B153A Code: Meaning, Causes, and Symptoms | OBD2 Codes

B153A – Liftgate Latch Switches Malfunction

 

B153A Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

B153A Possible Causes

 

Faulty Liftgate Latch Assembly,Liftgate Latch Assembly harness is open or shorted,Liftgate Latch Assembly circuit poor electrical connection,Faulty Liftgate Control Module

 

B153A Description

 

The unlatch, ratchet, pawl, and sector switches are part of the liftgate latch assembly and are used by the liftgate control module to determine the state of the latch during the process of cinching or unlatching. The ratchet and pawl switches will be inactive when the primary and secondary latches are latched, and the sector switch will be active during the power cinch function. Each of the latch switch signal circuits are supplied signal through a resistor and monitored within the liftgate control module. The latch switches share a common low reference circuit from the liftgate control module and when the switch contacts close the signal circuit goes low and the liftgate control module determines the switch to be active.