B1422

DTC B1422

CIRCUIT DESCRIPTION
The hybrid control module (HCM) monitors Ignition 1, Ignition 0 discrete wires from the ignition switch contacts, and the Crank state message from powertrain control module (PCM). If HCM detects a mismatch between ignition switch signals and the Crank state message, it will set the DTC.




The table represents correct HCM power mode data:

CONDITIONS FOR RUNNING THE DTC
Either one of the below conditions has to satisfied:
- Ignition 0 voltage is between 8-16 volts.
- Power maintain is true and DC/DC direction is 42-14 volts.

CONDITIONS FOR SETTING THE DTC




The DTC will set if any of the following cases is detected for about 2.5 milliseconds.

ACTION TAKEN WHEN THE DTC SETS
The HCM implements default actions when a fault is detected.

CONDITIONS FOR CLEARING THE DTC
- A current DTC clears when the malfunction is no longer present.
- A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction.

TEST

Steps 1-9:

Steps 10-14: