2003 Acura TL Solenoid Repair Manual

The 2003 Acura TL features various solenoids including transmission solenoids, VTEC solenoids, and purge control solenoids that are critical for optimal vehicle performance. This manual provides comprehensive guidance on diagnosing, testing, replacing, and maintaining these essential components. Below are detailed sections covering identification, troubleshooting, repair procedures, specifications, and maintenance guidelines.

1. Solenoid Types and Locations 2. Tools and Equipment Required 3. Diagnostic Procedures 4. Replacement Instructions 5. Technical Specifications 6. Common Symptoms and Solutions 7. Maintenance Schedule 8. Safety Precautions 9. Parts and Compatibility 10. Warranty Information 11. Troubleshooting Guide

Solenoid Types and Locations

Key solenoid components: Transmission shift solenoids, VTEC solenoid, Purge control solenoid, Lock-up solenoid.

Solenoid TypeLocationFunction
Shift Solenoid ATransmission valve bodyControls 1-2 and 3-4 gear shifts
Shift Solenoid BTransmission valve bodyControls 2-3 gear shifts
VTEC SolenoidEngine cylinder headActivates variable valve timing
Purge Control SolenoidNear charcoal canisterControls fuel vapor purge
Lock-up SolenoidTransmission torque converterEngages torque converter clutch
Transmission Pressure ControlTransmission valve bodyRegulates hydraulic pressure

Tools and Equipment Required

Essential tools for solenoid repair and replacement procedures.

  1. Basic hand tools: Socket set, wrenches, screwdrivers
  2. OBD-II scanner: For diagnostic trouble codes
  3. Multimeter: For electrical testing
  4. Transmission fluid: Honda/Acura ATF-Z1
  5. Drain pan: For fluid collection
  6. Jack and jack stands: For vehicle lifting
  7. Torque wrench: For proper bolt tightening

WARNING! Use proper safety equipment and follow all safety procedures when working under vehicle.

Diagnostic Procedures

Step-by-step diagnostic process for solenoid issues.

  1. Connect OBD-II scanner: Check for transmission or engine codes
  2. Perform electrical tests: Check solenoid resistance (typically 12-25 ohms)
  3. Test voltage supply: Verify 12V power to solenoid connectors
  4. Check wiring: Inspect for damaged wires or poor connections
  5. Monitor live data: Use scanner to observe solenoid operation
  6. Road test: Verify proper shifting and solenoid function

CAUTION! Always disconnect battery before performing electrical tests.

Replacement Instructions

Technical Specifications

Common Symptoms and Solutions

Recognizing solenoid-related issues and appropriate corrective actions.

Shift Solenoid Issues: Harsh shifting, delayed engagement, stuck in one gear, transmission slipping. VTEC Solenoid Issues: Loss of power at high RPM, poor fuel economy, check engine light. Purge Solenoid Issues: Rough idle, fuel smell, emissions test failure.

Maintenance Schedule

Regular maintenance procedures for solenoid longevity.

  1. Transmission fluid change: Every 30,000 miles
  2. Electrical connector inspection: Every 15,000 miles
  3. Wiring harness check: During routine service
  4. Solenoid function test: With every transmission service
  5. Ground connection cleaning: Annually or as needed

Tip: Use only recommended fluids to prevent solenoid damage.

Safety Precautions

Essential safety measures during solenoid repair procedures.

  1. Disconnect battery: Before any electrical work
  2. Use jack stands: Never work under vehicle supported only by jack
  3. Wear safety glasses: Protect eyes from fluids and debris
  4. Avoid hot components: Allow engine and exhaust to cool
  5. Proper fluid disposal: Follow environmental regulations
  6. Fire prevention: Keep away from ignition sources when working with fuel system

WARNING! Transmission fluid is flammable and can cause skin irritation.

Parts and Compatibility

Genuine Acura parts and compatible alternatives.

Part NumberDescriptionCompatible Models
28100-P8A-A01VTEC Solenoid Assembly2003-2006 Acura TL
28250-RBB-A01Shift Solenoid A2003-2008 Acura TL
28251-RBB-A01Shift Solenoid B2003-2008 Acura TL
17130-P8A-003Purge Control Solenoid2003-2006 Acura TL

Warranty Information

Acura genuine parts come with 12-month/unlimited mileage warranty. Aftermarket parts may have varying warranty periods. Labor warranty typically 90 days from repair date.

Troubleshooting Guide

SymptomPossible CauseCorrective Action
Check engine light onFaulty solenoid or wiringScan for codes, test solenoid resistance, check wiring
Transmission slippingFailed shift solenoidReplace affected solenoid, check fluid level and condition
Poor accelerationVTEC solenoid failureTest VTEC solenoid, check oil pressure, replace if faulty
Rough idlePurge solenoid stuck openTest purge solenoid operation, replace if defective
No upshift/downshiftMultiple solenoid failureDiagnose with scanner, replace faulty solenoids

Reset: Clear codes with scanner after repairs.

Service: Contact Acura dealership or certified technician for complex issues.

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