Lotus Evora - Ignition System

Lotus Service Notes Section EMR
Page 39
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 ECU Pin ECU Connector
1 Supply Voltage Coil 1 Coil 2 Coil 3 Coil 4 Coil 5 Coil 6
2 Ignition Coil Feedback D2 D2 D2 D2 D2 D2 32 Way (Left)
3 Coil Output (Logic) F4 F3 F2 F1 E4 E3 32 Way (Left)
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.
2009/02