GASKET 2P1625 - Caterpillar

This procedure covers the diagnostic trouble codes in Table 1:
Table 1
Diagnostic Codes Table
CDL Code and Description Comments
1-5
Cylinder #1 Injector : Current Below Normal These codes relate to the electrical circuit that includes injector terminals 1 and 3.
1-6
Cylinder #1 Injector : Current Above Normal
2-5
Cylinder #2 Injector : Current Below Normal
2-6
Cylinder #2 Injector : Current Above Normal
3-5
Cylinder #3 Injector : Current Below Normal
3-6
Cylinder #3 Injector : Current Above Normal
4-5
Cylinder #4 Injector : Current Below Normal
4-6
Cylinder #4 Injector : Current Above Normal
5-5
Cylinder #5 Injector : Current Below Normal
5-6
Cylinder #5 Injector : Current Above Normal
6-5
Cylinder #6 Injector : Current Below Normal
6-6
Cylinder #6 Injector : Current Above Normal
2602-6
Cylinder #1 Injector Actuator #2 : Current Above Normal These codes relate to the electrical circuit that includes injector terminals 2 and 4.
2602-5
Cylinder #1 Injector Actuator #2 : Current Below Normal
2604-6
Cylinder #2 Injector Actuator #2 : Current Above Normal
2604-5
Cylinder #2 Injector Actuator #2 : Current Below Normal
2606-6
Cylinder #3 Injector Actuator #2 : Current Above Normal
2606-5
Cylinder #3 Injector Actuator #2 : Current Below Normal
2608-6
Cylinder #4 Injector Actuator #2 : Current Above Normal
2608-5
Cylinder #4 Injector Actuator #2 : Current Below Normal
2610-6
Cylinder #5 Injector Actuator #2 : Current Above Normal
2610-5
Cylinder #5 Injector Actuator #2 : Current Below Normal
2612-6
Cylinder #6 Injector Actuator #2 : Current Above Normal
2612-5
Cylinder #6 Injector Actuator #2 : Current Below Normal
Illustration 1 g06114441
Schematic for the injector solenoids
Probable Causes
Codes
Wiring
Open circuit
Short Circuit
ECMRecommended Actions
Table 2
Troubleshooting Test Steps Values Results
1. Check for Codes
A. Establish communication between Cat® Electronic Technician (ET) and the ECM . Refer to Troubleshooting, "Electronic Service Tools", if necessary.
B. Determine if a code is active or logged.
Codes
Result: A code is logged or active.
Proceed to Test Step 2.
Result: A code is not logged or active. There is not an electronic problem with the injectors at this time.
Proceed to Test Step 2.
2. Inspect the Wiring Harness Between the ECM and the Valve Cover Base
A. Turn the keyswitch to OFF.
B. Thoroughly inspect the connectors. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
C. Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector. Perform a pull test on each of the wires that are associated with injector solenoids.
D. Check the allen head screw on the ECM connector for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct torque values.
E. Check the harness and wiring for abrasions and for pinch points from the valve cover base to the ECM.
Wiring
Result: The connectors and the wiring appear to be OK.
The harness between the ECM and the connector does not have an open circuit.
Proceed to Test Step 3.
Result: There is a problem with the connectors and/or wiring.
Repair: Repair the connectors or wiring and/or replace the connectors or wiring. Ensure that all of the seals are properly in place and ensure that the connectors are coupled. Perform an injector solenoid test in order to verify that the problem has been resolved.
If the problem is not resolved, proceed to Test Step 3.
3. Check the Harness between the ECM and the Valve Cover Base for an Open