Isuzu 4JA1 Workshop Manual page 511

Engine Control Module (ECM) Replacement
Engine Control Module
Procedure
Important:
If the ECM is to be replaced the following programmed
contents MUST be reprogrammed into the new ECM.
• Vehicle identification number (VIN).
• Latest software/calibrations if released. Refer to
Service Programming System (SPS) Description
and Service Programming System (SPS) (Remote
Procedure) or Service Programming System (SPS)
(Pass-Thru Procedure) in this section.
Removal Procedure
1. Disconnect the negative battery cable.
2. Remove the seat left-hand side.
3. Roll up the floor carpet.
4. Remove four bolts from the ECM cover.
5. Disconnect the two connectors from the ECM.
Repair Instructions
(ECM) Replacement
Engine Control System (4JH1) 6E-257
Installation Procedure
1. Connect the two connectors to the ECM.
2. Put on the ECM to the floor panel.
3. Tighten the ECM cover by four bolts with specified
tightening torque.
Tightening torque
• Bolts: 8.0 - 12.0 N.m (0.8 - 1.2 kgf.m)
4. Lay the floor carpet exactly.
5. Put on the seat to the floor panel and tighten with
specified tightening torque.
Tightening torque
• Bolts: 40.0 N.m (4.1 kgf.m)
6. Connect the negative battery cable.
Vehicle Identification Number (VIN) Programming
Procedure
Important:
If the ECM from another vehicle is installed, VIN is not
programmed by the scan tool. Use the SPS to change
the original VIN. Refer to Service Programming System
(SPS) Description and Service Programming System
(SPS) (Remote Procedure) or Service Programming
System (SPS) (Pass-Thru Procedure) in this section.
Important:
If an updated software/calibrations is released, DO NOT
program the VIN now. The VIN is programmed at SPS
procedure. Refer to Service Programming System
(SPS) Description and Service Programming System
(SPS) (Remote Procedure) or Service Programming
System (SPS) (Pass-Thru Procedure) in this section.