April 5, 2026: LEMON Manuals is launched! Read the announcement.

Checking The Component And Wiring

Fig 1: Identifying Ignition OFF

GLL101045

Courtesy of VOLVO CARS CORPORATION

Fig 2: Disconnecting Connector

GLL101071

Courtesy of VOLVO CARS CORPORATION

Ignition off
Disconnect the connector for the microphone in the rear view mirror
Disconnect the 16-pin connector for the audio module (AUD).
Check the cable terminals in the female and male sections of the connector. The cable terminals must not be damaged or pressed back.

Check the signal cable between audio module (AUD) terminal #B8 and microphone input terminal #A2 (pin B). Check for a short-circuit to ground.

Check the signal cable between audio module (AUD) terminal #B16 and microphone input terminal #A1 (pin A). Check for a short-circuit to ground.

Check the resistance between terminal #A1 (pin A) and #A2 (pin B) in the microphone connector. The resistance should be between 100 Ω - 10 kΩ.

Remedy as necessary.

Other information
- see CONNECTING THE BREAKOUT BOX
- see SIGNAL SPECIFICATION
- see AUDIO MODULE
- see MICROPHONE TELEPHONE
- see CONTENTS
Fig 3: Identifying 1-Bit Connector
Courtesy of VOLVO CARS CORPORATION

Fig 4: Connector F, Carphone Antenna (Brown Connector)
Courtesy of VOLVO CARS CORPORATION

Continue
Refer to VERIFICATION