Pattern Select Switch Eco Mode Circuit [08/2013 - ]: Procedure

WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.

READ VALUE USING TECHSTREAM (CAN BUS CHECK) See step 2
B → See step 10

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

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 integration control and panel assembly operation.	A
The Techstream display does not change according to the integration control and panel assembly operation.	B

B → See step 4

A → See step 9

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	Integration control and panel assembly condition/ ON or OFF	Mode switch being turned and held at ECO position: ON Mode switch not turned: OFF

Result

Result	Proceed to
The Techstream display changes according to the integration control and panel assembly operation.	A
The Techstream display does not change according to the integration control and panel assembly operation.	B

B → See step 5

A → See step 11

INSPECT INTEGRATION CONTROL AND PANEL ASSEMBLY (MODE SWITCH)

Remove the integration control and panel assembly. Refer to COMPONENTS [08/2013 - ] .

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard Resistance

Tester Connection	Condition	Specified Condition
4 - 5	Mode switch being turned and held at ECO position	Below 1 Ω
4 - 5	Mode switch not turned	10 kΩ or higher
2 - 5	Mode switch being pushed and held	Below 1 Ω
2 - 5	Mode switch not pushed	10 kΩ or higher

TEXT IN ILLUSTRATION

*a	Component without harness connected (Integration Control and Panel Assembly)

Install the integration control and panel assembly.

NG → See step 8

OK: Go to next step

CHECK HARNESS AND CONNECTOR (INTEGRATION CONTROL AND PANEL ASSEMBLY - BODY GROUND) See step 7
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - INTEGRATION CONTROL AND PANEL ASSEMBLY)

Disconnect the H54 air conditioning amplifier assembly connector.
Disconnect the H71 integration control and panel assembly connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
H54-4 (ECOS) - H71-4 (ECU)	Always	Below 1 Ω
H54-4 (ECOS) or H71-4 (ECU) - Body ground	Always	10 kΩ or higher

TEXT IN ILLUSTRATION

*a	Front view of wire harness connector (to Air Conditioning Amplifier Assembly)
*b	Rear view of wire harness connector (to Integration Control and Panel Assembly)

Reconnect the H71 integration control and panel assembly connector.
Reconnect the H54 air conditioning amplifier assembly connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK → See step 11

REPLACE INTEGRATION CONTROL AND PANEL ASSEMBLY. Refer to COMPONENTS [08/2013 - ]
CHECK FOR INTERMITTENT PROBLEMS. Refer to CHECK FOR INTERMITTENT PROBLEMS [08/2013 - ]
GO TO CAN COMMUNICATION SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ]
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to COMPONENTS [08/2013 - ]