Drive Mode Select Switch Circuit [11/2023 - ]: Procedure

WARNING: This page is about a different car, the 2025 Toyota Highlander and 2024 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.

READ VALUE USING GTS (CAN BUS CHECK)

See step 2

Result

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

Result:

GO TO CAN COMMUNICATION SYSTEM

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - ]

Result:

See step 2

CHECK DTC OUTPUT (HEALTH CHECK)

See step 3

Result

Result	Proceed to
No DTCs are output	A
DTCs are output	B

Result:

GO TO DTC CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART [11/2023 - ]

Result:

See step 3

CHECK DRIVE MODE STATUS

Turn the ignition switch to ON.
Operate the drive mode select switch (No. 1 pattern select switch assembly) to change the drive mode.

Check that the drive mode indicator is displayed on the multi-information display and changes according to the selected drive mode.

Result

Result	Proceed to
Display changes according to drive mode select switch operation	A
Display does not change according to drive mode select switch operation	B

Turn the ignition switch off.

Result:

GO TO PROBLEM SYMPTOMS TABLE

Refer to PROBLEM SYMPTOMS TABLE [11/2023 - ]

Result:

See step 4

READ VALUE USING GTS (DRIVE MODE SWITCH-, DRIVE MODE SWITCH+)

Read the Data List using the GTS.

Powertrain > Hybrid Control > Data List

Tester Display
Drive Mode Switch-
Drive Mode Switch+

Result

Result	Proceed to
GTS display changes according to drive mode select switch operation	A
Other than above	B

Turn the ignition switch off.

Result:

CHECK METER / GAUGE SYSTEM

for 12.3 Inch Display: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - ]

except 12.3 Inch Display: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ]

Result:

See step 5

INSPECT DRIVE MODE SELECT SWITCH (NO. 1 PATTERN SELECT SWITCH ASSEMBLY)
Refer to INSPECTION [12/2019 - ]

Result

Proceed to

OK

NG

Result:

NG

REPLACE DRIVE MODE SELECT SWITCH (NO. 1 PATTERN SELECT SWITCH ASSEMBLY)

Refer to REMOVAL [12/2019 - ]

Result:

OK

See step 6

CHECK HARNESS AND CONNECTOR (DRIVE MODE SELECT SWITCH - BODY GROUND)

Disconnect the P3 drive mode select switch (No. 1 pattern select switch assembly) connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
P3-5 (E) - Body ground	Always	Below 1 Ω

Reconnect the P3 drive mode select switch (No. 1 pattern select switch assembly) connector.

Result

Proceed to
OK
NG

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result:

See step 7

CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - DRIVE MODE SELECT SWITCH)

Disconnect the H67 hybrid vehicle control ECU connector.
Disconnect the P3 drive mode select switch (No. 1 pattern select switch assembly) connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
H67-37 (DMS-) - P3-6 (E)	Always	Below 1 Ω
H67-38 (DMS+) - P3-7 (SEL)	Always	Below 1 Ω
H67-37 (DMS-) or P3-6 (E) - Body ground	Always	10 kΩ or higher
H67-38 (DMS+) or P3-7 (SEL) - Body ground	Always	10 kΩ or higher

Reconnect the P3 drive mode select switch (No. 1 pattern select switch assembly) connector.

Reconnect the H67 hybrid vehicle control ECU connector.

Result

Proceed to
OK
NG

Result:

REPLACE HYBRID VEHICLE CONTROL ECU

Refer to REMOVAL [11/2023 - ]

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR