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Home >> Volvo >> 2009 >> XC90 Base, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Infotainment >> Integrated Audio Module (IAM) And Infotainment Control Module (ICM) Diagnostic Trouble Codes >> ICM-1F21: Left-Hand Keypad Circuit 1. Signal Too High / Too Low (2003-2014) >> Signal Too High / Low >> Checking The Wiring And Component

Checking The Wiring And Component

Check the connections between the left-hand keypad and the infotainment control module (ICM). Check for contact resistance and oxidation. Check for loose connections. Check for damage in particular.

Visually check the cable between the keypad and the control module for damage.

If no faults were found, try a new keypad.

Remedy as necessary.

Other information: 

Fig 1: Identifying Left-Hand Keypad
GLL102027Courtesy of VOLVO CARS CORPORATION