Rav 4 TCM 89661-42701 Repair

Toyota RAV4 ECU Repair Service (2001–2005)
Fix Harsh Shifting & Transmission Issues – ECM / TCM Combined Module

This is a repair service for the Engine Control Module (ECM) on 2001–2005 Toyota RAV4 models (both 2WD and 4WD) that are experiencing harsh or erratic transmission shifting.

These models use a combined ECU/TCM unit that is prone to failure, often mimicking a faulty transmission, when in fact the issue is with the control module.

✅ Common Symptoms:
Harsh or delayed shifting, especially into 3rd gear

Erratic or unpredictable gear changes

Slamming into reverse

Feels like the car is braking by itself

Clicking or rattling noises from the front of the vehicle

Inconsistent behaviour—fine one day, failing the next

Issues present only when hot or cold

Sluggish takeoff from a stop

Often no check engine light or codes, but when present:

P0750 / P0753 / P0755 / P0758 / P1760

🔧 Our Repair Service Includes:
Full diagnostic testing of the ECM/TCM

Replacement of known failing components

Repair of internal track damage caused by heat stress

Bench testing after repair to verify correct operation

In 99% of cases, these transmission-related issues are resolved without replacing or rebuilding the transmission—by simply repairing the ECM correctly.

89661-42701

211000-8141

89661-4270

211000-8141

1AZ-FF

#25699 / 25854