PIN AS 1096706 - Caterpillar

System Operation Description:The control module for the Electronic Ignition System (EIS) activates the output for the shutdown relay when the engine must be shut down due to an undesirable condition.The control module can sink a maximum of 200 mA through this output. A flyback diode is included in the internal circuit. The diode protects the module from voltage spikes that can occur when a relay is activated.The device that is connected to the output can be a relay or another module. If the engine is equipped with a Status Control Module (SCM), this output is connected to an input on the SCM. The SCM will stop the flow of fuel when this output is activated.If this output is connected to the coil of a relay, the other side of the coil must be connected to the +Battery.The control module monitors the output for these faults:An Open Circuit - The control module detects this fault when the engine is running and when the engine is not running. If the engine is not running, the engine will not start. If the engine is running, the control module will signal for a shutdown, but the engine will not shut down. A 322-05 diagnostic code will be generated. The output for the warning lamp will also be activated.Short to −Battery - The control module detects this fault when the engine is running and when the engine is not running. The control module will signal for a shutdown and the engine will shut down. A 322-05 diagnostic code will be generated. The output for the warning lamp will also be activated.Short to +Battery - The control module detects this fault only when the engine is running. The control module will terminate the ignition and the engine will shut down. A 322-03 diagnostic code will be generated. The output for the warning lamp will not be activated.The most likely cause of a faulty circuit is a problem with the wiring. The next likely cause is a problem with the output device. The least likely cause is a problem with the EIS control module.
Illustration 1 g01045640
Schematic diagram of the output for the shutdown relayThe engine is equipped with a remote control panel that includes a status control module.
Illustration 2 g01045641
Schematic diagram of the output for the shutdown relayThe 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 on the control module
Connections for the equipment that is connected to the output for the shutdown relay
Illustration 3 g01047042
Harness side of the EIS connector (EISC-F) Output for the shutdown relay
Perform a 45 N (10 lb) pull test on each of the wires that are associated with the output for the shutdown relay.
Check the terminal strips for corrosion and for mechanical failure.
If the engine is equipped for CSA, check the harnesses and the