U1900

PINPOINT TEST G: DTC U1900 - CAN COMMUNICATION BUS FAULT - RECEIVE ERROR, DTC U2511 - CAN - DATA MIS-MATCH (RECEIVE DATA DOES NOT MATCH EXPECTED)

G1 CHECK THE BATTERY STATE OF CHARGE (SOC)

� Key in OFF position.

� Check the battery state of charge (SOC) with the battery condition test. Refer to BATTERY,

MOUNTING AND CABLES article.

� Does the battery pass the battery condition test?

YES : Go to G2.

NO : REFER to CHARGING SYSTEM - GENERAL INFORMATION article to diagnose the

low battery voltage condition.

G2 CHECK FOR MODULE COMMUNICATION ON THE HS-CAN

� Connect the diagnostic tool.

� Key in ON position.

� Carry out the network test using the scan tool.

� Is the scan tool unable to communicate with any of the modules on the HS-CAN?

YES : REFER to MODULE COMMUNICATIONS NETWORK article to diagnose the module that is not communicating with the scan tool.

NO : Go to G3.

G3 INSPECT THE HS-CAN CIRCUITRY

� Key in OFF position.

� Inspect all of the HS-CAN network, including the pin crimps, connector fit, corroded/bent/pushed-out/damaged pins and splice integrity in the 8 splices and 10 connections (5 connectors) between

the PCM and the IC. This includes:

� C175B (PCM)

� S122

� S124

� C126

� C300

� S317

� S318

� S319

� S320

� C214

� S220

NOTE: When a new IC is installed, the PATS keys must be programmed into the new IC.

NOTE: When a new IC is installed, the parameters must be reset in the IC and the PCM.

2009 Ford Explorer

2009 ACCESSORIES & BODY, CAB Anti-Theft - Passive Anti-Theft System (PATS) - Explorer, Explorer Sport Trac &

Mountaineer

2009 Ford Explorer


Mountaineer

Tecnologia Compartida

martes, 24 de enero de 2012 09:32:23 p.m. Page 1 © 2006 Mitchell Repair Information Company, LLC.



� S224

� C220 (IC)

� Does the HS-CAN network pass the component inspection?

YES : Go to G4.

NO : REPAIR the HS-CAN circuitry as necessary. CLEAR the DTCs. CYCLE the ignition. REPEAT the self-test. TEST the system for normal operation.

G4 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 article. RESET the parameters in both the IC and the PCM. REFER to Passive Anti-Theft System (PATS)

Parameter Reset. CYCLE the ignition. REPEAT the self-test. TEST the system for normal operation. If the concern is still present, go to G5.

NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. CYCLE the ignition. REPEAT the self-test. TEST the

system for normal operation.

G5 CHECK FOR CORRECT IC OPERATION

� Disconnect all the IC connectors.

� Check for:

� corrosion

� damaged pins

NOTE: When a new PCM is installed, the PATS keys do not need to be programmed into the IC.

NOTE: When a new PCM is installed, the parameters must be reset in the IC and the PCM.

NOTE: When a new IC is installed, the PATS keys must be programmed into the new IC.

NOTE: When a new IC is installed, the parameters must be reset in the IC and the PCM.

2009 Ford Explorer


Mountaineer



� pushed-out pins

� Connect all the IC 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 IC. REFER to INSTRUMENT CLUSTER (IC), MESSAGE CENTER,

AND WARNING CHIMES article. RESET the parameters in both the IC and the PCM. REFER

to Passive Anti-Theft System (PATS) Parameter Reset. PROGRAM the PATS keys into the new IC. REFER to Key Programming Using Diagnostic Equipment. CYCLE the ignition. REPEAT the self-test. TEST the system for normal operation.

NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. CYCLE the ignition. REPEAT the self-test. TEST the system for normal operation.

2009 Ford Explorer


Mountaineer



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U1900