Module Communications Network System: Diagnosis

Inspection and Verification

Verify the customer concern.
Visually inspect for obvious signs of electrical damage. VISUAL INSPECTION CHART Electrical Battery junction box (BJB) fuse(s): 23 (10A) (no communication with the PCM) 29 (30A) (no communication with the liftgate/trunk module [LTM]) 32 (30A) (no communication with the driver seat module [DSM]) 38 (10A) (no communication with the ABS module) 47 (15A) (no communication with the PCM) Smart junction box (SJB) fuse(s): 3 (15A) (no communication with the accessory protocol interface module [APIM], satellite digital audio receiver system [SDARS] module, rear entertainment module [RETM]) 5 (10A) (no communication with the SJB) 11 (10A) (no communication with the 4X4 control module) 12 (7.5A) (no communication with the DSM) 13 (5A) (no communication with the steering effort control module [SECM]) 14 (10A) (no communication with the LTM) 15 (10A) (no communication with the heating ventilation air conditioning [HVAC] module) 20 (15A) (no power to scan tool) 26 (10A) (no communication with the instrument cluster [IC]) 29 (5A) (no communication with the IC) 32 (10A) (no communication with the restraints control module [RCM]) 35 (10A) (no communication with the parking aid module [PAM], SECM) 37 (10A) (no communication with the HVAC module) 39 (20A) (no communication with the audio control module [ACM]) 41 (15A) (no communication with the ACM) 46 (7.5A) (no communication with the RCM, occupant classification system module [OCSM]) Data link connector (DLC) Wiring harness Wiring, terminals or connectors
If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
If the cause is not visually evident, connect the scan tool to the DLC. If the scan tool does not communicate with the VCM: Check the VCM connection to the vehicle. Check the scan tool connection to the VCM. Go to «Pinpoint Test Q»(ref-293472-S19081825972008080700000) , to diagnose no power to the scan tool.
Carry out the network test. If the network test passes, retrieve and record the continuous memory DTCs and proceed to Step 6. If the network test fails, go to «Symptom Chart»(ref-293472-S39384733902008080700000) to identify the module not communicating.
If the DTCs retrieved are related to the concern, go to DTC Tables. For all other DTCs, refer to «MULTIFUNCTION ELECTRONIC MODULES»(ref-293473) article.
If no DTCs related to the concern are retrieved, go to «Symptom Chart»(ref-293472-S39384733902008080700000) .

DTC Tables

Note. Network DTCs (U-codes) are often a result of intermittent concerns such as faulty wiring or low battery voltage occurrences. Additionally, vehicle service procedures such as module reprogramming will often set network DTCs. Replacing a module to resolve a network DTC is unlikely to resolve the concern. To prevent repeat network DTC concerns, inspect all network wiring, especially connectors. Test the vehicle battery, refer to BATTERY, MOUNTING AND CABLES article.

DTC	Description	Source	Action
U0073	Control Module Communication Bus A Off	ABS module	DTC U0073 indicates the module could not communicate on the network at a point in time. The fault is currently not present. CLEAR the DTC. REPEAT the network test with the scan tool.
U0073	Control Module Communication Bus A Off	Heating ventilation air conditioning (HVAC) module	DTC U0073 indicates the module could not communicate on the network at a point in time. The fault is currently not present. CLEAR the DTC. REPEAT the network test with the scan tool.
U0073	Control Module Communication Bus A Off	Instrument cluster (IC)	DTC U0073 indicates the module could not communicate on the high speed controller area network (HS-CAN) at a point in time. The fault is currently not present. CLEAR the DTC. REPEAT the network test with the scan tool.
U0073	Control Module Communication Bus A Off	Steering effort control module (SECM)	DTC U0073 indicates the module could not communicate on the network at a point in time. The fault is currently not present. CLEAR the DTC. REPEAT the network test with the scan tool.
U0074	Control Module Communication Bus B Off	ABS module	DTC U0074 indicates the module could not communicate on the medium speed controller area network (MS-CAN) at a point in time. The fault is currently not present. CLEAR the DTC. REPEAT the network test with the scan tool.
U0074	Control Module Communication Bus B Off	IC	DTC U0074 indicates the module could not communicate on the MS-CAN at a point in time. The fault is currently not present. CLEAR the DTC. REPEAT the network test with the scan tool.
U0100	Lost Communication With ECM/PCM	ABS module	The fault is not currently present if the PCM communicates with the scan tool. CLEAR the DTC. REPEAT the network test with the scan tool.
U0100	Lost Communication With ECM/PCM	IC	The fault is not currently present if the PCM communicates with the scan tool. CLEAR the DTC. REPEAT the network test with the scan tool.
U0100	Lost Communication With ECM/PCM	Restraints control module (RCM)	The fault is not currently present if the PCM communicates with the scan tool. CLEAR the DTC. REPEAT the network test with the scan tool.
U0100	Lost Communication With ECM/PCM	SECM	The fault is not currently present if the PCM communicates with the scan tool. CLEAR the DTC. REPEAT the network test with the scan tool.
U0100	Lost Communication With ECM/PCM	4X4 control module	The fault is not currently present if the PCM communicates with the scan tool. CLEAR the DTC. REPEAT the network test with the scan tool.
U0102	Lost Communication With Transfer Case Control Module (4X4CM)	ABS module	Go to Pinpoint Test D .
U0114	Lost Communication With Four-Wheel Drive Clutch Control Module	ABS module	Go to Pinpoint Test D .
U0114	Lost Communication With Four-Wheel Drive Clutch Control Module	IC	Go to Pinpoint Test C .
U0121	Lost Communication With ABS Control Module	4X4 control module	CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module which fails the network test.
U0121	Lost Communication With ABS Control Module	IC	CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module which fails the network test.
U0121	Lost Communication With ABS Control Module	SECM	CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module which fails the network test.
U0126	Lost Communication With Steering Angle Sensor Module	SECM	REFER to VEHICLE DYNAMIC SYSTEMS article.
U0140	Lost Communication With Body Control Module (GEM)	Audio control module (ACM)	REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article.
U0140	Lost Communication With Body Control Module (GEM)	Rear entertainment module (RETM)	REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article.
U0140	Lost Communication With Body Control Module (GEM)	Driver seat module (DSM)	Go to Pinpoint Test H .
U0140	Lost Communication With Body Control Module (GEM)	HVAC module	Go to Pinpoint Test H .
U0140	Lost Communication With Body Control Module (GEM)	IC	Go to Pinpoint Test H .
U0140	Lost Communication With Body Control Module (GEM)	Liftgate/trunk module (LTM)	Go to Pinpoint Test H .
U0151	Lost Communication With Restraints Control Module	IC	Go to Pinpoint Test E .
U0151	Lost Communication With Restraints Control Module	Occupant classification system module (OCSM)	Go to Pinpoint Test E .
U0154	Lost Communication With Restraints Occupant Classification System Module (OCS)	RCM	Go to Pinpoint Test F .
U0155	Lost Communication With Instrument Panel Cluster (IC) Control Module	4X4 control module	Go to Pinpoint Test C .
U0155	Lost Communication With Instrument Panel Cluster (IC) Control Module	ACM	REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article.
U0155	Lost Communication With Instrument Panel Cluster (IC) Control Module	DSM	Go to Pinpoint Test C .
U0155	Lost Communication With Instrument Panel Cluster (IC) Control Module	LTM	Go to Pinpoint Test C .
U0155	Lost Communication With Instrument Panel Cluster (IC) Control Module	SJB	Go to Pinpoint Test C .
U0155	Lost Communication With Instrument Panel Cluster (IC) Control Module	ABS module	CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module which fails the network test.
U0155	Lost Communication With Instrument Panel Cluster (IC) Control Module	SECM	CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module which fails the network test.
U0159	Lost Communication With Parking Assist Control Module (PAM)	ACM	REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article.
U0164	Lost Communication With HVAC Control Module (EATC)	IC	Go to Pinpoint Test N .
U0184	Lost Communication With Radio (ACM)	Accessory protocol interface module (APIM)	REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article.
U0184	Lost Communication With Radio (ACM)	RETM	REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article.
U0184	Lost Communication With Radio (ACM)	Satellite digital audio receiver system (SDARS) module	REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article.
U0193	Lost Communication With Digital Audio Control Module (SDARS)	ACM	REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article.
U0193	Lost Communication With Digital Audio Control Module (SDARS)	RETM	REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article.
U0196	Lost Communication With Entertainment Control Module A	ACM	REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article.
U0196	Lost Communication With Entertainment Control Module A	APIM	REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article.
U0196	Lost Communication With Entertainment Control Module A	SDARS module	REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article.
U0197	Lost Communication With Telephone Control Module	ACM	REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article.
U0197	Lost Communication With Telephone Control Module	SDARS module	REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article.
U0208	Lost Communication With Seat Control Module (DSM)	IC	Go to Pinpoint Test J .
U0212	Lost Communication With Steering Column Control Module	SECM	REFER to VEHICLE DYNAMIC SYSTEMS article.
U0230	Lost Communication With Rear Gate Module (LTM)	IC	Go to Pinpoint Test L .
U0238	Lost Communication With Digital Audio Control Module "D" (DSP)	ACM	REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article.
U0249	Lost Communication With Entertainment Control Module - Rear "B" (RCU)	ACM	REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article.
U0249	Lost Communication With Entertainment Control Module - Rear "B" (RCU)	APIM	REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article.
U0249	Lost Communication With Entertainment Control Module - Rear "B" (RCU)	SDARS module	REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article.
U0255	Lost Communication With Front Controls Interface Module	APIM	REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article.
U0255	Lost Communication With Front Controls Interface Module	SDARS module	REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article.
U0256	Lost Communication With Front Display Interface Module	APIM	REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article.
U0256	Lost Communication With Front Display Interface Module	SDARS module	REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article.
U0401	Invalid Data Received from ECM/PCM A	4X4 control module	RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES article.
U0401	Invalid Data Received from ECM/PCM A	SECM	RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES article.
U0415	Invalid Data Received from ABS Control Module	4X4 control module	RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES article.
U0415	Invalid Data Received from ABS Control Module	SECM	RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES article.
U2013	Compass Module is Not Responding	IC	REFER to INSTRUMENT CLUSTER (IC), MESSAGE CENTER, AND WARNING CHIMES article.
U2023	Fault Received From External Node	ABS module	RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES article.
U2023	Fault Received From External Node	IC	RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES article.
U2023	Fault Received From External Node	RCM	RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES article.
U2023	Fault Received From External Node	SECM	RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES article.
U2196	Invalid 'Engine RPM' Data	IC	RETRIEVE and FOLLOW non-network DTCs from the PCM.
U2199	Invalid 'Engine Coolant Temperature' Data	IC	RETRIEVE and FOLLOW non-network DTCs from the PCM.
U2471	Unexpected PRNDL State	LTM	REFER to HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS article.
U2472	Unexpected Ignition State	IC	REFER to INSTRUMENT CLUSTER (IC), MESSAGE CENTER, AND WARNING CHIMES article.
U2472	Unexpected Ignition State	LTM	REFER to HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS article.
U2472	Unexpected Ignition State	SJB	REFER to MULTIFUNCTION ELECTRONIC MODULES article.
U2473	Unexpected Vehicle Speed (VSS)	ACM	REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article.
U2473	Unexpected Vehicle Speed (VSS)	LTM	REFER to HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS article.
U2473	Unexpected Vehicle Speed (VSS)	SJB	REFER to MULTIFUNCTION ELECTRONIC MODULES article.
U2510	CAN - Invalid Data for Vehicle Security	IC	REFER to ANTI-THEFT - PASSIVE ANTI-THEFT SYSTEM (PATS) article.
U2511	CAN - Data Mis-Match (Receive Data Does Not Match Expected)	IC	RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to ANTI-THEFT - PASSIVE ANTI-THEFT SYSTEM (PATS) article.
U261A	CAN Data / Configuration Setup Mismatch	IC	RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES article.

COMMUNICATION NETWORK DTC TABLE

Symptom Chart

Condition	Possible Sources	Action
The PCM does not respond to the scan tool	Fuse Wiring, terminals or connectors PCM	Go to Pinpoint Test A .
The ABS module does not respond to the scan tool	Fuse Wiring, terminals or connectors ABS module	Go to Pinpoint Test B .
The instrument cluster (IC) does not respond to the scan tool	Fuse Wiring, terminals or connectors IC	Go to Pinpoint Test C .
The 4X4 control module does not respond to the scan tool	Fuse Wiring, terminals or connectors 4X4 control module	Go to Pinpoint Test D .
The restraints control module (RCM) does not respond to the scan tool	Fuse Wiring, terminals or connectors Case ground open RCM	Go to Pinpoint Test E .
The occupant classification system module (OCSM) does not respond to the scan tool	Fuse Wiring, terminals or connectors Case ground open OCSM	Go to Pinpoint Test F .
The steering effort control module (SECM) does not respond to the scan tool	Fuse Wiring, terminals or connectors SECM	Go to Pinpoint Test G .
The smart junction box (SJB) does not respond to the scan tool	Fuse Wiring, terminals or connectors SJB	Go to Pinpoint Test H .
The audio control module (ACM) does not respond to the scan tool	Fuse Wiring, terminals or connectors ACM	Go to Pinpoint Test I .
The driver seat module (DSM) does not respond to the scan tool	Fuse Wiring, terminals or connectors DSM	Go to Pinpoint Test J .
The rear entertainment module (RETM) does not respond to the scan tool	Fuse Wiring, terminals or connectors RETM	Go to Pinpoint Test K .
The liftgate/trunk module (LTM) does not respond to the scan tool	Fuse Wiring, terminals or connectors LTM	Go to Pinpoint Test L .
The satellite digital audio receiver system (SDARS) module does not respond to the scan tool	Fuse Wiring, terminals or connectors SDARS module	Go to Pinpoint Test M .
The heating ventilation air conditioning (HVAC) module does not respond to the scan tool	Fuse Wiring, terminals or connectors HVAC module	Go to Pinpoint Test N .
The accessory protocol interface module (APIM) does not respond to the scan tool	Fuse Wiring, terminals or connectors APIM	Go to Pinpoint Test O .
The parking aid module (PAM) does not respond to the scan tool	Fuse Wiring, terminals or connectors Parking aid module	Go to Pinpoint Test P .
No power to the scan tool	Fuse Wiring, terminals or connectors Scan tool	Go to Pinpoint Test Q .
Intermittent no high speed controller area network (HS-CAN) communication, one or more modules are not responding during network test	Wiring, terminals or connectors	Go to Pinpoint Test R .
No high speed controller area network (HS-CAN) communication, all modules are not responding	Wiring, terminals or connectors ABS module APIM 4X4 control module (if equipped) IC OCSM PCM RCM SECM	Go to Pinpoint Test S .
Intermittent no medium speed controller area network (MS-CAN) communication, one or more modules are not responding during network test	Wiring, terminals or connectors	Go to Pinpoint Test T .
No medium speed controller area network (MS-CAN) communication, all modules are not responding	Wiring, terminals or connectors ACM RETM (if equipped) SDARS module (if equipped) DSM (if equipped) HVAC module (if equipped) SJB IC	Go to Pinpoint Test U .

Symptom Chart

Pinpoint Test A: The PCM Does Not Respond To The Scan Tool

Refer to appropriate SYSTEM SYSTEM WIRING DIAGRAMS articleS article, Module Communications Network for schematic and connector information.

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Electronic Engine Controls - 3.5L for schematic and connector information.

Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Note. Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the Pinpoint Test.

Scheme 3

Scheme 3: PINPOINT TEST A: THE PCM DOES NOT RESPOND TO THE SCAN TOOL

Scheme 4

Scheme 5

Scheme 6

A1 CHECK THE DATA LINK CONNECTOR (DLC) PINS FOR DAMAGE Key in OFF position. Disconnect the scan tool cable from the DLC. Inspect DLC pins 6 and 14 for damage. Are DLC pins 6 and 14 OK? YES : Go to A2 . NO : REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
A2 POWERTRAIN CONTROL/EMISSIONS DIAGNOSIS (PC/ED) PINPOINT TEST QA VERIFICATION Verify that PC/ED pinpoint test QA has been carried out. Has pinpoint test QA been carried out? YES : Go to A3 . NO : REFER to the «Introduction - Gasoline Engines»(ref-291242) article, pinpoint test QA to diagnose no communication with the PCM.
A3 CHECK THE HS-CAN TERMINATION RESISTANCE Key in OFF position. NOTE: Failure to disconnect the battery will result in false resistance readings. Disconnect the battery ground cable. Disconnect the scan tool from the DLC. Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Is the resistance between 54 and 66 ohms? YES : Go to A5 . NO : Go to A4 .
A4 CHECK THE CAN CIRCUITS BETWEEN THE DLC AND THE PCM FOR AN OPEN Disconnect: PCM C175b Measure the resistance between the PCM C175b-2, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the PCM C175b-3, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Are the resistances less than 5 ohms? YES : Go to A5 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
A5 CHECK FOR CORRECT PCM OPERATION Disconnect all the PCM connectors. Check for: corrosion damaged pins pushed-out pins Connect all the PCM connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? YES : INSTALL a new PCM. REFER to «ELECTRONIC ENGINE CONTROLS»(ref-293501) article. CONNECT all the modules. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CONNECT all the modules. CLEAR the DTCs. REPEAT the network test with the scan tool.

Pinpoint Test B: The ABS Module Does Not Respond To The Scan Tool

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Module Communications Network for schematic and connector information.

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Vehicle Dynamic Systems for schematic and connector information.

Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Scheme 7

Scheme 7: PINPOINT TEST B: THE ABS MODULE DOES NOT RESPOND TO THE SCAN TOOL

Scheme 8

Scheme 9

Scheme 10

B1 CHECK THE VOLTAGE SUPPLY CIRCUIT FOR AN OPEN Key in OFF position. Disconnect: ABS Module C135 Key in ON position. Measure the voltage between the ABS module C135-32, circuit CBB38 (GY/BU), harness side and ground. Is the voltage greater than 10 volts? YES : Go to B2 . NO : VERIFY the smart junction box (SJB) fuse 38 (10A) is OK. If OK, REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
B2 CHECK THE GROUND CIRCUIT FOR AN OPEN Key in OFF position. Measure the resistance between the ABS module C135-38, circuit GD120 (BK/GN), harness side and ground. Is the resistance less than 5 ohms? YES : Go to B3 . NO : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
B3 CHECK THE HS-CAN CIRCUITS BETWEEN THE DATA LINK CONNECTOR (DLC) AND THE ABS MODULE FOR AN OPEN Measure the resistance between the ABS module C135-26, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the ABS module C135-14, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Are the resistances less than 5 ohms? YES : Go to B4 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
B4 CHECK FOR CORRECT ABS MODULE OPERATION Disconnect the ABS module connector. Check for: corrosion damaged pins pushed-out pins Connect the ABS module connector and make sure it seats correctly. Operate the system and verify the concern is still present. Is the concern still present? YES : INSTALL a new ABS module. REFER to «VEHICLE DYNAMIC SYSTEMS»(ref-293517) article. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the network test with the scan tool.

Pinpoint Test C: The Instrument Cluster (IC) Does Not Respond To The Scan Tool

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Module Communications Network for schematic and connector information.

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Instrument Cluster for schematic and connector information.

Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Scheme 11

Scheme 12

Scheme 13

Scheme 14

C1 CHECK THE HS-CAN TERMINATION RESISTANCE Key in OFF position. NOTE: Failure to disconnect the battery will result in false resistance readings. Disconnect the battery ground cable. Disconnect the scan tool cable from the data link connector (DLC). Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Is the resistance between 54 and 66 ohms? YES : Go to C2 . NO : Go to C4 .
C2 CHECK THE IC VOLTAGE SUPPLY CIRCUIT FOR AN OPEN Disconnect: IC C220 Connect the battery ground cable. Key in ON position. Measure the voltage between the IC, harness side and ground as follows: Connector-Pin Circuit C220-1 SBP26 (YE/RD) C220-14 CBP29 (WH/VT) Are the voltages greater than 10 volts? YES : Go to C3 . NO : VERIFY the smart junction box (SJB) fuses 26 (10A) or 29 (5A) are OK. If OK, REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
C3 CHECK THE IC GROUND CIRCUITS Key in OFF position. Measure the resistance between the IC, harness side and ground as follows: Connector-Pin Circuit C220-6 GD111 (BK/BU) C220-20 GD113 (BK/YE) Are the resistances less than 5 ohms? YES : Go to C4 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
C4 CHECK THE HS-CAN CIRCUITS BETWEEN THE DATA LINK CONNECTOR (DLC) AND THE IC FOR AN OPEN Measure the resistance between the IC C220-7, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the IC C220-8, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Are the resistances less than 5 ohms? YES : Go to C5 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
C5 CHECK THE MS-CAN CIRCUITS BETWEEN THE DLC AND THE IC FOR AN OPEN Measure the resistance between the IC C220-4, circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06 (GY/OG), harness side. Measure the resistance between the IC C220-5, circuit VDB07 (VT/OG), harness side and the DLC C251-11, circuit VDB07 (VT/OG), harness side. Are the resistances less than 5 ohms? YES : Go to C6 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
C6 CHECK FOR CORRECT IC OPERATION Disconnect the IC connector. Check for: corrosion damaged pins pushed-out pins Connect the IC connector and make sure it seats correctly. Operate the system and verify the concern is still present. Is the concern still present? YES : INSTALL a new IC. REFER to «INSTRUMENT CLUSTER (IC), MESSAGE CENTER, AND WARNING CHIMES»(ref-293475) article. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the network test with the scan tool.

Pinpoint Test D: The 4X4 Control Module Does Not Respond To The Scan Tool

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Module Communications Network for schematic and connector information.

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, All Wheel Drive (AWD) for schematic and connector information.

Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Scheme 15

Scheme 15: PINPOINT TEST D: THE 4X4 CONTROL MODULE DOES NOT RESPOND TO THE SCAN TOOL

Scheme 16

Scheme 17

Scheme 18

D1 CHECK THE VOLTAGE SUPPLY CIRCUIT FOR AN OPEN Key in OFF position. Disconnect: 4X4 Control Module C281 Key in ON position. Measure the voltage between the 4X4 control module C281-4, circuit CBP34 (VT/BN), harness side and ground; and between the 4X4 control module C281-5, circuit SBP11 (BU/RD), harness side and ground. Is the voltage greater than 10 volts? YES : Go to D2 . NO : VERIFY the smart junction box (SJB) fuses 34 (5A) and 11 (10A) are OK. If OK, REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
D2 CHECK THE GROUND CIRCUIT FOR AN OPEN Key in OFF position. Measure the resistance between the 4X4 control module C281-15, circuit GD148 (BK/YE), harness side and ground. Is the resistance less than 5 ohms? YES : Go to D3 . NO : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
D3 CHECK THE HS-CAN CIRCUITS BETWEEN THE DATA LINK CONNECTOR (DLC) AND THE 4X4 CONTROL MODULE FOR AN OPEN Measure the resistance between the 4X4 control module C281-3, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the 4X4 control module C281-11, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Are the resistances less than 5 ohms? YES : Go to D4 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
D4 CHECK FOR CORRECT 4X4 CONTROL MODULE OPERATION Disconnect the 4X4 control module connector. Check for: corrosion damaged pins pushed-out pins Connect the 4X4 control module connector and make sure it seats correctly. Operate the system and verify the concern is still present. Is the concern still present? YES : INSTALL a new 4X4 control module. REFER to «FOUR WHEEL DRIVE (4WD) SYSTEMS»(ref-293521) article. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the network test with the scan tool.

Pinpoint Test E: The Restraints Control Module (RCM) Does Not Respond To The Scan Tool

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Module Communications Network for schematic and connector information.

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Supplemental Restraint System for schematic and connector information.

WARNING

Never probe the electrical connectors on air bag, safety canopy or side air curtain modules. Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

WARNING

Never probe the electrical connectors on safety belt buckle/retractor pretensioners or adaptive load limiting retractors. Failure to follow this instruction may result in the accidental deployment of the safety belt pretensioners or adaptive load limiting retractors, which increases the risk of serious personal injury or death.

Note. The supplemental restraint system (SRS) must be fully operational and free of faults before releasing the vehicle to the customer.

Note. Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the Pinpoint Test.

Scheme 19

Scheme 20

Scheme 21

E1 CHECK THE RCM CONNECTION Key in OFF position. Depower the SRS. Refer to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-293481) article. Disconnect: RCM C310a Disconnect: RCM C310b Inspect the RCM connector for damaged, pushed out or corroded pins. Are RCM C310a pin 24, and RCM C310b pins 17 and 18 OK? YES : Go to E2 . NO : REPAIR the RCM connector pins as necessary. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-293481) article. CLEAR the DTCs. REPEAT the network test with the scan tool.
E2 CHECK THE VOLTAGE SUPPLY CIRCUITS FOR AN OPEN NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector. Repower the SRS. Refer to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-293481) article. Key in ON position. Measure the voltage between the RCM C310a-24, circuit CBP32 (GN/VT), harness side and ground. Is the voltage greater than 10 volts? YES : Go to E3 . NO : VERIFY the smart junction box (SJB) fuse 32 (10A) is OK. If OK, REPAIR the circuit. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-293481) article. CLEAR the DTCs. REPEAT the network test with the scan tool.
E3 CHECK THE RCM CASE GROUND Key in OFF position. Measure the resistance between the RCM case and a good chassis ground. Is the resistance less than 5 ohms? YES : Go to E4 . NO : REPAIR the RCM case ground as necessary. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-293481) article. CLEAR the DTCs. REPEAT the network test with the scan tool.
E4 CHECK THE HIGH SPEED CAN CIRCUITS BETWEEN THE DATA LINK CONNECTOR (DLC) AND THE RCM FOR AN OPEN Measure the resistance between the RCM C310b-18, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the RCM C310b-17, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Are the resistances less than 5 ohms? YES : Go to E5 . NO : REPAIR the circuit in question. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-293481) article. CLEAR the DTCs. REPEAT the network test with the scan tool.
E5 CHECK FOR CORRECT RCM OPERATION Disconnect all the RCM connectors. Check for: corrosion damaged pins pushed-out pins Connect all the RCM connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? YES : INSTALL a new RCM. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-293481) article. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-293481) article. CLEAR the DTCs. REPEAT the network test with the scan tool.

Pinpoint Test F: The Occupant Classification System Module (OCSM) Does Not Respond With the Scan Tool

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Module Communications Network for schematic and connector information.

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Supplemental Restraint System for schematic and connector information.

Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Scheme 22

Scheme 22: PINPOINT TEST F: THE OCCUPANT CLASSIFICATION SYSTEM MODULE (OCSM) DOES NOT RESPOND WITH THE SCAN TOO

Scheme 23

Scheme 24

Scheme 25

F1 CHECK THE ACM VOLTAGE SUPPLY CIRCUITS FOR AN OPEN Key in OFF position. Disconnect: OCSM C3285 Key in ON position. Measure the voltage between the OCSM C3285-1, circuit CBP46 (WH/BU), harness side and ground. Is the voltage greater than 10 volts? YES : Go to F2 . NO : VERIFY the smart junction box (SJB) fuse 46 (7.5A) is OK. If OK, REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
F2 CHECK THE GROUND CIRCUIT FOR AN OPEN Key in OFF position. Measure the resistance between the OCSM C3285-14, circuit GD133 (BK), harness side and ground. Is the resistance less than 5 ohms? YES : Go to F3 . NO : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
F3 CHECK THE HS-CAN CIRCUITS BETWEEN THE DATA LINK CONNECTOR (DLC) AND THE OCSM FOR AN OPEN Measure the resistance between the OCSM C3285-18, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the OCSM C3285-9, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Are the resistances less than 5 ohms? YES : Go to F4 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
F4 CHECK FOR CORRECT OCSM OPERATION Disconnect the OCSM connector. Check for: corrosion damaged pins pushed-out pins Connect the OCSM connector and make sure it seats correctly. Operate the system and verify the concern is still present. Is the concern still present? YES : INSTALL a new OCSM. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-293481) article. REPEAT the network test with the scan tool. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the network test with the scan tool.

Pinpoint Test G: The Steering Effort Control Module (SECM) Does Not Respond To The Scan Tool

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Module Communications Network for schematic and connector information.

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Power Steering Controls for schematic and connector information.

Note. Use the correct probe adapter(s) when taking measurements. Failure to use the correct probe adapter(s) may damage the connector.

Scheme 26

Scheme 26: PINPOINT TEST G: THE STEERING EFFORT CONTROL MODULE (SECM) DOES NOT RESPOND TO THE SCAN TOOL

Scheme 27

Scheme 28

Scheme 29

G1 CHECK THE SECM VOLTAGE SUPPLY CIRCUITS FOR AN OPEN Key in OFF position. Disconnect: SECM C2368a Key in ON position. Measure the voltage between the steering effort control module (SECM) C2368a-11, circuit SBP13 (GY/RD), harness side and ground; and between the steering effort control module (SECM) C2368a-3, circuit CBP35 (YE/GY), harness side and ground. Are the voltages greater than 10 volts? YES : Go to G2 . NO : VERIFY the smart junction box (SJB) fuses 13 (5A) or 35 (10A), are OK. If OK, REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
G2 CHECK THE SECM GROUND CIRCUIT FOR AN OPEN Key in OFF position. Measure the resistance between the steering effort control module (SECM) C2368a-14, circuit GD148 (BK/YE), harness side and ground. Is the resistance less than 5 ohms? YES : Go to G3 . NO : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
G3 CHECK THE HS-CAN CIRCUITS BETWEEN THE SECM AND THE DATA LINK CONNECTOR (DLC) FOR AN OPEN Measure the resistance between the steering effort control module (SECM) C2368a-10, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the steering effort control module (SECM) C2368a-9, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Are the resistances less than 5 ohms? YES : Go to G4 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
G4 CHECK FOR CORRECT SECM OPERATION Disconnect all the steering effort control module (SECM) connectors. Check for: corrosion damaged pins pushed-out pins Connect all the steering effort control module (SECM) connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? YES : INSTALL a new steering effort control module (SECM). REFER to «STEERING SYSTEM - GENERAL INFORMATION»(ref-293459) article . CLEAR the DTCs. REPEAT the network test with the scan tool. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the network test with the scan tool.

Pinpoint Test H: The Smart Junction Box (SJB) Does Not Respond To The Scan Tool

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Grounds for schematic and connector information.

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Power Distribution/SJB for schematic and connector information.

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Module Communications Network for schematic and connector information.

Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Scheme 30

Scheme 30: PINPOINT TEST H: THE SMART JUNCTION BOX (SJB) DOES NOT RESPOND TO THE SCAN TOOL

Scheme 31

Scheme 32

H1 CHECK THE SJB VOLTAGE SUPPLY CIRCUIT FOR AN OPEN Key in ON position. NOTE: Measurements are taken with the fuses installed. Measure the voltage between the SJB fuse 5 (10A) and ground. Is the voltage greater than 10 volts? YES : Go to H2 . NO : VERIFY the smart junction box (SJB) fuse 5 (10A) is OK. If OK, go to H4 .
H2 CHECK THE SJB GROUND CIRCUITS FOR AN OPEN Key in OFF position. Disconnect: SJB C2280d Measure the resistance between the SJB, harness side and ground, as follows: SJB Connector-Pin Circuit C2280d-8 GD133 (BK) C2280d-12 GD133 (BK) Are the resistances less than 5 ohms? YES : Go to H3 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
H3 CHECK THE MS-CAN CIRCUITS BETWEEN THE SJB AND THE DATA LINK CONNECTOR (DLC) FOR AN OPEN Disconnect: SJB C2280b Measure the resistance between the SJB C2280b-37, circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06 (GY/OG), harness side. Measure the resistance between the SJB C2280b-38, circuit VDB07 (VT/OG), harness side and the DLC C251-11, circuit VDB07 (VT/OG), harness side. Are the resistances less than 5 ohms? YES : Go to H4 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
H4 CHECK FOR CORRECT SJB OPERATION Disconnect all the SJB connectors. Check for: corrosion damaged pins pushed-out pins Connect all the SJB connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? YES : INSTALL a new SJB. REFER to «MULTIFUNCTION ELECTRONIC MODULES»(ref-293473) article. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the network test with the scan tool.

Pinpoint Test I: The Audio Control Module (ACM) Does Not Respond To The Scan Tool

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Module Communications Network for schematic and connector information.

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Audio System/Navigation for schematic and connector information.

Note. Use the correct probe adapter(s) when taking measurements. Failure to use the correct probe adapter(s) may damage the connector.

Scheme 33

Scheme 33: PINPOINT TEST I: THE AUDIO CONTROL MODULE (ACM) DOES NOT RESPOND TO THE SCAN TOOL

Scheme 34

Scheme 35

Scheme 36

I1 CHECK THE ACM VOLTAGE SUPPLY CIRCUITS FOR AN OPEN Key in OFF position. Disconnect: ACMC240a Key in ON position. Measure the voltage between the ACM C240a-1, circuit SPB39 (WH/RD) , harness side and ground. Is the voltage greater than 10 volts? YES : Go to I2 . NO : VERIFY the smart junction box (SJB) fuse 39 (20A) is OK. If OK, REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
I2 CHECK THE ACM GROUND CIRCUIT FOR AN OPEN Key in OFF position. Measure the resistance between the ACM C240a-13, circuit GD114 (BK/BU), harness side and ground. Is the resistance less than 5 ohms? YES : Go to I3 . NO : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
I3 CHECK THE MS-CAN CIRCUITS BETWEEN THE ACM AND THE DATA LINK CONNECTOR (DLC) FOR AN OPEN Disconnect: ACMC240c Measure the resistance between the ACM C240c-15, circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06 (GY/OG), harness side. Measure the resistance between the ACM C240c-16, circuit VDB07 (VT/OG), harness side and the DLC C251-11, circuit VDB07 (VT/OG), harness side. Are the resistances less than 5 ohms? YES : Go to I4 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
I4 CHECK FOR CORRECT ACM OPERATION Disconnect all of the ACM connectors. Check for: corrosion damaged pins pushed-out pins Connect all of the ACM connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? YES : INSTALL a new ACM. REFER to «INFORMATION AND ENTERTAINMENT SYSTEMS»(ref-293482) article. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the network test with the scan tool.

Pinpoint Test J: The Driver Seat Module (DSM) Does Not Respond To The Scan Tool

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Module Communications Network for schematic and connector information.

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Memory Seats for schematic and connector information.

Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Scheme 37

Scheme 37: PINPOINT TEST J: THE DRIVER SEAT MODULE (DSM) DOES NOT RESPOND TO THE SCAN TOOL

Scheme 38

Scheme 39

Scheme 40

Scheme 41

Scheme 42

J1 CHECK THE DSM VOLTAGE SUPPLY CIRCUITS FOR AN OPEN Key in OFF position. Disconnect: DSM C341a Disconnect: DSM C341b Measure the voltage between the DSM C341a-1, circuit SBB32 (VT/RD), harness side and ground. Measure the voltage between the DSM C341b-1, circuit SBP12 (GN/RD), harness side and ground. Are the voltages greater than 10 volts? YES : Go to J2 . NO : VERIFY the battery junction box (BJB) fuse 32 (30A) or the SJB fuse 12 (7.5) are OK. If OK, REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
J2 CHECK THE DSM GROUND CIRCUIT FOR AN OPEN Measure the resistance between the DSM C341a-2, circuit GD147 (BK/VT), harness side and ground. Measure the resistance between the DSM C341b-24, circuit GD147 (BK/VT), harness side and ground. Are the resistances less than 5 ohms? YES : Go to J3 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
J3 CHECK THE MS-CAN CIRCUITS BETWEEN THE DATA LINK CONNECTOR (DLC) AND THE DSM FOR AN OPEN Key in OFF position. Disconnect: DSM C241d Measure the resistance between the DSM C341d-10, circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06 (GY/OG), harness side. Measure the resistance between the DSM C341d-9, circuit VDB07 (VT/OG), harness side and the DLC C251-11, circuit VDB07 (VT/OG), harness side. Are the resistances less than 5 ohms? YES : Go to J4 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
J4 CHECK FOR CORRECT DSM OPERATION Disconnect all the DSM connectors. Check for: corrosion damaged pins pushed-out pins Connect all the DSM connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? YES : INSTALL a new DSM. REFER to «MULTIFUNCTION ELECTRONIC MODULES»(ref-293473) article. REPEAT the network test with the scan tool. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the network test with the scan tool.

Pinpoint Test K: The Rear Entertainment Module (RETM) Does Not Respond To The Scan Tool

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Module Communications Network for schematic and connector information.

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Audio System/Navigation for schematic and connector information.

Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Scheme 43

Scheme 43: PINPOINT TEST K: THE REAR ENTERTAINMENT MODULE (RETM) DOES NOT RESPOND TO THE SCAN TOOL

Scheme 44

Scheme 45

Scheme 46

K1 CHECK THE VOLTAGE SUPPLY CIRCUIT FOR AN OPEN Key in OFF position. Disconnect: RETM C9029 Measure the voltage between the RETM C9029-16, circuit SBP03 (BU/RD), harness side and ground. Is the voltage greater than 10 volts? YES : Go to K2 . NO : VERIFY the smart junction box (SJB) fuse 3 (15A) is OK. If OK, REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
K2 CHECK THE GROUND CIRCUIT FOR AN OPEN Measure the resistance between the RETM C9029-1 circuit GD103 (BK/BU), harness side and ground. Is the resistance less than 5 ohms? YES : Go to K3 . NO : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
K3 CHECK THE MS-CAN CIRCUITS BETWEEN THE DATA LINK CONNECTOR (DLC) AND THE RETM FOR AN OPEN Measure the resistance between the RETM C9029-8, circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06 (GY/OG), harness side. Measure the resistance between the RETM C9029-7, circuit VDB07 (VT/OG), harness side and the DLC C251-11, circuit VDB07 (VT/OG), harness side. Are the resistances less than 5 ohms? YES : Go to K4 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
K4 CHECK FOR CORRECT RETM OPERATION Disconnect the RETM connector. Check for: corrosion damaged pins pushed-out pins Connect the RETM connector and make sure it seats correctly. Operate the system and verify the concern is still present. Is the concern still present? YES : INSTALL a new RETM. REFER to «INFORMATION AND ENTERTAINMENT SYSTEMS»(ref-293482) article. REPEAT the network test with the scan tool. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the network test with the scan tool.

Pinpoint Test L: The Liftgate/Trunk Module (LTM) Does Not Respond With The Scan Tool

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Module Communications Network for schematic and connector information.

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Power Liftgate for schematic and connector information.

PINPOINT TEST L: THE LIFTGATE/TRUNK MODULE (LTM) DOES NOT RESPOND TO THE SCAN TOOL

Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Scheme 47

Scheme 47: PINPOINT TEST L: THE LIFTGATE/TRUNK MODULE (LTM) DOES NOT RESPOND TO THE SCAN TOOL

Scheme 48

Scheme 49

Scheme 50

L1 CHECK THE VOLTAGE SUPPLY CIRCUIT FOR AN OPEN Key in OFF position. Disconnect: LTM C4174b Key in ON position. Measure the voltage between the LTM C4174b-4, circuit SBB29 (GY/RD), harness side and ground; measure the voltage between the LTM C4174b-9, circuit SBP14 (BN/RD) harness side and ground. Are the voltages greater than 10 volts? YES : Go to L2 . NO : VERIFY the smart junction box (SJB) fuse 14 (10A) or BJB fuse 29 (30A) is OK. If OK, REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
L2 CHECK THE GROUND CIRCUIT FOR AN OPEN Key in OFF position. Measure the resistance between the LTM C4174b-1, circuit GD147 (BK/VT), harness side and ground. Is the resistance less than 5 ohms? YES : Go to L3 . NO : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
L3 CHECK THE MS-CAN CIRCUITS BETWEEN THE DATA LINK CONNECTOR (DLC) AND THE LTM FOR AN OPEN Disconnect: LTM C4174a Measure the resistance between the LTM C4174a-11, circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06 (GY/OG), harness side. Measure the resistance between the LTM C4174a-10, circuit VDB07 (VT/OG), harness side and the DLC C251-11, circuit VDB07 (VT/OG), harness side. Are the resistances less than 5 ohms? YES : Go to L4 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
L4 CHECK FOR CORRECT LTM OPERATION Disconnect the LTM connector. Check for: corrosion damaged pins pushed-out pins Connect the LTM connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? YES : INSTALL a new LTM. REFER to «BODY CLOSURES»(ref-293463) article. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the network test with the scan tool.

Pinpoint Test M: The Satellite Digital Audio Receiver System (SDARS) Module Does Not Respond To The Scan Tool

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Module Communications Network for schematic and connector information.

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Audio System/Navigation for schematic and connector information.

Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Scheme 51

Scheme 51: PINPOINT TEST M: THE SATELLITE DIGITAL AUDIO RECEIVER SYSTEM (SDARS) MODULE DOES NOT RESPOND TO THE

Scheme 52

Scheme 53

Scheme 54

M1 CHECK THE VOLTAGE SUPPLY CIRCUIT FOR AN OPEN Key in OFF position. Disconnect: SDARS module C4344 Measure the voltage between the SDARS module C4344-9, circuit SBP03 (BU/RD), harness side and ground. Is the voltage greater than 10 volts? YES : Go to M2 . NO : VERIFY the smart junction box (SJB) fuse 3 (15A) is OK. If OK, REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
M2 CHECK THE GROUND CIRCUIT FOR AN OPEN Measure the resistance between the SDARS module C4344-3, circuit GD103 (BK/BU), harness side and ground. Is the resistance less than 5 ohms? YES : Go to M3 . NO : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
M3 CHECK THE MS-CAN CIRCUITS BETWEEN THE DATA LINK CONNECTOR (DLC) AND THE SDARS MODULE FOR AN OPEN Measure the resistance between the SDARS module C4344-1, circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06 (GY/OG), harness side. Measure the resistance between the SDARS module C4344-7, circuit VDB07 (VT/OG), harness side and the DLC C251-11, circuit VDB07 (VT/OG), harness side. Are the resistances less than 5 ohms? YES : Go to M4 . NO : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
M4 CHECK FOR CORRECT SDARS module OPERATION Disconnect the SDARS module connector. Check for: corrosion damaged pins pushed-out pins Connect the SDARS module connector and make sure it seats correctly. Operate the system and verify the concern is still present. Is the concern still present? YES : INSTALL a new SDARS module. REFER to «INFORMATION AND ENTERTAINMENT SYSTEMS»(ref-293482) article. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the network test with the scan tool.

Pinpoint Test N: The Heating Ventilation Air Conditioning (HVAC) Module Does Not Respond To The Scan Tool

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Module Communications Network for schematic and connector information.

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Manual Climate Control System for schematic and connector information.

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Automatic Climate Control System for schematic and connector information.

Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Scheme 55

Scheme 55: PINPOINT TEST N: THE HEATING VENTILATION AIR CONDITIONING (HVAC) MODULE DOES NOT RESPOND TO THE SCAN

Scheme 56

Scheme 57

Scheme 58

N1 CHECK THE VOLTAGE SUPPLY CIRCUITS FOR AN OPEN Key in OFF position. Disconnect: HVAC-EATC Module C228a or HVAC-EMTC module C2357a Key in ON position. Measure the voltage between the HVAC-EATC module C228a-12 or HVAC-EMTC module C2357a-12, circuit CBP37 (WH), harness side and ground; and between the HVAC-EATC module C228a-13 or HVAC-EMTC module C2357a-13, circuit SBP15 (WH/RD), harness side and ground. Are the voltages greater than 10 volts? YES : Go to N2 . NO : VERIFY the SJB fuses 15 (10A) or 37 (10A) are OK. If OK, REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
N2 CHECK THE GROUND CIRCUIT FOR AN OPEN Key in OFF position. Measure the resistance between the HVAC-EATC module C228a-23 or HVAC-EMTC module C2357a-23, circuit GD111 (BK/BU), harness side and ground. Is the resistance less than 5 ohms? YES : Go to N3 . NO : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
N3 CHECK THE MS-CAN CIRCUITS BETWEEN THE DLC AND THE HVAC MODULE FOR AN OPEN Measure the resistance between the HVAC-EATC module C228a-25 or HVAC-EMTC module C2357a-25, circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06 (GY/OG), harness side. Measure the resistance between the HVAC-EATC module C228a-26 or HVAC-EMTC module C2357a-26, circuit VDB07 (VT/OG), harness side and the DLC C251-11, circuit VDB07 (VT/OG), harness side. Are the resistances less than 5 ohms? YES : Go to N4 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
N4 CHECK FOR CORRECT HVAC MODULE OPERATION Disconnect all the HVAC module connectors. Check for: corrosion damaged pins pushed-out pins Connect all the HVAC module connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? YES : INSTALL a new HVAC module. REFER to «CLIMATE CONTROL»(ref-293487) article. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the network test with the scan tool.

Pinpoint Test O: The Accessory Protocol Interface Module (APIM) Does Not Respond To The Scan Tool

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Module Communications Network for schematic and connector information.

Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Scheme 59

Scheme 59: PINPOINT TEST O: THE ACCESSORY PROTOCOL INTERFACE MODULE (APIM) DOES NOT RESPOND TO THE SCAN TOOL

Scheme 60

Scheme 61

Scheme 62

Scheme 63

Scheme 64

O1 CHECK THE APIM VOLTAGE SUPPLY CIRCUIT FOR AN OPEN Disconnect: APIM C3342 Key in ON position. Measure the voltage between the APIM C3342-1, circuit SBP03 (BU/RD), harness side and ground. Is the voltage greater than 10 volts? YES : Go to O2 . NO : VERIFY the smart junction box (SJB) fuse 13 (15A) is OK. If OK, REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
O2 CHECK THE APIM GROUND CIRCUITS FOR AN OPEN Key in OFF position. Measure the resistance between the APIM C3342-37, circuit GD103 (BK/BU), harness side and ground; and between the APIM C3342-38, circuit GD103 (BK/BU), harness side and ground. Are the resistances less than 5 ohms? YES : Go to O3 . NO : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
O3 CHECK THE HS-CAN CIRCUITS BETWEEN THE APIM AND THE DATA LINK CONNECTOR (DLC) FOR AN OPEN Measure the resistance between the APIM C3342-53, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the APIM C3342-54, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Are the resistances less than 5 ohms? YES : Go to O4 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
O4 CHECK THE MS-CAN CIRCUITS BETWEEN THE DLC AND THE APIM FOR AN OPEN Measure the resistance between the APIM C3342-16, circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06 (GY/OG), harness side. Measure the resistance between the APIM C3342-17, circuit VDB07 (VT/OG), harness side and the DLC C251-11, circuit VDB07 (VT/OG), harness side. Are the resistances less than 5 ohms? YES : Go to O5 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
O5 CHECK FOR CORRECT APIM OPERATION Disconnect all the APIM connectors. Check for: corrosion damaged pins pushed-out pins Connect all the APIM connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? YES : INSTALL a new APIM. REFER to «INFORMATION AND ENTERTAINMENT SYSTEMS»(ref-293482) article. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the network test with the scan tool.

Pinpoint Test P: The Parking Aid Module (PAM) Does Not Respond To The Scan Tool

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Module Communications Network for schematic and connector information.

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Parking Aid for schematic and connector information.

Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Scheme 65

Scheme 65: PINPOINT TEST P: THE PARKING AID MODULE (PAM) DOES NOT RESPOND TO THE SCAN TOOL

Scheme 66

Scheme 67

P1 CHECK THE VOLTAGE SUPPLY CIRCUIT FOR AN OPEN Key in OFF position. Disconnect: PAM C3267 Key in ON position. Measure the voltage between the PAM C3267-1, circuit CBP35 (YE/GY), harness side and ground. Is the voltage greater than 10 volts? YES : Go to P2 . NO : VERIFY the smart junction box (SJB) fuse 35 (10A) is OK. If OK, REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
P2 CHECK THE GROUND CIRCUIT FOR AN OPEN Key in OFF position. Measure the resistance between the PAM C3267-4, circuit GD147 (BK/YE) or GD148 (BK/YE), harness side and ground. Is the resistance less than 5 ohms? YES : Go to P3 . NO : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
P3 CHECK ISO 9141 CIRCUIT VDB10 (GY) FOR AN OPEN Measure the resistance between the PAM C3267-8, circuit VDB10 (GY), harness side and the DLC C251-7, circuit VDB10 (GY), harness side. Is the resistance less than 5 ohms? YES : Go to P4 . NO : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
P4 CHECK FOR CORRECT PAM OPERATION Disconnect the PAM connector. Check for: corrosion damaged pins pushed-out pins Connect the PAM connector and make sure it seats correctly. Operate the system and verify the concern is still present. Is the concern still present? YES : INSTALL a new PAM. REFER to «PARKING AID»(ref-293526) article. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the network test with the scan tool.

Pinpoint Test Q: No Power To The Scan Tool

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Module Communications Network for schematic and connector information.

PINPOINT TEST R: INTERMITTENT NO HIGH SPEED CONTROLLER AREA NETWORK (HS-CAN) COMMUNICATION, ONE OR MORE MODULES ARE NOT RESPONDING DURING NETWORK TEST

Note. Various modules will set network DTCs during this test procedure. Clear the DTCs from all modules after the diagnostic procedure is complete.

Scheme 68

Scheme 69

R1 CHECK THE DATA LINK CONNECTOR (DLC) PINS FOR DAMAGE Key in OFF position. Disconnect the scan tool cable from the DLC. Inspect DLC pins 6 and 14 for damage. Are DLC pins 6 and 14 OK? YES : Go to R2 . NO : REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
R2 CHECK THE HS-CAN TERMINATION RESISTANCE Key in OFF position. NOTE: Failure to disconnect the battery will result in false resistance readings. Disconnect the battery ground cable. Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Is the resistance between 54 and 66 ohms? YES : Go to R3 . NO : Go to «Pinpoint Test Q»(ref-293472-S19081825972008080700000) .
R3 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and ground; and between the DLC C251-14, circuit VDB05 (WH), harness side and ground. Are the resistances greater than 1,000 ohms? YES : Go to R4 . NO : Go to «Pinpoint Test Q»(ref-293472-S19081825972008080700000) .
R4 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO VOLTAGE Connect the battery ground cable. Key in ON position. Measure the voltage between the DLC C251-6, circuit VDB04 (WH/BU), harness side and ground; and between the DLC C251-14, circuit VDB05 (WH), harness side and ground. Is the voltage greater than 6 volts? YES : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : Go to R5 .
R5 CHECK FOR RESTORED COMMUNICATION WITH THE PCM DISABLED NOTE: An integrated diagnostic system (IDS) session must be established prior to disabling the PCM in this test step. If the PCM has failed communication during multiple attempts to identify the vehicle, first identify the vehicle manually by entering a PCM part number, calibration number or tear tag when prompted by IDS. NOTE: When a vehicle is manually identified by a PCM part number, calibration number or tear tag, the IDS will not automatically run a network test. The network test must be manually selected and run. NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results. Disconnect: Battery Junction Box (BJB) Fuses 23 (10A), 47 (15A) and 39 (10A) Enter the following diagnostic mode on the diagnostic tool: Network Test Repeat the network test. Do all other modules pass the network test? YES : INSTALL the removed fuses. Go to «Pinpoint Test A»(ref-293472-S40126589092008080700000) . NO : INSTALL the removed fuses. Go to R6 .
R6 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE ABS MODULE DISABLED NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results. Disconnect: Smart Junction Box (SJB) Fuse 38 (10A) Enter the following diagnostic mode on the diagnostic tool: Network Test Repeat the network test. Do all other modules pass the network test? YES : INSTALL the removed fuse. Go to «Pinpoint Test B»(ref-293472-S26139716982008080700000) . NO : INSTALL the removed fuse. Go to R7 .
R7 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE SECM DISABLED NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results. Disconnect: SJB Fuse 13 (5A) and 35 (10A) Enter the following diagnostic mode on the diagnostic tool: Network Test Repeat the network test. Do all other modules pass the network test? YES : INSTALL the removed fuses. Go to «Pinpoint Test G»(ref-293472-S32915601462008080700000) . NO : INSTALL the removed fuses. Go to R8 .
R8 VERIFY VEHICLE EQUIPMENT - 4X4 CONTROL MODULE NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results. Inspect the vehicle for 4X4. Is the vehicle equipped with 4X4? YES : Go to R9 . NO : Go to R10 .
R9 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE 4X4 CONTROL MODULE DISABLED NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results. Disconnect: SJB Fuses 34 (5A) and 11 (10A) Enter the following diagnostic mode on the diagnostic tool: Network Test Repeat the network test. Do all other modules pass the network test? YES : INSTALL the removed fuses. Go to «Pinpoint Test D»(ref-293472-S01810878892008080700000) . NO : INSTALL the removed fuses. Go to R10 .
R10 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE IC DISABLED NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results. Disconnect: SJB Fuse 26 (10A) and 29 (5A) Enter the following diagnostic mode on the diagnostic tool: Network Test Repeat the network test. Do all other modules pass the network test? YES : INSTALL the removed fuses. Go to «Pinpoint Test C»(ref-293472-S27088636492008080700000) . NO : INSTALL the removed fuses. Go to R11 .
R11 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE RCM DISABLED NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results. Disconnect: SJB Fuse 32 (10A) Enter the following diagnostic mode on the diagnostic tool: Network Test Repeat the network test. Do all other modules pass the network test? YES : INSTALL the removed fuse. Go to «Pinpoint Test E»(ref-293472-S28967064242008080700000) . NO : INSTALL the removed fuse. Go to R12 .
R12 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE OCCUPANT CLASSIFICATION SYSTEM MODULE (OCSM) DISABLED NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results. Disconnect: SJB Fuse 46 (7.5A) Enter the following diagnostic mode on the diagnostic tool: Network Test Repeat the network test. Do all other modules pass the network test? YES : INSTALL the removed fuse. Go to «Pinpoint Test F»(ref-293472-S12514319402008080700000) . NO : Go to R13 .
R13 VERIFY VEHICLE EQUIPMENT - ACCESSORY PROTOCOL INTERFACE MODULE (APIM) NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results. Inspect the vehicle for an APIM. Is the vehicle equipped with an APIM? YES : Go to R14 . NO : INSTALL the removed fuse. An intermittent fault is not present. Go to «Pinpoint Test S»(ref-293472-S28271434702008080700000) .
R14 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE ACCESSORY PROTOCOL INTERFACE MODULE (APIM) DISABLED NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results. Disconnect: SJB Fuse 3 (15A) Enter the following diagnostic mode on the diagnostic tool: Network Test Repeat the network test. Do all other modules pass the network test? YES : INSTALL the removed fuse. Go to «Pinpoint Test O»(ref-293472-S13884446222008080700000) . NO : INSTALL the removed fuse. An intermittent fault is not present. Go to «Pinpoint Test S»(ref-293472-S28271434702008080700000) .

Pinpoint Test S: No High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Module Communications Network for schematic and connector information.

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Electronic Engine Controls - 3.5L for schematic and connector information.

Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

S1 CHECK THE DATA LINK CONNECTOR (DLC) PINS FOR DAMAGE NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test. Key in OFF position. Disconnect the scan tool cable from the DLC. Inspect DLC pins 6 and 14 for damage. Are DLC pins 6 and 14 OK? YES : Go to S2 . NO : REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
S2 CHECK THE HS-CAN TERMINATION RESISTANCE Key in OFF position. NOTE: Failure to disconnect the battery will result in false resistance readings. Disconnect the battery ground cable. Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Is the resistance between 54 and 66 ohms? YES : Go to S3 . NO : Go to S5 .
S3 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and ground; and between the DLC C251-14, circuit VDB05 (WH), harness side and ground. Are the resistances greater than 1,000 ohms? YES : Go to S4 . NO : Go to S21 .
S4 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO VOLTAGE Connect the battery ground cable. Key in ON position. Measure the voltage between the DLC C251-6, circuit VDB04 (WH/BU), harness side and ground; and between the DLC C251-14, circuit VDB05 (WH), harness side and ground. Is the voltage greater than 6 volts? YES : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : The CAN has tested within specifications. VERIFY the scan tool operation on a substitute vehicle and REPEAT the network test on the suspect vehicle.
S5 CHECK THE HS-CAN TERMINATION RESISTOR Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Is the resistance between 108 and 132 ohms? YES : Go to S6 . NO : Go to S9 .
S6 CHECK THE HS-CAN TERMINATION RESISTOR WITH THE PCM DISCONNECTED Disconnect: PCM C175b Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Is the resistance between 108 and 132 ohms? YES : Go to S7 . NO : Go to S8 .
S7 CHECK THE HS-CAN CIRCUITS BETWEEN THE DLC AND THE PCM FOR AN OPEN Measure the resistance between the PCM C175b-2, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the PCM C175b-3, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Are the resistances less than 5 ohms? YES : Go to S27 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
S8 CHECK THE HS-CAN CIRCUITS BETWEEN THE DLC AND THE IC FOR AN OPEN Disconnect: IC C220 Measure the resistance between the IC C220-7, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the IC C220-8, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Are the resistances less than 5 ohms? YES : Go to S35 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
S9 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Is the resistance less than 5 ohms? YES : Go to S11 . NO : Go to S10 .
S10 CHECK THE HS-CAN CIRCUITS BETWEEN THE DLC AND THE PCM FOR AN OPEN Measure the resistance between the PCM C175b-2, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the PCM C175b-3, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Are the resistances less than 5 ohms? YES : Go to «Pinpoint Test R»(ref-293472-S10429775282008080700000) . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
S11 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE PCM DISCONNECTED Disconnect: PCM C175b Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Is the resistance less than 5 ohms? YES : Go to S12 . NO : CONNECT the battery ground cable. Go to S31 .
S12 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE ABS MODULE DISCONNECTED Disconnect: ABS Module C135 Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Is the resistance less than 5 ohms? YES : Go to S13 . NO : CONNECT the battery ground cable. Go to S32 .
S13 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE SECM DISCONNECTED Disconnect: SECM C2368a Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Is the resistance less than 5 ohms? YES : Go to S14 . NO : CONNECT the battery ground cable. Go to S33 .
S14 VERIFY VEHICLE EQUIPMENT - 4X4 CONTROL MODULE Inspect the vehicle for 4X4. Is the vehicle equipped with 4X4? YES : Go to S15 . NO : Go to S16 .
S15 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE 4X4 CONTROL MODULE DISCONNECTED Disconnect: 4X4 Control Module C281 Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Is the resistance less than 5 ohms? YES : Go to S16 . NO : CONNECT the battery ground cable. Go to S34 .
S16 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE IC DISCONNECTED Disconnect: IC C220 Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Is the resistance less than 5 ohms? YES : Go to S17 . NO : CONNECT the battery ground cable. Go to S35 .
S17 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE RCM DISCONNECTED Disconnect: RCM C310b Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Is the resistance less than 5 ohms? YES : Go to S18 . NO : CONNECT the battery ground cable. Go to S36 .
S18 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE OCCUPANT CLASSIFICATION SYSTEM MODULE (OCSM) DISCONNECTED Disconnect: OCSM C3285 Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Is the resistance less than 5 ohms? YES : Go to S19 . NO : CONNECT the battery ground cable. Go to S37 .
S19 VERIFY VEHICLE EQUIPMENT - ACCESSORY PROTOCOL INTERFACE MODULE (APIM) Inspect the vehicle for an APIM. Is the vehicle equipped with an APIM? YES : Go to S20 . NO : REPAIR the circuit. CONNECT all modules. CONNECT the battery ground cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
S20 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE APIM DISCONNECTED Disconnect: APIM C3342 Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Is the resistance less than 5 ohms? YES : REPAIR the circuit. CONNECT all modules. CONNECT the battery ground cable. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : CONNECT the battery ground cable. Go to S38 .
S21 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE PCM DISCONNECTED Disconnect: PCM C175b Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and ground; and between the DLC C251-14, circuit VDB05 (WH), harness side and ground. Are the resistances greater than 1,000 ohms? YES : CONNECT the battery ground cable. Go to S31 . NO : Go to S22 .
S22 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE ABS MODULE DISCONNECTED Disconnect: ABS Module C135 Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and ground; and between the DLC C251-14, circuit VDB05 (WH), harness side and ground. Are the resistances greater than 1,000 ohms? YES : CONNECT the battery ground cable. Go to S32 . NO : Go to S23 .
S23 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE SECM DISCONNECTED Disconnect: SECM C2368a Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Are the resistances greater than 1,000 ohms? YES : CONNECT the battery ground cable. Go to S33 . NO : Go to S24 .
S24 VERIFY VEHICLE EQUIPMENT - 4X4 CONTROL MODULE Inspect the vehicle for 4X4. Is the vehicle equipped with 4X4? YES : Go to S25 . NO : Go to S26 .
S25 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE 4X4 CONTROL MODULE DISCONNECTED Disconnect: 4X4 Control Module C281 Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Are the resistances greater than 1,000 ohms? YES : CONNECT the battery ground cable. Go to S34 . NO : Go to S26 .
S26 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE IC DISCONNECTED Disconnect: IC C220 Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and ground; and between the DLC C251-14, circuit VDB05 (WH), harness side and ground. Are the resistances greater than 1,000 ohms? YES : CONNECT the battery ground cable. Go to S35 . NO : Go to S27 .
S27 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE RCM DISCONNECTED Disconnect: RCM C310b Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and ground; and between the DLC C251-14, circuit VDB05 (WH), harness side and ground. Are the resistances greater than 1,000 ohms? YES : CONNECT the battery ground cable. Go to S36 . NO : Go to S28 .
S28 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE OCCUPANT CLASSIFICATION SYSTEM MODULE (OCSM) DISCONNECTED Disconnect: OCSM C3285 Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and ground; and between the DLC C251-14, circuit VDB05 (WH), harness side and ground. Are the resistances greater than 1,000 ohms? YES : CONNECT the battery ground cable. Go to S37 . NO : Go to S29 .
S29 VERIFY VEHICLE EQUIPMENT - ACCESSORY PROTOCOL INTERFACE MODULE (APIM) Inspect the vehicle for an APIM. Is the vehicle equipped with an APIM? YES : Go to S30 . NO : REPAIR the circuit. CONNECT all modules. CONNECT the battery. CLEAR the DTCs. REPEAT the network test with the scan tool.
S30 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE APIM DISCONNECTED Disconnect: APIM C3342 Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Are the resistances greater than 1,000 ohms? YES : CONNECT the battery ground cable. Go to S38 . NO : REPAIR the circuit. CONNECT all modules. CONNECT the battery ground cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
S31 CHECK FOR CORRECT PCM OPERATION Disconnect all the PCM connectors. Check for: corrosion damaged pins pushed-out pins Connect all the PCM connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? YES : INSTALL a new PCM. REFER to «ELECTRONIC ENGINE CONTROLS»(ref-293501) article. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the network test with the scan tool.
S32 CHECK FOR CORRECT ABS MODULE OPERATION Disconnect the ABS module connector. Check for: corrosion damaged pins pushed-out pins Connect the ABS module connector and make sure it seats correctly. Operate the system and verify the concern is still present. Is the concern still present? YES : INSTALL a new ABS module. REFER to «VEHICLE DYNAMIC SYSTEMS»(ref-293517) article. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the network test with the scan tool.
S33 CHECK FOR CORRECT SECM OPERATION Disconnect the SECM connector. Check for: corrosion damaged pins pushed-out pins Connect the SECM connector and make sure it seats correctly. Operate the system and verify the concern is still present. Is the concern still present? YES : INSTALL a new SECM. REFER to «POWER STEERING»(ref-293509) article. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the network test with the scan tool.
S34 CHECK FOR CORRECT 4X4 CONTROL MODULE OPERATION Disconnect the 4X4 control module connector. Check for: corrosion damaged pins pushed-out pins Connect the 4X4 control module connector and make sure it seats correctly. Operate the system and verify the concern is still present. Is the concern still present? YES : INSTALL a new 4X4 control module. REFER to «TRANSFER CASE - POWER TRANSFER UNIT (PTU)»(ref-293504) article. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.
S35 CHECK FOR CORRECT IC OPERATION Disconnect the IC connector. Check for: corrosion damaged pins pushed-out pins Connect the IC connector and make sure it seats correctly. Operate the system and verify the concern is still present. Is the concern still present? YES : INSTALL a new IC. REFER to «INSTRUMENT CLUSTER (IC), MESSAGE CENTER, AND WARNING CHIMES»(ref-293475) article. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the network test with the scan tool.
S36 CHECK FOR CORRECT RCM OPERATION Disconnect all the RCM connectors. Check for: corrosion damaged pins pushed-out pins Connect all the RCM connectors and make sure they seat correctly. Verify the concern is still present. Is the concern still present? YES : INSTALL a new RCM. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-293481) article. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.
S37 CHECK FOR CORRECT OCSM OPERATION Disconnect the OCSM connector. Check for: corrosion damaged pins pushed-out pins Connect the OCSM connector and make sure it seats correctly. Verify the concern is still present. Is the concern still present? YES : INSTALL a new OCSM. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-293481) article. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. REPOWER the SRS. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.
S38 CHECK FOR CORRECT APIM OPERATION Disconnect the APIM connector. Check for: corrosion damaged pins pushed-out pins Connect the APIM connector and make sure it seats correctly. Verify the concern is still present. Is the concern still present? YES : INSTALL a new APIM. REFER to «INFORMATION AND ENTERTAINMENT SYSTEMS»(ref-293482) article. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. REPOWER the SRS. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.

PINPOINT TEST T: INTERMITTENT NO MEDIUM SPEED CONTROLLER AREA NETWORK (MS-CAN) COMMUNICATION, ONE OR MORE MODULES ARE NOT RESPONDING DURING NETWORK TEST

Note. Various modules will set network DTCs during this test procedure. Clear DTCs from all modules after the diagnostic procedure is completed.

Scheme 70

Scheme 70: PINPOINT TEST T: INTERMITTENT NO MEDIUM SPEED CONTROLLER AREA NETWORK (MS-CAN) COMMUNICATION, ONE OR

Scheme 71

Scheme 72

Scheme 73

T1 CHECK THE DATA LINK CONNECTOR (DLC) PINS FOR DAMAGE Key in OFF position. Disconnect the scan tool cable from the DLC. Inspect DLC pins 3 and 11 for damage. Are DLC pins 3 and 11 OK? YES : Go to T2 . NO : REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
T2 CHECK THE MS-CAN TERMINATION RESISTANCE NOTE: Failure to disconnect the battery will result in false resistance readings. Disconnect the battery ground cable. Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and the DLC C251-11, circuit VDB07 (VT/OG), harness side. Is the resistance between 54 and 66 ohms? YES : Go to T3 . NO : Go to «Pinpoint Test R»(ref-293472-S10429775282008080700000) .
T3 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and ground; and between the DLC C251-11, circuit VDB07 (VT/OG), harness side and ground. Are the resistances greater than 1,000 ohms? YES : Go to T4 . NO : Go to «Pinpoint Test R»(ref-293472-S10429775282008080700000) .
T4 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO VOLTAGE Connect the battery ground cable. Key in ON position. Measure the voltage between the DLC C251-3, circuit VDB06 (GY/OG), harness side and ground; and between the DLC C251-11, circuit VDB07 (VT/OG), harness side and ground. Is the voltage greater than 6 volts? YES : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : Go to T5 .
T5 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE SJB DISABLED NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results. Disconnect: SJB Fuse 5 (10A) Enter the following diagnostic mode on the diagnostic tool: Network Test Repeat the network test. Do all other modules pass the network test? YES : INSTALL the removed fuse. Go to «Pinpoint Test H»(ref-293472-S32130969002008080700000) . NO : INSTALL the removed fuse. Go to T6 .
T6 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE HVAC MODULE DISABLED NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results. Disconnect: SJB Fuses 15 (10A) and 37 (10A) Enter the following diagnostic mode on the diagnostic tool: Network Test Repeat the network test. Do all other modules pass the network test? YES : INSTALL the removed fuses. Go to «Pinpoint Test N»(ref-293472-S00468942942008080700000) . NO : INSTALL the removed fuses. Go to T7 .
T7 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE ACM DISABLED NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results. Disconnect: SJB Fuse 39 (20A) Enter the following diagnostic mode on the diagnostic tool: Network Test Repeat the network test. Do all other modules pass the network test? YES : INSTALL the removed fuse. Go to «Pinpoint Test I»(ref-293472-S09924155962008080700000) . NO : INSTALL the removed fuse. Go to T8 .
T8 VERIFY VEHICLE EQUIPMENT - DRIVER SEAT MODULE (DSM) Inspect the vehicle for a DSM. Is the vehicle equipped with a DSM? YES : Go to T9 . NO : Go to T10 .
T9 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE DSM DISABLED NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results. Disconnect: SJB Fuses 32 (30A) and 12 (7.5A) Enter the following diagnostic mode on the diagnostic tool: Network Test Repeat the network test. Do all other modules pass the network test? YES : INSTALL the removed fuses. Go to «Pinpoint Test J»(ref-293472-S40220707372008080700000) . NO : INSTALL the removed fuses. Go to T10 .
T10 VERIFY VEHICLE EQUIPMENT - LTM Inspect the vehicle for a LTM. Is the vehicle equipped with a LTM? YES : Go to T11 . NO : Go to T12 .
T11 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE LTM DISABLED NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results. Disconnect: SJB Fuses 14 (10A) and 29 (30A) Enter the following diagnostic mode on the diagnostic tool: Network Test Repeat the network test. Do all other modules pass the network test? YES : INSTALL the removed fuses. Go to «Pinpoint Test L»(ref-293472-S28540250312008080700000) . NO : INSTALL the removed fuses. Go to T12 .
T12 VERIFY VEHICLE EQUIPMENT - APIM, RETM AND/OR SDARS MODULE Inspect the vehicle for an APIM, RETM and/or a SDARS module. Is the vehicle equipped with an APIM, RETM and/or a SDARS module? YES : Go to T13 . NO : Go to T15 .
T13 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE RETM AND/OR SDARS MODULE DISABLED NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results. Disconnect: SJB Fuse 3 (15A) Enter the following diagnostic mode on the diagnostic tool: Network Test Repeat the network test. Do all other modules pass the network test? YES : INSTALL the removed fuse. For vehicles equipped with two or more of the following modules: APIM, RETM or SDARS module, go to T14 . For vehicles equipped with an APIM only, go to «Pinpoint Test O»(ref-293472-S13884446222008080700000) . For vehicles equipped with a RETM only, go to «Pinpoint Test K»(ref-293472-S26211110372008080700000) . For vehicles equipped with a SDARS module only, go to «Pinpoint Test M»(ref-293472-S08650997892008080700000) . NO : INSTALL the removed fuse. Go to T17 .
T14 VERIFY VEHICLE EQUIPMENT - APIM Inspect the vehicle for an APIM. Is the vehicle equipped with an APIM? YES : Go to T15 . NO : Go to T16 .
T15 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE APIM DISCONNECTED NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results. Disconnect: APIM C3342 Enter the following diagnostic mode on the diagnostic tool: Network Test Repeat the network test. Do all other modules pass the network test? YES : CONNECT the APIM. Go to «Pinpoint Test O»(ref-293472-S13884446222008080700000) . NO : CONNECT the APIM. If the vehicle is equipped with a RETM, go to «Pinpoint Test K»(ref-293472-S26211110372008080700000) . Otherwise, go to «Pinpoint Test M»(ref-293472-S08650997892008080700000) .
T16 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE RETM DISCONNECTED NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results. Disconnect: RETM C9029 Enter the following diagnostic mode on the diagnostic tool: Network Test Repeat the network test. Do all other modules pass the network test? YES : CONNECT the RETM. Go to «Pinpoint Test K»(ref-293472-S26211110372008080700000) . NO : CONNECT the RETM. Go to «Pinpoint Test M»(ref-293472-S08650997892008080700000) .
T17 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE IC DISABLED NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results. Disconnect: SJB Fuses 26 (10A) and 29 (5A) Enter the following diagnostic mode on the diagnostic tool: Network Test Repeat the network test. Do all other modules pass the network test? YES : INSTALL the removed fuses. Go to «Pinpoint Test C»(ref-293472-S27088636492008080700000) . NO : INSTALL the removed fuses. An intermittent fault is not present. Go to «Pinpoint Test U»(ref-293472-S06342827272008080700000) .

Pinpoint Test U: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding

Refer to appropriate SYSTEM WIRING DIAGRAMS article ARTICLE, Module Communications Network for schematic and connector information.

PINPOINT TEST U: PINPOINT TEST R: NO MEDIUM SPEED CONTROLLER AREA NETWORK (MS-CAN) COMMUNICATION, ALL MODULES ARE NOT RESPONDING

Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

U1 CHECK DATA LINK CONNECTOR (DLC) PINS FOR DAMAGE NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the Pinpoint Test. Key in OFF position. Disconnect the scan tool cable from the DLC. Inspect DLC pins 3 and 11 for damage. Are DLC pins 3 and 11 OK? YES : Go to U2 . NO : REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
U2 CHECK THE MS-CAN TERMINATION RESISTANCE Key in OFF position. NOTE: Failure to disconnect the battery will result in false resistance readings. Disconnect the battery ground cable. Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and the DLC C251-11, circuit VDB07 (VT/OG), harness side. Is the resistance between 54 and 66 ohms? YES : Go to U5 . NO : Go to U3 .
U3 CHECK THE MS-CAN TERMINATION RESISTOR Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and the DLC C251-11, circuit VDB07 (VT/OG), harness side. Is the resistance between 108 and 132 ohms? YES : Go to U7 . NO : Go to U4 .
U4 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TOGETHER Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and the DLC C251-11, circuit VDB07 (VT/OG), harness side. Is the resistance less than 5 ohms? YES : If the vehicle is equipped with a DSM, go to U8 . Otherwise, go to U9 . NO : Go to U7 .
U5 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and ground; and between the DLC C251-11, circuit VDB07 (VT/OG), harness side and ground. Are the resistances greater than 1,000 ohms? YES : Go to U6 . NO : If the vehicle is equipped with a DSM, go to U17 . Otherwise, go to U18 .
U6 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO VOLTAGE Connect the battery ground cable. Key in ON position. Measure the voltage between the DLC C251-3, circuit VDB06 (GY/OG), harness side and ground; and between the DLC C251-11, circuit VDB07 (VT/OG), harness side and ground. Is the voltage greater than 6 volts? YES : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : VERIFY all module fuses are OK. If OK, REPEAT the network test with the scan tool.
U7 CHECK THE MS-CAN CIRCUITS BETWEEN THE DLC AND THE SJB FOR AN OPEN Disconnect: SJB C2280b Measure the resistance between the SJB C2280b-37, circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06 (GY/OG), harness side. Measure the resistance between the SJB C2280b-38, circuit VDB07 (VT/OG), harness side and the DLC C251-11, circuit VDB07 (VT/OG), harness side. Are the resistances less than 5 ohms? YES : VERIFY all module fuses are OK. If OK, CONNECT all modules. REPEAT the network test with the scan tool. NO : REPAIR the circuit in question. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.
U8 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE DSM DISCONNECTED Disconnect: DSM C341d Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and the DLC C251-11, circuit VDB07 (VT/OG), harness side. Is the resistance less than 5 ohms? YES : Go to U9 . NO : CONNECT the battery ground cable. Go to U27 .
U9 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE SJB DISCONNECTED Disconnect: SJB C2280b Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and the DLC C251-11, circuit VDB07 (VT/OG), harness side. Is the resistance less than 5 ohms? YES : If the vehicle is equipped with a RETM, go to U10 . Otherwise, go to U11 . NO : CONNECT the battery ground cable. Go to U24 .
U10 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE RETM DISCONNECTED Disconnect: RETM C9029 Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and the DLC C251-11, circuit VDB07 (VT/OG), harness side. Is the resistance less than 5 ohms? YES : Go to U11 . NO : CONNECT the battery ground cable. Go to U28 .
U11 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE HVAC MODULE DISCONNECTED Disconnect: HVAC Module C228a (EATC) or C2357a (EMTC) Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and the DLC C251-11, circuit VDB07 (VT/OG), harness side. Is the resistance less than 5 ohms? YES : If the vehicle is equipped with a SDARS module, go to U12 . Otherwise, go to U13 . NO : CONNECT the battery ground cable. Go to U25 .
U12 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE SDARS MODULE DISCONNECTED Disconnect: SDARS Module C4344 Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and the DLC C251-11, circuit VDB07 (VT/OG), harness side. Is the resistance less than 5 ohms? YES : Go to U13 . NO : CONNECT the battery ground cable. Go to U29 .
U13 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE ACM DISCONNECTED Disconnect: ACM C240c Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and the DLC C251-11, circuit VDB07 (VT/OG), harness side. Is the resistance less than 5 ohms? YES : If the vehicle is equipped with a LTM, go to U14 . Otherwise, go to U15 . NO : CONNECT the battery ground cable. Go to U26 .
U14 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE LTM DISCONNECTED Disconnect: LTM C4174a Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and the DLC C251-11, circuit VDB07 (VT/OG), harness side. Is the resistance less than 5 ohms? YES : Go to U15 . NO : CONNECT the battery ground cable. Go to U30 .
U15 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE IC DISCONNECTED Disconnect: IC C220 Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and the DLC C251-11, circuit VDB07 (VT/OG), harness side. Is the resistance less than 5 ohms? YES : If the vehicle is equipped with an APIM, go to U16 . Otherwise, REPAIR the circuit in question. CONNECT all modules. CONNECT the battery ground cable. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : CONNECT the battery ground cable. Go to U33 .
U16 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE APIM DISCONNECTED Disconnect: APIM C3342 Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and the DLC C251-11, circuit VDB07 (VT/OG), harness side. Is the resistance less than 5 ohms? YES : REPAIR the circuit in question. CONNECT all modules. CONNECT the battery ground cable. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : CONNECT the battery ground cable. Go to U34 .
U17 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE DSM DISCONNECTED Disconnect: DSM C341d Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and ground; and between the DLC C251-11, circuit VDB07 (VT/OG), harness side and ground. Are the resistances greater than 1,000 ohms? YES : CONNECT the battery ground cable. Go to U29 . NO : Go to U18 .
U18 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE SJB DISCONNECTED Disconnect: SJB C2280b Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and ground; and between the DLC C251-11, circuit VDB07 (VT/OG), harness side and ground. Are the resistances greater than 1,000 ohms? YES : CONNECT the battery ground cable. Go to U26 . NO : If the vehicle is equipped with a RETM, go to U19 . Otherwise, go to U20 .
U19 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE RETM DISCONNECTED Disconnect: RETM C9029 Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and ground; and between the DLC C251-11, circuit VDB07 (VT/OG), harness side and ground. Are the resistances greater than 1,000 ohms? YES : CONNECT the battery ground cable. Go to U30 . NO : Go to U20 .
U20 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE HVAC MODULE DISCONNECTED Disconnect: HVAC Module C228a (EATC) or C2357a (EMTC) Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and ground; and between the DLC C251-11, circuit VDB07 (VT/OG), harness side and ground. Are the resistances greater than 1,000 ohms? YES : CONNECT the battery ground cable. Go to U27 . NO : If the vehicle is equipped with a satellite digital audio receiver system (SDARS) module, go to U21 . Otherwise, go to U22 .
U21 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE SDARS MODULE DISCONNECTED Disconnect: SDARS Module C4344 Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and ground; and between the DLC C251-11, circuit VDB07 (VT/OG), harness side and ground. Are the resistances greater than 1,000 ohms? YES : CONNECT the battery ground cable. Go to U31 . NO : Go to U22 .
U22 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE ACM DISCONNECTED Disconnect: ACM C240c Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and ground; and between the DLC C251-11, circuit VDB07 (VT/OG), harness side and ground. Are the resistances greater than 1,000 ohms? YES : CONNECT the battery ground cable. Go to U28 . NO : If the vehicle is equipped with a LTM, go to U23 . Otherwise, go to U24 .
U23 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE LTM DISCONNECTED Disconnect: LTM C4174a Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and ground; and between the DLC C251-11, circuit VDB07 (VT/OG), harness side and ground. Are the resistances greater than 1,000 ohms? YES : CONNECT the battery ground cable. Go to U32 . NO : Go to U24 .
U24 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE IC DISCONNECTED Disconnect: IC C220 Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and ground; and between the DLC C251-11, circuit VDB07 (VT/OG), harness side and ground. Are the resistances greater than 1,000 ohms? YES : CONNECT the battery ground cable. Go to U33 . NO : If the vehicle is equipped with an APIM, go to U25 . Otherwise, REPAIR the circuit in question. CONNECT all modules. CONNECT the battery ground cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
U25 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE APIM DISCONNECTED Disconnect: APIM C3342 Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and ground; and between the DLC C251-11, circuit VDB07 (VT/OG), harness side and ground. Are the resistances greater than 1,000 ohms? YES : Go to U34 . NO : REPAIR the circuit in question. CONNECT all modules. CONNECT the battery ground cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
U26 CHECK FOR CORRECT SJB OPERATION Disconnect all the SJB connectors. Check for: corrosion damaged pins pushed-out pins Connect all the SJB connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? YES : INSTALL a new SJB. REFER to «MULTIFUNCTION ELECTRONIC MODULES»(ref-293473) article. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.
U27 CHECK FOR CORRECT HVAC MODULE OPERATION Disconnect all the HVAC module connectors. Check for: corrosion damaged pins pushed-out pins Connect all the HVAC module connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? YES : INSTALL a new HVAC module. REFER to «CLIMATE CONTROL»(ref-293487) article. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.
U28 CHECK FOR CORRECT ACM OPERATION Disconnect all the ACM connectors. Check for: corrosion damaged pins pushed-out pins Connect all the ACM connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? YES : INSTALL a new ACM. REFER to «INFORMATION AND ENTERTAINMENT SYSTEMS»(ref-293482) article. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.
U29 CHECK FOR CORRECT DSM OPERATION Disconnect all the DSM connectors. Check for: corrosion damaged pins pushed-out pins Connect all the DSM connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? YES : INSTALL a new DSM. REFER to «MULTIFUNCTION ELECTRONIC MODULES»(ref-293473) article. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.
U30 CHECK FOR CORRECT RETM OPERATION Disconnect the RETM connector. Check for: corrosion damaged pins pushed-out pins Connect the RETM connector and make sure it seats correctly. Operate the system and verify the concern is still present. Is the concern still present? YES : INSTALL a new RETM. REFER to «INFORMATION AND ENTERTAINMENT SYSTEMS»(ref-293482) article. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.
U31 CHECK FOR CORRECT SDARS MODULE OPERATION Disconnect the SDARS module connector. Check for: corrosion damaged pins pushed-out pins Connect the SDARS module connector and make sure it seats correctly. Operate the system and verify the concern is still present. Is the concern still present? YES : INSTALL a new SDARS module. REFER to «INFORMATION AND ENTERTAINMENT SYSTEMS»(ref-293482) article. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.
U32 CHECK FOR CORRECT LTM OPERATION Disconnect all the LTM connectors. Check for: corrosion damaged pins pushed-out pins Connect all the LTM connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? YES : INSTALL a new LTM. REFER to «BODY CLOSURES»(ref-293463) article. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.
U33 CHECK FOR CORRECT IC OPERATION Disconnect the IC connector. Check for: corrosion damaged pins pushed-out pins Connect the IC connector and make sure it seats correctly. Operate the system and verify the concern is still present. Is the concern still present? YES : INSTALL a new IC. REFER to «INSTRUMENT CLUSTER (IC), MESSAGE CENTER, AND WARNING CHIMES»(ref-293475) article. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the network test with the scan tool.
U34 CHECK FOR CORRECT APIM OPERATION Disconnect the APIM connector. Check for: corrosion damaged pins pushed-out pins Connect the APIM connector and make sure it seats correctly. Operate the system and verify the concern is still present. Is the concern still present? YES : INSTALL a new APIM. REFER to «INFORMATION AND ENTERTAINMENT SYSTEMS»(ref-293482) article. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the network test with the scan tool.

Module Communications Network System: Diagnosis Mercury Sable V

Inspection and Verification

DTC Tables

Symptom Chart

Pinpoint Test A: The PCM Does Not Respond To The Scan Tool

Scheme 3

Scheme 4

Scheme 5

Scheme 6

Pinpoint Test B: The ABS Module Does Not Respond To The Scan Tool

Scheme 7

Scheme 8

Scheme 9

Scheme 10

Pinpoint Test C: The Instrument Cluster (IC) Does Not Respond To The Scan Tool

Scheme 11

Scheme 12

Scheme 13

Scheme 14

Pinpoint Test D: The 4X4 Control Module Does Not Respond To The Scan Tool

Scheme 15

Scheme 16

Scheme 17

Scheme 18

Pinpoint Test E: The Restraints Control Module (RCM) Does Not Respond To The Scan Tool

Scheme 19

Scheme 20

Scheme 21

Pinpoint Test F: The Occupant Classification System Module (OCSM) Does Not Respond With the Scan Tool

Scheme 22

Scheme 23

Scheme 24

Scheme 25

Pinpoint Test G: The Steering Effort Control Module (SECM) Does Not Respond To The Scan Tool

Scheme 26

Scheme 27

Scheme 28

Scheme 29

Pinpoint Test H: The Smart Junction Box (SJB) Does Not Respond To The Scan Tool

Scheme 30

Scheme 31

Scheme 32

Pinpoint Test I: The Audio Control Module (ACM) Does Not Respond To The Scan Tool

Scheme 33

Scheme 34

Scheme 35

Scheme 36

Pinpoint Test J: The Driver Seat Module (DSM) Does Not Respond To The Scan Tool

Scheme 37

Scheme 38

Scheme 39

Scheme 40

Scheme 41

Scheme 42

Pinpoint Test K: The Rear Entertainment Module (RETM) Does Not Respond To The Scan Tool

Scheme 43

Scheme 44

Scheme 45

Scheme 46

Pinpoint Test L: The Liftgate/Trunk Module (LTM) Does Not Respond With The Scan Tool

PINPOINT TEST L: THE LIFTGATE/TRUNK MODULE (LTM) DOES NOT RESPOND TO THE SCAN TOOL

Scheme 47

Scheme 48

Scheme 49

Scheme 50

Pinpoint Test M: The Satellite Digital Audio Receiver System (SDARS) Module Does Not Respond To The Scan Tool

Scheme 51

Scheme 52

Scheme 53

Scheme 54

Pinpoint Test N: The Heating Ventilation Air Conditioning (HVAC) Module Does Not Respond To The Scan Tool

Scheme 55

Scheme 56

Scheme 57

Scheme 58

Pinpoint Test O: The Accessory Protocol Interface Module (APIM) Does Not Respond To The Scan Tool

Scheme 59

Scheme 60

Scheme 61

Scheme 62