Acura RL. Instruction — page 201

26. Disconnect active noise control rear microphone connector A (2P) and stereo amplifier connector C

(23P).

27. Check for continuity between the active noise control unit 16P connector No. 4 terminal and active

noise control rear microphone connector A (2P) No. 2 terminal.

Fig. 86: Checking Continuity Between No. 4 Terminal And No. 2 Terminal
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES — Go to step 28.

NO — Repair open in the wire between the active noise control unit 16P connector No. 4 terminal and
active noise control front microphone connector A (2P) No. 2 terminal.

28. Check for continuity between the active noise control unit 16P connector No. 5 terminal and active

noise control rear microphone connector A (2P) No. 1 terminal.

Fig. 87: Checking Continuity Between No. 5 Terminal And No. 1 Terminal
Courtesy of AMERICAN HONDA MOTOR CO., INC.

2007 Acura RL

2005-08 ACCESSORIES AND EQUIPMENT Audio System — RL

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Is there continuity?

YES — Replace the active noise control unit (see ACTIVE NOISE CONTROL UNIT
REMOVAL/INSTALLATION
).

NO — Repair open in the wire between the active noise control unit 16P connector No. 5 terminal and
active noise control rear microphone connector A (2P) No. 1 terminal.

29. Check for the No. 32 (10A) and the No. 5 (7.5A) (’06-07 models) fuses in the driver’s under-dash

fuse/relay box.

Are the fuses OK?

YES — Go to step 30.

NO — Replace the fuse, and recheck.

30. Disconnect the active noise control unit 16P connector.

31. Measure the voltage between the active noise control unit 16P connector No. 8 terminal and body

ground.

Fig. 88: Measuring Voltage Between Active Noise Control Unit 16P Connector No. 8 Terminal
And Body Ground

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES — Go to step 32.

NO — Repair open in the wire between the No. 32 (10A) fuse (’05 model) or No. 5 (7.5A) fuse (’06-08
models) in the driver’s under-dash fuse/relay box and the active noise control unit 16P connector No.
8 terminal.

32. Reconnect the active noise control unit (16P) connector.

33. Turn the ignition switch ON (II).

34. Measure the voltage between the active noise control unit 16P connector No. 7 terminal and body

ground.

2007 Acura RL

2005-08 ACCESSORIES AND EQUIPMENT Audio System — RL

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Page 83

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Fig. 89: Measuring Voltage Between Active Noise Control Unit 16P Connector No. 7 Terminal
And Body Ground

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there less than 0.1V?

YES — Go to step 35.

NO — Repair open in the wire between the active noise control unit 16P connector No. 7 terminal and
body ground (G652).

35. Reconnect the active noise control unit 16P connector.

36. Perform the self-diagnostic function (see SELF-DIAGNOSTIC FUNCTION ).

37. Press the «No. 1» button.

38. Measure the voltage between the active noise control unit 16P connector No. 12 terminal and body

ground.

Fig. 90: Measuring Voltage Between Active Noise Control Unit 16P Connector No. 12 Terminal
And Body Ground

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there about 5 V?

YES — Go to step 44.

NO — Go to step 39.

39. Turn the ignition switch to LOCK (0).

40. Disconnect the active noise control unit 16P connector and stereo amplifier connector A (26P).

41. Check for continuity between the active noise control unit 16P connector No. 12 terminal and stereo

2007 Acura RL

2005-08 ACCESSORIES AND EQUIPMENT Audio System — RL

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amplifier connector A (26P) No. 18 terminal.

Fig. 91: Checking Continuity Between No. 12 Terminal And Stereo Amplifier Connector A
(26P) No. 18 Terminal

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES — Go to step 42.

NO — Repair open in the wire between the active noise control unit 16P connector No. 12 terminal and
stereo amplifier connector A (26P) No. 18 terminal.

42. Check for continuity between body ground and the active noise control unit 16P connector No. 12

terminal.

Fig. 92: Checking Continuity Between Body Ground And Active Noise Control Unit 16P
Connector No. 12 Terminal

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES — Repair short in the wire between the active noise control unit 16P connector No. 12 terminal
and stereo amplifier connector A (26P) No. 18 terminal.

NO — Replace the stereo amplifier (see STEREO AMPLIFIER REMOVAL/INSTALLATION ).

43. Reconnect the active noise control unit (16P) connector.

2007 Acura RL

2005-08 ACCESSORIES AND EQUIPMENT Audio System — RL

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© 2005 Mitchell Repair Information Company, LLC.

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