INSPECTION PROCEDURE 1. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY (for Standard) ![]() (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. 1 speaker assembly. Text in Illustration
2. INSPECT FRONT NO. 1 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. 1 speaker assembly. Text in Illustration
3. INSPECT FRONT NO. 3 SPEAKER ASSEMBLY (for 12 Speakers) (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:
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Toyota Tundra Service Manual > Sfi System: Open in Secondary Air Injection System Heater Control Circuit (P144C,P144D)
DESCRIPTION The ECM operates the air pump heater (AI HTR) relay which causes the air pump heater (AI HTR) to operate. DTC No. DTC Detection Condition Trouble Area P144C Open or short in the air pump heater (AI HTR) relay circuit for 5 seconds (1 trip detection logic). Open or short in air pump heate ...