Climate Control Seat System

SEAT: CLIMATE CONTROL SEAT SYSTEM: TERMINALS OF ECU

1. CHECK FRONT CLIMATE CONTROL ECU LH





(a) Disconnect the e34 and e35 ECU connectors.

(b) Measure the voltage and resistance according to the value(s) in the table below.





If the result is not as specified, there may be a malfunction on the wire harness side.

(c) Reconnect the e34 and e35 ECU connectors.

(d) Measure the voltage and resistance according to the value(s) in the table below.





* If the result is not as specified, the ECU may have a malfunction.

(e) Using an oscilloscope, check waveform.









2. CHECK FRONT CLIMATE CONTROL ECU RH





(a) Disconnect the e3 and e4 ECU connectors.

(b) Measure the voltage and resistance according to the value(s) in the table below.





If the result is not as specified, there may be a malfunction on the wire harness side.

(c) Reconnect the e3 and e4 ECU connectors.

(d) Measure the voltage and resistance according to the value(s) in the table below.





* If the result is not as specified, the ECU may have a malfunction.

(e) Using an oscilloscope, check waveform.









3. CHECK REAR SEAT CLIMATE CONTROL ECU RH





(a) Disconnect the f7 and f8 ECU connectors.

(b) Measure the voltage and resistance according to the value(s) in the table below.





If the result is not as specified, there may be a malfunction on the wire harness side.

(c) Reconnect the f7 and f8 ECU connectors.

(d) Measure the voltage and resistance according to the value(s) in the table below.





* If the result is not as specified, the ECU may have a malfunction.

(e) Using an oscilloscope, check waveform.









4. CHECK REAR SEAT CLIMATE CONTROL ECU LH





(a) Disconnect the f27 and f28 ECU connectors.

(b) Measure the voltage and resistance according to the value(s) in the table below.





If the result is not as specified, there may be a malfunction on the wire harness side.

(c) Reconnect the f27 and f28 ECU connectors.

(d) Measure the voltage and resistance according to the value(s) in the table below.





* If the result is not as specified, the ECU may have a malfunction.

(e) Using an oscilloscope, check waveform.