When the combination switch is turned to ECO position, the air conditioning amplifier assembly controls the air conditioning system to enhance fuel efficiency.
When the auxiliary battery is disconnected or the air conditioning amplifier assembly is replaced, be sure to perform servo motor initialization Click here.
Before disconnecting the cable form the negative (-) battery terminal or replacing the air conditioning amplifier assembly, record the last operation state of the air conditioning for each transmitter. After replacement, it is necessary to perform memory registration for each transmitter Click here.
READ VALUE USING GTS (ECO SWITCH)
Connect the GTS to the DLC3.
Turn the power switch on (IG).
Turn the GTS on.
Enter the following menus: Body Electrical / Air Conditioner / Data List Click here.
Check the values by referring to the table below.
|Tester Display||Measurement Item/Range||Control Range||Diagnostic Note|
Combination switch assembly /
OFF or ON
ON: Combination switch assembly being turned and held at ECO position
OFF: Combination switch assembly not turned
|The combination switch assembly condition displayed on the GTS changes with the actual switch operation.|
CHECK HARNESS AND CONNECTOR (COMBINATION SWITCH ASSEMBLY - AIR CONDITIONING AMPLIFIER ASSEMBLY AND BODY GROUND) Click here
CHECK HARNESS AND CONNECTOR (COMBINATION SWITCH ASSEMBLY - AIR CONDITIONING AMPLIFIER ASSEMBLY AND BODY GROUND)
Disconnect the N59 combination switch assembly connector.
Disconnect the N78 air conditioning amplifier assembly connector.
Measure the resistance according to the value(s) in the table below.
REPAIR OR REPLACE HARNESS OR CONNECTOR
CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY
Front view of wire harness connector
(to Combination Switch Assembly)
Reconnect the N78 air conditioning amplifier assembly connector.
Measure the voltage according to the value(s) in the table below.
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here
INSPECT COMBINATION SWITCH ASSEMBLY
Remove the combination switch assembly Click here.
Inspect the combination switch assembly Click here.
REPLACE COMBINATION SWITCH ASSEMBLY Click here