DESCRIPTION When the power
switch is on and the climate control switch (radio and display receiver
assembly) is operated, the air conditioning amplifier assembly receives
climate control switch position signals and then sends airflow amount
signals to each seat cushion climate control blower. WIRING DIAGRAM
 CAUTION / NOTICE / HINT
NOTICE:
- Inspect the fuses for circuits related to this system before performing the following procedure.
- If the auxiliary battery voltage becomes low, auxiliary battery load
control will operate in order to ensure sufficient power is supplied to
the power steering system. In this case, the climate control seat system
(for HV model) may not operate.
- The climate control seat system uses the LIN communication system.
Inspect the communication function by following How to Proceed with
Troubleshooting. Troubleshoot the climate control seat system after
confirming that the communication system is functioning properly.
Click here 
PROCEDURE
(a) Clear DTCs. Body Electrical > Air Conditioner > Clear DTCs (b) Check for DTCs. Body Electrical > Air Conditioner > Trouble Codes
|
Result | Proceed to | |
DTC B14B5 is not output |
A | | DTC B14B5 output |
B |
| B |
 | GO TO SEAT HEATER SYSTEM |
|
A |
 | |
| 2. |
CHECK CLIMATE CONTROL SEAT OPERATION | (a) Check the climate control seat operation.
Click here
|
Result | Proceed to | |
Climate control seat does not operate (for LH) |
A | | Climate control seat does not operate (for RH) |
B | | Both climate control seats do not operate |
C |
| B |
| GO TO STEP 12 |
| C |
| GO TO STEP 21 |
|
A | |
| |
| 3. |
PERFORM ACTIVE TEST USING TECHSTREAM | (a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Air Conditioner / Active Test.
(e) Perform the Active Test according to the display on the Techstream. Body Electrical > Air Conditioner > Active Test
|
Tester Display | Measurement Item |
Control Range | Diagnostic Note | |
Front Left Seat Blower |
Front LH seat blower operation |
OFF or ON | - | Body Electrical > Air Conditioner > Active Test
|
Tester Display | | Front Left Seat Blower |
OK: The seat blower operates normally.
|
Result | Proceed to | |
Only seatback climate control blower LH does not operate |
A | | Only seat cushion climate control blower LH does not operate |
B | | Both seat blowers do not operate |
C |
| B |
| REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER LH |
| C |
| GO TO STEP 7 |
|
A | |
| |
| 4. |
CHECK HARNESS AND CONNECTOR (SEAT CUSHION CLIMATE CONTROL BLOWER LH - SEATBACK CLIMATE CONTROL BLOWER LH) |
(a) Disconnect the a11 seatback climate control blower LH connector. (b) Disconnect the R34 seat cushion climate control blower LH connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
a11-1 (CTB) - R34-5 (CTB) |
Always | Below 1 Ω | |
a11-1 (CTB) or R34-5 (CTB) - Body ground |
Always | 10 kΩ or higher | |
a11-3 (BBS) - R34-6 (BBS) |
Always | Below 1 Ω | |
a11-3 (BBS) or R34-6 (BBS) - Body ground |
Always | 10 kΩ or higher | |
a11-4 (BFB-) - R34-4 (BFB-) |
Always | Below 1 Ω | |
a11-4 (BFB-) or R34-4 (BFB-) - Body ground |
Always | 10 kΩ or higher |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
OK | |
| |
| 5. |
REPLACE SEATBACK CLIMATE CONTROL BLOWER LH |
(a) Temporarily replace the seatback climate control blower LH with a new or known good one.
Click here
|
NEXT | |
| |
| 6. |
CHECK CLIMATE CONTROL SEAT OPERATION | (a) Check the climate control seat operation.
Click here OK: The climate control seat operates normally.
| OK |
| END (SEATBACK CLIMATE CONTROL BLOWER LH WAS DEFECTIVE) |
| NG |
| REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER LH |
| 7. |
CHECK HARNESS AND CONNECTOR (IG POWER SUPPLY - SEAT CUSHION CLIMATE CONTROL BLOWER LH - BODY GROUND) |
| (a) Disconnect the R34 seat cushion climate control blower LH connector. |
 |
|
*a | Front view of wire harness connector
(to Seat Cushion Climate Control Blower LH) | | |
(b) Measure the voltage and resistance according to the value(s) in the table below.
Standard Voltage: |
Tester Connection | Condition |
Specified Condition | |
R34-1 (IG) - Body ground |
Power switch on (IG) |
11 to 14 V | |
R34-1 (IG) - Body ground |
Power switch off | Below 1 V |
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
R34-8 (GND) - Body ground |
Always | Below 1 Ω |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
OK | |
| |
| 8. |
CHECK HARNESS AND CONNECTOR (SEAT CUSHION CLIMATE CONTROL BLOWER LH - AIR CONDITIONING AMPLIFIER ASSEMBLY) |
(a) Disconnect the G35 air conditioning amplifier assembly connector. (b) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
R34-7 (SIGN) - G35-24 (LOUT) |
Always | Below 1 Ω | |
R34-7 (SIGN) or G35-24 (LOUT) - Body ground |
Always | 10 kΩ or higher |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
OK | |
| |
| 9. |
CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY |
(a) Reconnect the G35 air conditioning amplifier assembly connector.
| (b) Reconnect the R34 seat cushion climate control blower LH connector. |
 |
|
*a | Component with harness connected
(Air Conditioning Amplifier Assembly) | | |
(c) Using an oscilloscope, check the input signal waveform. Measurement Condition |
Item | Content | |
Tester Connection | G35-24 (LOUT) - Body ground | |
Tool Setting | 1 V/DIV., 0.5 ms/DIV. | |
Vehicle Condition |
- Power switch on (IG)
- Climate control switch on
(blower position)
| OK: Waveform is similar to that shown in the illustration.
| OK |
| REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER LH |
|
NG | |
| |
| 10. |
REPLACE CLIMATE CONTROL SWITCH (RADIO AND DISPLAY RECEIVER ASSEMBLY) |
(a) Temporarily replace the climate control switch (radio and display receiver assembly) with a new or known good one.
Click here
|
NEXT | |
| |
| 11. |
CHECK CLIMATE CONTROL SEAT OPERATION | (a) Check the climate control seat operation.
Click here OK: The climate control seat operates normally.
| OK |
| END (CLIMATE CONTROL SWITCH (RADIO AND DISPLAY RECEIVER ASSEMBLY) WAS DEFECTIVE) |
| NG |
| REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY |
| 12. |
PERFORM ACTIVE TEST USING TECHSTREAM | (a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Air Conditioner / Active Test.
(e) Perform the Active Test according to the display on the Techstream. Body Electrical > Air Conditioner > Active Test
|
Tester Display | Measurement Item |
Control Range | Diagnostic Note | |
Front Right Seat Blower |
Front RH seat blower operation |
OFF or ON | - | Body Electrical > Air Conditioner > Active Test
|
Tester Display | | Front Right Seat Blower |
OK: The seat blower operates normally.
|
Result | Proceed to | |
Only seatback climate control blower RH does not operate |
A | | Only seat cushion climate control blower RH does not operate |
B | | Both seat blowers do not operate |
C |
| B |
| REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER RH |
| C |
| GO TO STEP 16 |
|
A | |
| |
| 13. |
CHECK HARNESS AND CONNECTOR (SEAT CUSHION CLIMATE CONTROL BLOWER RH - SEATBACK CLIMATE CONTROL BLOWER RH) |
(a) Disconnect the a5 seatback climate control blower RH connector. (b) Disconnect the R15 seat cushion climate control blower RH connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
R15-5 (CTB) - a5-1 (CTB) |
Always | Below 1 Ω | |
R15-5 (CTB) or a5-1 (CTB) - Body ground |
Always | 10 kΩ or higher | |
R15-6 (BBS) - a5-3 (BBS) |
Always | Below 1 Ω | |
R15-6 (BBS) or a5-3 (BBS) - Body ground |
Always | 10 kΩ or higher | |
a5-4 (BFB-) - R15-4 (BFB-) |
Always | Below 1 Ω | |
a5-4 (BFB-) or R15-4 (BFB-) - Body ground |
Always | 10 kΩ or higher |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
OK | |
| |
| 14. |
REPLACE SEATBACK CLIMATE CONTROL BLOWER RH |
(a) Temporarily replace the seatback climate control blower RH with a new or known good one.
Click here
|
NEXT | |
| |
| 15. |
CHECK CLIMATE CONTROL SEAT OPERATION | (a) Check the climate control seat operation.
Click here OK: The climate control seat operates normally.
| OK |
| END (SEATBACK CLIMATE CONTROL BLOWER RH WAS DEFECTIVE) |
| NG |
| REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER RH |
| 16. |
CHECK HARNESS AND CONNECTOR (IG POWER SUPPLY - SEAT CUSHION CLIMATE CONTROL BLOWER RH - BODY GROUND) |
| (a) Disconnect the R15 seat cushion climate control blower RH connector. |
 |
|
*a | Front view of wire harness connector
(to Seat Cushion Climate Control Blower RH) | | |
(b) Measure the voltage and resistance according to the value(s) in the table below.
Standard Voltage: |
Tester Connection | Condition |
Specified Condition | |
R15-1 (IG) - Body ground |
Power switch on (IG) |
11 to 14 V | |
R15-1 (IG) - Body ground |
Power switch off | Below 1 V |
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
R15-8 (GND) - Body ground |
Always | Below 1 Ω |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
OK | |
| |
| 17. |
CHECK HARNESS AND CONNECTOR (SEAT CUSHION CLIMATE CONTROL BLOWER RH - AIR CONDITIONING AMPLIFIER ASSEMBLY) |
(a) Disconnect the G35 air conditioning amplifier assembly connector. (b) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
R15-7 (SIGN) - G35-23 (ROUT) |
Always | Below 1 Ω | |
R15-7 (SIGN) or G35-23 (ROUT) - Body ground |
Always | 10 kΩ or higher |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
OK | |
| |
| 18. |
CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY |
(a) Reconnect the G35 air conditioning amplifier assembly connector.
| (b) Reconnect the R15 seat cushion climate control blower RH connector. |
 |
|
*a | Component with harness connected (Air Conditioning Amplifier Assembly) | | |
(c) Using an oscilloscope, check the input signal waveform. Measurement Condition |
Item | Content | |
Tester Connection | G35-23 (ROUT) - Body ground | |
Tool Setting | 1 V/DIV., 0.5 ms/DIV. | |
Vehicle Condition |
- Power switch on (IG)
- Climate control switch on
(blower position)
| OK: Waveform is similar to that shown in the illustration.
| OK |
| REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER RH |
|
NG | |
| |
| 19. |
REPLACE CLIMATE CONTROL SWITCH (RADIO AND DISPLAY RECEIVER ASSEMBLY) |
(a) Temporarily replace the climate control switch (radio and display receiver assembly) with a new or known good one.
Click here
|
NEXT | |
| |
| 20. |
CHECK CLIMATE CONTROL SEAT OPERATION | (a) Check the climate control seat operation.
Click here OK: The climate control seat operates normally.
| OK |
| END (CLIMATE CONTROL SWITCH (RADIO AND DISPLAY RECEIVER ASSEMBLY) WAS DEFECTIVE) |
| NG |
| REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY |
| 21. |
CHECK HARNESS AND CONNECTOR (IG POWER SUPPLY - CLIMATE CONTROL SWITCH (RADIO AND DISPLAY RECEIVER ASSEMBLY) - BODY GROUND) |
(a) Disconnect the G20 climate control switch (radio and display receiver assembly) connector.
(b) Measure the voltage and resistance according to the value(s) in the table below.
Standard Voltage: |
Tester Connection | Condition |
Specified Condition | |
G20-2 (IG+) - Body ground |
Power switch on (IG) |
11 to 14 V | |
G20-2 (IG+) - Body ground |
Power switch off | Below 1 V |
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
G20-6 (GND) - Body ground |
Always | Below 1 Ω |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
OK | |
| |
| 22. |
REPLACE CLIMATE CONTROL SWITCH (RADIO AND DISPLAY RECEIVER ASSEMBLY) |
(a) Temporarily replace the climate control switch (radio and display receiver assembly) with a new or known good one.
Click here
|
NEXT | |
| |
| 23. |
CHECK CLIMATE CONTROL SEAT OPERATION | (a) Check the climate control seat operation.
Click here OK: The climate control seat operates normally.
| OK |
| END (CLIMATE CONTROL SWITCH (RADIO AND DISPLAY RECEIVER ASSEMBLY) WAS DEFECTIVE) |
| NG |
| REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY | | 
