SEAL-BRAKE 3Q6528 - Caterpillar

PID 0168 FMI 01Conditions Which Generate This Code:This condition indicates that the battery circuit to the Engine Control Module (ECM) has a low voltage condition while the engine is running. If battery voltage disappears without returning, the ECM will not log this diagnostic code and the engine will shut down.The ECM detects the following conditions:
The engine control is in the ON mode.
The engine is not cranking.
The engine is running.
The ECM has been powered for at least three seconds.The ECM also detects the following conditions:
Battery voltage to the ECM is below 9 V for 12 V systems for more than 0.5 seconds.
Battery voltage to the ECM is below 18 V for a 24 V system for more than 0.5 seconds.System Response:The ECM may stop injecting fuel. This may be dependent on the length of time of the occurrence of the fault.The check engine lamp and the warning lamp may come on as if the ignition key switch was just turned on and the engine started.Possible Performance Effect:The engine may experience changes in the engine rpm, and intermittent engine shutdowns or complete engine shutdowns while the conditions that cause this diagnostic code are present.Troubleshooting:Test Step 1. Perform the following diagnostic procedure: "Ignition Key Switch Circuit and Battery Supply Circuit - Test"Results:
OK - STOP