Signal Too High

ECM-2400 FUEL PUMP (FP) RELAY
SIGNAL TOO HIGH

Checking for intermittent faults



- Activate the fuel pump (FP) relay.

The fuel pump (FP) relay should click when it is activated.

Does the fuel pump (FP) relay click?
Yes - Continue below.
No - Skip to "Checking the connector"


Fault-tracing information
Control module previously registered a fault. The fault is now no longer present.


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


Checking the wiring



Check the signal cable between control module terminal # B45 and fuel pump relay terminal 4 (31b) for a short-circuit to supply voltage according to [1][2]Checking Wiring and Terminals. Permanent Fault

If no fault is found in the cable, try a new relay.

Remedy as necessary.

Other information
- To connect the breakout box, Connecting the Breakout Box (ECM)
- To access/replace the control module, Engine Control Module (ECM), Replacing
- To access/replace the fuel pump (FP) relay, Replacing Relay In the Main Fuse Box
- For information about signals, Pinout Values and Diagnostic Parameters


Verification



Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off.
- Reconnect connectors, reinstall components
- Ignition on.
- Activate fuel pump (FP).

The fuel pump should start.

Does the fuel pump (FP) start?
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.