Signal Missing - Intermittent Fault

ECM-6000 AIR CONDITIONING (A/C) RELAY SIGNAL
SIGNAL MISSING - INTERMITTENT FAULT

Checking cables and connectors



Check connector for air conditioning (A/C) relay for contact resistance and oxidation according to [1][2]Checking Wiring and Terminals. Intermittent Faults and loose connections according to [1][2]Checking Wiring and Terminals. Intermittent Faults

Check signal cable between control module #B44 and air conditioning (A/C) relay #4 and power supply between system relay #3 and A/C relay #2 for an intermittent open-circuit according to [1][2]Checking Wiring and Terminals. Intermittent Faults

Other information
- Connecting the breakout box/accessing the control module Connecting the Breakout Box (ECM)
- To access/replace the air conditioning (A/C) relay, Integrated Relay/Fusebox, Engine Compartment, Replacing
- For information about signals, see Diagnostic Parameters and Pinout Values. Signal Description, ME7, B5XX4T


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