Pinout Values and Diagnostic Parameters

AIR CONDITIONING: AIR CONDITIONING SYSTEM: TERMINALS OF ECU

1. CHECK AIR CONDITIONING AMPLIFIER

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

HINT
Check from the rear of the connector while it is connected to the air conditioning amplifier.

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

(b) Using an oscilloscope, check waveform 1.

Compressor and pulley operation signal

Blower motor control signal

HINT
When the blower level is increased, the duty ratio changes accordingly.

(d) Using an oscilloscope, check waveform 3.

CAN communication signal

HINT
The waveform varies depending on the CAN communication signal.

(e) Using an oscilloscope, check waveform 4.

CAN communication signal

HINT
The waveform varies depending on the CAN communication signal.

(f) Using an oscilloscope, check waveform 5.

Rear blower motor control signal

HINT
When the rear blower level is increased, the duty ratio changes accordingly.

2. CHECK FRONT LIGHT ECU (FRONT CONTROLLER)

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

HINT
Check from the rear of the connector while it is connected to the front light ECU (Front controller).

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

3. CHECK MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK)

(a) Disconnect the DA, L12 and L13 ECU connectors.

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

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

4. CHECK LUGGAGE ROOM JUNCTION BLOCK (REAR JUNCTION BLOCK ECU)

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

HINT
Check from the rear of the connector while it is connected to the rear junction block ECU.

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

5. CHECK REAR DOOR ECU LH

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

HINT
Check from the rear of the connector while it is connected to the rear door ECU LH.

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

6. CHECK REAR DOOR ECU RH

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

HINT
Check from the rear of the connector while it is connected to the rear door ECU RH.

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

7. CHECK DISPLAY AND NAVIGATION MODULE DISPLAY

(a) Disconnect the L59 display connector.

(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.

8. CHECK INTEGRATION CONTROL AND PANEL (w/o Display and Navigation Module Display)

(a) Disconnect the L35 integration control and panel connector.

(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.

9. CHECK REAR POWER SEAT MODULE (except for 4-Passenger with Ottoman)

(a) Disconnect the r2 rear power seat module connector.

(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.

10. CHECK REAR POWER SEAT MODULE (for 4-Passenger with Ottoman)

(a) Disconnect the S15 rear power seat module connector.

(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.

11. CHECK ELECTRIC POWER CONTROL ECU

(a) Disconnect the PA and A69 electric power control ECU connectors.

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

(c) Reconnect the PA and A69 electric power control ECU connectors.

(d) Measure the voltage 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.