INSPECTION PROCEDURE 1. INSPECT FRONT NO. 2 SPEAKER ASSEMBLY (for Standard) (a) When there is a malfunction such as noise from a speaker or no sound at all, replace the speaker with a new one and check that the malfunction disappears. OK: Malfunction disappears. HINT:
2. INSPECT FRONT NO. 2 SPEAKER ASSEMBLY (for 12 Speakers) (a) Measure the resistance according to the value(s) in the table below. Standard resistance:
If the result is not as specified, replace the front No. 2 speaker assembly. Text in Illustration
3. INSPECT FRONT NO. 4 SPEAKER ASSEMBLY (for Standard) (a) Temporarily replace the front No. 4 speaker assembly with a new or normally functioning one. OK: Malfunction disappears. HINT: Connect the connectors to the front No. 4 speaker assembly. 4. INSPECT FRONT NO. 4 SPEAKER ASSEMBLY (for 12 Speakers) (a) Measure the resistance according to the value(s) in the table below. Standard resistance:
If the result is not as specified, replace the front No. 4 speaker assembly. Text in Illustration
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Toyota Tundra Service Manual > Meter / Gauge System: Lost Communication with Front Camera Module (U023A)
DESCRIPTION The combination meter assembly communicates with the forward recognition camera via the CAN line. DTC Code DTC Detection Condition Trouble Area U023A When either of following conditions is detected: IG voltage 10.5 V or more No communication with forward recognition camera continues for ...