Ignition System - Lotus Evora Service Notes

Lotus Service Notes

Ignition System

P0351 Ignition Coil "A" Primary/Secondary Circuit
P0352 Ignition Coil "B" Primary/Secondary Circuit
P0353 Ignition Coil "C" Primary/Secondary Circuit
P0354 Ignition Coil "D" Primary/Secondary Circuit
P0355 Ignition Coil "E" Primary/Secondary Circuit
P0356 Ignition Coil "F" Primary/Secondary Circuit
Description
A Direct Ignition System (DIS) is used on the engine. The DIS improves the ignition accuracy, reduces high-
voltage loss, and enhances the reliability of the ignition system. The DIS is a 1-cylinder system that ignites one
cylinder with one ignition coil. The ECU determines the ignition timing and outputs the ignition signals (IGT) for
each cylinder. Based on IGT signals, the power transistors in the igniter cuts off the current to the primary coil,
which induces a spark at the spark plug connected to the secondary coil. The igniter will also send an ignition
confirmation signal (IGF) as a fail-safe measure to the ECU.
Component connections
Connector Pin Description
1 Supply Voltage
2 Ignition Coil Feedback
3 Coil Output (Logic)
4 Ground
Monitor:
• Continuous
Enable Criteria:
• Engine running
Malfunction Criteria:
• No IGF signal to ECM while engine is running
Potential failure modes:
• Open or short in IGF1 – IGF6 circuits from ignition coil to ECU
• Coil failure
• ECU
Diagnostic Mask:
• The MIL will be illuminated if a fault is present for two consecutive trips.
ECU Pin
Coil 1 Coil 2 Coil 3
D2 D2 D2
F4 F3 F2
2009/02
Section EMR
Coil 4 Coil 5 Coil 6
D2 D2 D2
F1 E4 E3
ECU Connector
32 Way (Left)
32 Way (Left)
Page 39