Table of Contents
This guide provides detailed fuse box diagrams and relay locations for the second-generation Acura RL (KB1/KB2; 2004–2012 model years) equipped with 3.5L and 3.7L engines.
Fuse No. 9 in passenger compartment Fuse Box No. 1 powers the cigarette lighter / accessory power socket.
Engine Compartment
General location of electronic control units (ECUs) in the engine compartment of the Acura RL (second generation):
|
|
| 1 | Primary Under-Hood Fuse Box |
| 2 | Relay Box |
| 3 | Secondary Under-Hood Fuse Box |
| 4 | Radiator Fan Control (RFC) Unit |
| 5 | Vehicle Stability Assist (VSA) Modulator Control Unit |
Primary Under-Hood Fuse Box
Located on the driver’s side of the engine compartment. Push the locking tabs to remove the cover.
General overview.
| Diagram | ||
|---|---|---|
|
||
| No. | Description | Amps |
| R1 | Fog Light Fan Control Relay | - |
| R2 | Windshield Wiper Relay | - |
| R3 | Rear Window Defogger Relay | - |
| R4 | A/C Compressor Clutch Relay | - |
| R5 | Blower Motor Relay | - |
| 1 | Left Headlight Low Beam (HID Unit) | 15 A |
| 2 | Rear Window Defogger Coil, Relay Control Module | 30 A |
| 3 | Left Headlight High Beam | 10 A |
| 4 | Ambient Illumination, Front Parking/Side Marker Lights, Instrument Panel Illumination, License Plate Lights, Roof Console Lights, Taillights, Rear Door Ashtray Lights, Rear Map Light Switches, Seat Heater Switch Illumination, Seat Ventilation Control Units, Passenger Compartment Fuse Box No. 2 (Fuse 7) | 15 A |
| 5 | Right Headlight High Beam | 10 A |
| 6 | Right Headlight Low Beam (HID Unit) | 15 A |
| 7 | Back-Up Light, Relay Control Module | 7.5 A |
| 8 | PGM-FI Main Relay 1, Data Link Connector (DLC), PGM-FI Main Relay 2, Crankshaft Position (CKP) Sensor, Camshaft Position (CMP) Sensor, Fuel Injectors, Powertrain Control Module (PCM), Throttle Actuator Control Module Relay | 15 A |
| 9 | Windshield Wiper Motor Relay | 30 A |
| 10 | Headlight Washer Relay | 30 A |
| 11 | 2005–2008: Fog Lights | 20 A |
| 2009–2012: Fog Lights | 10 A | |
| 12 | A/C Compressor Clutch | 7.5 A |
| 13 | Brake Lights, High-Mount Brake Light, Adaptive Cruise Control (2006–2012), Horns, Relay Control Module | 15 A |
| 14 | Rear Window Defogger Relay, Radio Noise Condenser | 40 A |
| 15 | Under-Dash Fuse Box No. 1 (Driver’s Side): Fuses 5, 6, 7, 8, 9; Primary Under-Hood Fuse Box: Fuse 7 (2011–2012) |
40 A |
| 16 | Turn Signal / Hazard Flasher Relay, Multiplex Integrated Control Unit (MICU) | 15 A |
| 17 | VSA Modulator Motor | 30 A |
| 18 | VSA Modulator Control Unit | 40 A |
| 19 | Under-Dash Fuse Box No. 1 (Driver’s Side): Fuses 1, 2, 3, 4 | 40 A |
| 20 | Under-Dash Fuse Box No. 1 (Driver’s Side): Fuses 12, 13, 14, 15, 16, 17 | 40 A |
| 21 | Blower Motor Relay | 40 A |
| 22 | Battery, Power Distribution | 120 A |
| Under-Dash Fuse Box No. 1 (Driver’s Side) | 70 A | |
| 23 | Ignition Switch (BAT), Starter Motor (Starter Cut Relays 1, 2) | 50 A |
| Under-Dash Fuse Box No. 1 (Driver’s Side): Fuses 24, 25, 26, 27, 28 | 50 A | |
Secondary Under-Hood Fuse Box
Mounted directly on the battery terminal. Push the locking tabs to open the cover.
1. Radiator Fan Motor (50 A)
Passenger Compartment
General arrangement of electronic control modules in the passenger compartment of the Acura RL (second generation):
| No. | Unit |
|
|
| 1 | Relay Box No. 1 |
| 2 | Combination Switch Control Unit |
| 3 | Gauge Control Unit (Instrument Cluster) |
| 4 | Turn Signal / Hazard Flasher Relay No. 2 |
| 5 | Navigation System Display |
| 6 | Under-Dash Fuse Box No. 2 (Passenger’s Side) |
| 7 | HVAC Blower / Climate Control Motor Relay |
| 8 | Climate Control Module |
| 9 | Audio Control Module |
| 10 | Relay Box No. 2 |
|
|
| 1 | Under-Dash Fuse Box No. 1 (Driver’s Side) |
| 2 | Keyless Access Unit |
| 3 | Adaptive Front Lighting System (AFS) Control Unit |
| Headlight Leveling Control Unit (without AFS) | |
| 4 | Electronically Controlled Power Steering (ECPS) Control Unit |
| 5 | Daytime Running Lights (DRL) Control Module |
| 6 | 2005–2010: Adaptive Cruise Control Module |
| 6 | 2011–2012: Powertrain Control Module (PCM) |
|
|
| 1 | Ignition Switch Control Unit |
| 2 | Immobilizer Control Unit (Receiver) |
| 3 | Power Tilt / Telescopic Steering Control Unit |
| 4 | Radio Frequency (RF) Receiver Module No. 1 |
| 5 | E-Pretensioner Control Module |
| 6 | 2005–2006: IMOES Unit |
| 7 | HandsFreeLink Control Unit |
| 8 | 2009–2012: Relay Box No. 3 |
| 9 | 2005–2010: Powertrain Control Module (PCM) |
| 9 | 2011–2012: Adaptive Cruise Control (ACC) Module |
| 10 | Supplemental Restraint System (SRS) Control Unit |
| 11 | 2007–2012: IMOES Unit |
Under-Dash Fuse Box No. 1 (Driver’s Side)
Located under the dashboard on the driver’s side.
To access the fuses, remove the cover lid. Insert a finger into the notch on the lid, pull it outward, and unhook it from its hinges.
General overview.
| Diagram | ||
|---|---|---|
|
||
| No. | Description | Amps |
| R1 | Turn Signal / Hazard Flasher Relay | |
| R2 | Ignition Coil Relay | |
| R3 | PGM-FI Main Relay No. 1 | |
| R4 | Accessory Power Socket Relay | |
| R5 | PGM-FI Main Relay No. 2 (Fuel Pump Relay) | |
| R6 | - | |
| R7 | Air-Fuel Ratio (A/F) Sensor Relay | |
| R8 | Starter Cut Relay No. 2 | |
| 1 | Electronic Throttle Control System (ETCS) Control Relay | 15 A |
| 2 | Ignition Coil Relay, Ignition Coils | 15 A |
| 3 | Daytime Running Lights (DRL) Control Unit (USA) / DRL Control Relay (Canada) | 10 A |
| 4 | Front Air-Fuel Ratio (A/F) Sensor, Front Secondary Heated Oxygen Sensor (HO2S), Rear Air-Fuel Ratio (A/F) Sensor, Rear Secondary Heated Oxygen Sensor (HO2S) | 15 A |
| 5 | AcuraLink System (XM Receiver), Active Noise Cancellation (ANC) / Active Sound System (2011–2012), Audio Unit, Navigation System, HandsFreeLink Control Unit, OnStar Control Module (2005–2006), Navigation Display (2005–2010) | 7.5 A |
| 6 | Keyless Access System, Footwell Lights, Courtesy Lights, Inner & Outer Door Handle Illumination, Trunk Light, Individual Map Lights, Vanity Mirror Lights, Rear Left & Right Power Window Switches, Driver’s MPCS Unit (2005–2010), Front Passenger’s MPCS Unit (2005–2010), Driver’s & Front Passenger’s Outer Handle Touch Sensors (2005–2010) | 7.5 A |
| 7 | Combination Switch Control Unit, Driver’s Outer Handle Touch Sensor (2011–2012), Gauge Control Unit, Immobilizer Control Unit Receiver, IMOES Unit, Driver’s MPCS Unit, Front Passenger’s MPCS Unit, Front Passenger’s Outer Handle Touch Sensor (2011–2012), Fuel Filler Door Opener Solenoid (2011–2012), Power Seat Control Unit, Power Tilt / Telescopic Steering Module, Multiplex Integrated Control Unit (MICU), Navigation Display Unit, Navigation System Unit, Keyless Access Unit, Ignition Key Light, Adaptive Cruise Control (2006–2012), Fog Light Relay (2011–2012) | 10 A |
| 8 | Power Door Locks, Multiplex Integrated Control Unit (MICU) | 20 A |
| 9 | Accessory Power Sockets, Cigarette Lighter Fuse | 20 A |
| 10 | Occupant Detection System (ODS), Front Passenger’s Airbag Cutoff Indicator, Supplemental Restraint System (SRS) Unit | 7.5 A |
| 11 | 2005–2008: Adaptive Front Lighting System (AFS), Power Rear Sunshade, Windshield Washer Motor, Under-Hood Primary Fuse Box | 7.5 A |
| 2009–2012: Adaptive Front Lighting System (AFS), Power Rear Sunshade, Windshield Washer Motor, Under-Hood Primary Fuse Box | 15 A | |
| 12 | 2005–2008: Tire Pressure Monitoring System (TPMS) | 7.5 A |
| 2009–2012: Rear Seat Heater | 15 A | |
| 13 | Front Passenger’s Power Seat (Recline and Rear Height Adjustment Motors) | 20 A |
| 14 | Driver’s Lumbar Support Motor (2009–2012), Power Seat Control Unit (VMP1) | 20 A |
| 15 | 2005–2008: Driver’s and Front Passenger’s Lumbar Support Motors | 10 A |
| 2009–2012: Tire Pressure Monitoring System (TPMS) | 7.5 A | |
| 16 | Power Seat Control Unit (VMP2) | 20 A |
| 17 | Front Passenger’s Lumbar Support Motor (2009–2012), Front Passenger’s Power Seat (Slide and Front Height Adjustment Motors) | 20 A |
| 18 | Alternator, Electrical Load Detector (ELD), Engine Mount Control Solenoid, EVAP Canister Purge Valve, Powertrain Control Module (PCM), Brake Pedal Position Switch, Steering Angle Sensor (2009–2012), VSA Modulator-Control Unit, Yaw Rate / Lateral Acceleration Sensor (2011–2012) | 15 A |
| 19 | IMOES Unit (2011–2012), Keyless Access Control Unit, Powertrain Control Module (PCM), Fuel Pump Fuse (PGM-FI Main Relay 2) | 20 A |
| 20 | Mass Airflow (MAF) Sensor / Intake Air Temperature (IAT) Sensor, Powertrain Control Module (PCM) | 15 A |
| 21 | Seat Ventilation Units, Automatic Dimming Rearview Mirror, Combination Switch Unit, Driver’s MPCS Unit, Electronically Controlled Power Steering (ECPS) Unit (2011–2012), Gauge Control Module, IMOES Unit, Power Seat Control Unit, Power Tilt / Telescopic Steering Unit, Shift Lock Solenoid, Seat Belt Tension Reducer Solenoids, Tire Pressure Monitoring System (TPMS), AcuraLink XM Receiver, Daytime Running Lights DRL Unit (USA), Navigation Control Unit, Seat Belt Tension Reducer Modules, Under-Hood Fuse Box Relay Control Module, OnStar System (2005–2006) | 10 A |
| 22 | Supplemental Restraint System (SRS) Unit | 10 A |
| 23 | Radiator Fan Control (RFC) Unit Relay, Air-Fuel Ratio (A/F) Sensor Relay | 7.5 A |
| 24 | Left Rear Power Window Switch | 20 A |
| 25 | Power Tilt / Telescopic Steering (Telescopic Motor) | 20 A |
| 26 | Power Tilt / Telescopic Steering (Tilt Motor) | 20 A |
| 27 | Driver’s Power Window Switch / Motor | 30 A |
| 28 | Moonroof Control Motor | 20 A |
| 29 | Adaptive Front Lighting System (AFS), Headlight Leveling (models without AFS; 2007–2012), Power Steering Module, Super Handling-All Wheel Drive (SH-AWD) Control Module, Adaptive Cruise Control (ACC) Module (2006–2012), Millimeter Wave Radar Unit, Adaptive Cruise Control (ACC) Relay (2006–2012) | 7.5 A |
| 30 | A/C Compressor Clutch Relay, Blower Motor Relay, Climate Control Unit, In-Car Temperature Sensor, Rear Seat Heater Relay (2009–2012), Rear Window Defogger Relay, Seat Heater Relay | 7.5 A |
| 31 | 2009–2012: E-Pretensioner Control System | 7.5 A |
| 32 | AcuraLink System (XM Receiver), Active Noise Cancellation (ANC) Rear Microphone (2011–2012), ANC Front Microphone (2011–2012), HandsFreeLink Control Unit, Navigation Display Unit, Key Interlock Solenoid, Hands-Free Microphone, Audio Unit (2005–2010), Navigation Unit, Shift Lock Solenoid, Keyless Access Control Unit, Interface Dial Control Unit, Ignition Switch Control Unit, Active Noise Cancellation Unit (2005–2010), OnStar Control Unit (2005–2006), Accessory Power Socket Relay, Multiplex Integrated Control Unit (MICU) | 10 A |
| 33 | Empty / Not Used | - |
Under-Dash Fuse Box No. 2 (Passenger’s Side)
Located under the dashboard on the passenger’s side.
Remove the cover lid to gain access.
General overview of the fuse box.
| Diagram | ||
|---|---|---|
|
||
| No. | Description | Amps |
| R1 | Headlight Washer Relay | |
| R2 | Electronic Throttle Control System (ETCS) Relay | |
| R3 | Seat Heater Relay | |
| R4 | Fuel Filler Door Opener Relay | |
| 1 | Super Handling-All Wheel Drive (SH-AWD) Control Unit (SH-AWD Relay) | 30 A |
| 2 | Audio System Power Amplifier | 30 A |
| 3 | Front Passenger’s Power Window Switch / Motor | 30 A |
| 4 | E-Pretensioner System Unit | 30 A |
| 5 | Right Rear Power Window Switch | 20 A |
| 6 | Seat Ventilation Fan Motors, Seat Heater Relay | 20 A |
| 7 | Audio System, AFS OFF / VSA OFF Switch, Cable Reel, Climate Control Unit, Center Console Box Light, Coin Pocket Light, Dashboard Illumination Controller, Navigation Display Unit, Hazard Warning Switch / Front Passenger’s Airbag Cutoff Indicator, Glove Box Light, Automatic Transmission Gear Position Indicator Illumination | 7.5 A |
| 8 | 2006–2012: E-Pretensioner System | 30 A |
| 9 | Climate Control Unit, HVAC Fan Control Motor Relay | 7.5 A |
Auxiliary Relay Boxes
Three auxiliary relay boxes are located inside the passenger compartment.
| No. | Description | Amps |
| Relay Box No. 1 | ||
|
||
| R1 | Ignition Relay (IG2 Cut) | - |
| R2 | Ignition Relay (ACC Cut) | - |
| Relay Box No. 2 | ||
|
||
| R1 | Starter Cut Relay No. 1 | - |
| 31 | Ignition Switch (ST), PCM (STS) | 7.5 A |
| 32 | Starter Cut Relay No. 1 | 7.5 A |
| Relay Box No. 3 | ||
|
||
| R1 | Rear Seat Heater Relay | - |
| R2 | Empty / Not Used | - |
Body Electrical & Chassis Components
Location of body electrical components and control modules:
|
|
| 1 | Super Handling-All Wheel Drive (SH-AWD) Relay |
| 2 | Super Handling-All Wheel Drive (SH-AWD) Control Module |
|
|
| 1 | Roof Console |
| 2 | HomeLink Control Unit |
| 3 | Fuel Pump Control Module |
| 4 | 2005–2006: OnStar Control Module |
|
|
| 1 | 2011–2012: Parking and Back-Up Sensor Control Unit |
| 2 | Audio Power Amplifier |
| 3 | Active Noise Cancellation (ANC) / Active Sound Control Module |
| 4 | Tire Pressure Monitoring System (TPMS) Control Unit |
| 5 | Navigation System Control Unit |
|
|
| 1 | Radio Frequency (RF) Receiver Module |
| 2 | Power Rear Sunshade Control Module |
| 3 | AcuraLink (XM Satellite Radio Receiver) |
ecm location