11302038252009072100000) ) or climate control unit (see «HOW TO USE THE CLIMATE CONTROL UNIT SELF-DIAGNOSTIC FUNCTION WITHOUT THE HDS»(ref-333598-S09685808252009072100000) ).
4. Check for DTCs. Is DTC B1234 or K and AUTO indicated? YES - Go to step 5 . NO - Intermittent failure.
5. Check for DTCs. Are these DTCs also present; B1237 or N and AUTO, and/or B1245 or G, and/or B2968 or A and WINDSHIELD DEFROST, and/or B2980 or B and WINDSHIELD DEFROST? YES - Go to step 13 . NO - Go to step 6 .
6. Turn the ignition switch to LOCK (0).
7. Test the driver's air mix control motor (see «FRONT AIR MIX CONTROL MOTOR TEST»(ref-333580-S13982375312009072100000) ). Is the driver's air mix control motor OK? YES - Go to step 8 . NO - Replace the driver's air mix control motor (see «FRONT AIR MIX CONTROL MOTOR REPLACEMENT»(ref-333580-S40051749632009072100000) ).
8. Disconnect the driver's air mix control motor 7P connector.
9. Disconnect climate control unit connector B (20P).
10. Check for continuity between body ground and climate control unit connector B (20P) terminal No. 12. Is there continuity? YES - Repair short to body ground in the wire between the climate control unit and the driver's air mix control motor. • NO - Go to step 11 .
11. Check for continuity between climate control unit connector B (20P) terminals No. 4 and No. 12. Is there continuity? YES - Repair the short in the wires. • NO - Go to step 12 .
12. Turn the ignition switch to ON (II), and measure the voltage between climate control unit connector B (20P) terminal No. 12 and body ground. Is there any voltage? YES - Repair short to power in the wire between the climate control unit and the driver's air mix control motor. This short may also damage the climate control unit. Repair the short to power before replace 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 (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ).
13. Turn the ignition switch to LOCK (0), and disconnect the climate control unit.
14. Disconnect these items: Driver's air mix control motor Passenger's air mix control motor Rear air mix control motor Humidity/in-car temperature sensor A/C pressure sensor
15. Check for continuity between climate control unit connector B (20P) terminal No. 12 and body ground. Is there continuity? YES - Repair short to body ground in the wire. • NO - Go to step 16 .
16. Turn the ignition switch to ON (II), and check the same terminal for voltage to body ground. Is there any voltage? YES -Repair short to power in the wire. This short may have also damaged the climate control unit. Repair the short to power before replacing the climate control unit. • NO - Go to step 17 .
17. Turn the ignition switch to LOCK (0).
18. Reconnect the climate control unit connector B (20P)
19. Turn the ignition switch to ON (II), and measure the voltage between climate control unit connector B (20P) terminal No. 12 and body ground. Is there about 5 V? YES - Go to step 20 . NO - Check for a loose wire or poor connection at climate control unit connector B (20P). If the connection is good, substitute a known-good climate control unit and recheck. If the symptom/indication goes away, replace the original climate control unit (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ).
20. While checking the same terminal for voltage to ground, reconnect these items individually and note the voltage reading each time: Driver's air mix control motor Passenger's air mix control motor Rear air mix control motor Humidity/in-car temperature sensor A/C pressure sensor Does the voltage remain at about 5 V? YES - Substitute a known-good climate control unit and recheck. If the symptom/indication goes away, replace the original climate control unit (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ). • NO - Replace the component that caused the voltage drop.

Scheme 76

Scheme 77

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then ON (II).
3. Do the self-diagnostic with the HDS (see «HOW TO USE THE HDS TO CHECK FOR DTCS»(ref-333598-S11302038252009072100000) ) or climate control unit (see «HOW TO USE THE CLIMATE CONTROL UNIT SELF-DIAGNOSTIC FUNCTION WITHOUT THE HDS»(ref-333598-S09685808252009072100000) ).
4. Check for DTCs. Is DTC B1235 or L and AUTO indicated? YES - Go to step 5 . NO - Intermittent failure, check for loose wires or poor connections on the driver's air mix control motor circuit.
5. Turn the ignition switch to LOCK (0).
6. Test the driver's air mix control motor (see «FRONT AIR MIX CONTROL MOTOR TEST»(ref-333580-S13982375312009072100000) ). Is the driver's air mix control motor OK? YES - Go to step 7 . NO - Replace the driver's air mix control motor (see «FRONT AIR MIX CONTROL MOTOR REPLACEMENT»(ref-333580-S40051749632009072100000) ), or repair the driver's air mix control linkage or door.
7. Disconnect the driver's air mix control motor 7P connector.
8. Disconnect climate control unit connector A (36P).
9. Check for continuity between the following terminals of climate control unit connector A (36P) and the driver's air mix control motor 7P connector. 36P: 7P: No. 7: No. 2 No. 8: No. 1 Is there continuity? YES - Go to step 10 . NO - Repair open in the wire(s) between the climate control unit and the driver's air mix control motor.
10. Check for continuity between body ground and climate control unit connector A (36P) terminals No. 7 and No. 8 individually. Is there continuity? YES - Repair short to body ground in the wire(s) between the climate control unit and the driver's air mix control motor. • NO - Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) )

Scheme 78

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then ON (II).
3. Do the self-diagnostic with the HDS (see «HOW TO USE THE HDS TO CHECK FOR DTCS»(ref-333598-S11302038252009072100000) ) or climate control unit (see «HOW TO USE THE CLIMATE CONTROL UNIT SELF-DIAGNOSTIC FUNCTION WITHOUT THE HDS»(ref-333598-S09685808252009072100000) ).
4. Check for DTCs. Is DTC B1236 or M and AUTO indicated? YES - Go to step 5 . NO - Intermittent failure, check for loose wires or poor connections on the passenger's air mix control motor circuit.
5. Turn the ignition switch to LOCK (0).
6. Test the passenger's air mix control motor (see «PASSENGER'S AIR MIX CONTROL MOTOR TEST»(ref-333598-S28426081962009072100000) ). Is the passenger's air mix control motor OK? YES - Go to step 7 . NO - Replace the passenger's air mix control motor (see «PASSENGER'S AIR MIX CONTROL MOTOR REPLACEMENT»(ref-333598-S11842915862009072100000) ).
7. Disconnect the passenger's air mix control motor 7P connector.
8. Disconnect climate control unit connectors A (36P) and B (20P).
9. Check for continuity between the following terminals of climate control unit connectors A (36P), B (20P) and the passenger's air mix control motor 7P connector. 36P: 7P No. 22: No. 5 20P: 7P No. 4: No. 7 No. 13: No. 3 Is there continuity? YES - Check for loose wires or poor connections at climate control unit connectors A (36P) and B (20P) and at the passenger's air mix 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 (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ). • NO - Repair open in the wire(s) between the climate control unit and the passenger's air mix control motor.

Scheme 79

Scheme 80

Scheme 81

Scheme 82

Scheme 83

Scheme 84

Scheme 85

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then ON (II).
3. Do the self-diagnostic with the HDS (see «HOW TO USE THE HDS TO CHECK FOR DTCS»(ref-333598-S11302038252009072100000) ) or climate control unit (see «HOW TO USE THE CLIMATE CONTROL UNIT SELF-DIAGNOSTIC FUNCTION WITHOUT THE HDS»(ref-333598-S09685808252009072100000) ).
4. Check for DTCs. Is DTC B1237 or N and AUTO indicated? YES - Go to step 5 . NO - Intermittent failure.
5. Check for DTCs. Are these DTCs also present; B1234 or K and AUTO, and/or B1245 or G, and/or B2968 or A and WINDSHIELD DEFROST, and/or B2980 or B and WINDSHIELD DEFROST? YES - Go to step 13 . NO - Go to step 6 .
6. Turn the ignition switch to LOCK (0).
7. Test the passenger's air mix control motor (see «PASSENGER'S AIR MIX CONTROL MOTOR TEST»(ref-333598-S28426081962009072100000) ). Is the passenger's air mix control motor OK? YES - Go to step 8 . NO - Replace the passenger's air mix control motor (see «PASSENGER'S AIR MIX CONTROL MOTOR REPLACEMENT»(ref-333598-S11842915862009072100000) ).
8. Disconnect the passenger's air mix control motor 7P connector.
9. Disconnect climate control unit connector B (20P).
10. Check for continuity between body ground and climate control unit connector B (20P) terminal No. 13. Is there continuity? YES - Repair short to body ground in the wire between the climate control unit and the passenger's air mix control motor. • NO - Go to step 11 .
11. Check for continuity between climate control unit connector B (20P) terminals No. 4 and No. 13 Is there continuity? YES - Repair the short in the wires. • NO - Go to step 12 .
12. Turn the ignition switch to ON (II), and measure the voltage between climate control unit connector B (20P) terminal No. 13 and body ground. Is there any voltage? YES - Repair short to power in the wire(s) between the climate control unit and the passenger's 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 (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ).
13. Turn the ignition switch to LOCK (0), and disconnect the climate control unit connectors A (36P) and B (20P).
14. Disconnect these items: Driver's air mix control motor Passenger's air mix control motor Rear air mix control motor Humidity/in-car temperature sensor A/C pressure sensor
15. Check for continuity between climate control unit connector B (20P) terminal No. 4 and body ground. Is there continuity? YES - Repair short to body ground in the wire. • NO - Go to step 16 .
16. Turn the ignition switch to ON (II), and check the same terminal for voltage to body ground. Is there any voltage? YES - Repair short to power in the wire. This short may have also damaged the climate control unit. Repair the short to power before replacing the climate control unit. • NO - Go to step 17 .
17. Turn the ignition switch to LOCK (0).
18. Reconnect the climate control unit connector B (20P).
19. Turn the ignition switch to ON (II), and measure the voltage between climate control unit connector B (20P) terminal No. 4 and body ground. Is there about 5 V? YES - Go to step 20 . NO - Check for a loose wire or poor connection at climate control unit connector B (20P). If the connection is good, substitute a known-good climate control unit and recheck. If the symptom/indication goes away, replace the original climate control unit (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ).
20. While checking the same terminal for voltage to ground, reconnect these items individually and note the voltage reading each time: Driver's air mix control motor Passenger's air mix control motor Rear air mix control motor Humidity/in-car temperature sensor A/C pressure sensor Does the voltage remain at about 5 V? YES - Substitute a known-good climate control unit and recheck. If the symptom/indication goes away, replace the original climate control unit (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ). • NO - Replace the component that caused the voltage drop.

Scheme 86

Scheme 87

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then ON (II).
3. Do the self-diagnostic with the HDS (see «HOW TO USE THE HDS TO CHECK FOR DTCS»(ref-333598-S11302038252009072100000) ) or climate control unit (see «HOW TO USE THE CLIMATE CONTROL UNIT SELF-DIAGNOSTIC FUNCTION WITHOUT THE HDS»(ref-333598-S09685808252009072100000) ).
4. Check for DTCs. Is DTC B1238 or P and AUTO indicated? YES - Go to step 5 . NO - Intermittent failure, check for loose wires or poor connections on the passenger's air mix control motor circuit.
5. Turn the ignition switch to LOCK (0).
6. Test the passenger's air mix control motor (see «PASSENGER'S AIR MIX CONTROL MOTOR TEST»(ref-333598-S28426081962009072100000) ). Is the passenger's air mix control motor OK? YES - Go to step 7 . NO - Replace the passenger's air mix control motor (see «PASSENGER'S AIR MIX CONTROL MOTOR REPLACEMENT»(ref-333598-S11842915862009072100000) ), or repair the passenger's air mix control linkage or door.
7. Disconnect the passenger's air mix control motor 7P connector.
8. Disconnect climate control unit connector A (36P).
9. Check for continuity between the following terminals of climate control unit connector A (36P) and the passenger's air mix control motor 7P connector. 36P: 7P: No. 6: No. 5 No. 2: No. 1 Is there continuity? YES - Go to step 10 . NO - Repair open in the wire(s) between the climate control unit and the passenger's air mix control motor.
10. Check for continuity between body ground and climate control unit connector A (36P) terminals No. 5 and No. 6 individually. Is there continuity? YES - Repair short to body ground in the wire(s) between the climate control unit and the passenger's air mix control motor. • NO - Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ).

Scheme 88

Scheme 89

Scheme 90

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then ON (II).
3. Do the self-diagnostic with the HDS (see «HOW TO USE THE HDS TO CHECK FOR DTCS»(ref-333598-S11302038252009072100000) ) or climate control unit (see «HOW TO USE THE CLIMATE CONTROL UNIT SELF-DIAGNOSTIC FUNCTION WITHOUT THE HDS»(ref-333598-S09685808252009072100000) ).
4. Check for DTCs. Is DTC B1239 or A indicated? YES - Go to step 5 . NO - Intermittent failure, check for loose wires or poor connections on the front mode control motor circuit.
5. Turn the ignition switch to LOCK (0).
6. Test the front mode control motor (see «FRONT MODE CONTROL MOTOR TEST»(ref-333580-S28850960722009072100000) ). Is the front mode control motor OK? YES - Go to step 7 . NO - Replace the front mode control motor (see «FRONT MODE CONTROL MOTOR REPLACEMENT»(ref-333580-S18760004912009072100000) ).
7. Disconnect the front mode control motor 7P connector.
8. Disconnect climate control unit connectors A (36P) and B (20P).
9. Check for continuity between the following terminals of climate control unit connectors A (36P) and B (20P), and the front mode control motor 7P connector. 20P: 7P: No. 14: No. 3 No. 15: No. 4 No. 16: No. 5 No. 17: No. 6 36P: 7P: No. 22: No. 7 Is there continuity? YES - Go to step 10 . NO - Repair open in the wire(s) between the climate control unit and the front mode control motor.
10. Check for continuity between body ground and climate control unit connector B (20P) terminals No. 14, No. 15, No. 16 and No. 17 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 - Go to step 11 .
11. Check for continuity between climate control unit connector B (20P) terminals as follows. CONNECTOR TERMINAL REFERENCE TABLE From Terminal To Terminals 14 15, 16, 17 15 16, 17 16 17 Is there continuity between any of the terminals? YES - Repair the short in the wires. • NO - Go to step 12 .
12. Turn the ignition switch to ON (II), and check the same terminals for voltage to body ground. Is there any voltage? YES - Repair short to power in the wire(s) between the climate control unit and the front mode control motor. This short may also damage the climate control unit. Repair the short to power before replacing the climate control unit. • NO - Check for loose wires or poor connections at climate control unit connector B (20P) and at the front 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 (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) )

Scheme 91

Scheme 92

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then ON (II).
3. Do the self-diagnostic with the HDS (see «HOW TO USE THE HDS TO CHECK FOR DTCS»(ref-333598-S11302038252009072100000) ) or climate control unit (see «HOW TO USE THE CLIMATE CONTROL UNIT SELF-DIAGNOSTIC FUNCTION WITHOUT THE HDS»(ref-333598-S09685808252009072100000) ).
4. Check for DTCs. Is DTC B1240 or B indicated? YES - Go to step 5 . NO - Intermittent failure, check for loose wires or poor connections on the mode control motor circuit.
5. Turn the ignition switch to LOCK (0).
6. Test the front mode control motor, (see «FRONT MODE CONTROL MOTOR TEST»(ref-333580-S28850960722009072100000) ) Is the front mode control motor OK? YES - Go to step 7 . NO - Replace the front mode control motor (see «FRONT MODE CONTROL MOTOR REPLACEMENT»(ref-333580-S18760004912009072100000) ), or repair the front mode control linkage or doors.
7. Disconnect the front mode control motor 7P connector.
8. Disconnect climate control unit connector A (36P).
9. Check for continuity between the following terminals of climate control unit connector A (36P) and the front mode control motor 7P connector. 36P: 7P: No. 9: No. 1 No. 10: No. 2 Is there continuity? YES - Go to step 10 . NO - Repair open in the wire(s) between the climate control unit and the front mode control motor.
10. Check for continuity between body ground and climate control unit connector A (36P) terminals No. 9 and No. 10 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 original climate control unit (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) )

Scheme 93

Scheme 94

Scheme 95

Scheme 96

Scheme 97

Scheme 98

Scheme 99

Scheme 100

Scheme 101

Scheme 102

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then ON (II).
3. Do the self-diagnostic with the HDS (see «HOW TO USE THE HDS TO CHECK FOR DTCS»(ref-333598-S11302038252009072100000) ) or climate control unit (see «HOW TO USE THE CLIMATE CONTROL UNIT SELF-DIAGNOSTIC FUNCTION WITHOUT THE HDS»(ref-333598-S09685808252009072100000) ).
4. Check for DTCs. Is DTC B1241 or C indicated? YES - Go to step 5 . NO - Intermittent failure, check for loose wires or poor connections on the front blower motor circuit.
5. Turn the ignition switch to LOCK (0).
6. Check the No. 9 (40A) fuse in the under-hood fuse/relay box, and the No. 36 (10A) fuse in the under-dash fuse/relay box. Are the fuses OK? YES - Go to step 7 . NO - Replace the fuse(s), and recheck. If fuse(s) blow again, check for a short in the No. 9 (40A) and No. 36 (10A) fuse(s) circuit.
7. Connect front blower motor 2P connector terminal No. 2 to body ground with a jumper wire.
8. Turn the ignition switch to ON (II). Does the front blower motor run at high speed? YES - Go to step 9 . NO - Go to step 24 .
9. Turn the ignition switch to LOCK (0).
10. Disconnect the jumper wire.
11. Disconnect the front power transistor 4P connector.
12. Check for continuity between front power transistor 4P connector terminal No. 2 and body ground. Is there continuity? YES - Go to step 13 . NO - Check for an open in the wire between the front power transistor and body ground. If the wire is OK, check for poor ground at G202 (see «GROUND TO COMPONENTS INDEX»(ref-333605-S03893691772009072100000) ).
13. Connect front power transistor 4P connector terminals No. 2 and No. 4 with a jumper wire.
14. Turn the ignition switch to ON (II). Does the front blower motor run at high speed? YES - Go to step 15 . NO - Repair open in the GRN wire between the front power transistor and the front blower motor.
15. Turn the ignition switch to LOCK (0).
16. Disconnect the jumper wire.
17. Disconnect climate control unit connector A (36P).
18. Check for continuity between body ground and climate control unit connector A (36P) terminals No. 2 and No. 3 individually. Is there continuity? YES - Repair short to body ground in the wire(s) between the climate control unit and the front power transistor. • NO - Go to step 19 .
19. Check for continuity between the following terminals of climate control unit connector A (36P) and the front power transistor 4P connector. 36P: 4P: No. 2: No. 3 No. 3: No. 1 Is there continuity? YES - Go to step 20 . NO - Repair open in the wire(s) between the climate control unit and the front power transistor.
20. Turn the ignition switch to ON (II).
21. Measure the voltage between body ground and climate control unit connector A (36P) terminals No. 2 and No. 3 individually. Is there any voltage? YES - Repair short to power in the wire(s). • NO - Go to step 22 .
22. Reconnect climate control unit connector A (36P).
23. Test the front power transistor (see «FRONT POWER TRANSISTOR TEST»(ref-333580-S08970594362009072100000) ). Is the front power transistor OK? YES - Check for loose wires or poor connections at climate control unit connector A (36P) and at the front power transistor 4P 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 (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ) • NO - Replace the front power transistor (see «EVAPORATOR TEMPERATURE SENSOR REPLACEMENT»(ref-333580-S29104536792009072100000) ).
24. Disconnect the jumper wire.
25. Disconnect the front blower motor 2P connector.
26. Measure the voltage between front blower motor 2P connector terminal No. 1 and body ground. Is there battery voltage? YES - Replace the front blower motor (see «BLOWER UNIT COMPONENT REPLACEMENT»(ref-333580-S20644170882009072100000) ). • NO - Go to step 27 .
27. Turn the ignition switch to LOCK (0).
28. Remove the front blower motor relay from the under-hood fuse/relay box, and test it. (see «POWER RELAY TEST»(ref-333609-S14631099402009072100000) ) Is the relay OK? YES - Go to step 29 . NO - Replace the front blower motor relay.
29. Measure the voltage between front blower motor relay 4P socket terminal No. 1 and body ground. Is there battery voltage? YES - Go to step 30 . NO - Replace the under-hood fuse/relay box (see «REMOVAL AND INSTALLATION»(ref-333606-S34447651612009072100000) ).
30. Turn the ignition switch to ON (II).
31. Measure the voltage between front blower motor relay 4P socket terminal No. 3 and body ground. Is there battery voltage? YES - Go to step 32 . NO - Repair open in the wire between the No. 36 (10A) fuse in the under-dash fuse/relay box and the front blower motor relay.
32. Turn the ignition switch to LOCK (0).
33. Check for continuity between front blower motor relay 4P socket terminal No. 4 and body ground. Is there continuity? YES - Repair open in the WHT wire between the front blower motor relay and the blower motor. • NO - Check for an open in the wire between the front blower motor relay and body ground. If the wire is OK, check for poor ground at G202 (see «GROUND TO COMPONENTS INDEX»(ref-333605-S03893691772009072100000) ).

Scheme 103

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then ON (II).
3. Do the self-diagnostic with the HDS (see «HOW TO USE THE HDS TO CHECK FOR DTCS»(ref-333598-S11302038252009072100000) ) or climate control unit (see «HOW TO USE THE CLIMATE CONTROL UNIT SELF-DIAGNOSTIC FUNCTION WITHOUT THE HDS»(ref-333598-S09685808252009072100000) ).
4. Check for DTCs. Is DTC B1244 or F indicated? YES - Go to step 5 . NO - Intermittent failure, check for loose wires or poor connections on the rear air mix control motor circuit.
5. Turn the ignition switch to LOCK (0).
6. Test the rear air mix control motor (see «REAR AIR MIX CONTROL MOTOR TEST»(ref-333599-S34401359872009072100000) ). Is the rear air mix control motor OK? YES - Go to step 7 . NO - Replace the rear air mix control motor (see «REAR AIR MIX CONTROL MOTOR REPLACEMENT»(ref-333599-S08655267812009072100000) ).
7. Disconnect the rear air mix control motor 7P connector.
8. Disconnect climate control unit connectors A (36P) and B (20P).
9. Check for continuity between the following terminals of climate control unit connectors A (36P), B (20P), and the rear air mix control motor 7P connector. 36P: 7P: No. 22 No. 7 20P: 7P: No. 4 No. 5 No. 11 No. 3 Is there continuity? YES - Check for loose wires or poor connections at climate control unit connectors A (36P), B (20P), and at the rear air mix 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 (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ). • NO - Repair open in the wire(s) between the climate control unit and the rear air mix control motor.

Scheme 104

Scheme 105

Scheme 106

Scheme 107

Scheme 108

Scheme 109

Scheme 110

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then ON (II).
3. Do the self-diagnostic with the HDS (see «HOW TO USE THE HDS TO CHECK FOR DTCS»(ref-333598-S11302038252009072100000) ) or climate control unit (see «HOW TO USE THE CLIMATE CONTROL UNIT SELF-DIAGNOSTIC FUNCTION WITHOUT THE HDS»(ref-333598-S09685808252009072100000) ).
4. Check for DTCs. Is DTC B1245 or G indicated? YES - Go to step 5 . NO - Intermittent failure.
5. Check for DTCs. Are these DTCs also present; B1234 or K and AUTO, and/or B1237 or N and AUTO, and/or B2968 or A and WINDSHIELD DEFROST, and/or B2980 or B and WINDSHIELD DEFROST? YES - Go to step 13 . NO - Go to step 6 .
6. Turn the ignition switch to LOCK (0).
7. Test the rear air mix control motor (see «REAR AIR MIX CONTROL MOTOR TEST»(ref-333599-S34401359872009072100000) ). Is the rear air mix control motor OK? YES - Go to step 8 . NO - Replace the rear air mix control motor (see «REAR AIR MIX CONTROL MOTOR REPLACEMENT»(ref-333599-S08655267812009072100000) ).
8. Disconnect the rear air mix control motor 7P connector.
9. Disconnect climate control unit connector B (20P).
10. Check for continuity between climate control unit connector B (20P) terminal No. 11 and body ground. Is there continuity? YES - Repair short to body ground in the wire between the climate control unit and the rear air mix control motor. • NO - Go to step 11 .
11. Check for continuity between climate control unit connector B (20P) terminal No. 4 and No. 11. Is there continuity? YES - Repair the short in the wires. • NO - Go to step 12 .
12. Turn the ignition switch to ON (II), and measure the voltage between climate control unit connector B (20P) terminal No. 11 and body ground. Is there any voltage? YES - Repair short to power in the wire between the climate control unit 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 (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ).
13. Turn the ignition switch to LOCK (0), and disconnect climate control unit connector B (20P).
14. Disconnect these items: Driver's air mix control motor Passenger's air mix control motor Rear air mix control motor Humidity/in-car temperature sensor A/C pressure sensor
15. Check for continuity between climate control unit connector B (20P) terminal No. 4 and body ground. Is there continuity? YES - Repair short to body ground in the wire. • NO - Go to step 16 .
16. Turn the ignition switch to ON (II), and check the same terminal for voltage to body ground. Is there any voltage? YES - Repair short to power in the wire. This short may have also damaged the climate control unit. Repair the short to power before replacing the climate control unit. • NO - Go to step 17 .
17. Turn the ignition switch to LOCK (O).
18. Reconnect the climate control unit connector B (20P).
19. Turn the ignition switch to ON (II), and measure the voltage between climate control unit connector B (20P) terminal No. 4 and body ground. Is there about 5 V? YES - Go to step 20 . NO - Check for a loose wire or poor connection at climate control unit connector B (20P). If the connection is good, substitute a known-good climate control unit and recheck. If the symptom/indication goes away, replace the original climate control unit (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ).
20. While checking the same terminal for voltage to ground, reconnect these items individually and note the voltage reading each time: Driver's air mix control motor Passenger's air mix control motor Rear air mix control motor Humidity/in-car temperature sensor A/C pressure sensor Does the voltage remain at about 5 V? YES - Substitute a known-good climate control unit and recheck. If the symptom/indication goes away, replace the original climate control unit (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ). • NO - Replace the component that caused the voltage drop.

Scheme 111

Scheme 112

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then ON (II).
3. Do the self-diagnostic with the HDS (see «HOW TO USE THE HDS TO CHECK FOR DTCS»(ref-333598-S11302038252009072100000) ) or climate control unit (see «HOW TO USE THE CLIMATE CONTROL UNIT SELF-DIAGNOSTIC FUNCTION WITHOUT THE HDS»(ref-333598-S09685808252009072100000) ).
4. Check for DTCs. Is DTC B1246 or H indicated? YES - Go to step 5 . NO - Intermittent failure, check for loose wires or poor connections on the rear air mix control motor circuit.
5. Turn the ignition switch to LOCK (0).
6. Test the rear air mix control motor (see «REAR AIR MIX CONTROL MOTOR TEST»(ref-333599-S34401359872009072100000) ). Is the rear air mix control motor OK? YES - Go to step 7 . NO - Replace the rear air mix control motor (see «REAR AIR MIX CONTROL MOTOR REPLACEMENT»(ref-333599-S08655267812009072100000) ), or repair the rear air mix control linkage or door.
7. Disconnect the rear air mix control motor 7P connector.
8. Disconnect climate control unit connector A (36P).
9. Check for continuity between the following terminals of climate control unit connector A (36P) and the rear air mix control motor 7P connector. 36P: 7P: No. 13 No. 2 No. 14 No. 1 Is there continuity? YES - Go to step 10 . NO - Repair open in the wire(s) between the climate control unit and the rear air mix control motor.
10. Check for continuity between body ground and climate control unit connector A (36P) terminals No. 13 and No. 14 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 original climate control unit (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ).

Scheme 113

Scheme 114

Scheme 115

Scheme 116

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then ON (II).
3. Do the self-diagnostic with the HDS (see «HOW TO USE THE HDS TO CHECK FOR DTCS»(ref-333598-S11302038252009072100000) ).
4. Check for DTCs. Is DTC B2965 indicated? YES - Go to step 5 . NO - Intermittent failure, check for loose wires or poor connections on the rear climate control panel and climate control unit circuit.
5. Turn the ignition switch to LOCK (0).
6. Disconnect the rear climate control panel 12P connector.
7. Turn the ignition switch to ON (II).
8. Measure the voltage between rear climate control panel 12P connector terminal No. 12 and body ground. Is there battery voltage? YES - Go to step 9 . NO - Repair open in the wire between the No. 36 (10A) fuse in the under-dash fuse/relay box and the rear climate control panel.
9. Turn the ignition switch to LOCK (0).
10. Check for continuity between rear climate control panel 12P connector terminal No. 9 and body ground. Is there continuity? YES - Go to step 11 . NO - Check for an open in the wire between the rear climate control panel and body ground. If the wire is OK, check for poor ground at G801 (see «GROUND TO COMPONENTS INDEX»(ref-333605-S03893691772009072100000) ).
11. Disconnect climate control unit connector B (20P).
12. Check for continuity between the following terminals of climate control unit connector B (20P) terminal No. 3 and rear climate control panel 12P connector terminal No. 5. Is there continuity? YES - Go to step 13 . NO - Repair open in the wire(s) between the climate control unit and the rear climate control panel.
13. Check for continuity between body ground and climate control unit connector B (20P) terminal No. 3. Is there continuity? YES - Repair short to body ground in the wire(s) between the climate control unit and the rear climate control panel. • NO - Substitute a known-good rear climate control panel, and recheck. If the symptom/indication goes away, replace the original climate control unit (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) )

Scheme 117

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then ON (II).
3. Do the self-diagnostic with the HDS (see «HOW TO USE THE HDS TO CHECK FOR DTCS»(ref-333598-S11302038252009072100000) ) or climate control unit (see «HOW TO USE THE CLIMATE CONTROL UNIT SELF-DIAGNOSTIC FUNCTION WITHOUT THE HDS»(ref-333598-S09685808252009072100000) ).
4. Check for DTCs. Is DTC B2967 or A and WINDSHIELD DEFROST indicated? YES - Go to step 5 . NO - Intermittent failure, check for loose wires or poor connections on the humidity sensor circuit.
5. Turn the ignition switch to LOCK (0).
6. Remove the humidity/in-car temperature sensor (see «HUMIDITY/IN-CAR TEMPERATURE SENSOR REPLACEMENT»(ref-333598-S27883183462009072100000) ), and test it (see «HUMIDITY/IN-CAR TEMPERATURE SENSOR TEST»(ref-333598-S07577454342009072100000) ). Is the humidity sensor OK? YES - Go to step 7 7. NO - Replace the humidity/in-car temperature sensor (see «HUMIDITY/IN-CAR TEMPERATURE SENSOR REPLACEMENT»(ref-333598-S27883183462009072100000) ).
7. Disconnect the humidity/in-car temperature sensor 4P connector.
8. Disconnect climate control unit connectors A (36P) and B (20P).
9. Check for continuity between the following terminals of climate control unit connectors A (36P), B (20P) and the humidity/in-car temperature sensor 4P connector. 36P: 4P: No. 22 No. 3 20P: 4P: No. 4 No. 1 No. 5 No. 2 Is there continuity? YES - Check for loose wires or poor connections at climate control unit connectors A (36P), B (20P) and at the humidity/in-car temperature sensor 4P 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 (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ). • NO - Repair open in the wire(s) between the climate control unit and the humidity sensor.

Scheme 118

Scheme 119

Scheme 120

Scheme 121

Scheme 122

Scheme 123

Scheme 124

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then ON (II).
3. Do the self-diagnostic with the HDS (see «HOW TO USE THE HDS TO CHECK FOR DTCS»(ref-333598-S11302038252009072100000) ) or climate control unit (see «HOW TO USE THE CLIMATE CONTROL UNIT SELF-DIAGNOSTIC FUNCTION WITHOUT THE HDS»(ref-333598-S09685808252009072100000) ).
4. Check for DTCs. Is DTC B2968 or A and WINDSHIELD DEFROST indicated? YES - Go to step 5 . NO - Intermittent failure.
5. Check for DTCs. Are these DTCs also present; B1234 or K and AUTO, and/or B1237 or N and AUTO, and/or B1245 or G, and/or B2980 or B and WINDSHIELD DEFROST? YES - Go to step 13 . NO - Go to step 6 .
6. Turn the ignition switch to LOCK (0).
7. Remove the humidity/in-car temperature sensor (see «HUMIDITY/IN-CAR TEMPERATURE SENSOR REPLACEMENT»(ref-333598-S27883183462009072100000) ), and test it (see «HUMIDITY/IN-CAR TEMPERATURE SENSOR TEST»(ref-333598-S07577454342009072100000) ). Is the humidity sensor OK? YES - Go to step 8 . NO - Replace the humidity/in-car temperature sensor (see «HUMIDITY/IN-CAR TEMPERATURE SENSOR REPLACEMENT»(ref-333598-S27883183462009072100000) ).
8. Disconnect the humidity/in-car temperature sensor 4P connector.
9. Disconnect climate control unit connector B (20P).
10. Check for continuity between body ground and climate control unit connector B (20P) terminal No. 5. Is there continuity? YES - Repair short to body ground in the wire between the climate control unit and the humidity sensor. • NO - Go to step 11 .
11. Check for continuity between climate control unit connector B (20P) terminals No. 4 and No. 5. Is there continuity? YES - Repair the short in the wires. • NO - Go to step 12 .
12. Turn the ignition switch to ON (II), and measure the voltage between climate control unit connector B (20P) terminal No. 5 and body ground. Is there any voltage? YES - Repair short to power in the wire between the climate control unit and the humidity sensor. 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 (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) )
13. Turn the ignition switch to LOCK (0), and disconnect climate control unit connector B (20P).
14. Disconnect these items: Driver's air mix control motor Passenger's air mix control motor Rear air mix control motor Humidity/in-car temperature sensor A/C pressure sensor
15. Check for continuity between climate control unit connector B (20P) terminal No. 4 and body ground. Is there continuity? YES - Repair short to body ground in the wire. • NO - Go to step 16 .
16. Turn the ignition switch to ON (II), and check the same terminal for voltage to body ground. Is there any voltage? YES - Repair short to power in the wire. This short may have also damaged the climate control unit. Repair the short to power before replacing the climate control unit. • NO - Go to step 17 .
17. Turn the ignition switch to LOCK (0).
18. Reconnect the climate control unit connector B (20P).
19. Turn the ignition switch to ON (II), and measure the voltage between climate control unit connector B (20P) terminal No. 4 and body ground. Is there about 5 V? YES - Go to step 20 . NO - Check for a loose wire or poor connection at climate control unit connector B (20P). If the connection is good, substitute a known-good climate control unit and recheck. If the symptom/indication goes away, replace the original climate control unit (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ).
20. While checking the same terminal for voltage to ground, reconnect these items individually and note the voltage reading each time: Driver's air mix control motor Passenger's air mix control motor Rear air mix control motor Humidity/in-car temperature sensor A/C pressure sensor Does the voltage remain at about 5 V? YES - Substitute a known-good climate control unit and recheck. If the symptom/indication goes away, replace the original climate control unit (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ). • NO - Replace the component that caused the voltage drop.

Note. If you are troubleshooting multiple DTCs, be sure to follow the instructions in the B-can system diagnosis test mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

Scheme 125

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then ON (II).
3. Do the self-diagnostic with the HDS (see «HOW TO USE THE HDS TO CHECK FOR DTCS»(ref-333598-S11302038252009072100000) ).
4. Check the DTCs. Is DTC B2969 indicated? YES - Go to step 6 . NO - The system is OK at this time. Check for loose wires or poor connections on the MICU and climate control unit circuit.
5. Select UNIT INFORMATION in the BODY ELECTRICAL menu.
6. Select CONNECTED UNIT in the UNIT INFORMATION menu. Is the MICU detected? YES -Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ) • NO - Go to step 7 .
7. Disconnect under-dash fuse/relay box connector T (34P).
8. Disconnect climate control unit connector A (36P).
9. Check for continuity between the following terminals of climate control unit connector A (36P) and under-dash fuse/relay box connector T (34P). 36P: 34P: No. 35 No. 12 No. 36 No. 29 Is there continuity? YES - Go to the MICU input test (see «CONTROL UNIT INPUT TEST»(ref-333611-S30921808772009072100000) ). • NO - Repair open in the wire(s) between the MICU and the climate control unit.

Scheme 126

Scheme 127

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then ON (II).
3. Do the self-diagnostic with the HDS (see «HOW TO USE THE HDS TO CHECK FOR DTCS»(ref-333598-S11302038252009072100000) ) or climate control unit (see «HOW TO USE THE CLIMATE CONTROL UNIT SELF-DIAGNOSTIC FUNCTION WITHOUT THE HDS»(ref-333598-S09685808252009072100000) ).
4. Check for DTCs. Is DTC B2979 or B and WINDSHIELD DEFROST indicated? YES - Go to step 5 . NO - Intermittent failure, check for loose wires or poor connections on the A/C pressure sensor circuit.
5. Turn the ignition switch to LOCK (0).
6. Disconnect the A/C pressure sensor 3P connector.
7. Disconnect climate control unit connector A (36P) and B (20P).
8. Check for continuity between the following terminals of climate control unit connectors A (36P), B (20P) and the A/C pressure sensor 3P connector. 36P: 3P: No. 22 No. 3 36P: 3P: No. 4 No. 1 No. 6 No. 2 Is there continuity? YES - Go to step 9 . NO - Repair open in the wire(s) between the climate control unit and the A/C pressure sensor.
9. Reconnect climate control unit connectors A (36P) and B (20P).
10. Turn the ignition switch to ON (II).
11. Measure the voltage between climate control unit connector A (36P) terminal No. 22 and climate control unit connector B (20P) terminal No. 4 and No. 6 individually. Is there about 5 V? YES - Replace the A/C pressure sensor. • NO - Check for loose wires or poor connections at climate control unit connectors A (36P), B (20P) and at the A/C pressure sensor 3P 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 (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ).

Scheme 128

Scheme 129

Scheme 130

Scheme 131

Scheme 132

Scheme 133

Scheme 134

Scheme 135

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then ON (II).
3. Do the self-diagnostic with the HDS (see «HOW TO USE THE HDS TO CHECK FOR DTCS»(ref-333598-S11302038252009072100000) ) or climate control unit (see «HOW TO USE THE CLIMATE CONTROL UNIT SELF-DIAGNOSTIC FUNCTION WITHOUT THE HDS»(ref-333598-S09685808252009072100000) ).
4. Check for DTCs. Is DTC B2980 or B and WINDSHIELD DEFROST indicated? YES - Go to step 5 . NO - Intermittent failure.
5. Check for DTCs. Are these DTCs also present; B1234 or K and AUTO, and/or B1237 or N and AUTO, and/or B1245 or G, and/or B2968 or A and WINDSHIELD DEFROST? YES - Go to step 16 . NO - Go to step 6 .
6. Turn the ignition switch to LOCK (0).
7. Disconnect the A/C pressure sensor 3P connector.
8. Disconnect climate control unit connector B (20P).
9. Check for continuity between body ground and climate control unit connector B (20P) terminal No. 6. Is there continuity? YES - Repair short to body ground in the wire between the climate control unit and the A/C pressure sensor. • NO - Go to step 10 .
10. Check for continuity between climate control unit connector B (20P) terminals No. 4 and No. 6. Is there continuity? YES - Repair the short in the wires. • NO - Go to step 11 .
11. Turn the ignition switch to ON (II), and measure the voltage between body ground and climate control unit connector B (20P) terminal No. 6. Is there any voltage? YES - Repair short to power in the wire between the climate control unit and the A/C pressure sensor. This short may also damage the climate control unit. Repair the short to power before replacing the climate control unit. • NO - Go to step 12 .
12. Turn the ignition switch to LOCK (0).
13. Reconnect climate control unit connector B (20P).
14. Turn the ignition switch to ON (II).
15. Measure the voltage between climate control unit connector A (36P) terminal No. 22 and climate control unit connector B (20P) terminals No. 4 and No. 6 individually. Is there about 5 V? YES - Replace the A/C pressure sensor. • NO - Check for loose wires or poor connections at climate control unit connector B (20P) and at the A/C pressure sensor 3P 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 (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) )
16. Turn the ignition switch to LOCK (0), and disconnect climate control unit connector B (20P).
17. Disconnect these items: Driver's air mix control motor Passenger's air mix control motor Rear air mix control motor Humidity/in-car temperature sensor A/C pressure sensor
18. Check for continuity between climate control unit connector B (20P) terminal No. 4 and body ground. Is there continuity? YES - Repair short to body ground in the wire. • NO - Go to step 19 .
19. Turn the ignition switch to ON (II), and check the same terminal for voltage to body ground. Is there any voltage? YES - Repair short to power in the wire. This short may have also damaged the climate control unit. Repair the short to power before replacing the climate control unit. • NO - Go to step 20 .
20. Turn the ignition switch to LOCK (0).
21. Reconnect climate control unit connector B (20P)
22. Turn the ignition switch to ON (II), and measure the voltage between climate control unit connector B (20P) terminal No. 4 and body ground. Is there about 5 V? YES - Go to step 23 . NO - Check for a loose wire or poor connection at climate control unit connector B (20P). If the connection is good, substitute a known-good climate control unit and recheck. If the symptom/indication goes away, replace the original climate control unit (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ).
23. While checking the same terminal for voltage to ground, reconnect these items individually and note the voltage reading each time: Driver's air mix control motor Passenger's air mix control motor Rear air mix control motor Humidity/in-car temperature sensor A/C pressure sensor Does the voltage remain at about 5 V? YES - Substitute a known-good climate control unit and recheck. If the symptom/indication goes away, replace the original climate control unit (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ). • NO - Replace the component that caused the voltage drop.

Scheme 136

Scheme 137

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0) and then to ON (II)
3. Do the self-diagnostic with the HDS (see «HOW TO USE THE HDS TO CHECK FOR DTCS»(ref-333598-S11302038252009072100000) ) or climate control unit (see «HOW TO USE THE CLIMATE CONTROL UNIT SELF-DIAGNOSTIC FUNCTION WITHOUT THE HDS»(ref-333598-S09685808252009072100000) ).
4. Check the DTCs. Is DTC B2983 or D and WINDSHIELD DEFROST? YES - Go to step 5 . NO - Intermittent failure; check for loose wires or poor connections on the recirculation control motor circuit.
5. Turn the ignition switch to LOCK (0).
6. Test the recirculation control motor (see «RECIRCULATION CONTROL MOTOR TEST»(ref-333580-S37037944402009072100000) ). Is the recirculation control motor OK? YES - Go to step 7 . NO - Replace the recirculation control motor (see «RECIRCULATION CONTROL MOTOR REPLACEMENT»(ref-333580-S34716718752009072100000) ), or repair the recirculation control linkage or door.
7. Disconnect the recirculation control motor 7P connector.
8. Disconnect climate control unit connector A (36P).
9. Check for continuity between the following terminals of climate control unit connector A (36P) and the recirculation control motor 7P connector. 36P: 7P: No. 11: No. 1 ('09-10 models) or No. 2 ('11 model) No. 12: No. 2 ('09-10 models) or No. 1 ('11 model) Is there continuity? YES - Go to step 10 . NO - Repair open in the wire(s) between the climate control unit and the recirculation control motor.
10. Check for continuity between body ground and climate control unit connector A (36P) terminals No. 11 and No. 12 individually. Is there continuity? YES - Repair short to body ground in the wire(s) between the climate control unit and the recirculation control motor. • NO - Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ).

Scheme 138

Scheme 139

Scheme 140

Scheme 141

1. Check the No. 36 (10A) fuse in the under-dash fuse/relay box. Is the fuse OK? YES - Go to step 2 . NO - Replace the fuse, and recheck. If the fuse blows again, check for a short in the No. 36 (10A) fuse circuit.
2. Disconnect the rear mode control motor 7P connector.
3. Turn the ignition switch to ON (II).
4. Measure the voltage between rear mode control motor 7P connector terminal No. 1 and body ground. Is there battery voltage? YES - Go to step 5 . NO - Repair open in the wire between the No. 36 (10 A) fuse in the under-dash fuse/relay box and the rear mode control motor.
5. Turn the ignition switch to LOCK (0).
6. Test the rear mode control motor (see «REAR MODE CONTROL MOTOR TEST»(ref-333599-S23323057962009072100000) ). Is the rear mode control motor OK? YES - Go to step 7 . NO - Replace the rear mode control motor (see «REAR MODE CONTROL MOTOR REPLACEMENT»(ref-333599-S42317637422009072100000) ), or repair the rear mode control linkage or door.
7. Disconnect climate control unit connector A (36P).
8. Check for continuity between body ground and climate control unit connector A (36P) terminals No. 32 and No. 33 individually. Is there continuity? YES - Repair 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 to ON (II), and check the same terminals for voltage to body ground. Is there any voltage? YES - Repair 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 to LOCK (0).
11. Check for continuity between the following terminals of climate control unit connector A (36P) and the rear mode control motor 7P connector. 36: 7P: No. 32: No. 5 No. 33: No. 7 Is there continuity? YES - Check for loose wires or poor connections at climate control unit connector A (36P) and at the 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 (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ). • NO - Repair open in the wire(s) between the climate control unit and the rear mode control motor.

Scheme 142

Scheme 143

Scheme 144

1. Check the No. 36 (10A) fuse in the under-dash fuse/relay box. Is the fuse OK? YES - Go to step 2 . NO - Replace the fuse, and recheck. If the fuse blows again, check for a short in the No. 36 (10A) fuse circuit.
2. Turn the ignition switch to ON (II).
3. Measure the voltage between climate control unit connector A (36P) terminal No. 19 and body ground. Is there battery voltage? YES - Go to step 4 . NO - Repair open in the wire between the No. 36 (10 A) fuse in the under-dash fuse/relay box and the climate control unit.
4. Measure the voltage between climate control unit connector A (36P) terminal No. 4 and body ground. Is there less than 0.5 V? YES - Go to step 5 . 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 G403.
5. Turn the ignition switch to LOCK (0).
6. Disconnect climate control unit connector A (36P).
7. Check for continuity between the following terminals of the gauge control module 32P connector and climate control unit connector A (36P). 36P: 32P: No. 35: No. 20 No. 36: No. 19 Is there continuity? YES - Check for loose wires or poor connections at climate control unit connector A (36P). If the connections are good, substitute a known-good climate control unit, and recheck. • NO - Repair open in the wire between the Climate control unit and the gauge control module.

Scheme 145

Scheme 146

Scheme 147

Scheme 148

1. Operate the climate control system in several modes. Is the climate control system OK? YES - Go to step 2 . NO - Do the self-diagnostic function with the HDS (see «HOW TO USE THE HDS TO CHECK FOR DTCS»(ref-333598-S11302038252009072100000) ) or climate control unit, (see «HOW TO USE THE CLIMATE CONTROL UNIT SELF-DIAGNOSTIC FUNCTION WITHOUT THE HDS»(ref-333598-S09685808252009072100000) ).
2. Do the Navi system link, (see «SYSTEM DIAGNOSTIC MODE»(ref-333641-S42084363832009072100000) ) Is the A/C or TALK/BACK icon red? YES - A/C icon is red, go to step 3 . If other icon is red, check navigation system error code (DTCs) NO - Go to step 9
3. Turn the ignition switch to LOCK (0).
4. Disconnect navigation unit connector B (32P).
5. Disconnect climate control unit connector B (20P).
6. Check for continuity between the following terminals of climate control unit connector B (20P) and navigation unit connector B (32P). 20P: 32P: No. 2: No. 4 No. 9: No. 21 No. 10: No. 20 Is there continuity? YES - Go to step 7 . NO - Repair open in the wire(s) between the climate control unit and the navigation unit.
7. Check for continuity between body ground and the climate control unit connector B (20P) terminals No. 2, 9, and No. 10 individually. Is there continuity? YES - Repair short to body ground in the wire(s) between the climate control unit and the navigation unit. • NO - Go to step 8 .
8. Reconnect climate control unit connector B (20P).
9. Disconnect navigation unit connector B (32P).
10. Connect the navigation unit connector B (32P) terminals No. 4, 20, and No. 21 with jumper wires.
11. Turn the ignition switch to ON (II).
12. Press and hold the AUTO button, then press and hold the OFF button. Is the HEAT/VENT indicator solid with the remaining icons blinking? YES - Do the Unit check with the navigation system (see «UNIT CHECK (QUICK CHECK)»(ref-333641-S05191059642009072100000) ). • NO - Substitute a known-good climate control unit, and recheck. If the symptom goes away, replace the original climate control unit (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ).

Scheme 149

Scheme 150

Scheme 151

1. Turn the ignition switch to LOCK (0).
2. Disconnect climate control unit connector B (20P) and audio unit connector D (20P).
3. Check for continuity between the following terminals of climate control unit connector B (20P) and audio unit connector D (20P). 20P: 20P: No. 1: No. 7 No. 8: No. 6 Is there continuity? YES - Go to step 4 NO - Repair open in the wire between the climate control unit and the audio unit.
4. Check for continuity between body ground and climate control unit connector B (20P) terminals No. 1 and No. 8 individually. Is there continuity? YES - Repair short to body ground in the wire(s) between the climate control unit and the audio unit. • NO - Go to step 5 .
5. Reconnect climate control unit connector B (20P).
6. Connect audio unit connector D (20P) terminals No. 6 and No. 7 with a jumper wire.
7. Turn the ignition switch to ON (II).
8. Press and hold the DEF button and FAN ON/OFF button. Is the DEF button LED blinking? YES - Audio unit is faulty, replace the audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(ref-333639-S09667756202009072100000) ). • NO - Climate control unit is faulty, replace the climate control unit (see «CLIMATE CONTROL UNIT REMOVAL/INSTALLATION»(ref-333598-S31707617502009072100000) ).

Scheme 152

Scheme 153

Scheme 154

1. Turn the ignition switch to LOCK (0).
2. Disconnect climate control unit connector B (20P) and audio unit connector D (20P).
3. Check for continuity between the following terminals of climate control unit connector B (20P) and audio unit connector D (20P). 20P: 20P: No. 1: No. 11 No. 8: No. 12 Is there continuity? YES - Go to step 4 NO - Repair open in the wire between the climate control unit and the audio unit.
4. Check for continuity between body ground and climate control unit connector B (20P) terminals No. 1 and No. 8 individually. Is there continuity? YES - Repair short to body ground in the wire(s) between the climate control unit and the audio unit. • NO - Go to step 5 .
5. Reconnect climate control unit connector B (20P).
6. Connect audio unit connector D (20P) terminals No. 11 and No. 12 with a jumper wire.
7. Turn the ignition switch to ON (II).
8. Press and hold the DEF button and FAN ON/OFF button.

Is the DEF button LED blinking?

YES - Audio unit is faulty, replace the audio unit (see AUDIO UNIT REMOVAL/INSTALLATION ).

NO - Climate control unit is faulty, replace the climate control unit.