Acura TL Type S Manual ECU

The Acura TL Type S Manual ECU (Engine Control Unit) is the central computer that manages engine performance, fuel injection, ignition timing, and various electronic systems in the 2007-2008 Acura TL Type S with manual transmission. This sophisticated control module optimizes the 3.5L V6 engine's 286 horsepower output while ensuring proper emissions compliance and drivability. Below are key sections covering specifications, features, installation, programming, diagnostics, and troubleshooting.

1. ECU Specifications 2. Installation Procedures 3. Programming & Calibration 4. Diagnostic Features 5. Performance Tuning 6. Connector Pinouts 7. Sensor Integration 8. Error Codes & Reset 9. Maintenance Guidelines 10. Technical Support 11. Troubleshooting

ECU Specifications

Key technical specifications for the Acura TL Type S Manual Transmission ECU system.

Specification	Description
Part Number	37820-PCD-A04 (2007), 37820-PCD-A14 (2008)
Engine Compatibility	3.5L J35A8 V6 Engine
Transmission	6-Speed Manual Only
Horsepower Management	286 hp @ 6200 RPM
Torque Management	256 lb-ft @ 5000 RPM
Voltage Requirements	12V DC Vehicle System
Communication Protocol	CAN Bus, K-Line
Memory Capacity	512KB Flash, 64KB RAM
Operating Temperature	-40°C to 85°C (-40°F to 185°F)
Emissions Compliance	EPA Tier 2 Bin 5, CARB LEV II

Installation Procedures

Proper installation guidelines for ECU replacement or upgrade.

Disconnect battery: Remove negative terminal to prevent electrical damage.
Locate ECU: Under passenger side dashboard, behind glove compartment.
Remove connectors: Carefully disconnect all wiring harnesses (3 main connectors).
Mount new ECU: Secure in original mounting location with proper brackets.
Reconnect wiring: Ensure all connectors are fully seated and locked.
Reconnect battery and perform initialization procedure.

WARNING! Always disconnect battery before ECU work. Handle ECU with care to avoid static discharge damage.

Programming & Calibration

ECU programming and calibration procedures for optimal performance.

Initialization: Turn ignition to ON position (do not start engine).
Idle Learn Procedure: Start engine, let idle for 10 minutes with no electrical loads.
Throttle Position Sensor Reset: Turn ignition ON for 30 seconds, then OFF for 30 seconds.
ECM/PCM Code Clear: Use Honda HDS scanner or equivalent diagnostic tool.
Adaptive Memory Reset: Disconnect battery for 10 minutes to clear learned parameters.

CAUTION! Use only approved diagnostic equipment. Incorrect programming may cause engine damage.

Diagnostic Features

OBD-II Compliance: Full OBD-II protocol support with enhanced Acura parameters.
Real-time Monitoring: Live data streaming for engine parameters.
Freeze Frame Data: Captures engine conditions when DTCs are set.
Mode $06: Non-continuous monitor test results.
Mode $08: On-board system, test, or component monitoring.
Readiness Monitors: Comprehensive emissions system monitoring.
Snapshot Function: Records parameter data during specific events.
VIN Programming: Vehicle Identification Number programming capability.

Performance Tuning

ECU tuning capabilities and performance enhancement features.

Factory Parameters: Fuel maps, ignition timing, VTEC engagement points, rev limiter (6800 RPM), speed limiter (155 mph).

Tunable Parameters: Fuel trim adjustments, ignition timing advance/retard, VTEC crossover points (4800 RPM stock), throttle response mapping, idle speed control, cold start enrichment.

Aftermarket Support: Hondata FlashPro, KTuner compatibility for custom tuning. Reflash capability for performance upgrades.

Connector Pinouts

Detailed ECU connector pinout information for diagnostics and wiring.

Connector A (32-pin): Main power, ground, and sensor inputs.
Connector B (25-pin): Injector drivers, ignition control, VTEC solenoids.
Connector C (31-pin): Communication, vehicle speed, A/C control.
Connector D (22-pin): Secondary O2 sensors, EVAP, MIL control.

Tip: Refer to service manual for complete pin-by-pin wiring diagrams and voltage specifications.

Sensor Integration

ECU integration with critical engine management sensors.

MAP Sensor: Manifold Absolute Pressure monitoring.
MAF Sensor: Mass Air Flow measurement.
TPS: Throttle Position Sensor input.
ECT Sensor: Engine Coolant Temperature monitoring.
CKP Sensor: Crankshaft Position detection.
CMP Sensor: Camshaft Position synchronization.
HO2S: Heated Oxygen Sensors (primary and secondary).
KS: Knock Sensor monitoring for detonation prevention.

WARNING! Sensor calibration is critical for proper engine operation. Use only genuine Acura sensors.

Error Codes & Reset

Common Diagnostic Trouble Codes (DTCs) and reset procedures.

PCM DTCs: P0101-P0103 (MAF circuit), P0111-P0113 (ECT circuit), P0121-P0123 (TPS circuit), P0300-P0306 (misfire detection), P0420 (catalyst efficiency).

Reset Procedure: Use HDS scanner to clear codes, or disconnect battery for 10 minutes. Complete drive cycle required for readiness monitor reset.

Maintenance Guidelines

ECU maintenance and inspection procedures.

Regular inspection of wiring harnesses and connectors. Check for corrosion or damage. Ensure proper grounding points are clean and secure. Keep ECU area free from moisture and excessive heat.

CAUTION! Do not attempt to open ECU housing. Internal components are sensitive to static and contamination.

Technical Support

Acura technical support information and service procedures.

Acura Service Manual procedures, Technical Service Bulletins (TSBs), warranty information. For ECU-related issues, contact Acura Client Service at 1-800-382-2238 or visit techinfo.honda.com for technical documentation.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No Start Condition	ECU power/ground	Check main relay, fuses, ground connections, ECU power supply.
Poor Performance	Sensor inputs	Scan for DTCs, check MAF, MAP, TPS sensor readings and wiring.
Check Engine Light	Multiple causes	Retrieve DTCs, diagnose specific system failures, clear codes after repair.
Transmission Issues	Speed sensors	Check VSS output, reverse light switch, clutch position sensor.
Communication Errors	CAN bus issues	Check CAN bus wiring, termination resistors, module communication.

Reset Procedure: Battery disconnect or HDS scanner reset required for certain conditions.

Service: Acura dealership service department or qualified Acura technician recommended.