"No GPS DATA (Right)" Message on AccuGrade® Systems{7220, 7490} Caterpillar

Motor Grader:

12H (S/N: CBK1-UP; AMZ1-UP)

14H (S/N: ASE1-UP)

16H (S/N: ATS1-UP)

120H (S/N: ALZ1-UP)

135H (S/N: CBC1-UP; AMX1-UP)

140H (S/N: CCA1-UP; APM1-UP)

160H (S/N: ASD1-UP; CCP1-UP)

163H (S/N: ARL1-UP)

Track-Type Tractor:

D3G (S/N: CFC1-UP; CFF1-UP; BYR1-UP)

D4G (S/N: FDC1-UP; CFN1-UP; TLX1-UP)

D4G XL (S/N: HYD1-UP)

D5G (S/N: CLW1-UP; FDW1-UP)

D6K (S/N: DHA1-UP; FBH1-UP)

D5N (S/N: AKD1-UP; AGG1-UP; CFH1-UP; CKT1-UP)

D6N (S/N: DJA1-UP; ALH1-UP; CCK1-UP; AKM1-UP; ALR1-UP; ALY1-UP; DJY1-UP)

D6R Series II (S/N: BNC1-UP; CAD1-UP; ADE1-UP; BRE1-UP; DAE1-UP; BRJ1-UP; AFM1-UP; BPM1-UP; AEP1-UP; BLT1-UP; FDT1-UP; AAX1-UP; BMY1-UP; BPZ1-UP)

D6R Series III (S/N: GJB1-UP; WCB1-UP; HDC1-UP; TBC1-UP; HCD1-UP; HKE1-UP; WRG1-UP; MTJ1-UP; DMK1-UP; JEK1-UP; EXL1-UP; JDL1-UP; DLM1-UP; LFM1-UP; LGP1-UP; DPS1-UP; GMT1-UP; MRT1-UP; EXW1-UP)

D6R Series III XL (S/N: RFC1-UP)

D7R Series II (S/N: BRP1-UP; BNX1-UP; AEC1-UP; ABJ1-UP; BPK1-UP; BNM1-UP; BRM1-UP; AGN1-UP; ACS1-UP; BPT1-UP; ADW1-UP; AFG1-UP)

D8T (S/N: J8B1-UP; KPZ1-UP)

D9T (S/N: RJS1-UP)

Introduction

This Technical Information Bulletin replaces the 07March 2007 TIB, "No GPS DATA (Right) Message on AccuGrade^® Systems". Disregard the 07March 2007 TIB. Refer to the following information.

The problem that is identified below does not have a known permanent solution. Until a permanent solution is known, use the solution that is identified below.

Problem

The AccuGrade^® System has experienced repeated instances of a "No GPS Data (Right)" diagnostics error. This diagnostics error mainly affects dual GPS systems.

Analysis of the CAN data link traffic has indicated that the ECM was transmitting error frames onto the CAN data link frequently enough to disrupt normal communications. This disruption causes the AccuGrade^® System to intermittently lose communication with other AccuGrade^® components. This results in a poor response from the GPS receivers. When a loss of communication between the AccuGrade^® and an AccuGrade^® component occurs, the system registers the component as missing.

Solution

A Software improvement for the Valve Control ECM has been made. The enhanced software provides improved communications over the CAN data link. Use Table 1 in order to identify which software part number to use.

The flash files that are listed in Table 1 can be found on SIS Web. Caterpillar Electronic Technician is used to flash the software into the ECM.