Operation CHARM: Car repair manuals for everyone.
Home >> Saturn >> 2007 >> ION L4-2.4L >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Relays and Modules - Computers and Control Systems >> Engine Control Module >> Locations
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Engine Control Module: Locations



Engine Controls Component Views

Front View Automatic Transmission




1 - Throttle Body
2 - Fuse Block Underhood C1
3 - Transmission Control Module (TCM)
4 - Engine Control Module (ECM)
5 - Park/Neutral Position (PNP) Switch
6 - Engine Oil Pressure (EOP) Switch
7 - C100 Engine Harness to Transmission Harness
8 - G105
9 - Crankshaft Position (CKP) Sensor
10 - Starter Motor
11 - Knock Sensor Pigtail Connector
12 - A/C High Pressure Switch
13 - A/C Compressor
14 - Generator
15 - C150 Engine Harness to Fuel Injector Harness
pro multis · About Operation CHARM