Determining Open Circuit Location (HS-Can) [Multiplex Communication System]: A: ATX

Possible cause 

• Connector terminal disconnection, poor contact, damage, deformation, corrosion
• Open circuit in wiring harness between PCM and branch A
• PCM malfunction

Fig 1: Multiplex Communication System (ATX) - Wiring Diagram

Inspection item 

• PCM connector
• Wiring harness between PCM terminal 1AM and branch A
• Wiring harness between PCM terminal 1AI and branch A
• PCM