Symptom Troubleshooting Chart

SYMPTOM TROUBLESHOOTING CHART

Condition	Possible Sources	Action
The PCM does not respond to the scan tool	Fuse Wiring, terminals or connectors PCM ABS module Instrument cluster (IC) Occupant classification sensor module (OCSM) Power steering control module (PSCM) Restraints control module (RCM)	See PINPOINT TEST 1: THE PCM DOES NOT RESPOND TO THE SCAN TOOL OR NO HIGH SPEED CONTROLLER AREA NETWORK (HS-CAN) COMMUNICATION .
The ABS module does not respond to the scan tool	Fuse Wiring, terminals or connectors ABS module	See PINPOINT TEST 2: THE ANTI-LOCK BRAKE SYSTEM (ABS) CONTROL MODULE DOES NOT RESPOND TO THE SCAN TOOL .
The 4X4 control module does not respond to the scan tool	Fuse Wiring, terminals or connectors 4X4 control module	See PINPOINT TEST 3: THE 4X4 CONTROL MODULE DOES NOT RESPOND TO THE SCAN TOOL .
The instrument cluster (IC) does not respond to the scan tool	Fuse Wiring, terminals or connectors IC	See PINPOINT TEST 4: THE INSTRUMENT CLUSTER (IC) DOES NOT RESPOND TO THE SCAN TOOL .
The restraints control module (RCM) does not respond to the scan tool	Fuse Wiring, terminals or connectors RCM	See PINPOINT TEST 5: THE RESTRAINTS CONTROL MODULE (RCM) DOES NOT RESPOND TO THE SCAN TOOL .
The occupant classification sensor module (OCSM) does not respond to the scan tool	Fuse Wiring, terminals or connectors OCSM	See PINPOINT TEST 6: THE OCCUPANT CLASSIFICATION SENSOR MODULE (OCSM) DOES NOT RESPOND TO THE SCAN TOOL .
The power steering control module (PSCM) does not respond to the scan tool	Fuse Wiring, terminals or connectors PSCM	See PINPOINT TEST 7: THE POWER STEERING CONTROL MODULE (PSCM) DOES NOT RESPOND TO THE SCAN TOOL .
The smart junction box (SJB) does not respond to the scan tool	Fuse Wiring, terminals or connectors SJB	See PINPOINT TEST 8: THE SMART JUNCTION BOX (SJB) DOES NOT RESPOND TO THE SCAN TOOL .
The audio control module (ACM) does not respond to the scan tool	Fuse Wiring, terminals or connectors ACM	See PINPOINT TEST 9: THE AUDIO CONTROL MODULE (ACM) DOES NOT RESPOND TO THE SCAN TOOL .
The satellite digital audio receiver system (SDARS) module does not respond to the scan tool	Fuse Wiring, terminals or connectors SDARS module	See PINPOINT TEST 10: THE SATELLITE DIGITAL AUDIO RECEIVER SYSTEM (SDARS) MODULE DOES NOT RESPOND TO THE SCAN TOOL .
The front display interface module (FDIM) does not respond to the scan tool	Fuse Wiring, terminals or connectors FDIM	See PINPOINT TEST 11: THE FRONT DISPLAY INTERFACE MODULE (FDIM) DOES NOT RESPOND TO THE SCAN TOOL .
The front controls interface module (FCIM) does not respond to the scan tool	Fuse Wiring, terminals or connectors FCIM	See PINPOINT TEST 12: THE FRONT CONTROLS INTERFACE MODULE (FCIM) DOES NOT RESPOND TO THE SCAN TOOL .
No medium speed controller area network (MS-CAN) communication, all modules are not responding	Wiring, terminals or connectors Audio unit FCIM FDIM IC SDARS module SJB	See PINPOINT TEST 13: NO MEDIUM SPEED CONTROLLER AREA NETWORK (MS-CAN) COMMUNICATION, ALL MODULES ARE NOT RESPONDING .
No high speed controller area network (HS-CAN) communication, all modules are not responding	Wiring, terminals or connectors ABS module 4X4 control module (if equipped) IC OCSM PCM PSCM RCM	See PINPOINT TEST 1: THE PCM DOES NOT RESPOND TO THE SCAN TOOL OR NO HIGH SPEED CONTROLLER AREA NETWORK (HS-CAN) COMMUNICATION
No power to the scan tool	Fuse Wiring, terminals or connectors Scan tool	See PINPOINT TEST 14: NO POWER TO THE SCAN TOOL .
The HVAC module does not respond to the scan tool	Fuse Wiring, terminals or connectors HVAC module	See PINPOINT TEST 15: THE HVAC MODULE DOES NOT RESPOND TO THE SCAN TOOL .