TERMINALS OF ECU 1. CHECK AIR CONDITIONING AMPLIFIER (a) Disconnect the J19 air conditioning amplifier connector. (b) Measure the resistance and voltage according to the value(s) in the table below.
(c) Reconnect the J19 air conditioning amplifier connector. (d) Measure the voltage according to the value(s) in the table below.
2. CHECK AIR CONDITIONING CONTROL ASSEMBLY (a) Disconnect the J127 air conditioning control assembly connector. (b) Measure the voltage and resistance according to the value(s) in the table below.
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Toyota Tundra Service Manual > Navigation System: Vehicle Speed Signal Circuit between Stereo Component Amplifier and Combination Meter
DESCRIPTION The stereo component amplifier assembly receives a vehicle speed signal from the combination meter assembly to control the ASL function. HINT: A voltage of 12 V or 5 V is output from each ECU and then input to the combination meter assembly. The signal is changed to a pulse signal at the ...