ECM (1ZZ-FE) (April, 2003): Replacement

WARNING: This page is about a different car, the 2004 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.

DISCONNECT BATTERY NEGATIVE TERMINAL
REMOVE GLOVE COMPARTMENT DOOR ASSY (See REPLACEMENT )
REMOVE ECM
1. Remove the 2 clips using a clip remover. Then, open the cover.
  
  Fig 1: Removing Clips
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the 4 ECM connectors.
3. Remove the wire harness from the wire harness clamp.
  
  Fig 2: Removing Wire Harness From Wire Harness Clamp
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Remove the 2 bolts.
5. Unfasten the claw and clip, then remove the ECM.
Fig 3: Removing Bolts
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
REMOVE ECM COVER
1. Take the 2 double-sided adhesive tapes off the ECM, then remove the ECM cover.
Fig 4: Removing ECM Cover
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
REMOVE ECM BRACKET NO. 2 (DENSO MADE)
1. Remove the 2 screws, then remove the ECM bracket No. 2.
Fig 5: Removing ECM Bracket No. 2
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
REMOVE ECM BRACKET NO. 1
1. Remove the 2 screws, then remove the ECM bracket No. 1.
Fig 6: Removing ECM Bracket No. 1
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
REMOVE ECM BRACKET NO. 3 (DELCO MADE)
1. Remove the 2 screws, then remove the ECM bracket No. 3.
Fig 7: Removing ECM Bracket No. 3
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSTALL ECM BRACKET NO. 3 (DELCO MADE)
Torque: 3.2 N.m (33 kgf.cm, 28 in..lbf)
INSTALL ECM BRACKET NO. 1
Torque: 3.2 N.m (33 kgf.cm, 28 in..lbf)
INSTALL ECM BRACKET NO. 2 (DENSO MADE)
Torque: 3.2 N.m (33 kgf.cm, 28 in..lbf)
INSTALL ECM COVER
1. Install a new ECM cover to the ECM as shown in the illustration.
Fig 8: Identifying Installing ECM Cover Dimensions
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSTALL ECM
Torque: 3.0 N.m (31 kgf.cm, 27 in..lbf
INSTALL GLOVE COMPARTMENT DOOR ASSY
CONNECT BATTERY NEGATIVE TERMINAL
Torque: 5.4 N.m (55 kgf.cm, 48 in..lbf
RESET MEMORY (A/T TRANSAXLE)
CAUTION: Perform the RESET MEMORY (AT initialization) when replacing the ECM, engine assembly or automatic transaxle assembly.
1. The hand-held tester only.
  1. Connect the hand-held tester to the DLC3.
  2. Turn the ignition switch ON.
  3. Perform the RESET MEMORY procedure from the ENGINE menu.
CAUTION: After performing the RESET MEMORY, be sure to perform the ROAD TEST as described earlier.