Lexus ES: Drive Mode Select Switch Circuit
DESCRIPTION
The characteristics of the electronic throttle and EPS operation change according to operation of the drive mode select switch (combination switch assembly).
WIRING DIAGRAM
PROCEDURE
| 1. | CHECK THE PROBLEM SYMPTOMS |
(a) Check each symptom by checking the suspected areas in the table below.
| Result | Proceed to |
|---|---|
| SPORT mode or NORMAL mode is abnormal. | A |
| ECO mode is abnormal. | B |
| B | .gif) | GO TO AIR CONDITIONING SYSTEM |
|
.gif)
| 2. | CHECK CAN COMMUNICATION SYSTEM |
(a) Check for DTCs.
Click here .gif)
| Result | Proceed to |
|---|---|
| CAN communication system DTCs are not output. | A |
| CAN communication system DTCs are output. | B |
| B | | GO TO CAN COMMUNICATION SYSTEM |
|
| 3. | CHECK HARNESS AND CONNECTOR (DRIVE MODE SELECT SWITCH (COMBINATION SWITCH ASSEMBLY) - BODY GROUND) |
(a) Turn the engine switch off.
| (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:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| H12-7 (GND) - Body ground | Always | Below 1 Ω |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 4. | INSPECT DRIVE MODE SELECT SWITCH (COMBINATION SWITCH ASSEMBLY) |
(a) Inspect drive mode select switch (combination switch assembly).
Click here
OK:
Drive mode select switch (Combination switch assembly) is normal.
| Result | Proceed to |
|---|---|
| CAN communication system DTCs are not output. | A |
| CAN communication system DTCs are output. | B |
| B | | REPLACE COMBINATION SWITCH ASSEMBLY |
|
| 5. | CHECK HARNESS AND CONNECTOR (DRIVE MODE SELECT SWITCH (COMBINATION SWITCH ASSEMBLY) - ECM) |
(a) Connect the H12 drive mode select switch (combination switch assembly) connector.
| (b) Disconnect the A25 ECM connectors. |
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
w/ Adaptive Variable Suspension System| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A25-55 (PWMS) - Body ground | SPORT S/S+ mode switch being turned and held | Below 1 Ω |
| A25-55 (PWMS) - Body ground | SPORT S/S+ mode switch not turned | 10 kΩ or higher |
| A25-40 (SPCN) - Body ground | NORMAL/CUSTOM mode switch being pushed and held | Below 1 Ω |
| A25-40 (SPCN) - Body ground | NORMAL/CUSTOM mode switch not pushed | 10 kΩ or higher |
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A25-55 (PWMS) - Body ground | SPORT mode switch being turned and held | Below 1 Ω |
| A25-55 (PWMS) - Body ground | SPORT mode switch not turned | 10 kΩ or higher |
| A25-40 (SPCN) - Body ground | NORMAL mode switch being pushed and held | Below 1 Ω |
| A25-40 (SPCN) - Body ground | NORMAL mode switch not pushed | 10 kΩ or higher |
| OK | | REPLACE ECM |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
READ NEXT:
Drive Mode Select Switch Circuit
DESCRIPTION The characteristics of the electronic throttle and EPS operation change according to operation of the drive mode select switch (combination switch assembly). WIRING DIAGRAM PROCEDURE 1
Check Assist Limit Record
CAUTION / NOTICE / HINT HINT: Perform this troubleshooting procedure when no DTCs are output, including DTCs related to CAN communication system malfunctions. PROCEDURE 1. READ VALUE USING GTS (
SEE MORE:
Installation
INSTALLATION CAUTION / NOTICE / HINT HINT:
Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.
PROCEDURE 1. INSTALL WASHER NOZZLE SUB-ASSEMBLY (a) Connect a new washer nozzle sub-assembly to the washer hose. (b) Engage the 2 claws as indicated by t
Rear Height Control Sensor (B241A)
DESCRIPTION The headlight ECU sub-assembly LH determines the vehicle height and performs automatic headlight beam level control based on signals from the rear height control sensor sub-assembly LH via direct line. DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from
