DESCRIPTION A direct ignition system is used on this vehicle. The direct ignition system is a 1 cylinder ignition system which ignites one cylinder with one ignition coil. In the 1 cylinder ignition system, one spark plug is connected to the end of the secondary winding. High voltage is generated in the secondary winding and is applied directly to the spark plug. The spark of the spark plug passes from the center electrode to the ground electrode. The ECM determines the ignition timing and transmits the ignition signals for each cylinder. Using the ignition signal, the ECM turns on and off the power transistor inside the igniter, which switches on and off a current to the primary coil. When the current to the primary coil is cut off, high voltage is generated in the secondary coil and this voltage is applied to the spark plugs to create sparks inside the cylinders. WIRING DIAGRAM ![]() CAUTION / NOTICE / HINT NOTICE: Inspect the fuses for circuits related to this system before performing the following procedure. HINT: Perform a spark test before proceeding. If there is no spark for any cylinder, inspect this circuit. Click here PROCEDURE
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(a) Disconnect the ignition coil assembly connectors. (b) Turn the power switch on (IG). (c) Measure the voltage according to the value(s) in the table below. Standard Voltage:
(a) Disconnect the ignition coil assembly connectors. (b) Disconnect the ECM connector. (c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(a) Disconnect the ignition coil assembly connectors. (b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(a) Disconnect the IG2 NO. 1 relay from No. 1 engine room relay block and No. 1 junction block assembly. (b) Disconnect the ignition coil assembly connectors. (c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Navigation System(for Gasoline Model): Black Screen
PROCEDURE 1. CHECK DISPLAY SETTING (a) Check that the display is not in screen off mode. OK: The display setting is not in screen off mode. NG CHANGE SCREEN TO SCREEN ON MODE OK 2. CHECK IMAGE QUALITY SETTING (a) Check that the screen color quality can be set. OK: Setting is possible. OK SET SCREEN ...