DESCRIPTION
When the combination switch assembly (ECO mode switch) is turned on, the air conditioning amplifier assembly receives a combination switch assembly (ECO mode switch) ON signal and controls the air conditioning to enhance fuel efficiency.
WIRING DIAGRAM
PROCEDURE
1. | READ VALUE USING TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Air Conditioner / Data List.
(e) Read the Data List according to the display on the Techstream.
Body Electrical > Air Conditioner > Data List Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
---|---|---|---|---|
ECO Switch | Combination switch assembly (ECO mode switch) | OFF or ON | ON: Combination switch assembly (ECO mode switch) being turned and held at ECO position OFF: Combination switch assembly (ECO mode switch) not turned | - |
Tester Display |
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ECO Switch |
OK:
Combination switch assembly (ECO mode switch) condition displayed on the Techstream changes with the actual switch operation.
OK | ![]() | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
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2. | INSPECT COMBINATION SWITCH ASSEMBLY (ECO MODE SWITCH) |
(a) Remove the combination switch assembly (ECO mode switch).
Click here
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
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NG | ![]() | REPLACE COMBINATION SWITCH ASSEMBLY (ECO MODE SWITCH) |
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3. | CHECK HARNESS AND CONNECTOR (COMBINATION SWITCH ASSEMBLY (ECO MODE SWITCH) - AIR CONDITIONING AMPLIFIER ASSEMBLY) |
(a) Disconnect the J42 air conditioning amplifier assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
J42-20 (ECOS) - J35-9 (ECU) | Always | Below 1 Ω |
J42-20 (ECOS) or J35-9 (ECU) - Body ground | Always | 10 kΩ or higher |
NG | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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4. | CHECK HARNESS AND CONNECTOR (COMBINATION SWITCH ASSEMBLY (ECO MODE SWITCH) - BODY GROUND) |
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
J35-1 (GND) - Body ground | Always | Below 1 Ω |
OK | ![]() | REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY |
NG | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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CAUTION / NOTICE / HINT HINT:
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*: Use the Techstream.
PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
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