SYMPTOM TROUBLESHOOTING CHART[MULTIPLEX COMMUNICATION SYSTEM (AJ (3.0L Duratec))]

id0903g7812700

Malfunction

Possible Cause

Action

•  The ABS HU/CM does not respond to the M-MDS.

•  Malfunction in International Standards Organization (ISO) 9141 network circuit or connection error

•  ABS HU/CM

(See No.1 ABS HU/CM DOES NOT RESPOND TO M-MDS[MULTIPLEX COMMUNICATION SYSTEM (AJ (3.0L Duratec))].)

•  The SAS control module does not respond to the M-MDS.

•  Malfunction in ISO 9141 network circuit or connection error

•  SAS control module

(See No.2 SAS CONTROL MODULE DOES NOT RESPOND TO M-MDS[MULTIPLEX COMMUNICATION SYSTEM (AJ (3.0L Duratec))].)

•  The Generic Electronic Module (GEM) does not respond to the M-MDS.

•  Malfunction in ISO 9141 network circuit or connection error

•  Generic electronic module (GEM)

(See No.3 GENERIC ELECTRONIC MODULE (GEM) DOES NOT RESPOND TO M-MDS[MULTIPLEX COMMUNICATION SYSTEM (AJ (3.0L Duratec))].)

•  Instrument cluster does not respond to the M-MDS.

•  Malfunction in the standard corporate protocol (SCP) network circuit or connection error

•  Instrument cluster

(See No.4 INSTRUMENT CLUSTER DOES NOT RESPOND TO M-MDS[MULTIPLEX COMMUNICATION SYSTEM (AJ (3.0L Duratec))].)

•  The PCM does not respond to the M-MDS.

•  Malfunction in SCP network circuit or connection error

•  PCM

(See No.5 PCM DOES NOT RESPOND TO M-MDS[MULTIPLEX COMMUNICATION SYSTEM (AJ (3.0L Duratec))].)

•  ISO 9141 network does not establish communication.

•  Malfunction in ISO 9141 network circuit or connection error

•  ISO 9141 network module

(See No.6 ISO 9141 NETWORK DOES NOT ESTABLISH COMMUNICATION[MULTIPLEX COMMUNICATION SYSTEM (AJ (3.0L Duratec))].)

•  The SCP network does not establish communication.

•  Malfunction in SCP network circuit or connection error

•  SCP network module

(See No.7 SCP NETWORK DOES NOT ESTABLISH COMMUNICATION[MULTIPLEX COMMUNICATION SYSTEM (AJ (3.0L Duratec))].)

•  Module/network does not establish communication.—Power is not supplied to the M-MDS.

•  DLC-2

•  Central junction box (CJB) fuse

•  Circuit

•  M-MDS

(See No.8 MODULE/NETWORK DOES NOT ESTABLISH COMMUNICATION - POWER IS NOT SUPPLIED TO M-MDS[MULTIPLEX COMMUNICATION SYSTEM (AJ (3.0L Duratec))].)

Malfunction	Possible Cause	Action
• The ABS HU/CM does not respond to the M-MDS.	• Malfunction in International Standards Organization (ISO) 9141 network circuit or connection error • ABS HU/CM	(See No.1 ABS HU/CM DOES NOT RESPOND TO M-MDS[MULTIPLEX COMMUNICATION SYSTEM (AJ (3.0L Duratec))].)
• The SAS control module does not respond to the M-MDS.	• Malfunction in ISO 9141 network circuit or connection error • SAS control module	(See No.2 SAS CONTROL MODULE DOES NOT RESPOND TO M-MDS[MULTIPLEX COMMUNICATION SYSTEM (AJ (3.0L Duratec))].)
• The Generic Electronic Module (GEM) does not respond to the M-MDS.	• Malfunction in ISO 9141 network circuit or connection error • Generic electronic module (GEM)	(See No.3 GENERIC ELECTRONIC MODULE (GEM) DOES NOT RESPOND TO M-MDS[MULTIPLEX COMMUNICATION SYSTEM (AJ (3.0L Duratec))].)
• Instrument cluster does not respond to the M-MDS.	• Malfunction in the standard corporate protocol (SCP) network circuit or connection error • Instrument cluster	(See No.4 INSTRUMENT CLUSTER DOES NOT RESPOND TO M-MDS[MULTIPLEX COMMUNICATION SYSTEM (AJ (3.0L Duratec))].)
• The PCM does not respond to the M-MDS.	• Malfunction in SCP network circuit or connection error • PCM	(See No.5 PCM DOES NOT RESPOND TO M-MDS[MULTIPLEX COMMUNICATION SYSTEM (AJ (3.0L Duratec))].)
• ISO 9141 network does not establish communication.	• Malfunction in ISO 9141 network circuit or connection error • ISO 9141 network module	(See No.6 ISO 9141 NETWORK DOES NOT ESTABLISH COMMUNICATION[MULTIPLEX COMMUNICATION SYSTEM (AJ (3.0L Duratec))].)
• The SCP network does not establish communication.	• Malfunction in SCP network circuit or connection error • SCP network module	(See No.7 SCP NETWORK DOES NOT ESTABLISH COMMUNICATION[MULTIPLEX COMMUNICATION SYSTEM (AJ (3.0L Duratec))].)
• Module/network does not establish communication.—Power is not supplied to the M-MDS.	• DLC-2 • Central junction box (CJB) fuse • Circuit • M-MDS	(See No.8 MODULE/NETWORK DOES NOT ESTABLISH COMMUNICATION - POWER IS NOT SUPPLIED TO M-MDS[MULTIPLEX COMMUNICATION SYSTEM (AJ (3.0L Duratec))].)