Control Modules — 2026 Toyota Harrier Every control module on the 2020-2026 Toyota Harrier — where it lives, replacement time, and what it takes to program a replacement. Modules marked dealer / factory tool won't work after a part swap alone — budget for programming.
Transmission Control Module (TCM) 3.5 hr R&R dealer / factory tool +0.6 hr ▸ programming details
📍 Integrated with transmission valve body, under vehicle center
🔧 Toyota Techstream with TIS subscription
⚠️ Requires transmission fluid drain; adaptive learning reset required after installation
ABS Actuator / Brake Control Module (ABS ECU) 1.8 hr R&R dealer / factory tool +0.5 hr ▸ programming details
📍 Engine compartment, driver side near strut tower
🔧 Toyota Techstream with TIS subscription
⚠️ Brake bleeding required after replacement; VSC/traction control calibration needed
4WD Control ECU / Transfer Case Control Module (4WD ECU) 1.5 hr R&R dealer / factory tool +0.5 hr ▸ programming details
📍 Under vehicle, near transfer case or rear differential
🔧 Toyota Techstream with TIS subscription
⚠️ AWD system calibration required; torque distribution learning procedure
Body Control Module / Multiplex Network Body ECU (BCM) 1.5 hr R&R dealer / factory tool +1.0 hr ▸ programming details
📍 Behind driver side lower dash panel, above kick panel
🔧 Toyota Techstream with TIS subscription
⚠️ Controls body electrical functions; VIN and vehicle configuration coding required
Air Conditioning Amplifier / HVAC Control Module (A/C AMP) 1.5 hr R&R aftermarket tool +0.3 hr ▸ programming details
📍 Behind center dash, integrated with climate control panel
🔧 Autel IM608/IM508, Launch X431
⚠️ Basic initialization typically sufficient; dual-zone configuration if equipped
Pre-Collision System Radar / Millimeter Wave Radar (PCS RADAR) 1.5 hr R&R dealer / factory tool +1.0 hr ▸ programming details
📍 Front grille area, center behind Toyota emblem
🔧 Toyota Techstream with TIS subscription
⚠️ Radar aiming/calibration required after replacement; collision repair often triggers replacement
Electric Power Steering Control Module (EPS ECU) 1.3 hr R&R dealer / factory tool +0.5 hr ▸ programming details
📍 Steering column area, behind lower dash or integrated with steering rack
🔧 Toyota Techstream with TIS subscription
⚠️ Steering angle sensor calibration required after replacement
Power Sliding Door ECU / Multiplex Network Door ECU (DOOR ECU) 1.2 hr R&R aftermarket tool +0.4 hr ▸ programming details
📍 Inside each power door panel (driver/passenger/rear)
🔧 Autel IM608, Launch X431, or Techstream
⚠️ Door position relearn required; window auto-up/down initialization
Engine Control Module / Powertrain Control Module (ECM/PCM) 1.2 hr R&R dealer / factory tool +0.8 hr ▸ programming details
📍 Engine compartment, driver side firewall area, mounted to bulkhead
🔧 Toyota Techstream with TIS subscription
⚠️ VIN registration and immobilizer pairing required; security seed-key authentication mandatory
Audio / Navigation / Multimedia System (RADIO/NAV) 1.2 hr R&R aftermarket tool +0.4 hr ▸ programming details
📍 Center dash, integrated touchscreen unit
🔧 Autel IM608, Launch X431, or Techstream
⚠️ VIN registration recommended; navigation map updates separate; backup camera calibration
Parking Assist ECU / Clearance Sonar ECU (PA/SONAR ECU) 1.0 hr R&R aftermarket tool +0.3 hr ▸ programming details
📍 Behind rear bumper or under rear cargo area
🔧 Autel IM608, Launch X431, or Techstream
⚠️ Sensor calibration may be required; front and rear sensor integration
Adaptive Front Lighting System ECU / LED Control Module (AFS/LED ECU) 1.0 hr R&R aftermarket tool +0.4 hr ▸ programming details
📍 Behind headlight assemblies or in engine compartment
🔧 Autel IM608, Launch X431, or Techstream
⚠️ Headlight aiming required after replacement; adaptive beam calibration
SRS Airbag Control Module (SRS ECU) 1.0 hr R&R dealer / factory tool +0.4 hr ▸ programming details
📍 Center console area, under front seats or center tunnel
🔧 Toyota Techstream with TIS subscription
⚠️ Battery disconnect required; crash data must be cleared; occupant classification reset
Gateway ECU / Communication Gateway (GATEWAY) 1.0 hr R&R dealer / factory tool +0.7 hr ▸ programming details
📍 Behind driver side lower dash or center console area
🔧 Toyota Techstream with TIS subscription
⚠️ Central CAN bus hub; VIN and network configuration required; affects all module communication
Smart Key ECU / Immobilizer ECU (SMART KEY/IMM) 1.0 hr R&R dealer / factory tool +1.0 hr ▸ programming details
📍 Behind center dash or near steering column
🔧 Toyota Techstream with TIS subscription
⚠️ All keys must be re-registered; ECM pairing required; security seed-key authentication
Power Back Door ECU (PBD ECU) 1.0 hr R&R aftermarket tool +0.3 hr ▸ programming details
📍 Inside rear liftgate, driver side
🔧 Autel IM608, Launch X431, or Techstream
⚠️ Height position memory relearn required; kick sensor calibration if equipped
Panoramic View Monitor ECU (PVM ECU) 1.0 hr R&R dealer / factory tool +0.8 hr ▸ programming details
📍 Behind center dash or under front seats
🔧 Toyota Techstream with TIS subscription
⚠️ Multi-camera calibration required; 360-degree view stitching configuration
Data Communication Module / Telematics Control Unit (DCM/TCU) 1.0 hr R&R dealer / factory tool +0.5 hr ▸ programming details
📍 Behind center dash or under rear seat area
🔧 Toyota Techstream with TIS subscription
⚠️ Connected services subscription required; cellular/GPS antenna connections
Backup Camera / Multi-Terrain Monitor ECU (CAMERA ECU) 0.8 hr R&R aftermarket tool +0.3 hr ▸ programming details
📍 Rear liftgate area or behind rear bumper
🔧 Autel IM608, Launch X431, or Techstream
⚠️ Camera calibration lines may require adjustment; multiple camera system if equipped
Combination Meter / Instrument Cluster (METER) 0.8 hr R&R dealer / factory tool +0.6 hr ▸ programming details
📍 Instrument panel, behind steering wheel
🔧 Toyota Techstream with TIS subscription
⚠️ Mileage programming required; VIN registration mandatory; anti-tampering security
Power Seat Control Module / Memory Seat ECU (SEAT ECU) 0.8 hr R&R relearn only +0.2 hr ▸ programming details
📍 Under front seats, integrated with seat frame
🔧 Basic scan tool or Techstream
⚠️ Memory position relearn required; occupant detection integration
Aftermarket tool coverage varies by software version and vehicle build — treat "aftermarket tool" rows as "usually possible" and verify against your tool maker's coverage list before promising a customer. Spot a wrong location or hour?
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