Lexus NX: Pattern Select Switch Eco Mode Circuit
DESCRIPTION
When selecting ECO mode, the mode switch (integration control & panel assembly) operation signal is sent to the air conditioning amplifier assembly. Following this, ECO mode control is activated for the heater and air conditioning system.
WIRING DIAGRAM
PROCEDURE
| 1. | READ VALUE USING TECHSTREAM (CAN BUS CHECK) |
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| Result | Proceed to |
|---|---|
| All of the ECUs and sensors that are currently connected to the CAN communication system are displayed. | A |
| None of the ECUs and sensors that are currently connected to the CAN communication system are displayed, or some of them are not displayed. | B |
| B | .gif) | GO TO CAN COMMUNICATION SYSTEM |
|
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| 2. | CHECK DTC OUTPUT (HEALTH CHECK) |
Click here
| DTCs are output. | | GO TO DTC CHART |
|
| 3. | READ VALUE USING TECHSTREAM (ECO MODE) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Powertrain / Hybrid Control / Data List / ECO Mode.
Powertrain > Hybrid Control > Data List| Tester Display |
|---|
| ECO Mode |
(d) Read the value displayed on the Techstream.
Powertrain > Hybrid Control > Data List| Tester Display | Measurement Item | Range | Normal Condition |
|---|---|---|---|
| ECO Mode | ECO mode transition availability | ON or OFF | In ECO mode: ON |
| Result | Proceed to |
|---|---|
| The Techstream display changes according to the integration control & panel assembly operation. | A |
| The Techstream display does not change according to the integration control & panel assembly operation. | B |
| A | | CHECK FOR INTERMITTENT PROBLEMS |
|
| 4. | READ VALUE USING TECHSTREAM (ECO SWITCH) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Body Electrical / Air Conditioning / Data List / ECO Switch.
Body Electrical > Air Conditioner > Data List| Tester Display |
|---|
| ECO Switch |
(d) Read the value displayed on the Techstream.
Body Electrical > Air Conditioner > Data List| Tester Display | Measurement Item | Range | Normal Condition |
|---|---|---|---|
| ECO Switch | Integration control & panel assembly condition | ON or OFF | Integration control & panel assembly being turned and held at ECO position: ON Integration control & panel assembly not turned: OFF |
| Result | Proceed to |
|---|---|
| The Techstream display changes according to the integration control & panel assembly operation. | A |
| The Techstream display does not change according to the integration control & panel assembly operation. | B |
| A | | REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY |
|
| 5. | INSPECT INTEGRATION CONTROL & PANEL ASSEMBLY |
(a) Remove the integration control & panel assembly.
Click here
| (b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
(c) Install the integration control & panel assembly.
| NG | | REPLACE INTEGRATION CONTROL & PANEL ASSEMBLY |
|
| 6. | CHECK HARNESS AND CONNECTOR (INTEGRATION CONTROL & PANEL ASSEMBLY - BODY GROUND) |
Click here
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 7. | CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - INTEGRATION CONTROL & PANEL ASSEMBLY) |
(a) Disconnect the I50 air conditioning amplifier assembly connector.
Click here
(b) Disconnect the I66 integration control & panel assembly connector.
| (c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
(d) Reconnect the I66 integration control & panel assembly connector.
(e) Reconnect the I50 air conditioning amplifier assembly connector.
| OK | | REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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