RENR5042-02 137 Troubleshooting Section D. Check for one of the following logged diagnostic codes or active diagnostic codes: 190-08 342-08 Expected Result: One or both of the diagnostic codes that are listed above are logged or active. Note: If the engine will not start and Cat ET displayed 0 rpm during cranking, select “No Engine rpm”. Results: 190-08 or 342-08 – There is an active diagnostic code or a logged diagnostic code. Proceed to Test Step 3. Not OK – If none of the codes that are listed are active or logged and the engine is not running properly, refer to the appropriate symptoms in Troubleshooting, “Troubleshooting Without a Diagnostic Code”. STOP.
No Engine rpm – Engine rpm is not indicated on Cat ET. Proceed to Test Step 2. Test Step 2. Check the Installation of the Sensors A. Turn the key switch to the OFF position. g01099116 Illustration 64 P2 ECM connector (P2-25) Primary engine speed/timing (P2-26) TDC probe + (P2-35) Primary engine speed/timing + (P2-36) TDC probe (P2-46) Secondary engine speed/timing + (P2-47) Secondary engine speed/timing Test Step 1. Check for Diagnostic Codes g01146452 Illustration 65 A. Connect the Caterpillar Electronic Technician (ET) to the service tool connector. Typical speed sensor (1) Bracket (2) Flange (1) O-ring B. Turn the key switch to the ON position. B.
Visually inspect the sensor without removing the sensor from the engine. Flange (2) must be flush against the engine in order to ensure proper operation. Inspect bracket (1) in order to ensure that the installation allows the flange of the sensor to be flush against the engine. Verify that the bracket is not bent. C. Start the engine and run the engine until the engine is at normal operating temperature. Note: If the engine will not start, monitor the engine rpm on Cat ET while the engine is being cranked. Cat ET may need to be powered from another battery while the engine is being cranked.