Checking the Power Supply and Ground Terminals Power Supply, Integrated Audio Module (IAM)

Checking The Supply Voltage/Ground Terminal, Integrated Audio Module (IAM)

Checking the power supply and ground terminals Power supply, Integrated Audio Module (IAM)





The Integrated Audio Module (IAM) is supplied with voltage via a voltage input on the control module.

With ignition on the voltage input is supplied with voltage and the Integrated Audio Module (IAM) is in active mode.

- Voltage input 1 (#A1) is supplied with voltage via a fuse from the Central Electronic Module (CEM). The Integrated Audio Module (IAM) will not be activated in the event of open circuits.

Checking the power supply
Check the power supply cable from the battery to the Central Electronic Module (CEM) and from the Central Electronic Module (CEM) to the Integrated Audio Module (IAM) (#A1) with regard to open circuits, loose connections, contact resistance and corrosion. Check the fuse too. The voltage should be approximate battery voltage with the ignition on.

Ground terminal, Integrated Audio Module (IAM)
The Integrated Audio Module (IAM) has a ground input. The ground input from the control module is connected via a ground cable to the ground terminal in the body.

- Ground input 1 (#A14) is power ground and connected to the ground terminal in the body.

Checking the ground terminal
Check the ground cable between the Integrated Audio Module (IAM) (#A14) and the ground terminal with regard to open circuits, loose connections, contact resistance and corrosion. With the ignition on the voltage drop between the Integrated Audio Module (IAM) ground terminal and the chassis connection must not be greater than 0.5 V.

Remedy as necessary.

Other information
- Signal description, Integrated Audio Module (IAM)
- See the relevant wiring diagram for information about circuits and ground terminals in the bodywork.
- Checking wiring and terminals

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