Signal Too Low

ECM-4000 CANISTER PURGE (CP) VALVE
SIGNAL TOO LOW

Checking for intermittent fault



- Ignition on.
- Activate canister purge (CP) valve.

A "click" should be heard when the canister purge (CP) valve is activated.

Is the canister purge (CP) valve working?
Yes - Continue below.
No - Skip to "Checking the Wiring and Component"


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 and Component



Check cable between control module # A2 and canister purge (CP) valve terminal 2. Check for a short-circuit to ground.

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 canister purge (CP) valve, Locations
- Checking Wiring and Terminals

Was a fault found in the wiring?
Yes - Skip to "Verification"
No - Continue below.


Replacing component



- Ignition off.
Try a new canister purge (CP) valve.


Verification



Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off.
- Reconnect connectors, reinstall components
- Ignition on.
- Activate canister purge (CP) valve.

A "click" should be heard when the canister purge (CP) valve is activated.

Is the canister purge (CP) valve working?
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.