Engine Control Module Replacement
Callout
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Component Name
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Note: If the ECM is to be replaced, the ECM must be RESET
(prepared for removal) prior to removal from the vehicle. Failing to
reset the ECM will result in the following:
- Inability to test the ECM for warranty purposes
- Inability to use the ECM in other vehicles.
Preliminary Procedures
- Prepare the ECM for replacement. Refer to
Control Module References.
- Using a scan tool, retrieve the percentage of
remaining engine oil. Record the remaining engine oil life.
- Disconnect the battery negative cable. Refer to
Battery Negative Cable Disconnection and Connection.
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1
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Engine Control Module Mounting Bracket
Procedure
- Disconnect the electrical wiring harness connectors
from the engine control module.
- Unclip the engine control module bracket from
the battery tray.
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2
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Engine Control Module Fasteners (Qty: 4)
Caution: Refer to Fastener Caution.
Tighten
9 Y (80 lb in)
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3
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Engine Control Module
Caution:
- Turn the ignition OFF when installing or removing the control
module connectors and disconnecting or reconnecting the power to
the control module (battery cable, powertrain control module (PCM)/engine
control module (ECM)/transaxle control module (TCM) pigtail, control
module fuse, jumper cables, etc.) in order to prevent internal control
module damage.
- Control module damage may result when the metal case contacts
battery voltage. DO NOT contact the control module metal case with
battery voltage when servicing a control module, using battery booster
cables, or when charging the vehicle battery.
- In order to prevent any possible electrostatic discharge damage
to the control module, do no touch the connector pins or the soldered
components on the circuit board.
- Remove any debris from around the control module connector surfaces
before servicing the control module. Inspect the control module
connector gaskets when diagnosing or replacing the control module.
Ensure that the gaskets are installed correctly. The gaskets prevent
contaminant intrusion into the control module.
- The replacement control module must be programmed.
Procedure
- Remove the engine control module from the engine
control module bracket.
- If replacing the ECM, refer to
Control Module References for programming
and setup.
Note: Before removing the engine control module (ECM), record
the oil life percentage remaining. Use the scan tool to reset the Engine
Oil Life remaining back to the original percentage recorded.
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