MECU Power Supply

The value indicates battery voltage at the Central Electronic Module (CEM). The Accessory Electronic Module (AEM) obtains the value from the Central Electronic Module (CEM) via CAN.

Measurement range: 5-38 V.

Normal value when alternator is charging: 13.0 - 14.5 V.

If a voltage of 36.75 V or 36.875 V is displayed, the value from the controller area network (CAN) is faulty according to the transmission control module (TCM).