Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Engine Control Module: Service and Repair
2006 Scion xB L4-1.5L (1NZ-FE)SECTION Service and Repair
REMOVAL
1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation.
2. REMOVE GLOVE COMPARTMENT DOOR ASSEMBLY
3. REMOVE ECM
a. Disconnect the 4 ECM connectors.
b. Remove the 2 bolts and ECM.
c. Remove the 2 screws and ECM bracket.
d. Remove the 2 screws and No. 2 ECM bracket.
e. Remove the 2 screws and No. 3 ECM bracket.
INSTALLATION
1. INSTALL ECM
a. Install the No. 3 ECM bracket with the 2 screws.
b. Install the No. 2 ECM bracket with the 2 screws.
c. Install the ECM bracket with the 2 screws.
d. Install the ECM with the 2 bolts.
Torque: 3.0 N.m (31 kgf.cm, 27 in.lbf)
e. Connect the 4 ECM connectors.
2. INSTALL GLOVE COMPARTMENT DOOR ASSEMBLY
3. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL
1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation.
2. REMOVE GLOVE COMPARTMENT DOOR ASSEMBLY
3. REMOVE ECM
a. Disconnect the 4 ECM connectors.
b. Remove the 2 bolts and ECM.
c. Remove the 2 screws and ECM bracket.
d. Remove the 2 screws and No. 2 ECM bracket.
e. Remove the 2 screws and No. 3 ECM bracket.
INSTALLATION
1. INSTALL ECM
a. Install the No. 3 ECM bracket with the 2 screws.
b. Install the No. 2 ECM bracket with the 2 screws.
c. Install the ECM bracket with the 2 screws.
d. Install the ECM with the 2 bolts.
Torque: 3.0 N.m (31 kgf.cm, 27 in.lbf)
e. Connect the 4 ECM connectors.
2. INSTALL GLOVE COMPARTMENT DOOR ASSEMBLY
3. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.