Lexus ES: Pattern Select Switch Eco Mode Circuit
DESCRIPTION
When selecting Eco drive mode, the drive mode select switch (combination switch assembly) (Eco drive mode) operation signal is sent to the air conditioning amplifier assembly. Following this, Eco drive mode control is activated for the heater and air conditioning system and the hybrid vehicle control system.
WIRING DIAGRAM
PROCEDURE
| 1. | READ VALUE USING TECHSTREAM (CAN BUS CHECK) |
Click here .gif)
| 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
| Result | Proceed to |
|---|---|
| No DTCs are output | A |
| DTCs are output | B |
| B | | GO TO DTC CHART |
|
| 3. | 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 Conditioner / Data List / ECO Switch.
Body Electrical > Air Conditioner > Data List| Tester Display |
|---|
| ECO Switch |
(d) Read the value displayed on the Techstream.
| Result | Proceed to |
|---|---|
| The Techstream display changes according to the drive mode select switch (combination switch assembly) operation | A |
| The Techstream display does not change according to the drive mode select switch (combination switch assembly) operation | B |
| A | | CHECK FOR INTERMITTENT PROBLEMS |
|
| 4. | INSPECT DRIVE MODE SELECT SWITCH (COMBINATION SWITCH ASSEMBLY) (ECO DRIVE MODE) |
Click here
| NG | | REPLACE DRIVE MODE SELECT SWITCH (COMBINATION SWITCH ASSEMBLY) |
|
| 5. | CHECK HARNESS AND CONNECTOR (DRIVE MODE SELECT SWITCH (COMBINATION SWITCH ASSEMBLY) - BODY GROUND) |
(a) Disconnect the H12 drive mode select switch (combination switch assembly) connector.
| (b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
(c) Reconnect the H12 drive mode select switch (combination switch assembly) connector.
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 6. | CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - DRIVE MODE SELECT SWITCH (COMBINATION SWITCH ASSEMBLY)) |
(a) Disconnect the G40 air conditioning amplifier assembly connector.
(b) Disconnect the H12 drive mode select switch (combination switch assembly) connector.
| (c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
(d) Reconnect the H12 drive mode select switch (combination switch assembly) connector.
(e) Reconnect the G40 air conditioning amplifier assembly connector.
| OK | | REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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