DTC U210C: Lost Communication Between Fuel Pump Control Module B And Restraints Control Module
U210C - LOST COMMUNICATION BETWEEN FUEL PUMP CONTROL MODULE B AND RESTRAINTS CONTROL MODULE
| Description: The fuel pump control module 2 monitors the duty cycle and frequency of the signal it receives from the restraints control module (RCM). The fuel pump control module 2 determines if the signal on the event notification signal (ENS) circuit from the RCM is a valid duty cycle and frequency. If the duty cycle or frequency is invalid, the fuel pump control module 2 sends a 40% duty cycle signal on the fuel pump monitor 2 (FPM2) circuit to report the concern to the PCM. The test fails when the fuel pump control module 2 is still reporting that it is receiving an invalid duty cycle or frequency from the RCM after a calibrated amount of time. | |||
Possible Causes:
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| Diagnostic Aids: Check the harness for routing, alterations, incorrect shielding, or electrical interference from other systems. The ENS is used to notify the fuel pump control module 2 of an event requiring the fuel pump to be disabled. This signal is used instead of an inertia fuel shutoff (IFS) switch. The fuel pump control module 2 monitors the ENS signal by sending a 12V low current signal on the ENS circuit to the RCM. | |||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to PINPOINT TEST KC . | ||