For instructions on using Cat ET, refer to the User's Manual that is included with the software.
For instructions on using the DDT, refer to Special Instruction, SEHS9122 that is provided with the tool and refer to Tool Operating Manual, SEHS8806.
Connecting Cat ET to the Junction box
| Tools Needed | Qty |
| This PC configuration is recommended: Intel Pentium II 333 mHz processor 64 megabyte of RAM 4.3 GB hard drive Drive for floppy disks (3.5 inch with 1.44 MB) 14X speed CD-ROM drive VGA monitor or display RS-232 port with 16550AF UART Windows NT 4.0 (1) Windows 95 (1) Windows 98 (1) Mouse |
1 |
| This PC configuration has the minimum requirements: IBM PC compatible 100 MHz processor 32 megabyte of RAM 10 MB of available hard drive space CD-ROM drive Drive for floppy disks (3.5 inch with 1.44 MB) Windows NT 4.0 (1) Windows 95 (1) Windows 98 (1) RS-232 port with 16550AF UART VGA monitor or display Mouse |
1 |
| Single user license for Cat ET Use the most recent version of this software. "JERD2124" |
1 |
| Software Data subscription for all engines "JERD2129" |
1 |
| 160-0141 Adapter Cable | 1 |
| 171-4401 Communication Adapter II | 1 |
| 160-0133 Adapter Cable (CAT Data Link) | 1 |
| 7X-1414 Adapter Cable | 1 |
| ( 1 ) | Any of these operating systems are acceptable. |
- Connect cable (2) to the RS232 serial port of PC (1) .
 | |
| Illustration 1 | g00942864 |
(1) PC (2) 196-0055 Serial Cable or the 160-0141 Serial Cable (3) 171-4401 Communication Adapter II (4) 207-6845 Adapter Cable (5) 7X-1414 Data Link Cable | |
- Connect cable (2) to communication adapter (3) .
- Connect cable (4) to communication adapter (3) .
- Connect cable (4) to cable (5) .
- Connect cable (5) to the service tool connector on the junction box.
- Turn the engine control switch to the STOP position. The engine should be OFF.
When the system has power, Cat ET and the communication adapter will establish communication with the EIS control module. If this does not occur, refer to the engine's Electronic Troubleshooting manual.
Connecting the DDT to the Junction box
| Tools Needed | Quantity | |
| 7X-1400 Electronic Tool Group | 1 | |
| 7X-1414 Adapter Cable As | 1 | |
| 7X-1685 Adapter Cable As | 1 | |
| Service Program Module, NEGX4511 | 1 | |
Note: The 7X-1400 Electronic Tool Group is also called the Digital Diagnostic Tool (DDT).
- Connect cable (1) to the service tool connector on the engine mounted junction box.
 | |
| Illustration 2 | g00819907 |
(1) 7X-1414 Adapter Cable As (2) 7X-1685 Adapter Cable As (3) 7X-1400 Electronic Tool Group (DDT) | |
- Connect cable (2) to cable (1) .
- Connect DDT (3) to cable (2) .
The other connector on cable (2) is not used.
When the system has power, the DDT will establish communication with the EIS control module. If this does not occur, refer to the engine's Electronic Troubleshooting manual.
Programming the Electronic Ignition System
For information on the programmable parameters, refer to Systems Operation, "Electronic Control System Parameters".
Use Cat ET or the DDT to program the parameters. The description of the parameter depends on the electronic service tool that is used. The parameters are listed in Table 3. Record the values for the parameters.
| Programmable Parameters for the Electronic Ignition System | |
| Cat ET Description |
DDT Description |
| "Desired Engine Ignition Timing" | "DES ENG TIMING" |
| "Speed Timing Map" | "SPEED TIMING MAP" |
| "Engine Load Timing Map" | "LOAD TIMING MAP" |
| "Engine Configuration" | "ENGINE TYPE" |
| "Number of Detonation Sensors" | "DET SENSORS" |
| "Engine Compression Ratio" | "COMPRESSION" |
Recommendations for Programming the Parameters
"Desired Engine Ignition Timing" or "DES ENG TIMING"
For the desired engine timing, obtain an analysis of the fuel. Enter the data from the fuel analysis into the Caterpillar Software Program, LEKQ6378, "Methane Number Program". Program the value for the desired timing according to the recommendations in Engine Performance, LEBQ6484, "Fuel Usage Guide".
"Speed Timing Map" or "SPEED TIMING MAP"
Program this parameter to the full load rpm that is printed on the engine's Information Plate.
"Engine Load Timing Map" or "LOAD TIMING MAP"
For normal operation, the recommended value for this parameter is "00".
"Engine Configuration" or "ENGINE TYPE"
Program this parameter to the engine model that is printed on the engine's Serial Number Plate.
"Number of Detonation Sensors" or "DET SENSORS"
This parameter must be programmed in order for the electronic ignition system to provide protection from detonation. The engine has two detonation sensors. Make sure that the value for this parameter is programmed to "2".
"Engine Compression Ratio" or "COMPRESSION"
Program this parameter to the compression ratio that is printed on the engine's Information Plate.
Timing Calibration
| Tools Needed | Quantity | |
| 7X-1400 Electronic Tool Group | 1 | |
| 7X-1414 Adapter Cable As | 1 | |
| 7X-1685 Adapter Cable As | 1 | |
| 7X-1695 Cable | 1 | |
| 7X-1395 Cable Adapter | 1 | |
| 6V-2197 Magnetic Transducer | 1 | |
The EIS control module can calibrate the mechanical differences between the top center position of the flywheel and the position of the timing wheel for the engine speed/timing sensor. The timing calibration must be performed if the EIS control module is replaced or if the timing gear is serviced.
For instructions on performing the timing calibration, refer to the engine's Electronic Troubleshooting manual.
Testing the EIS Control Module
| Tools Needed | Quantity | |
| 7X-1400 Electronic Tool Group | 1 | |
| 7X-1414 Adapter Cable As | 1 | |
| 7X-1685 Adapter Cable As | 1 | |
| 7X-1713 Test Harness As | 1 | |
The EIS control module is capable of a self test. If you suspect that there is a problem with the EIS control module, perform the test. Follow the instructions in Electronic Troubleshooting, SENR6535, " G3408C and G3412C Engines".
Adjusting the Timing Wheel
- Place the No. 1 piston at the top center position of the compression stroke. Refer to Testing and Adjusting, "Finding the Top Center Position for the No. 1 Piston".
- Remove cover (1) and plug (2) .
 | |
| Illustration 3 | g00738738 |
(1) Cover (2) Plug | |
- Loosen four bolts (4) .
 | |
| Illustration 4 | g00738727 |
(1) Cover (2) Plug (3) Threaded hole in the timing wheel (4) Bolts | |
- Move the timing wheel until a 7/16 bolt will slide through the hole for plug (2) into threaded hole (3) .
- Tighten bolts (2) to 135 ± 5 N·m (100 ± 4 lb ft).
- Remove the 7/16 bolt. Install plug (2) .
- Install cover (1) .