SPRING-VALVE INNER 9N5495 - Caterpillar

System Operation Description:The control module for the Electronic Ignition System has an input that provides different ignition timing. The control module retards the timing by 10 degrees when the input is connected to ground. This allows the engine to operate on a different fuel, such as propane, that requires a different timing.When this input is connected to ground, a 330-11 diagnostic code is activated.
Illustration 1 g01045624
Schematic diagram for the propane input switch
Illustration 2 g01045625
Schematic diagram for the propane input switchThe engine is configured for Canadian Standards Association (CSA).Test Step 1. Inspect the Electrical Connectors and the Wiring
Set the engine control to the OFF/RESET mode. Remove the electrical power from the engine.Note: For the following steps, refer to Troubleshooting, "Inspecting Electrical Connectors".
Thoroughly inspect each of the following connectors:
EIS connectors for the control module
Connections for the equipment that provides the input for retarding the timing
Illustration 3 g01047023
Harness side of the EIS connector (EISC-B) −Battery (EISC-j) Input for retarding the timing
Perform a 45 N (10 lb) pull test on each of the wires that are associated with the circuit for retarding the timing.
Check the terminal strips for corrosion and for mechanical failure.
If the engine is equipped for CSA, check the harnesses and the wiring for abrasion and for pinch points between the equipment that provides the input for retarding the timing and the control module.Expected Result:The connectors, pins, and sockets are connected properly. The terminal strips do not have corrosion or mechanical failure. The connectors and the wiring do not have corrosion, abrasion, or pinch points.Results:
OK - The components are in good condition with proper connections. If the timing is not retarded and the timing should be retarded, proceed to Test Step 2. If the timing is retarded and the timing should not be retarded, proceed to Test Step 3.
Not OK - The components are not in good condition and/or at least one connection is improper.Repair: Perform the necessary repairs and/or replace parts, if necessary.STOPTest Step 2. Check for an Open Circuit
Verify that the equipment that provides a ground for the retarding of the timing is activated. The equipment could be a switch, a relay, or a jumper wire.
Disconnect the EIS connector.
Check for continuity between terminals EISC-B and EISC-j.Expected Result:The circuit has continuity.Results:
OK - The circuit has continuity. Proceed to Test Step 4.
Not OK - The circuit is open. Repair: Repair the connection and/or the wire, when possible. Replace parts, if necessary.STOPTest Step 3. Check for a Short Circuit
Verify that the equipment that provides a ground for the retarding of the timing is not activated. The equipment could be a switch, a relay, or a jumper wire.
Disconnect the EIS connector.
Check for continuity between terminals EISC-B and EISC-j.Expected Result:The circuit is open.Results:
OK - The circuit is open. Proceed to Test Step 4.
Not OK - There is a short circuit.Repair: Repair the connection and/or the wire, when possible. Replace parts, if necessary.STOPTest Step 4. Perform a Self Test of the EIS Control Module
Perform the self test for the EIS control module. Refer to Troubleshooting, "Control Module