3AB-64307-0 Tohatsu DRIVE SHAFT "L"

Problem
Intermittent Speed "Burp"
There have been reports of an intermittent engine speed "burp", or an occasional engine shutdown when the engine is idling. Some operators of trucks that are equipped with electronic gauge displays have reported that the gauges temporarily sweep, and then, return to normal operation. The reset occurrences have been infrequent and most operators have never experienced this incident. This event was an issue that pertains to the software and does not involve the Engine Control Module (ECM). Additionally, this event does not involve the engine speed sensors. Do not replace the ECM or the engine speed sensor if you have this issue.Temporary Low Power
There have also been a few reports of temporary low power. This occurrence has been reported as a noticeable lack of power after a start-up when the engine is warm. This lack of power lasts up to 20 minutes. After 20 minutes, full power is restored to the engine. It is possible to avoid this incident by performing the following steps:
Turn the key to the RUN position.
Wait for a few seconds, and then turn the key to the CRANK position in order to start the engine.The ECM rest issue that is described above could also trigger this event. The Intake Valve Actuator (IVA) derate strategy is the cause of the low power occurrence. The IVA was initiated for approximately 20 minutes by the quick start. The engine power was limited to approximately 298 kW (400 hp). Operators with lower engine ratings were unfamiliar with this problem. This issue is not a failure of the ECM.Trucks Equipped with Brakesaver and CAT Engine Brakes
On trucks equipped with both Brakesaver and CAT Engine Brakes only, the engine software limited the selection of CAT Engine Brake level to "LOW" and "MEDIUM" via the switches on the dashboard. This restriction protected the drivelines in chassis that could not withstand the combined braking power of both braking systems (if the CAT Engine Brake were to be set on "HIGH"). The new software includes a new customer programmable parameter option that is called "Max Engine Retarder Level". When the new parameter is set to "HIGH", the new parameter will allow the software to recognize "HIGH" selection on the switches on the dashboard and the new parameter will operate the CAT Engine Brake accordingly. The new parameter can be set to "LOW", "MED", or "HIGH". The default setting is "LOW". Eventually this parameter will be programmable in any version of Caterpillar Electronic Technician (ET) later than 2005B version 1.1. Until then, you will need to call your Caterpillar Dealer Technical Communicator (TC) to have them help program this value. This entire feature and the associated default to "LOW" only affects software for engines equipped with Brakesaver. Refer to Table 1 for the acceptable settings for each transmission and rear end combination.
Table 1
OEM    Eaton
Transmission    Eaton/Dana
Rears    Engine
Retarder
Maximum
Setting    
Kenworth     RTL022918B     ≥
20865 kg (46000 lb)     HIGH    
RTL020918B <
20865 kg (46000 lb)     MED    
Peterbilt     RTL022918B     ≥
20865 kg (46000 lb)     HIGH    
RTL020918B <
20865 kg (46000 lb)     MED    
Other
Noncombined
Applications (1)     RTL022918B     ≥
20865 kg (46000 lb)     HIGH    
RTL020918B <
20865 kg (46000 lb)     HIGH    
( 1 ) Other Noncombined Applications are those applications that do not use Brakesaver and Exhaust Retarders at the same time.Parts Service Only (PSO) Uprate
An issue concerning the Parts Service Only (PSO) Uprate files has been remedied. The current software version had an incorrect Top Engine Limit (TEL). The new software has the TEL correctly set at 2320 rpm. This only affected special uprate files and did not affect the more common ratings that come out of the factory.White Smoke and Engine Stumble
There have been a few reports of white smoke and engine stumble during cold weather start-up and cold weather. The updated software will address these issues.Solution
Flash new software. Refer to Table 2 for part numbers of flash files.There has been no changes in performance in this software release except for the temporary low power issue that is described in this article. Do not flash this software if you anticipate an enhancement in the power. Do not flash this software if you anticipate an enhancement in fuel economy.
Table 2
Old Flash File    New Flash File    Interlock Code    
271-1370     283-1177     20    
271-1371     283-1178     22    
271-1372     283-1179     7    
271-1373     283-1180     43    
271-1374     283-1181     21    
271-1375     283-1182     23    
271-1376     283-1183     24    
271-1377     283-1184     25    
271-1378     283-1185     28    
271-1379     283-1186     29    
271-1380     283-1187     26    
271-1381     283-1188     27    
271-1382     283-1189     30    
271-1383     283-1190     31    
271-1384     283-1191     32    
271-1385     283-1192     33    
271-1386     283-1193     9    
271-1387     283-1194     10    
271-1388     283-1195     6    
271-1389     283-1196     8    
271-1390     283-1197     34    
271-1391     283-1198     35    
271-1392     283-1199     36    
271-1393     283-1200     37    
271-1394     283-1201     38    
271-1395     283-1202     39    
271-1396     283-1203     40    
271-1397     283-1204     41    
271-1398     283-1205     42