DTC 41

Diagnostic Chart:

Electrical Schematic:

CIRCUIT DESCRIPTION
The Engine Control Module (ECM) receives an ignition signal when the ignition switch is turned to the "ON" position. When the ignition switch is turned to the "START" position, this signal is toggled "ON" and "OFF" through the igniter. As this signal is toggled "ON" and "OFF," so is the ignition coil, thus inducing a voltage in the secondary coil of the ignition coil. This induced voltage is then used to fire the spark plugs.

Diagnostic Trouble Code (DTC) 41 will set if the following condition is met:
- Ignition fail safe signal is not inputted 6 times continuously.

CHART TEST DESCRIPTION
Number(s) below refer to circled number(s) on the diagnostic chart.
(Part 1 0f 2)
1. This checks for power to the ignition coil.
2. This checks for a faulty ignition coil.
3. This checks for an open or short to ground in the BRN/WHT or BLK/WHT wires to the noise suppressor filter.
4. This checks for an open in BLK wire to noise suppressor filter or for a faulty noise suppressor filter.
(Part 2 of 2)
5. This checks for an open or short to ground in the BRN wire to the ECM.
6. This checks for a short to voltage in the BRN or BRN/WHT wires.
7. This checks for an open or short to ground in the BRN/WHT wire to the igniter.
8. This checks the igniter for a good ground.
9. This checks to see if the ECM is toggling the ignition signal. Either an open, a short to ground or a faulty ECM or igniter is at fault.

DIAGNOSTIC AIDS
Intermittent Malfunctions
An intermittent malfunction may be caused by a poor connection, rubbed through wire insulation, or a wire broken inside the insulation. Inspect harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals and poor terminal-to-wire connections before component replacement.