VOLVO
ICM-1F28 - Right-hand keypad circuit 2. Signal too high / too low
System
Infotainment Control Module (ICM)
Volvo models this fault code applies to
Applies to the following models:
1 modelXC90 (2003–)
Show models by year and engine (1)
What does this fault code mean?
The ICM monitors the signal circuit for the up, down and CD eject buttons on the right-hand keypad. The fault code is set when the signal is too high or too low, and those buttons may stop working.
Possible causes
- Short circuit to ground or open circuit in the right-hand keypad
- Short circuit to ground or open circuit in the wire to the keypad
What you can do
- 1Press the up, down and CD eject buttons and see whether any of them gives no response
- 2Read the code, clear it and check whether it returns after a test drive
- 3Inspect the plugs for the right-hand keypad for contact resistance, oxidation, play and damage
- 4Use a multimeter to check that the wire to the keypad has no contact with ground and is not broken; if no fault is found, a workshop can try a new keypad
Symptoms you may notice1
- The buttons on the right-hand keypad do not work
General guidance for car owners. Diagnosis on the car can point to a different cause.