DESCRIPTION When the ignition switch is turned ON, positive (+) battery voltage is applied to the air conditioning amplifier. WIRING DIAGRAM ![]() PROCEDURE
(a) Remove the ECU-IG1 NO.3 fuse from the driver side junction block. (b) Measure the resistance according to the value(s) in the table below. Standard resistance:
![]() (a) Disconnect the J19 air conditioning amplifier connector. (b) Measure the resistance and voltage according to the value(s) in the table below. Standard resistance:
Standard voltage:
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Toyota Tundra Service Manual > Can Communication System: Diagnosis System
DIAGNOSIS SYSTEM CHECK FOR INSTALLED SYSTEMS (ECUS AND SENSORS) THAT USE CAN COMMUNICATION (a) The systems (ECUs and sensors) that use CAN communication vary depending on the vehicle and optional equipment. Check which systems (ECUs and sensors) are installed to the vehicle. Connected to Code ECU/Se ...