Diagnostic Aids

An intermittent condition may be caused by poor connection, rubbed-through insulation, or a broken wire inside insulation. Check ECM harness connectors for backed-out, improperly mated, broken locks, improperly formed, or damaged terminals, and poor terminal-to-wire connections, and damaged harness.

Fig 1: Code 41 - Schematic Ignition Signal Circuit, No Signal

Fig 2: Code 41 - Flow Chart (1 Of 2) Ignition Signal Circuit, No Signal

Fig 3: Code 41 - Flow Chart (2 Of 2) Ignition Signal Circuit, No Signal