Symptom Troubleshooting Chart - Communications Network

SYMPTOM TROUBLESHOOTING CHART

Problem	Possible Cause	Action
The smart junction box (SJB) does not respond to the WDS or equivalent tester	Circuit or connection in the international standards organization (ISO) 9141 communications network SJB	See PINPOINT TEST 1: SMART JUNCTION BOX (SJB) DOES NOT RESPOND TO THE DIAGNOSTIC TOOL .
The restraints control module (RCM) does not respond to the WDS or equivalent tester	Circuit or connection in the international standards organization (ISO) 9141 communications network RCM	See PINPOINT TEST 2: RESTRAINTS CONTROL MODULE (RCM) DOES NOT RESPOND TO THE DIAGNOSTIC TOOL .
The anti-lock brake system (ABS) module does not respond to the WDS or equivalent tester	Circuit or connection in the international standards organization (ISO) 9141 communications network ABS module	See PINPOINT TEST 3: ANTI-LOCK BRAKE SYSTEM (ABS) MODULE DOES NOT RESPOND TO THE DIAGNOSTIC TOOL .
The four-wheel drive (4WD) control module does not respond to the WDS or equivalent tester	Circuit or connection in the international standards organization (ISO) 9141 communications network 4WD control module	See PINPOINT TEST 4: FOUR-WHEEL DRIVE (4WD) CONTROL MODULE DOES NOT RESPOND TO THE DIAGNOSTIC TOOL .
The instrument cluster does not respond to the WDS or equivalent tester	Circuit or connection in the controller area network (CAN) Instrument cluster	See PINPOINT TEST 5: NO CONTROLLER AREA NETWORK (CAN) COMMUNICATION .
The powertrain control module (PCM) does not respond to the WDS or equivalent tester	Circuit or connection in the standard corporate protocol (SCP) communications network PCM	See PINPOINT TEST 6: NO STANDARD CORPORATE PROTOCOL (SCP) COMMUNICATIONS NETWORK COMMUNICATION .
No controller area network (CAN) communication	Circuit or connection in the CAN Instrument cluster	See PINPOINT TEST 5: NO CONTROLLER AREA NETWORK (CAN) COMMUNICATION .
No standard corporate protocol (SCP) communications network communication	Circuit or connection in the SCP communications network Powertrain control module (PCM)	See PINPOINT TEST 6: NO STANDARD CORPORATE PROTOCOL (SCP) COMMUNICATIONS NETWORK COMMUNICATION .
No international standards organization (ISO) 9141 communications network communication	Circuit or connection in ISO 9141 communications network ISO 9141 communications network modules	See PINPOINT TEST 7: NO INTERNATIONAL STANDARDS ORGANIZATION (ISO) 9141 COMMUNICATIONS NETWORK COMMUNICATION .
No module/network communication - no power to the WDS or equivalent tester	Data link connector (DLC) Fuse Circuitry Diagnostic tool	PINPOINT TEST 8: NO MODULE/NETWORK COMMUNICATION - NO POWER TO THE DIAGNOSTIC TOOL