Signal Too Low - Permanent Fault

ECM-33X0 IGNITION COIL CYLINDER X, SIGNAL
SIGNAL TOO LOW - PERMANENT FAULT

Checking wiring and components



Check signal cable between ignition coil #1 and control module:
- #A31 (#A31) (ECM 3300)
- #A30 (#A30) (ECM 3310)
- #A50 (#A50) (ECM 3320)
- #A52 (#A52) (ECM 3330)
- #A51 (#A51) (ECM 3340)
for a short-circuit to ground according to Checking Wiring and Terminals

Remedy as necessary.

Other information
- Connecting the breakout box/accessing the control module Connecting the Breakout Box (ECM)
- To access/replace the ignition coil, Ignition Coils, Replacing
- For information about signals, see Diagnostic Parameters and Pinout Values. Pinout Values and Diagnostic Parameters


Verification



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

- Ignition off.
- Reconnect the connectors, reinstall components etc.
- Start the engine and let it idle.

Engine should fire on all cylinders.

Is the engine idling evenly?
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.