Without Scan Tool
General Troubleshooting InformationRetrieving a DTCs (without HDS)
The climate control unit has a self-diagnostic function. To run the self-diagnostic function, do the following:
NOTE: Before troubleshooting the climate control system, refer to B-CAN System Diagnosis Test Mode A Troubleshooting, and the communication circuit self-diagnostic function test.
1. Turn the ignition switch ON (II).
2. Press and hold the OFF button. While holding the OFF button, press the rear window defogger button five times within 10 seconds. Release the OFF button. All the LEDs and LCD segments should blink three times, then the self-diagnostic begins. Wait for about one minute for the self-diagnostic to complete.
NOTE: The blower motor can be run at any speed regardless of what the panel is displaying.
If there is any problem in the system, the temperature indicator will light the AUTO indicator and the segment (A through N) corresponding to the error. The temperature indicator will then alternate every second between displaying "88" (all segments lit) and the error code segment (A through N) and AUTO indicator. To determine the meaning of the DTC, refer to the DTC Troubleshooting Index.
If there are no problems detected, the segments will not illuminate, and the system will appear to be turned off.
3. Turn the ignition switch OFF to cancel the self-diagnostic function. After completing repair work, run the self-diagnostic function again to make sure that there are no other malfunctions.
Checking DTCs by DTC Indicator
NOTE: Before troubleshooting the climate control system, refer to B-CAN System Diagnosis Test Mode A Troubleshooting.
To retrieve the DTC, you must run the self-diagnostic function. In the case of multiple problems, the respective indicator segments will come on. If indicator segments A, C, D, E, F, G, I, L, N and AUTO indicator come on at the same time, there may be an open in the common ground wire.
Communication Circuit Self-diagnostic Function Test (with Rear Climate Control)
The climate control unit has a communication circuit self-diagnostic function Perform the following steps to test the communication circuit
1. Turn the ignition switch OFF, and then ON (II)
2. At the climate control panel, press and hold the OFF button While holding the OFF button, press the rear window defogger button five times within 10 seconds Release the OFF button All the LEDs and LCD segments should blink three times.
- If none of the LEDs or LCD segments blink, go to climate control panel power and ground circuit troubleshooting.
- If one or more LEDs or LCD segments do not blink, but at least one LED or LCD segment does blink, replace the climate control panel.
- If all LEDs and LCD segments blink, go to step 3.
3. Turn the ignition switch OFF, and then ON (II)
4. At the rear climate control panel press and hold the OFF button While holding the OFF button, press the rear V button five times within 10 seconds Release the OFF button All the LCD segments should blink three times
- If none of the LCD segments blink, go to rear climate control panel power and ground circuit troubleshooting.
- If one or more LCD segments do not blink, but at least one LCD segment does blink, replace the rear climate control panel.
- If all LCD segments blink, go to step 5.
5. Turn the ignition switch OFF, and then ON (II)
6. At the climate control panel, press and hold the fan A button and then the OFF button While holding both buttons, the fan indicator will light the segment A. If there is any problem in the system, the fan indicator will light corresponding segment (B through E) Record any segments that light and go to step 7.
7. Turn the ignition switch OFF, and then ON (II).
8. At the rear climate control panel, press and hold the rear fan A button and then the OFF button While holding both buttons, the fan indicator will light the segment A If there is any problem in the system, the fan indicator will light the corresponding segment (B through E)
- If no segment other than segment A light in either the climate control panel or the rear climate control panel communication circuit is OK
- If any segment other than segment A light, record the segments and then go to step 9
9. Refer to the given chart and perform the appropriate diagnosis for the error indicated by the front and rear fan segments.
Communication circuit self-diagnostic function (without rear climate control)
The climate control unit has a communication circuit self diagnostic function Perform the following steps to test the communication circuit
1. Turn the ignition switch OFF, and then ON (II).
2. At the climate control panel, press and hold the OFF button While holding the OFF button, press the rear window defogger button five times within 10 seconds Release the OFF button All the LEDs and LCD segments should blink three times
- If none of the LEDs or LCD segments blink, go to climate control panel power and ground circuit troubleshooting.
- If one or more LEDs or LCD segments do not blink, but at least one LED or LCD segment does blink, replace the climate control panel.
- If all LEDs and LCD segments blink, go to step 3.
3. Turn the ignition switch OFF, and then ON (II)
4 .At the rear climate control panel, press and hold the fan A. button and then OFF button While holding both buttons, the fan indicator will light the segment A If there is any problem in the system, the fan indicator will light the corresponding segment (B through E) Record any segments that light and go to step 5
5. Turn the ignition switch OFF, and then ON (II)
6. At the rear climate control panel, set the rear fan control dial OFF The rear temperature control dial to Max Cool, and the rear control dial to select Vent
7. Turn the ignition switch ON (II) and then press the rear control button five times within 10 seconds The rear control indicator will turn off, and then the communication circuit self-diagnostic function will start The rear control indicator will blink to indicate any problems
- If no segment other than segment A light in the climate control panel and the rear climate control indicator does not blink, the communication circuit is OK
- If any segment other than segment A light, and/or the rear control indicator blinks, record the segments and/or blinks, and then go to step 8.
8. Refer to the given chart and perform the appropriate diagnosis for the error indicated by the front fan segments and rear control indicator.