Signal Missing - Intermittent Fault

ECM-6110 ENGINE COOLING FAN (FC) RELAY LOW SPEED
SIGNAL MISSING - INTERMITTENT FAULT

Checking component and wiring



Check engine cooling fan (FC) relay connector for contact resistance and oxidation according to [1][2]Checking Wiring and Terminals. Intermittent Faults

Check power supply cable for an intermittent open-circuit according to [1][2]Checking Wiring and Terminals. Intermittent Faults, also check that the fuse has not blown.

Check cable between engine control module (ECM) # A7 and engine cooling fan (FC) relay # IN1 for an intermittent open-circuitaccording to [1][2]Checking Wiring and Terminals. Intermittent Faults

Remedy as necessary

Other information
- Connecting the breakout box/accessing the control module Connecting the Breakout Box (ECM)
- For information about signals, see Diagnostic Parameters and Pinout Values. Signal Description, ME7, B5XX4T
- The engine cooling fan (FC) relay is supplied with power via fuse 11A/1


Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.