Pattern Select Switch Eco Mode Circuit [08/2015 - ]: Procedure

READ VALUE USING TECHSTREAM (CAN BUS CHECK) Refer to 2
B → Refer to 11

A: Go to next step
CHECK DTC OUTPUT (HEALTH CHECK) Refer to 3
B → GO TO DTC CHART

A: Go to next step

PERFORM ACTIVE TEST USING TECHSTREAM (INDICAT. ECO MODE)

Connect the Techstream to the DLC3.
Turn the power switch on (IG).
Enter the following menus: Body Electrical / Combination Meter / Active Test / Indicat. ECO Mode.

Perform the "Indicat. ECO MODE" Active Test.

The ECO MODE indicator lamp comes on or blinks.

Result

Result	Proceed to
OK	A
NG (w/o Multi-information Display)	B
NG (w/ Multi-information Display)	C

Turn the power switch off.

B → Refer to 12

C → Refer to 14

A: Go to next step

READ VALUE USING TECHSTREAM (ECO MODE)

Connect the Techstream to the DLC3.
Turn the power switch on (IG).
Enter the following menus: Powertrain / Hybrid Control / Data List / ECO Mode.

Read the value displayed on the Techstream.

Tester Display	Measurement Item/Range	Normal Condition
ECO Mode	ECO mode transition availability/ ON or OFF	In ECO mode: ON

Result

Result	Proceed to
The Techstream display changes according to the ECO switch operation.	A
The Techstream display does not changes according to the ECO switch operation.	B

B → Refer to 5

A → Refer to 10

READ VALUE USING TECHSTREAM (ECO SWITCH)

Connect the Techstream to the DLC3.
Turn the power switch on (IG).
Enter the following menus: Body Electrical / Air Conditioning / Data List / ECO Switch.

Read the value displayed on the Techstream.

Tester Display	Measurement Item/Range	Normal Condition
ECO Switch	ECO switch condition/ ON or OFF	ECO switch being pushed and held: ON ECO switch not pushed: OFF

Result

Result	Proceed to
The Techstream display changes according to the ECO switch operation.	A
The Techstream display does not changes according to the ECO switch operation.	B

B → Refer to 6

A → Refer to 13

CHECK COMBINATION SWITCH ASSEMBLY (ECO SWITCH)

Remove the combination switch assembly.

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard Resistance

Tester Connection	Switch Condition	Specified Condition
L155-5 (ECU) - L155-3 (E)	ECO switch being pushed and held	Below 1 Ω
L155-5 (ECU) - L155-3 (E)	ECO switch not pushed	10 kΩ or higher

TEXT IN ILLUSTRATION

*a	Component without harness connected (Combination Switch Assembly)

Install the combination switch assembly.

NG → Refer to 9

OK: Go to next step

CHECK HARNESS AND CONNECTOR (COMBINATION SWITCH ASSEMBLY - BODY GROUND) Refer to 7
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - COMBINATION SWITCH)

Disconnect connector L17 from the air conditioning amplifier assembly.
Disconnect connector L155 from the combination switch assembly.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
L17-15 (ECOS) - L155-5 (ECU)	Always	Below 1 Ω
L17-15 (ECOS) or L155-5 (ECU) - Body ground	Always	10 kΩ or higher

TEXT IN ILLUSTRATION

*a	Front view of wire harness connector (to Air Conditioning Amplifier Assembly)
*b	Front view of wire harness connector (to Combination Switch Assembly)

Connect the combination switch assembly connector.
Connect the air conditioning amplifier assembly connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK → Refer to 13

REPLACE COMBINATION SWITCH ASSEMBLY. Refer to COMPONENTS [08/2015 - ]
CHECK FOR INTERMITTENT PROBLEMS. Refer to CHECK FOR INTERMITTENT PROBLEMS [08/2015 - ]
GO TO CAN COMMUNICATION SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - ]
REPLACE METER CIRCUIT PLATE. Refer to COMPONENTS [08/2015 - ]
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to COMPONENTS [08/2015 - ]
REPLACE COMBINATION METER SUB-ASSEMBLY. Refer to COMPONENTS [08/2015 - ]