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.
2012 Scion tC L4-2.5L (2AR-FE)FACTORY OEM SERVICE PROCEDURE
Removal
2AR-FE ENGINE CONTROL: ECM: REMOVAL
1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable is reconnected Repair Instruction - Initialization.
2. REMOVE AIR CLEANER CAP SUB-ASSEMBLY
(a) Disconnect the mass air flow meter connector.
(b) Disconnect the purge VSV connector.
(c) Detach the 2 wire harness clamps.
(d) Disconnect the 2 purge line hoses.
(e) Disconnect the No. 2 ventilation hose from the cylinder head cover.
(f) Disconnect the purge line hose from the clamp.
(g) Lock the No. 1 air cleaner hose clamp, and then disconnect the No. 1 air cleaner hose from the throttle body.
(h) Detach the 2 hook clamps, and then remove the air cleaner cap.
(i) Remove the air cleaner filter element from the air cleaner case.
3. REMOVE AIR CLEANER CASE
(a) Detach the harness clamp.
(b) Remove the 3 bolts and air cleaner case.
4. DISCONNECT AIR CLEANER INLET
(a) Remove the bolt and disconnect the air cleaner inlet.
5. REMOVE ECM
(a) Disconnect the 2 ECM connectors.
Text in Illustration
NOTICE:
After disconnecting a connector, make sure that dirt, water and other foreign matter does not contact the connector.
(1) Raise the 2 levers while pushing the locks on the 2 levers and disconnect the 2 ECM connectors.
(b) Detach the clamp.
(c) Remove the 2 bolts and ECM with bracket.
(d) Remove the 4 screws and 2 ECM brackets.
Factory Service Tools
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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.