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AV-128 < COMPONENT DIAGNOSIS > [BOSE AUDIO WITHOUT NAVIGATION] REAR TWEETER (COUPE) REAR TWEETER (COUPE) Description INFOID:0000000004206454 The audio unit sends audio signals to the BOSE speaker amp. The BOSE speaker amp. amplifies the audio signals before sending them to the rear tweeters using the audio signal circuits. Diagnosis Procedure INFOID:0000000004206455 1. HARNESS CHECK 1. Disconnect BOSE speaker amp. connectors B121, B122 and suspect tweeter connector. 2. Check continuity between BOSE speaker amp. harness connec- tors B121 (A) and B122 (B) and suspect tweeter harness con- nector (C). 3. Check continuity between BOSE speaker amp. harness connec- tors B121 (A) and B122 (B) and ground. Are the continuity test results as specified? YES >> GO TO 2 NO >> • Check connector housings for disconnected or loose terminals. • Repair harness or connector. 2. REAR DOOR SPEAKER SIGNAL CHECK Connector Terminal Connector Terminal Continuity A: B121 55 C: D202 2 Yes 68 1 B: B122 49 C: D302 2 54 1 Connector Terminal - Continuity A: B121 55 Ground No 68 B: B122 49 54 ALNIA0141ZZ |