Chevrolet Spark MK1 MF48D M300 LT 60 REG 80bph Engine Control Unit Ecu 1.2 1206 cc Petrol B12D1 2010 - 2015 5 Speed Manual 5 Door Hatchback MF48D

Chevrolet Spark MK1 MF48D M300 LT 60 REG 80bph Engine Control Unit Ecu 25182025:GM 25182025:AALH:5WY1511A:96958816:0689:86 AALH B 1K11A 1167 0689:86AALHB1K11A02040325 1.2 1206 cc B12D1 5 Speed Manual MF48D 2010,2011,2012,2013,2014,2015 Petrol MK1 LT 60 REG 80bph v4329-33017

Additional Info

1. ECU Overview

ECU Part Numbers:

• 25182025 (GM OEM ECU)
• GM 25182025
• 5WY1511A
• 96958816
• 0689:86 AALH B 1K11A

Engine & Transmission Details:

• Engine Code: B12D1 (1.2L, 1206cc, 80bhp, DOHC 16V, VVT)
• Fuel Type: Petrol
• Transmission: 5-Speed Manual
• Vehicle Model: Chevrolet Spark MK1 (M300) LT (2010–2015, 60 REG Facelift)
• Emission Standard: Euro 5

2. ECU Functions

The Engine Control Unit (ECU) is responsible for optimizing engine performance, fuel efficiency, and emissions control.

Main Functions:

1. Fuel Injection Control:
   • Regulates fuel injection timing & mixture for efficiency.
2. Ignition Timing Management:
   • Adjusts spark plug firing for combustion efficiency.
3. Variable Valve Timing (VVT) Control:
   • Adjusts camshaft position for better performance & emissions.
4. Throttle Body & Idle Speed Control:
   • Regulates electronic throttle response & idling.
5. Emissions Monitoring & OBD-II Diagnostics:
   • Controls O2 sensors, catalytic converter, and EGR valve.
6. Cooling System Regulation:
   • Manages coolant temperature & fan speed.
7. Knock Sensor Management:
   • Prevents engine knocking (pre-detonation issues).
8. Communication with Other Modules:
   • Works with BCM (Body Control Module), ABS, Immobilizer, and Transmission Module via CAN Bus.

3. ECU Installation Process

Pre-Installation Precautions

• Disconnect the Battery (-) Terminal to prevent electrical damage.
• Use an anti-static wristband to avoid ECU static damage.
• Ensure ECU Compatibility (Match ECU part numbers).
• Check all connectors & wiring for corrosion or loose connections.

Installation Steps

1. Locate the ECU
   • The ECU is typically found in the engine bay (near the firewall or battery tray).
2. Remove the Old ECU
   • Unplug the wiring harness carefully (push the locking tabs before removal).
   • Remove mounting screws or brackets.
3. Install the New ECU
   • Place it securely in the correct position.
   • Reconnect the wiring harness securely.
4. Reconnect the Battery and perform ECU adaptation & programming.
5. Perform System Check:
   • Use GM Tech2, VCDS, or an OBD-II scanner to verify operation.

4. Safety Precautions

• Avoid Moisture & Heat Exposure – Protect ECU from direct water contact.
• Ensure Proper Grounding – Faulty grounding can cause ECU failure.
• Perform ECU Programming – If swapping ECU, it needs coding for immobilizer.
• Use OEM Software for Calibration – GM Tech2 or compatible OBD software.

5. Common Fault Codes (DTCs) & Troubleshooting

The ECU stores Diagnostic Trouble Codes (DTCs) when an issue is detected.

6. Clearing Fault Codes

Using OBD-II Scanner (GM Tech2, VCDS, or Universal OBD)

1. Connect OBD-II Scanner to the diagnostic port (under the dashboard).
2. Turn Ignition ON (engine OFF).
3. Select "Read Fault Codes" ? Identify the stored errors.
4. Select "Clear Codes" to erase stored errors.
5. Restart engine and check for warning lights.

Manual ECU Reset (Battery Disconnect Method)

1. Disconnect the battery (-) terminal for 30 minutes.
2. Press the brake pedal for 20-30 seconds (discharges ECU capacitors).
3. Reconnect the battery and turn the ignition ON (without starting).
4. Start the engine and let it idle for 5–10 minutes.
5. Check for any warning lights.

7. Fitment in the Car & Communication with Other Modules

ECU Location:

• Mounted inside the engine bay (near the battery or firewall).

Communication with Other Modules (CAN Bus System):

1. Body Control Module (BCM): Controls vehicle electronics (lights, windows, locks).
2. Immobilizer System: Prevents engine start without a programmed key.
3. ABS & Traction Control System: Adjusts engine power during wheel slip.
4. Fuel Injection System: Ensures correct fuel-air mixture.

8. Summary