System voltage is above 32 V
Measure the supply voltage to the expansion unit. Check power supply/ ground connection to expansion unit. Check for possible alternator/ battery failure. If DTC still is active it might be an internal failure in expansion unit. Replace the unit!
What you'll see
No driver-visible symptom recorded.
System reaction
• Functions dependent on the supply voltage are degraded.
Diagnostic depth
The DTC is set active if the supply voltage is above 32V for 2 seconds.. The DTC is set inactive if the sensor voltage is below 32V 1 seconds. The DTC is not set in the following cases: • system voltage is below 32V • system voltage is above 16V •The DTC is ignored during start-up (2000 ms). •The DTC is not detected during engine start (i.e. at engine speeds between 0 and 400 rpm)
Malfunctioning alternator.