Signal Too High - Permanent Fault

ECM-6000 AIR CONDITIONING (A/C) RELAY SIGNAL
SIGNAL TOO HIGH - PERMANENT FAULT

Checking wiring and components



Check the signal cable between control module #B44 and air conditioning (A/C) relay #4 for a short-circuit to supply voltage according to [1][2]Checking Wiring and Terminals. Permanent Fault

Hint: Use an electrician's screwdriver with at least a 3 W bulb to determine whether the cable is short-circuited to supply voltage.

Remedy as necessary.

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


Verification



Hint: After carrying out the repair, check that the fault has been remedied.

- Ignition off.
- Reconnect connectors, reinstall components
- Ignition on.
- Activate air conditioning (A/C) relay.

An "clicking sound" should be heard from the air conditioning (A/C) relay when it is activated.

Does the air conditioning (A/C) relay function?
Yes - Testing Complete.
No - Continue below.


Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed. Exit fault tracing for this diagnostic trouble code (DTC) or make another attempt.