Oem Circuit Diagrams Acura TL IV

Power Distribution

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Power Distribution Circuit Diagram - All Models (Page 10). Scheme 83

Power Distribution Circuit Diagram - All Models (Page 10-1). Scheme 84

Power Distribution Circuit Diagram - All Models (Page 10-2). Scheme 85

Power Distribution Circuit Diagram - All Models (Page 10-3). Scheme 86

Power Distribution Circuit Diagram - All Models (Page 10-4). Scheme 87

Power Distribution Circuit Diagram - All Models (Page 10-5). Scheme 88

Power Distribution Circuit Diagram - All Models (Page 10-6). Scheme 89

Power Distribution Circuit Diagram - All Models (Page 10-7). Scheme 90

Power Distribution Circuit Diagram - All Models (Page 10-8). Scheme 91

Power Distribution Circuit Diagram - All Models (Page 10-9). Scheme 92

Power Distribution Circuit Diagram - All Models (Page 10-10). Scheme 93

Power Distribution Circuit Diagram - All Models (Page 10-11). Scheme 94

Power Distribution Circuit Diagram - All Models (Page 10-12). Scheme 95

Power Distribution Circuit Diagram - All Models (Page 10-13). Scheme 96

Power Distribution Circuit Diagram - All Models (Page 10-14). Scheme 97

Power Distribution Circuit Diagram - All Models (Page 10-15). Scheme 98

Power Distribution Circuit Diagram - All Models (Page 10-16). Scheme 99

Power Distribution Circuit Diagram - All Models (Page 10-17). Scheme 100

Power Distribution Circuit Diagram - Without Keyless Access (Page 10-18). Scheme 101

Power Distribution Circuit Diagram - Without Keyless Access (Page 10-19). Scheme 102

Power Distribution Circuit Diagram - Without Keyless Access (Page 10-20). Scheme 103

Power Distribution Circuit Diagram - Without Keyless Access (Page 10-21). Scheme 104

Power Distribution Circuit Diagram - Without Keyless Access (Page 10-22). Scheme 105

Power Distribution Circuit Diagram - Without Keyless Access (Page 10-23). Scheme 106

Power Distribution Circuit Diagram - Without Keyless Access (Page 10-24). Scheme 107

Power Distribution Circuit Diagram - Without Keyless Access (Page 10-25). Scheme 108

Power Distribution Circuit Diagram - Without Keyless Access (Page 10-26). Scheme 109

Power Distribution Circuit Diagram - Without Keyless Access (Page 10-27). Scheme 110

Power Distribution Circuit Diagram - Without Keyless Access (Page 10-28). Scheme 111

Power Distribution Circuit Diagram - Keyless Access (Page 10-29). Scheme 112

Power Distribution Circuit Diagram - Keyless Access (Page 10-30). Scheme 113

Power Distribution Circuit Diagram - Keyless Access (Page 10-31). Scheme 114

Power Distribution Circuit Diagram - Keyless Access (Page 10-32). Scheme 115

Power Distribution Circuit Diagram - Keyless Access (Page 10-33). Scheme 116

Power Distribution Circuit Diagram - Keyless Access (Page 10-34). Scheme 117

Power Distribution Circuit Diagram - Keyless Access (Page 10-35). Scheme 118

Power Distribution Circuit Diagram - Keyless Access (Page 10-36). Scheme 119

Power Distribution Circuit Diagram - Keyless Access (Page 10-37). Scheme 120

Power Distribution Circuit Diagram - Keyless Access (Page 10-38). Scheme 121

Power Distribution Circuit Diagram - Keyless Access (Page 10-39). Scheme 122

Ground Distribution

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Ground Distribution Circuit Diagram - G1, G2, G3, And G201 (Page 14). Scheme 123

Ground Distribution Circuit Diagram - G202, G204, G653, And G801 (Page 14). Scheme 124

Ground Distribution Circuit Diagram - G101 (Page 14-1). Scheme 125

Ground Distribution Circuit Diagram - G101 (Page 14-2). Scheme 126

Ground Distribution Circuit Diagram - G203 (Page 14-3). Scheme 127

Ground Distribution Circuit Diagram - G301 (Page 14-4). Scheme 128

Ground Distribution Circuit Diagram - G302 (Page 14-5). Scheme 129

Ground Distribution Circuit Diagram - G401 (Page 14-6). Scheme 130

Ground Distribution Circuit Diagram - G401 (Page 14-7). Scheme 131

Ground Distribution Circuit Diagram - G401 (Page 14-8). Scheme 132

Ground Distribution Circuit Diagram - G402 (Page 14-9). Scheme 133

Ground Distribution Circuit Diagram - G403 (Page 14-10). Scheme 134

Ground Distribution Circuit Diagram - G403 (Page 14-11). Scheme 135

Ground Distribution Circuit Diagram - G403 (Page 14-12). Scheme 136

Ground Distribution Circuit Diagram - G404 (Page 14-13). Scheme 137

Ground Distribution Circuit Diagram - G502 (Page 14-13). Scheme 138

Ground Distribution Circuit Diagram - G405 (Page 14-14). Scheme 139

Ground Distribution Circuit Diagram - G501 (Page 14-15). Scheme 140

Ground Distribution Circuit Diagram - G601 (Page 14-16). Scheme 141

Ground Distribution Circuit Diagram - G602 (Page 14-16). Scheme 142

Ground Distribution Circuit Diagram - G603 (Page 14-17). Scheme 143

Ground Distribution Circuit Diagram - G651 (Page 14-18). Scheme 144

Ground Distribution Circuit Diagram - G652 (SH-4WD) (Page 14-18). Scheme 145

Ground Distribution Circuit Diagram - G701 (Page 14-19). Scheme 146

Ground Distribution Circuit Diagram - G702 (Page 14-20). Scheme 147

Splice and Junction Connector Details

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

A/T Park Position Circuit Diagram (A/T) (Page 15). Scheme 148

A/T Reverse Position Circuit Diagram (A/T) (Page 15). Scheme 149

Parking Brake Position Circuit Diagram (Page 15-1). Scheme 150

Back-up Lights Circuit Diagram (A/T) (Page 15-1). Scheme 151

Brake Pedal Position Circuit Diagram (Page 15-2). Scheme 152

Left Turn Signal Circuit Diagram (Page 15-2). Scheme 153

ECM/PCM Controlled Power Source Circuit Diagram (Page 15-3). Scheme 154

ECM/PCM Relays Control Circuit Diagram (Page 15-4). Scheme 155

Engine Speed Pulse Circuit Diagram (Page 15-4). Scheme 156

Ground For ECM/PCM Sensors (SG1) Circuit Diagram (Page 15-5). Scheme 157

Ground For ECM/PCM Sensors (SG2) Circuit Diagram (Page 15-5). Scheme 158

Ground For ECM/PCM Sensors (SG4) Circuit Diagram (Page 15-6). Scheme 159

Ground For ECM/PCM Sensors (SG6) Circuit Diagram (Page 15-6). Scheme 160

Ground For Climate Control Sensors Circuit Diagram (Page 15-7). Scheme 161

Illumination (Positive) Circuit Diagram (Page 15-8). Scheme 162

Illumination (Positive) Circuit Diagram (Page 15-9). Scheme 163

Illumination (Positive) Circuit Diagram (Page 15-10). Scheme 164

Illumination (Negative) Circuit Diagram - LEDs (Page 15-11). Scheme 165

Illumination (Negative) Circuit Diagram - LEDs (Page 15-12). Scheme 166

Illumination (Negative) Circuit Diagram - LEDs (Page 15-13). Scheme 167

Illumination (Negative) Circuit Diagram - LEDs (Page 15-14). Scheme 168

Power Source For ECM/PCM Circuit Diagram (Page 15-15). Scheme 169

Reference Voltage For Climate Control Sensors Circuit Diagram (Page 15-16). Scheme 170

Reference Voltage For ECM/PCM Sensors (VCC1) Circuit Diagram (Page 15-16). Scheme 171

Reference Voltage For ECM/PCM Sensors (VCC2) Circuit Diagram (Page 15-17). Scheme 172

Reference Voltage For ECM/PCM Sensors (VCC4) Circuit Diagram (Page 15-17). Scheme 173

Back-up Lights Circuit Diagram (M/T) (Page 15-18). Scheme 174

Right Turn Signal Circuit Diagram (Page 15-19). Scheme 175

Trunk Switch Position Circuit Diagram (Page 15-19). Scheme 176

Switch Illumination Circuit Diagram (Page 15-20). Scheme 177

DLC (Data Link Connector)

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Data Link Connector Circuit Diagram (Page 16). Scheme 178

Data Link Connector Circuit Diagram (Page 16-1). Scheme 179

Data Link Connector Circuit Diagram (Page 16-2). Scheme 180

Data Link Connector Circuit Diagram (Page 16-3). Scheme 181

Data Link Connector Circuit Diagram (Page 16-4). Scheme 182

Data Link Connector Circuit Diagram (Page 16-5). Scheme 183

Data Link Connector Circuit Diagram (Page 16-6). Scheme 184

Ignition System

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Ignition System Circuit Diagram (Page 20). Scheme 185

Ignition System Circuit Diagram (Page 20-1). Scheme 186

Starting System

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Starting System Circuit Diagram - Without Keyless Access (Page 21). Scheme 187

Starting System Circuit Diagram - Without Keyless Access (Page 21-1). Scheme 188

Starting System Circuit Diagram - A/T: Keyless Access (Page 21-2). Scheme 189

Starting System Circuit Diagram - A/T: Keyless Access (Page 21-3). Scheme 190

Starting System Circuit Diagram - A/T: Keyless Access (Page 21-4). Scheme 191

Starting System Circuit Diagram - A/T: Keyless Access (Page 21-5). Scheme 192

Starting System Circuit Diagram - A/T: Keyless Access (Page 21-6). Scheme 193

Starting System Circuit Diagram - A/T: Keyless Access (Page 21-7). Scheme 194

Starting System Circuit Diagram - A/T: Keyless Access (Page 21-8). Scheme 195

Starting System Circuit Diagram - A/T: Keyless Access (Page 21-9). Scheme 196

Starting System Circuit Diagram - A/T: Keyless Access (Page 21-10). Scheme 197

Starting System Circuit Diagram - A/T: Keyless Access (Page 21-11). Scheme 198

Starting System Circuit Diagram - A/T: Keyless Access (Page 21-12). Scheme 199

Starting System Circuit Diagram - A/T: Keyless Access (Page 21-13). Scheme 200

Starting System Circuit Diagram - M/T: Keyless Access (Page 21-14). Scheme 201

Starting System Circuit Diagram - M/T: Keyless Access (Page 21-15). Scheme 202

Starting System Circuit Diagram - M/T: Keyless Access (Page 21-16). Scheme 203

Starting System Circuit Diagram - M/T: Keyless Access (Page 21-17). Scheme 204

Starting System Circuit Diagram - M/T: Keyless Access (Page 21-18). Scheme 205

Starting System Circuit Diagram - M/T: Keyless Access (Page 21-19). Scheme 206

Starting System Circuit Diagram - M/T: Keyless Access (Page 21-20). Scheme 207

Starting System Circuit Diagram - M/T: Keyless Access (Page 21-21). Scheme 208

Starting System Circuit Diagram - M/T: Keyless Access (Page 21-22). Scheme 209

Starting System Circuit Diagram - M/T: Keyless Access (Page 21-23). Scheme 210

Starting System Circuit Diagram - M/T: Keyless Access (Page 21-24). Scheme 211

Remote Starting System Circuit Diagram (Acura Accessory: Without Keyless Access) (Page 21-25). Scheme 212

Remote Starting System Circuit Diagram (Acura Accessory: Without Keyless Access) (Page 21-26). Scheme 213

Remote Starting System Circuit Diagram (Acura Accessory: Without Keyless Access) (Page 21-27). Scheme 214

Remote Starting System Circuit Diagram (Acura Accessory: Without Keyless Access) (Page 21-28). Scheme 215

Remote Starting System Circuit Diagram (Acura Accessory: Without Keyless Access) (Page 21-29). Scheme 216

Remote Starting System Circuit Diagram (Acura Accessory: Without Keyless Access) (Page 21-30). Scheme 217

Remote Starting System Circuit Diagram (Acura Accessory: Without Keyless Access) (Page 21-31). Scheme 218

Remote Starting System Circuit Diagram (Acura Accessory:Keyless Access) (Page 21-32). Scheme 219

Remote Starting System Circuit Diagram (Acura Accessory:Keyless Access) (Page 21-33). Scheme 220

Remote Starting System Circuit Diagram (Acura Accessory:Keyless Access) (Page 21-34). Scheme 221

Remote Starting System Circuit Diagram (Acura Accessory:Keyless Access) (Page 21-35). Scheme 222

Remote Starting System Circuit Diagram (Acura Accessory:Keyless Access) (Page 21-36). Scheme 223

Remote Starting System Circuit Diagram (Acura Accessory:Keyless Access) (Page 21-37). Scheme 224

Remote Starting System Circuit Diagram (Acura Accessory:Keyless Access) (Page 21-38). Scheme 225

Remote Starting System Circuit Diagram (Acura Accessory:Keyless Access) (Page 21-39). Scheme 226

Remote Starting System Circuit Diagram (Acura Accessory:Keyless Access) (Page 21-40). Scheme 227

Remote Starting System Circuit Diagram (Acura Accessory:Keyless Access) (Page 21-41). Scheme 228

Remote Starting System Circuit Diagram (Acura Accessory:Keyless Access) (Page 21-42). Scheme 229

Remote Starting System Circuit Diagram (Acura Accessory:Keyless Access) (Page 21-43). Scheme 230

Remote Starting System Circuit Diagram (Acura Accessory:Keyless Access) (Page 21-44). Scheme 231

Remote Starting System Circuit Diagram (Acura Accessory:Keyless Access) (Page 21-45). Scheme 232

Remote Starting System Circuit Diagram (Acura Accessory:Keyless Access) (Page 21-46). Scheme 233

Remote Starting System Circuit Diagram (Acura Accessory:Keyless Access) (Page 21-47). Scheme 234

Remote Starting System Circuit Diagram (Acura Accessory:Keyless Access) (Page 21-48). Scheme 235

Remote Starting System Circuit Diagram (Acura Accessory:Keyless Access) (Page 21-49). Scheme 236

Charging System

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Charging System Circuit Diagram (Page 22). Scheme 237

Charging System Circuit Diagram (Page 22-1). Scheme 238

Fuel and Emissions

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Fuel And Emissions Circuit Diagram (Page 23). Scheme 239

Fuel And Emissions - PGM-FI System Circuit Diagram (Page 23-1). Scheme 240

Fuel And Emissions - PGM-FI System Circuit Diagram (Page 23-2). Scheme 241

Fuel And Emissions - PGM-FI System Circuit Diagram (Page 23-3). Scheme 242

Electronic Throttle Control System Circuit Diagram (Page 23-4). Scheme 243

Idle Control System Circuit Diagram (Page 23-5). Scheme 244

Fuel Supply System Circuit Diagram ('09: SH-AWD) (Page 23-6). Scheme 245

Fuel Supply System Circuit Diagram ('09: Without SH-AWD; '10-'11) (Page 23-7). Scheme 246

EVAP System Circuit Diagram (Without SH-AWD) (Page 23-8). Scheme 247

EVAP System Circuit Diagram (SH-AWD) (Page 23-9). Scheme 248

EGR System Circuit Diagram (Page 23-10). Scheme 249

Intake Air System Circuit Diagram (Page 23-10). Scheme 250

MIL Circuit Diagram (Page 23-11). Scheme 251

Engine Mount Control System

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Engine Mount Control System Circuit Diagram (Page 30). Scheme 252

VTEC/VTC System

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

VTEC/VTC System Circuit Diagram (Page 31). Scheme 253

Cruise Control

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Cruise Control Circuit Diagram (Page 34). Scheme 254

Cruise Control Circuit Diagram (Page 34-1). Scheme 255

Cruise Control Circuit Diagram (Page 34-2). Scheme 256

Cruise Control Circuit Diagram (Page 34-3). Scheme 257

How the Circuit Works

This vehicle does not use a throttle cable or cruise control actuator to maintain the vehicle speed during the cruise control mode. Instead, a throttle actuator control motor, located on the side of the throttle housing, is used to open and close the throttle plate for routine driving and cruise conditions.

Power Supply

Battery voltage is supplied at all times through fuse 18 (Under-hood) to the ETCS control relay contacts, and through fuse 10 (Under-hood) to the horn relay and to the brake pedal position switch. Battery voltage is also supplied at all times through fuse 15 (Under-hood) to the gauge control module.

With the ignition switch in ON (II) or START (III), (without Keyless Access) or with the Engine Start/Stop Switch in ON mode or START mode (Keyless Access), battery voltage is supplied through fuse 13 (Driver's Under-dash) to the brake pedal position switch and then to the ECM/PCM and through fuse 12 (Driver's Under-dash) to the gauge control module and then to the main switch of the cruise control combination switch.

System Description

When the main switch is pressed, a battery voltage input is removed from the gauge control module, and the cruise control main switch indicator LED illuminates. With the shift lever in D or S (A/T) or with the clutch pedal not pressed (M/T), a path to ground is provided for the device (A/T) or switch input (M/T) to the ECM/PCM. The ECM/PCM detects that the shift lever is in D or S (A/T) or the clutch pedal is not pressed (M/T) through this input, which enables the cruise control.

When the set switch is pressed, a voltage signal is sent to the gauge control module. The gauge control module grounds the cruise control indicator LED, illuminating it. The gauge control module communicates the set signal via multiplex communication lines to the ECM/PCM. Using the vehicle speed input obtained from the output shaft (countershaft) speed sensor, the ECM/PCM sends signals to and receives signals from the TP sensor/throttle actuator, which opens and closes the throttle to maintain the set speed.

When the brake pedal is pressed, battery voltage input is sent to the ECM/PCM through fuse 10 (Under-hood) and the battery voltage input through fuse 13 (Driver's Under-dash) is removed. The ECM/PCM communicates the brake pedal pressed information via multiplex communication lines to the gauge control module, which removes ground from the cruise control indicator LED, turning it off. The information is also used by the ECM/PCM to remove the cruise control system's control of the throttle.

When the resume switch is pressed, a voltage signal is sent to the gauge control module. The gauge control module grounds the cruise control indicator LED, illuminating it. The gauge control module communicates the resume signal via multiplex communication lines to the ECM/PCM. Using the vehicle speed input obtained from the output shaft (countershaft) speed sensor, the ECM/PCM sends signals to, and receives signals from, the TP sensor/throttle actuator, which opens and closes the throttle to resume and maintain the previously set speed.

When the cancel switch is pressed, two voltage signals are sent to the gauge control module. The gauge control module removes ground from the cruise control indicator LED, turning it off. The gauge control module communicates the cancel signal via multiplex communication lines to the ECM/PCM. The information is also used by the ECM/PCM to remove the cruise control system's control of the throttle.

Refer to the CRUISE CONTROL SYSTEMS for specific tests or troubleshooting procedures.

VSA

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

VSA Circuit Diagram (Page 36). Scheme 258

VSA Circuit Diagram (Page 36-1). Scheme 259

VSA Circuit Diagram (Page 36-2). Scheme 260

VSA Circuit Diagram (Page 36-3). Scheme 261

VSA Circuit Diagram (Page 36-4). Scheme 262

VSA Circuit Diagram (Page 36-5). Scheme 263

SH-AWD (Super Handling All-Wheel Drive)

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

SH-AWD (Super Handling All-Wheel Drive) Circuit Diagram (Page 37). Scheme 264

SH-AWD (Super Handling All-Wheel Drive) Circuit Diagram (Page 37-1). Scheme 265

SH-AWD (Super Handling All-Wheel Drive) Circuit Diagram (Page 37-2). Scheme 266

Reverse Lockout System

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Reverse Lockout System Circuit Diagram - M/T (Page 38). Scheme 267

A/T Controls

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Reverse Lockout System Circuit Diagram - A/T Controls (Page 39). Scheme 268

Reverse Lockout System Circuit Diagram - A/T Controls (Page 39-1). Scheme 269

Reverse Lockout System Circuit Diagram - A/T Controls (Page 39-2). Scheme 270

Reverse Lockout System Circuit Diagram - A/T Controls (Page 39-3). Scheme 271

Reverse Lockout System Circuit Diagram - A/T Controls (Page 39-4). Scheme 272

Reverse Lockout System Circuit Diagram - A/T Controls (Page 39-5). Scheme 273

Horns

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Horn Circuit Diagram (Page 40). Scheme 274

EPS

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

EPS Circuit Diagram (Page 45). Scheme 275

EPS Circuit Diagram (Page 45-1). Scheme 276

EPS Circuit Diagram (Page 45-2). Scheme 277

SRS

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

SRS Circuit Diagram (Page 47). Scheme 278

SRS Circuit Diagram (Page 47-1). Scheme 279

SRS Circuit Diagram (Page 47-2). Scheme 280

SRS Circuit Diagram (Page 47-3). Scheme 281

Multiplex Integrated Control System

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Multiplex Integrated Control System Circuit Diagram - Power, Grounds, And Diagnostics (Page 50). Scheme 282

Multiplex Integrated Control System Circuit Diagram - Power, Grounds, And Diagnostics (Page 50-1). Scheme 283

Multiplex Integrated Control System Circuit Diagram - B-CAN Communication Line (High) (Page 50-2). Scheme 284

Multiplex Integrated Control System Circuit Diagram - B-CAN Communication Line (Low) (Page 50-3). Scheme 285

Multiplex Integrated Control System Circuit Diagram - B-CAN Communication Line (Low) (Page 50-4). Scheme 286

Multiplex Integrated Control System Circuit Diagram - B-CAN Communication Line (Low) (Page 50-5). Scheme 287

Multiplex Integrated Control System Circuit Diagram - F-CAN Communication Line (High) (Page 50-6). Scheme 288

Multiplex Integrated Control System Circuit Diagram - F-CAN Communication Line (High) (Page 50-7). Scheme 289

Multiplex Integrated Control System Circuit Diagram - F-CAN Communication Line (Low) (Page 50-8). Scheme 290

Multiplex Integrated Control System Circuit Diagram - F-CAN Communication Line (Low) (Page 50-9). Scheme 291

Multiplex Integrated Control System Circuit Diagram - K-line Communication Line (Page 50-10). Scheme 292

Multiplex Integrated Control System Circuit Diagram - UART Communication Line (Page 50-11). Scheme 293

Multiplex Integrated Control System Circuit Diagram - GA-NET Bus (Without XM Radio) (Page 50-12). Scheme 294

Multiplex Integrated Control System Circuit Diagram - GA-NET Bus (XM Radio Without Navigation) (Page 50-13). Scheme 295

Multiplex Integrated Control System Circuit Diagram - GA-NET Bus (Navigation With XM Radio) (Page 50-14). Scheme 296

Multiplex Integrated Control System Circuit Diagram - GA-NET Bus (Navigation With AcuraLink) (Page 50-15). Scheme 297

Multiplex Integrated Control System Circuit Diagram - GA-NET Audio (Without XM Radio) (Page 50-16). Scheme 298

Multiplex Integrated Control System Circuit Diagram - GA-NET Audio (XM Radio Without Navigation) (Page 50-17). Scheme 299

Multiplex Integrated Control System Circuit Diagram - GA-NET Audio (Navigation With XM Radio) (Page 50-18). Scheme 300

Multiplex Integrated Control System Circuit Diagram - GA-NET Audio (Navigation With AcuraLink) (Page 50-19). Scheme 301

The multiplex integrated control system sends digital signals between control units through shared wires to reduce the number of wires in order to make harnesses lighter.

The input signals from each switch are converted to digital signals within the receiving control unit. The digital signals are sent from one control unit to another as serial data over dedicated communication lines. When the appropriate control unit receives the digital signal, it converts the signal back to an operational command, such as operating a relay. The multiplex integrated control system schematic shows its power, grounds, and communication lines.

There are two different networks within the multiplex integrated control system

1. Body Controller Area Network (B-CAN)
2. Fast Controller Area Network (F-CAN)

The body controller area network (B-CAN) and fast controller area network (F-CAN) share information between multiple electronic control units and work together to form the multiplex integrated control system.

The gauge control module translates information from B-CAN to F-CAN and from F-CAN to B-CAN to allow the networks to share information.

B-CAN Network

B-CAN information is transmitted across the communication lines at a slower speed for convenience related operations that do not require a high process speed.

The following systems are related to the B-CAN network

1. AcuraLink
2. Audio System
3. DPMS
4. Entry Light Control System
5. Exterior Lights
6. Gauges and Indicators
7. HandsFreeLink
8. Horns
9. HVAC
10. Immobilizer System
11. Interior Lights
12. Interlock System
13. Keyless Access System
14. Moonroof
15. Keyless/Power Door Locks/Security System
16. Power Windows
17. Reminder Systems
18. Safety Indicator
19. Wiper/Washer

F-CAN Network

F-CAN information is transmitted across the communication lines at a faster speed for "real time" functions such as fuel, emissions, and traction control data. The following control units operate on the F-CAN network

1. AcuraLink Control Unit
2. Audio-Navigation Unit
3. DLC
4. EPS Control Unit
5. Gauge Control Module
6. ECM/PCM
7. SRS Unit
8. TPMS Control Unit
9. VSA Modulator-Control Unit
10. Yaw Rate-Lateral Acceleration Sensor (without SH-AWD)
11. Yaw Rate-Lateral\Longitudinal Acceleration Sensor (SH-AWD)

Refer to the MULTIPLEX INTEGRATED CONTROL SYSTEM for testing and troubleshooting procedures.

HVAC

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

HVAC Circuit Diagram (Page 60). Scheme 302

HVAC Circuit Diagram (Page 60-1). Scheme 303

HVAC Circuit Diagram (Page 60-2). Scheme 304

HVAC Circuit Diagram (Page 60-3). Scheme 305

HVAC Circuit Diagram (Page 60-4). Scheme 306

Fans

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Fan Circuit Diagram (Page 63). Scheme 307

Fan Circuit Diagram (Page 63-1). Scheme 308

Fan Circuit Diagram (Page 63-2). Scheme 309

Battery voltage is supplied at all times through Multi-fuse 3 (Under-hood) to the contacts of the A/C Condenser Fan Relay and Radiator Fan Relay respectively. With the ignition switch in ON (II), (without Keyless Access) or the Engine Start/Stop Switch in ON mode (Keyless Access), battery voltage is supplied through fuse 16 (Driver's Under-dash) to the coils of the A/C Condenser Fan Relay and Fan Control Relay. With the engine running, battery voltage is supplied through fuse 21 (Under-hood) to the Radiator Fan Relay coil.

Extremely High Coolant Temperatures

In extremely high coolant temperature conditions (above 206°F (97°C)), the ECM/PCM provides ground to the coils of the A/C Condenser Fan Relay, the Radiator Fan Relay, and the Fan Control Relay, energizing them. Battery voltage is supplied to the A/C Condenser Fan Motor and Radiator Fan Motor through their respective energized relays, which activates the motors at high speed.

A/CON

The ECM/PCM detects that the A/C is ON through an input from the A/C Pressure Sensor. Upon receiving the A/C ON information, the ECM/PCM provides ground to the coil of the Radiator Fan Relay, energizing it. Battery voltage is supplied to the A/C Condenser Fan Motor and Radiator Fan Motor in series through the energized relay, which activates the motors at low speed.

If the refrigerant pressure rises above 1520 kPa (221 psi), the A/C Pressure Sensor signals the ECM/PCM to run the fans at high speed. The ECM/PCM provides ground to the coils of the A/C Condenser Fan Relay, the Radiator Fan Relay, and the Fan Control Relay, energizing them. Battery voltage is supplied to the A/C Condenser Fan Motor and Radiator Fan Motor through their respective energized relays, which activates the motors at high speed.

Refrigerant at Low Pressure

If the refrigerant pressure drops below 196 kPa (28 psi), the A/C Pressure Sensor signals the ECM/PCM to turn off the fans. Upon receiving the signal to turn off the fans, the ECM/PCM removes ground from the coil of the Radiator Fan Relay, deenergizing it. This removes battery voltage from the A/C Condenser Fan Motor and Radiator Fan Motor, which deactivates the motors.

Refrigerant at High Pressure

If the refrigerant pressure rises above 3140 kPa (455 psi), the A/C Pressure Sensor signals the ECM/PCM to turn off the fans. Upon receiving the signal to turn off the fans, the ECM/PCM removes ground from the coils of the A/C Condenser Fan Relay, the Radiator Fan Relay, and the Fan Control Relay, deenergizing them. This removes battery voltage from the A/C Condenser Fan Motor and Radiator Fan Motor, which deactivates the motors.

Refer to the FAN CONTROLS for specific tests and troubleshooting procedures.

Rear Window/Power Mirror Defoggers

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Rear Window/Power Mirror Defoggers Circuit Diagram (Page 64). Scheme 310

Rear Window/Power Mirror Defoggers Circuit Diagram (Page 64-1). Scheme 311

Rear Window Defogger

Battery voltage is supplied at all times to the Rear Window Defogger Relay contacts through fuse 4 (Under-hood). With the ignition switch in ON (II), (without Keyless Access) or the Engine Start/Stop Switch in ON mode (Keyless Access), battery voltage is supplied to the Rear Window Defogger Relay coil and to the Climate Control Unit through fuse 16 (Driver's Under-dash).

When the Rear Window/Power Mirror Defoggers Switch (in the Climate Control Unit) is pressed, the defog signal is sent to the Driver's MICU. The Driver's MICU provides ground to the Rear Window Defogger Relay coil, energizing the relay. Battery voltage is supplied to the Rear Window Defogger through the energized relay.

The Rear Window Defogger is turned off by pressing the Rear Window/Power Mirror Defoggers Switch a second time or by turning the ignition switch to LOCK (0), (without Keyless Access) or the Engine Start/Stop Switch in OFF mode (Keyless Access).

Power Mirror Defoggers

Battery voltage is supplied at all times to the Front Passenger's Power Window Switch through fuse 13 (Passenger's Under-dash). With the ignition switch in ON (II), (without Keyless Access) or the Engine Start/Stop Switch in ON mode (Keyless Access), battery voltage is supplied to the Power Window Master Switch and to the Climate Control Unit through fuse 16 (Driver's Under-dash).

When the Rear Window/Power Mirror Defoggers Switch (in the Climate Control Unit) is pressed, the defog signal is sent to the Power Window Master Switch via B-CAN and then to the Front Passenger's Power Window Switch via UART. The Power Window Master Switch supplies battery voltage to the Left Power Mirror Defogger, and the Front Passenger's Power Window Switch supplies battery voltage to the Right Power Mirror Defogger.

The Power Mirror Defoggers are turned off by pressing the Rear Window/Power Mirror Defoggers Switch a second time or by turning the ignition switch to LOCK (0), (without Keyless Access) or the Engine Start/Stop Switch in OFF mode (Keyless Access).

Refer to the REAR WINDOW DEFOGGER for specific tests and troubleshooting procedures.

Reminder Systems, Safety Indicator, Key Light Timer, and Low Oil Pressure Indicator

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Reminder Systems, Safety Indicator, Key Light Timer, And Low Oil Pressure Indicator Circuit Diagram - Without Keyless Access (Page 73). Scheme 312

Reminder Systems, Safety Indicator, Key Light Timer, And Low Oil Pressure Indicator Circuit Diagram - Without Keyless Access (Page 73-1). Scheme 313

Reminder Systems, Safety Indicator, Key Light Timer, And Low Oil Pressure Indicator Circuit Diagram - Without Keyless Access (Page 73-2). Scheme 314

Reminder Systems, Safety Indicator, Key Light Timer, And Low Oil Pressure Indicator Circuit Diagram - Keyless Access (Page 73-3). Scheme 315

Reminder Systems, Safety Indicator, Key Light Timer, And Low Oil Pressure Indicator Circuit Diagram - Keyless Access (Page 73-4). Scheme 316

Reminder Systems, Safety Indicator, Key Light Timer, And Low Oil Pressure Indicator Circuit Diagram - Keyless Access (Page 73-5). Scheme 317

Gauges and Indicators

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Gauges And Indicator Circuit Diagram (Page 80). Scheme 318

Gauges And Indicator Circuit Diagram (Page 80-1). Scheme 319

Gauges And Indicator Circuit Diagram (Page 80-2). Scheme 320

Gauges And Indicator Circuit Diagram (Page 80-3). Scheme 321

Gauges And Indicator Circuit Diagram (Page 80-4). Scheme 322

The gauges and indicators are part of the multiplex integrated control system. Some indicators are controlled by conditions in their specific systems. Information for these indicators is communicated from control unit to control unit across multiplex communication lines. The following indicators are communicated to the gauge control module through the multiplex integrated control system

1. ABS Indicator
2. Brake System Indicator
3. Charging System Indicator
4. Cruise Control Indicator
5. Cruise Control Main Switch Indicator
6. Door Open Indicator/Trunk Lid Open Indicator
7. EPS Indicator
8. Fog Light Indicator
9. High Beam Indicator
10. Immobilizer System Indicator
11. Keyless Access Indicator
12. Lights On Indicator
13. Low Fuel Indicator
14. Low Oil Pressure Indicator
15. Low Tire Pressure Indicator/TPMS Indicator
16. Message Indicator
17. MIL Indicator
18. Seat Belt Reminder Indicator
19. Security Indicator
20. SH-AWD Indicator
21. Side Airbag Cut-off Indicator
22. SRS Indicator
23. VSA System Indicator
24. VSA Activation Indicator ('09)
25. VSA OFF Indicator ('10-'11)

Refer to each individual system for more information. Also refer to the Multiplex Integrated Control System for more multiplex information.

Engine Coolant Temperature Gauge

The control circuits built into the gauge control module controls the engine coolant temperature gauge. The ECM/PCM provides engine coolant temperature information to the control circuits area network controller through the fast controller area network (F-CAN) data lines. The ECM/PCM receives engine coolant temperature information from the two ECT sensors.

Fuel Gauge and Low Fuel Indicator

The fuel gauge and low fuel indicator are controlled by the control circuits in the gauge control module. When the resistance of the fuel gauge sending unit changes, the control circuits in the gauge control module sends a signal through a dedicated data line to the fuel gauge in the gauge control module to display fuel level. When it is determined that the fuel level is low, the low fuel level indicator is activated.

Speedometer

The speedometer is controlled by the control circuits in the gauge control module. The control circuits in the gauge control module receives vehicle speed information from the ECM/PCM through the fast controller area network (F-CAN) data lines. The control circuits sends vehicle speed information through a dedicated data line to the speedometer in the gauge control module, which displays the vehicle speed.

Tachometer

The tachometer is controlled by the control circuits in the gauge control module. The control circuits in the gauge control module receives engine speed information from the ECM/PCM through the fast controller area network (F-CAN) data lines. The control circuits controls the tachometer display.

TPMS (Tire Pressure Monitoring System)

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

TPMS (Tire Pressure Monitoring System) Circuit Diagram (Page 85-1). Scheme 323

TPMS (Tire Pressure Monitoring System) Circuit Diagram (Page 85-1). Scheme 324

A/T Gear Position Indicator

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

A/T Gear Position Indicator Circuit Diagram (Page 89). Scheme 325

A/T Gear Position Indicator Circuit Diagram (Page 89-1). Scheme 326

With the ignition switch in ON (II) or START (III), (without Keyless Access) or the Engine Start/Stop Switch in ON mode or START mode (Keyless Access), voltage is applied to the A/T gear position indicator. The transmission range switch provides a ground for each position. As an input is grounded, its indicator is lit. If you select R, for example, ground will be applied to the input of the A/T gear position indicator, and the R indicator will light.

When the ECM/PCM detects an abnormality in the automatic transmission control system, or when you request DTCs (diagnostic trouble codes) through the DLC (data link connector), the ECM/PCM will cause the D indicator to blink.

Refer to the A/T INTERLOCK SYSTEM for specific tests and troubleshooting procedures.

Wiper/Washer

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Wiper/Washer Circuit Diagram(Page 91). Scheme 327

Wiper/Washer Circuit Diagram(Page 91-1). Scheme 328

Wiper/Washer Circuit Diagram(Page 91-2). Scheme 329

The wiper/washer system is part of the multiplex integrated control system. The Driver's MICU, Passenger's MICU, and the Wiper/Washer Switch are the main operation controls of the wiper/washer system. The Windshield Wiper Relay, Intermittent Wiper Relay, and Windshield Wiper High/Low Relay are incorporated in the Under-hood Fuse/Relay Box.

Testing the multiplex components and reading the Diagnostic Trouble Codes (DTCs) can be done by using an HDS Tester. The Windshield Wiper Motor and Windshield Washer Motor can be tested manually without an HDS Tester.

Refer to the WIPER SYSTEM & WASHER SYSTEM for specific tests and troubleshooting procedures.

Battery voltage is supplied at all times to the Windshield Wiper Relay contacts through Multi-fuse 3 (Under-hood). With the ignition switch in ON (II) or START (III), (without Keyless Access) or with the Engine Start/Stop Switch in ON mode or START mode (Keyless Access), battery voltage is supplied to the Driver's MICU and the Passenger's MICU through fuse 12 (Driver's Under-dash). With the ignition switch in ON (II) or START (III), (without Keyless Access) or with the Engine Start/Stop Switch in ON mode or START mode (Keyless Access), battery voltage is also supplied to the Windshield Wiper Relay coil through fuse 4 (Driver's Under-dash) and to the Windshield Washer Relay through fuse 3 (Driver's Under-dash).

Mist

When the Windshield Wiper Switch is moved to MIST, the signal for mist is communicated to the Driver's MICU. The Driver's MICU provides ground to the Intermittent Wiper Relay coil, energizing the relay. Battery voltage is supplied through the energized Intermittent Wiper Relay and the static Windshield Wiper High/Low Relay to the high winding of the Windshield Wiper Motor causing the motor to run in high. As soon as the motor starts running, the mechanical park/run switch built into the motor will move from PARK to RUN. With the motor running, the mechanical park/run switch is in RUN, removing ground from the motor input to the Driver's MICU. If the switch is held in MIST for multiple wiper cycles, the PARK/RUN switch will alternate between PARK and RUN indicating what position the wipers are in to the Driver's MICU.

Intermittent

When the Windshield Wiper Switch is moved to INTERMITTENT, the signal for intermittent and the signal for the intermittent dwell time controller are communicated to the Driver's MICU. The Driver's MICU provides ground to the Intermittent Wiper Relay coil and the Windshield Wiper High/Low Relay coil, energizing the relays. Battery voltage is supplied through the energized Intermittent Wiper Relay and the energized Windshield Wiper High/Low Relay to the low winding of the Windshield Wiper Motor, causing the motor to run in low. As soon as the motor starts running, the mechanical park/run switch built into the motor will move from PARK to RUN. With the motor running, the mechanical park/run switch is in RUN, removing ground from the motor input to the Driver's MICU. If the switch is in INTERMITTENT for multiple wiper cycles, the PARK/RUN switch will alternate between PARK and RUN, indicating what position the wipers are in to the Driver's MICU.

Low Speed

When the Windshield Wiper Switch is moved to LOW, the signal for low is communicated to the Driver's MICU. The Driver's MICU provides ground to the Intermittent Wiper Relay coil and the Windshield Wiper High/Low Relay coil, energizing the relays. Battery voltage is supplied through the energized Intermittent Wiper Relay and the energized Windshield Wiper High/Low Relay to the low winding of the Windshield Wiper Motor, causing the motor to run in low. As soon as the motor starts running, the mechanical park/run switch built into the motor will move from PARK to RUN. With the motor running, the mechanical park/run switch is in RUN, removing ground from the motor input to the Driver's MICU. If the switch is in LOW for multiple wiper cycles, the PARK/RUN switch will alternate between PARK and RUN, indicating what position the wipers are in to the Driver's MICU.

When the Windshield Wiper Switch is moved to OFF, the signal for off is communicated to the Driver's MICU. Once the wipers reach the PARK position, the Driver's MICU removes the ground from the Intermittent Wiper Relay, de-energizing the relay. De-energizing the Intermittent Wiper Relay removes battery voltage from the Windshield Wiper Motor.

High Speed

When the Windshield Wiper Switch is moved to HIGH, the signal for high is communicated to the Driver's MICU. The Driver's MICU provides ground to the Intermittent Wiper Relay coil, energizing the relay. Battery voltage is supplied through the energized Intermittent Wiper Relay and the static Windshield Wiper High/Low Relay to the high winding of the Windshield Wiper Motor, causing the motor to run in high. As soon as the motor starts running, the mechanical park/run switch built into the motor will move from PARK to RUN. With the motor running, the mechanical park/run switch is in RUN, removing ground from the motor input to the Driver's MICU. If the switch is in HIGH for multiple wiper cycles, the PARK/RUN switch will alternate between PARK and RUN, indicating what position the wipers are in to the Driver's MICU.

When the Windshield Wiper Switch is moved to OFF, the signal for off is communicated to the Driver's MICU. Once the wipers reach the PARK position, the Driver's MICU removes the ground from the Intermittent Wiper Relay, de-energizing the relay. De-energizing the Intermittent Wiper Relay removes battery voltage from the Winshield Wiper Motor.

Washer

When the Windshield Washer Switch is moved to WASH, the signal for wash is communicated to the Driver's MICU. The Driver's MICU communicates the wash signal via B-CAN to the Passenger's MICU. The Passenger's MICU provides ground to the Windshield Washer Relay coil, energizing the relay. Battery voltage is supplied through the energized Windshield Washer Relay to the Windshield Washer Motor, causing the motor to pump washer fluid onto the windshield. Meanwhile, the Driver's MICU provides ground to the Intermittent Wiper Relay coil, energizing the relay. Battery voltage is supplied through the energized Intermittent Wiper Relay and the static Windshield Wiper High/Low Relay to the high winding of the Windshield Wiper Motor, causing the motor to run in high. As soon as the motor starts running, the mechanical park/run switch built into the motor will move from PARK to RUN.

Refer to the WIPER SYSTEM & WASHER SYSTEM for specific tests and troubleshooting procedures.

Headlight Washer

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Headlight Washer Circuit Diagram(Page 93). Scheme 330

Headlight Washer Circuit Diagram(Page 93-1). Scheme 331

Exterior Lights

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Exterior Lights Circuit Diagram - Headlights (Page 110). Scheme 332

Exterior Lights Circuit Diagram - Headlights (Page 110-1). Scheme 333

Exterior Lights Circuit Diagram - Headlights (Page 110-2). Scheme 334

Without Keyless Access

The Headlights circuit is composed of the Driver's MICU, the Passenger's MICU, the Headlight Switch, the Dimmer/Flash-to-Pass Switch, the Left and Right Headlights, and the High Beam Indicator. The Driver's MICU and Passenger's MICU control the Headlights with built-in Low and High Beam Control Circuits based upon the position of the Headlight Switch and the Dimmer/Flash-to-Pass Switch. The Driver's MICU and the Passenger's MICU communicate Headlights information directly between each other and via B-CAN.

Low Beams

When the Headlight Switch is moved to the ON position with the Dimmer/Flash-to-Pass Switch in the LOW position, a ground signal is supplied to terminal R8 of the Driver's MICU. The Driver's MICU and the Passenger's MICU activate their Low Beam Control Circuits, supplying battery voltage to the Low Beam Headlights, causing them to come on.

High Beams

When the Headlight Switch is moved to the ON position with the Dimmer/Flash-to-Pass Switch in the HIGH position, ground signals are supplied to terminals R8 and R22 of the Driver's MICU. The Driver's MICU and the Passenger's MICU activate their Low and High Beam Control Circuits, supplying battery voltage to the Low and High Beam Headlights, causing them to come on.

Flash-to-Pass

When the Dimmer/Flash-to-Pass Switch is moved to the PASSING position, a ground signal is supplied to terminal R21 of the Driver's MICU. The Driver's MICU and the Passenger's MICU activate their Low and High Beam Control Circuits for as long as the switch is held, supplying battery voltage to the Low and High Beam Headlights, causing them to come on.

Daytime Running Lights (DRL)

The DRL circuit is composed of the Driver's MICU, the Passenger's MICU, the Left and Right Headlights, and the DRL Indicator. The DRL circuit operates with the Ignition Switch in ON (II), the Headlights off (Headlight Switch in OFF or in PARKING position), and the Parking Brake released.

When the DRL circuit is on, the Driver's MICU and the Passenger's MICU activate their High Beam Control Circuits on and off (duty cycle), which provides a reduced voltage (approximately 6-8 volts) to the High Beam Headlights. This reduced voltage causes the High Beam Headlights to come on with a reduced brightness. The DRL Indicator also illuminates.

Note. The DRL circuit is disabled when the Ignition Switch is turned to OFF (0). To keep the DRL circuit from coming on, apply the Parking Brake while the Ignition Switch is in OFF (0). When the Ignition Switch is turned back to ON (II), the DRL circuit will not come on until the Parking Brake is released. The Headlights revert back to normal operation when the Headlight Switch is moved to the ON position.

Automatic Lighting

When the Headlight Switch is in the AUTO position, the Driver's MICU and Passenger's MICU receive an automatic lighting signal. When the Automatic Lighting Sensor detects low ambient light, a lights-on signal is transmitted to the Driver's MICU and the Passenger's MICU. The Driver's MICU and the Passenger's MICU activate their Low Beam Control Circuits, supplying battery voltage to the Low Beam Headlights, causing them to come on.

Refer to the EXTERIOR LIGHTS for specific tests and troubleshooting procedures.

Works Keyless Access

The Headlights circuit is composed of the Driver's MICU, the Passenger's MICU, the Headlight Switch, the Dimmer/Flash-to-Pass Switch, the Left and Right Headlights, and the High Beam Indicator. The Driver's MICU and Passenger's MICU control the Headlights with built-in Low and High Beam Control Circuits based upon the position of the Headlight Switch and the Dimmer/Flash-to-Pass Switch. The Driver's MICU and the Passenger's MICU communicate Headlights information directly between each other and via B-CAN.

When the Headlight Switch is moved to the ON position with the Dimmer/Flash-to-Pass Switch in the LOW position, a ground signal is supplied to terminal R8 of the Driver's MICU. The Driver's MICU and the Passenger's MICU activate their Low Beam Control Circuits, supplying battery voltage to the Low Beam Headlights, causing them to come on.

When the Headlight Switch is moved to the ON position with the Dimmer/Flash-to-Pass Switch in the HIGH position, ground signals are supplied to terminals R8 and R22 of the Driver's MICU. The Driver's MICU and the Passenger's MICU activate their Low and High Beam Control Circuits, supplying battery voltage to the Low and High Beam Headlights, causing them to come on.

When the Dimmer/Flash-to-Pass Switch is moved to the PASSING position, a ground signal is supplied to terminal R21 of the Driver's MICU. The Driver's MICU and the Passenger's MICU activate their Low and High Beam Control Circuits for as long as the switch is held, supplying battery voltage to the Low and High Beam Headlights, causing them to come on.

The DRL circuit is composed of the Driver's MICU, the Passenger's MICU, the Left and Right Headlights, and the DRL Indicator. The DRL circuit operates with the Engine Start/Stop Switch in the ON mode (Keyless Access), the Headlights off (Headlight Switch in OFF or in PARKING position), and the Parking Brake released.

When the DRL circuit is on, the Driver's MICU and the Passenger's MICU activate their High Beam Control Circuits on and off (duty cycle), which provides a reduced voltage (approximately 6-8 volts) to the High Beam Headlights. This reduced voltage causes the High Beam Headlights to come on with a reduced brightness. The DRL Indicator also illuminates.

Note. The DRL circuit is disabled when the Engine Start/Stop Switch is in the OFF mode. To keep the DRL circuit from coming on, apply the Parking Brake while the Engine Start/Stop Switch is in the OFF mode. When the Engine Start/Stop Switch is turned back to the ON mode, the DRL circuit will not come on until the Parking Brake is released. The Headlights revert back to normal operation when the Headlight Switch is moved to the ON position.

When the Headlight Switch is in the AUTO position, the Driver's MICU and Passenger's MICU receive an automatic lighting signal. When the Automatic Lighting Sensor detects low ambient light, a lights-on signal is transmitted to the Driver's MICU and the Passenger's MICU. The Driver's MICU and the Passenger's MICU activate their Low Beam Control Circuits, supplying battery voltage to the Low Beam Headlights, causing them to come on.

Refer to the EXTERIOR LIGHTS for specific tests and troubleshooting procedures.

Exterior Lights Circuit Diagram - License Plate, Parking, Side Marker Lights, And Taillights (Page 110-5). Scheme 335

Exterior Lights Circuit Diagram - License Plate, Parking, Side Marker Lights, And Taillights (Page 110-6). Scheme 336

Exterior Lights Circuit Diagram - License Plate, Parking, Side Marker Lights, And Taillights (Page 110-7). Scheme 337

Exterior Lights Circuit Diagram - Brake Lights (Page 110-8). Scheme 338

Exterior Lights Circuit Diagram - Turn Signal And Hazard Warning Lights (Page 110-9). Scheme 339

Exterior Lights Circuit Diagram - Turn Signal And Hazard Warning Lights (Page 110-10). Scheme 340

Exterior Lights Circuit Diagram - Back-Up Lights (A/T) (Page 110-11). Scheme 341

Exterior Lights Circuit Diagram - Back-up Lights (M/T) (Page 110-12). Scheme 342

Exterior Lights Circuit Diagram - Fog Lights (Page 110-13). Scheme 343

Exterior Lights Circuit Diagram - Fog Lights (Page 110-14). Scheme 344

Interior Lights

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Interior Lights Circuit Diagram - Ambient Light, Front Individual Map Lights, Ignition Key Light, Rear Individual Map Lights, And Remote Slot Light (Page 114). Scheme 345

Interior Lights Circuit Diagram - Ambient Light, Front Individual Map Lights, Ignition Key Light, Rear Individual Map Lights, And Remote Slot Light (Page 114-1). Scheme 346

Interior Lights Circuit Diagram - Ambient Light, Front Individual Map Lights, Ignition Key Light, Rear Individual Map Lights, And Remote Slot Light (Page 114-2). Scheme 347

Interior Lights Circuit Diagram - Trunk Light (Page 114-3). Scheme 348

Interior Lights Circuit Diagram - Door Courtesy Lights (Page 114-4). Scheme 349

Interior Lights Circuit Diagram - Vanity Mirror Lights (Page 114-5). Scheme 350

Interior Lights Circuit Diagram - Dash And Console Lights (Page 114-6). Scheme 351

Interior Lights Circuit Diagram - Dash And Console Lights (Page 114-7). Scheme 352

Interior Lights Circuit Diagram - Dash And Console Lights (Page 114-8). Scheme 353

Interior Lights Circuit Diagram - Dash And Console Lights (Page 114-9). Scheme 354

Interior Lights Circuit Diagram - Dash And Console Lights (Page 114-10). Scheme 355

Interior Lights Circuit Diagram - Dash And Console Lights (Page 114-11). Scheme 356

Interior Lights Circuit Diagram - Dash And Console Lights (Page 114-12). Scheme 357

Interior Lights Circuit Diagram - Dash And Console Lights (Page 114-13). Scheme 358

Interior Lights Circuit Diagram - Dash And Console Lights (Page 114-14). Scheme 359

Entry Light Control System

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Entry Light Control System Circuit Diagram (Page 115). Scheme 360

Entry Light Control System Circuit Diagram (Page 115-1). Scheme 361

Entry Light Control System Circuit Diagram (Page 115-2). Scheme 362

Entry Light Control System Circuit Diagram (Page 115-3). Scheme 363

Entry Light Control System Circuit Diagram (Page 115-4). Scheme 364

Power Windows

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Power Windows Circuit Diagram (Page 120). Scheme 365

Power Windows Circuit Diagram (Page 120-1). Scheme 366

Power Windows Circuit Diagram (Page 120-2). Scheme 367

Power Windows Circuit Diagram (Page 120-3). Scheme 368

The power windows system is a multiplex controlled system. The power window master switch and the front passenger's, left rear, and right rear power window switches are the main operational controls of the power windows system. Both the power window master switch and the front passenger's power window switch contain a control unit.

Reversible electric motors drive the power windows. Each motor is protected by a non-serviceable, built-in circuit breaker. The circuit breaker will reset automatically as it cools.

Battery voltage is supplied at all times to the power window master switch through fuses 15 (Under-hood) and 24 (Driver's Under-dash) and to the front passenger's power window switch through fuse 13 (Passenger's Under-dash). Battery voltage is also supplied at all times to the left and right rear power window relays through fuse 22 (Driver's Under-dash) and fuse 11 (Passenger's Under-dash) respectively. With the ignition switch in ON (II), (without Keyless Access) or the Engine Start/Stop Switch in ON mode (Keyless Access), battery voltage is supplied to the power window master switch through fuse 16 (Driver's Under-dash).

When the main switch is ON, the left and right rear power window relays are energized providing battery voltage to the left and right rear power window switches.

The windows and the main switch will operate for up to ten minutes after the Ignition Switch is turned OFF (0) (without Keyless Access) or the Engine Start/Stop Switch is put into OFF mode (Keyless Access). Opening either front door will cancel this function.

Driver's Window

When the driver's switch of the power window master switch is pushed to DOWN or pulled to UP, the signal for down or up is sent to the control unit. The control unit provides power and ground to the driver's power window motor, lowering or raising the window until the switch is released.

When the driver's switch is pushed to AUTO DOWN or pulled to AUTO UP, the signal for auto down or auto up is sent to the control unit. The control unit provides power and ground to the driver's power window motor, lowering or raising the window. As the window descends or ascends, the pulser in the driver's power window motor sends pulsing signals to the control unit. When the window reaches the fully down or fully up position, the pulsing signal stops, and the control unit removes power and ground from the driver's power window motor. If something obstructs the window during the AUTO UP operation, the control unit will detect no pulses from the pulser. For safety reasons, the control unit will make the driver's power window motor stop immediately and reverse.

All Passenger Windows

All windows can be opened and closed by the power window master switch. The passenger windows are disabled when the main switch is OFF. The driver's power window motor remains operable when the main switch is OFF.

Front Passenger's Window

When the front passenger's switch of the front passenger's power window switch is pushed to DOWN or pulled to UP, the signal for down or up is sent to the control unit. The control unit provides power and ground to the front passenger's power window motor lowering or raising the window until the switch is released.

When the front passenger's switch is pushed to AUTO DOWN or pulled to AUTO UP, the signal for auto down or auto up is sent to the control unit. The control unit provides power and ground to the front passenger's power window motor, lowering or raising the window. As the window descends or ascends, the pulser in the front passenger's power window motor sends pulsing signals to the control unit. When the window reaches the fully down or fully up position, the pulsing signal stops, and the control unit removes power and ground from the front passenger's power window motor. If something obstructs the window during the AUTO UP operation, the control unit will detect no pulses from the pulser. For safety reasons, the control unit will make the front passenger's power window motor stop immediately and reverse.

When the front passenger's window is opened or closed from the power window master switch, the control unit communicates that command via a multiplexed signal to the front passenger's power window switch.

Left Rear Window

When the left rear power window switch is pushed to DOWN, power is supplied to the coil of the left rear power window switch down relay, energizing it. Battery voltage is supplied to the left rear power window motor through the energized relay. A path to ground for the motor is provided by the left rear power window switch up relay, lowering the window until the switch is released or the window is fully lowered.

When the left rear power window switch is pulled to UP, power is supplied to the coil of the left rear power window switch up relay, energizing it. Battery voltage is supplied to the left rear power window motor through the energized relay. A path to ground for the motor is provided by the left rear power window switch down relay, raising the window until the switch is released or the window is fully lowered.

When the left rear window is opened or closed from the power window master switch, the control unit sends signals to the relays within the left rear power window switch.

Right Rear Window

When the right rear power window switch is pushed to DOWN, power is supplied to the coil of the right rear power window switch down relay, energizing it. Battery voltage is supplied to the right rear power window motor through the energized relay. A path to ground for the motor is provided by the right rear power window switch up relay, lowering the window until the switch is released or the window is fully lowered.

When the right rear power window switch is pulled to UP, power is supplied to the coil of the right rear power window switch up relay, energizing it. Battery voltage is supplied to the right rear power window motor through the energized relay. A path to ground for the motor is provided by the right rear power window switch down relay, raising the window until the switch is released or the window is fully lowered.

When the right rear window is opened or closed from the power window master switch, the control unit sends signals to the relays within the right rear power window switch.

Remote Transmitter Operation

The windows can be opened with the remote transmitter. By pressing the UNLOCK button twice and then holding it, all four windows and the moonroof will open. The windows and moonroof cannot be closed with the remote transmitter.

Key Operation

The windows can be opened and closed with the ignition key, (without Keyless Access) or the built-in key (Keyless Access). By inserting the key into the driver's door key cylinder switch and turning the key clockwise twice and then holding it, all four windows and the moonroof will open. By inserting the key into the driver's door key cylinder switch and turning the key counterclockwise twice and then holding it, all four windows and the moonroof will close.

Refer to the POWER WINDOW SYSTEM for specific tests and troubleshooting procedures.

Moonroof

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Moonroof Circuit Diagram - Keyless Access (Page 122). Scheme 369

Moonroof Circuit Diagram - Keyless Access (Page 122-1). Scheme 370

Moonroof Circuit Diagram - Keyless Access (Page 122-2). Scheme 371

How the Circuit Works (Keyless Access)

The moonroof is controlled by the moonroof control unit, the moonroof switch, the power window master switch, Driver's MICU, Passenger's MICU, and the Keyless Access Control Unit. The moonroof control unit contains the moonroof close relay, moonroof open relay, moonroof motor, the hall sensor, and the CPU.

Normal Operation

Battery voltage is supplied at all times through fuse 20 (Driver's Under-dash) to the contacts of the moonroof open and close relays. With the Engine Start/Stop Switch in ON mode or START mode, battery voltage is supplied through fuse 12 (Driver's Under-dash) to the Driver's MICU. The CPU uses input from the moonroof switch to provide ground for the relays. When one of the relays is energized, battery voltage is provided to the moonroof motor. In this condition, the other relay provides a path to ground for the moonroof motor.

The moonroof has a key-off delay, which allows the moonroof to be operated for up to 10 minutes after the Engine Start/Stop Switch is placed in OFF mode. Opening one of the front doors cancels the key-off delay.

The moonroof can be opened with the remote transmitter. By pressing the UNLOCK button twice and then holding it, the moonroof and all four windows will open. The moonroof and windows cannot be closed with the remote transmitter.

Built-in Key Operation

The moonroof can be opened and closed with the Built-in Key. By inserting the key into the driver's door key cylinder switch and turning the key clockwise twice and then holding it, the moonroof and all four windows will open. By inserting the key into the driver's door key cylinder switch and turning the key counterclockwise twice and then holding it, the moonroof and all four windows will close.

Refer to the MOONROOF for specific tests and troubleshooting procedures.

Moonroof Circuit Diagram - Without Keyless Access (Page 122-4). Scheme 372

Moonroof Circuit Diagram - Without Keyless Access (Page 122-5). Scheme 373

Moonroof Circuit Diagram - Without Keyless Access (Page 122-6). Scheme 374

How the Circuit Works (without Keyless Access)

The moonroof is controlled by the moonroof control unit, the moonroof switch, the power window master switch, Driver's MICU, Passenger's MICU, and the Immobilizer-Keyless Control Unit. The moonroof control unit contains the moonroof close relay, moonroof open relay, moonroof motor, the hall sensor, and the CPU.

Battery voltage is supplied at all times through fuse 20 (Driver's Under-dash) to the contacts of the moonroof open and close relays. With the ignition switch in ON (II) or START (III), battery voltage is supplied through fuse 12 (Driver's Under-dash) to the Driver's MICU. The CPU uses input from the moonroof switch to provide ground for the relays. When one of the relays is energized, battery voltage is provided to the moonroof motor. In this condition, the other relay provides a path to ground for the moonroof motor.

The moonroof has a key-off delay, which allows the moonroof to be operated for up to 10 minutes after the ignition is turned off. Opening one of the front doors cancels the key-off delay.

The moonroof can be opened with the remote transmitter. By pressing the UNLOCK button twice and then holding it, the moonroof and all four windows will open. The moonroof and windows cannot be closed with the remote transmitter.

Ignition Key Operation

The moonroof can be opened and closed with the ignition key. By inserting the key into the driver's door key cylinder switch and turning the key clockwise twice and then holding it, the moonroof and all four windows will open. By inserting the key into the driver's door key cylinder switch and turning the key counterclockwise twice and then holding it, the moonroof and all four windows will close.

Refer to the MOONROOF for specific tests and troubleshooting procedures.

Keyless/Power Door Locks/Security System

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Keyless/Power Door Locks/Security System Circuit Diagram (Page 130). Scheme 375

Keyless/Power Door Locks/Security System Circuit Diagram (Page 130-1). Scheme 376

Keyless/Power Door Locks/Security System Circuit Diagram (Page 130-2). Scheme 377

Keyless/Power Door Locks/Security System Circuit Diagram (Page 130-3). Scheme 378

Keyless/Power Door Locks/Security System Circuit Diagram (Page 130-4). Scheme 379

Keyless/Power Door Locks/Security System Circuit Diagram (Page 130-5). Scheme 380

The power door locks, keyless entry, and security system are part of the multiplex integrated control system. The use of multiplexing incorporates all three systems together. The following multiplex control units operate the three systems

1. Driver's MICU
2. Front Passenger's Power Window Switch
3. Gauge Control Module
4. Immobilizer-Keyless Control Unit
5. Passenger's MICU
6. Power Window Master Switch

Battery voltage is supplied at all times to the Driver's MICU, the Passenger's MICU, and the Power Window Master Switch through fuse 15 (Under-hood). Battery voltage is also supplied at all times to the Power Window Master Switch through fuse 24 (Driver's Under-dash) and to the Front Passenger's Power Window Switch through fuse 13 (Passenger's Under-dash). With the ignition switch in ON (II) or START (III), battery voltage is supplied to the Driver's MICU and the Passenger's MICU through fuse 12 (Driver's Under-dash). With the ignition switch in ON (II), battery voltage is supplied to the Power Window Master Switch through fuse 16 (Driver's Under-dash).

Door Locks (Switch Operation)

All lock and unlock commands from the Driver's and Front Passenger's Door Lock Switches are communicated across multiplex communication lines to the Driver's MICU and Passenger's MICU. The following lock or unlock signals are also communicated to the Driver's MICU and Passenger's MICU

1. Door Lock Knob Switches
2. Driver's Key Cylinder Switch
3. Trunk Lid Opener

According to the switch request, the Driver's MICU and Passenger's MICU control a series of relays which provide power and ground to the reversible electric door lock motors for lock and unlock modes.

Inserting the key into the Driver's Door Key Cylinder Switch and turning the key one time will command the Driver's MICU to unlock the driver's door. Turning the key a second time will command the Driver's MICU and Passenger's MICU to unlock the remaining doors.

Door Locks (Keyless Transmitter Operation)

The door can be locked and unlocked with the Keyless Transmitter. All lock and unlock commands are received by the Immobilizer-Keyless Control Unit. The Immobilizer-Keyless Control Unit communicates the lock and unlock commands to the Driver's MICU and Passenger's MICU via B-CAN.

According to the switch request, the Driver's MICU and Passenger's MICU control a series of relays that provide power and ground to the reversible electric door lock motors for lock and unlock modes.

Pressing the UNLOCK button one time will command the Driver's MICU to unlock the driver's door. Pressing the unlock button a second time will command the Driver's MICU and Passenger's MICU to unlock the remaining doors.

Pressing the LOCK button will command the Driver's MICU and Passenger's MICU to lock all of the doors.

Panic Mode

Pressing and holding the PANIC button on the Keyless Transmitter for 2 seconds will activate the panic mode feature. The panic mode command is received by the Immobilizer-Keyless Control Unit. The Immobilizer-Keyless Control Unit communicates the panic mode command to the Driver's MICU and Passenger's MICU via B-CAN.

According to the request, the Driver's MICU and Passenger's MICU sound the horns and flash the exterior lights for approximately 20 seconds. The panic mode can be cancelled by pressing any button on the Keyless Transmitter or by turning the ignition switch to the ON (II) position. If the ignition switch is in the ON (II) position, the panic mode cannot be activated.

Security System

The security system will arm automatically when the trunk and hood are closed, the key is removed from the ignition switch, and all of the doors are closed and locked.

The security system monitors the following signals

1. B-CAN Communication Lines
2. Door Lock Knob Switches
3. Door Switches
4. Ignition Key Switch
5. Security Hood Switch
6. Trunk Lid Latch Switch

When the security system is activated, the Driver's MICU and Passenger's MICU sound the horns and flash the exterior lights for approximately 2 minutes. The security system can be deactivated by unlocking the driver's door with the Driver's Door Key Cylinder Switch or by pressing the UNLOCK button on the Keyless Transmitter.

Refer to the KEYLESS/POWER DOOR LOCKS/SECURITY SYSTEM for specific tests and troubleshooting procedures.

The power door locks, keyless entry, and security system are part of the multiplex integrated control system. The use of multiplexing incorporates all three systems together. The following multiplex control units operate the three systems

1. Driver's MICU
2. Front Passenger's Power Window Switch
3. Gauge Control Module
4. Keyless Access Control Unit
5. Passenger's MICU
6. Power Window Master Switch

Battery voltage is supplied at all times to the Driver's MICU, the Passenger's MICU, and the Power Window Master Switch through fuse 15 (Under-hood). Battery voltage is also supplied at all times to the Power Window Master Switch through fuse 24 (Driver's Under-dash) and to the Front Passenger's Power Window Switch through fuse 13 (Passenger's Under-dash). With the Engine Start/Stop Switch in ON mode or START mode, battery voltage is supplied to the Driver's MICU and the Passenger's MICU through fuse 12 (Driver's Under-dash). With the Engine Start/Stop Switch in ON mode, battery voltage is supplied to the Power Window Master Switch through fuse 16 (Driver's Under-dash).

All lock and unlock commands from the Driver's and Front Passenger's Door Lock Switches are communicated across multiplex communication lines to the Driver's MICU and Passenger's MICU. The following lock or unlock signals are also communicated to the Driver's MICU and Passenger's MICU

1. Door Lock Knob Switches
2. Driver's Key Cylinder Switch
3. Trunk Lid Opener

According to the switch request, the Driver's MICU and Passenger's MICU control a series of relays which provide power and ground to the reversible electric door lock motors for lock and unlock modes.

Inserting the key into the Driver's Door Key Cylinder Switch and turning the key one time will command the Driver's MICU to unlock the driver's door. Turning the key a second time will command the Driver's MICU and Passenger's MICU to unlock the remaining doors.

Door Locks (Keyless Remote Operation)

The door can be locked and unlocked with the Keyless Remote. All lock and unlock commands are received by the Keyless Access Control Unit. The Keyless Access Control Unit communicates the lock and unlock commands to the Driver's MICU and Passenger's MICU via B-CAN.

According to the switch request, the Driver's MICU and Passenger's MICU control a series of relays that provide power and ground to the reversible electric door lock motors for lock and unlock modes.

Pressing the UNLOCK button one time will command the Driver's MICU to unlock the driver's door. Pressing the unlock button a second time will command the Driver's MICU and Passenger's MICU to unlock the remaining doors.

Pressing the LOCK button will command the Driver's MICU and Passenger's MICU to lock all of the doors.

Pressing and holding the PANIC button on the Keyless Remote for 2 seconds will activate the panic mode feature. The panic mode command is received by the Keyless Access Control Unit. The Keyless Access Control Unit communicates the panic mode command to the Driver's MICU and Passenger's MICU via B-CAN.

According to the request, the Driver's MICU and Passenger's MICU sound the horns and flash the exterior lights for approximately 20 seconds. The panic mode can be cancelled by pressing any button on the Keyless Remote or by turning the Engine Start/Stop Switch to ON mode. If the Engine Start/Stop Switch is in ON mode, the panic mode cannot be activated.

The security system will arm automatically when the trunk and hood are closed, the Remote is removed from the Remote Slot, and all of the doors are closed and locked.

The security system monitors the following signals

1. B-CAN Communication Lines
2. Door Lock Knob Switches
3. Door Switches
4. Remote Slot
5. Security Hood Switch
6. Trunk Lid Latch Switch

When the security system is activated, the Driver's MICU and Passenger's MICU sound the horns and flash the exterior lights for approximately 2 minutes. The security system can be deactivated by unlocking the driver's door with the Driver's Door Key Cylinder Switch or by pressing the UNLOCK button on the Keyless Remote.

Refer to the KEYLESS/POWER DOOR LOCKS/SECURITY SYSTEM for specific tests and troubleshooting procedures.

Keyless Access System

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Keyless Access System Circuit Diagram (Page 131). Scheme 381

Keyless Access System Circuit Diagram (Page 131-1). Scheme 382

Keyless Access System Circuit Diagram (Page 131-2). Scheme 383

Keyless Access System Circuit Diagram (Page 131-3). Scheme 384

Keyless Access System Circuit Diagram (Page 131-4). Scheme 385

Keyless Access System Circuit Diagram (Page 131-5). Scheme 386

Keyless Access System Circuit Diagram (Page 131-6). Scheme 387

Keyless Access System Circuit Diagram (Page 131-7). Scheme 388

Keyless Access System Circuit Diagram (Page 131-8). Scheme 389

Keyless Access System Circuit Diagram (Page 131-9). Scheme 390

Keyless Access System Circuit Diagram (Page 131-10). Scheme 391

Immobilizer System

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Immobilizer System Circuit Diagram - Without Keyless Access (Page 132). Scheme 392

Immobilizer System Circuit Diagram - Without Keyless Access (Page 132-1). Scheme 393

Immobilizer System Circuit Diagram - Without Keyless Access (Page 132-2). Scheme 394

Immobilizer System Circuit Diagram - Without Keyless Access (Page 132-3). Scheme 395

Trunk Lid Opener

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Trunk Lid Opener Circuit Diagram (Page 134). Scheme 396

Trunk Lid Opener Circuit Diagram (Page 134-1). Scheme 397

Trunk Lid Opener Circuit Diagram (Page 134-2). Scheme 398

Trunk Lid Opener Circuit Diagram (Page 134-3). Scheme 399

Fuel Fill Door Opener

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Fuel Fill Door Opener Circuit Diagram (Page 135). Scheme 400

Fuel Fill Door Opener Circuit Diagram (Page 135-1). Scheme 401

Interlock System

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Interlock System Circuit Diagram - A/T: Without Keyless Access (Page 138). Scheme 402

Interlock System Circuit Diagram - A/T: Without Keyless Access (Page 138-1). Scheme 403

Interlock System Circuit Diagram - A/T: Without Keyless Access (Page 138-2). Scheme 404

Interlock System Circuit Diagram - A/T: Without Keyless Access (Page 138-3). Scheme 405

Power Seats

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Power Seat Circuit Diagram - Front Passenger's Power Seat (Page 140). Scheme 406

Power Seat Circuit Diagram - Front Passenger's Power Seat (Page 140-1). Scheme 407

Power Seat Circuit Diagram - Driver's Power Lumbar Support (Page 140-2). Scheme 408

Battery voltage is provided at all times through fuses 8 and 9 (Passenger's Under-dash) to the front passenger's power seat adjustment switch.

Front Up-Down

When the front up-down switch is moved to DOWN, battery voltage is supplied to the front up-down motor through the front passenger's power seat adjustment switch. The front up-down motor is grounded through the UP contact of the front up-down switch. The motor will run until the switch is released or the seat reaches the full front down position. The contacts for UP operation of the front up-down switch are wired the opposite way of the DOWN contacts, causing the motor to run in the opposite direction.

Slide

Slide operation is similar to the front up-down operation.

Rear Up-Down

Rear up-down operation is similar to the front up-down operation.

Recline

Recline operation is similar to the front up-down operation.

Refer to the POWER SEAT SYSTEM for specific tests and troubleshooting procedures.

Battery voltage is supplied at all times through fuse 18 (Passenger's Under-dash) to the driver's power lumbar support switch.

Raise Lumbar Support

When the lumbar support switch is moved to FORWARD, battery voltage is supplied to the lumbar support motor through the lumbar support switch. The lumbar support motor is grounded through the opposite contact of the lumbar support switch. The motor will run until the switch is released or the lumbar support reaches the full forward position.

Lower Lumbar Support

When the lumbar support switch is moved to BACKWARD, battery voltage is supplied to the lumbar support motor through the lumbar support switch. The lumbar support motor is grounded through the opposite contact of the lumbar support switch. The motor will run until the switch is released or the lumbar support reaches the full backward position.

Refer to the POWER SEAT SYSTEM for specific tests and troubleshooting procedures.

Automatic Dimming Inside Mirror

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Automatic Dimming Inside Mirror Circuit Diagram - A/T (Page 142). Scheme 409

Automatic Dimming Inside Mirror Circuit Diagram - M/T (Page 142-1). Scheme 410

DPMS

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

DPMS Circuit Diagram (Page 143). Scheme 411

DPMS Circuit Diagram (Page 143-1). Scheme 412

DPMS Circuit Diagram (Page 143-2). Scheme 413

DPMS Circuit Diagram (Page 143-3). Scheme 414

DPMS Circuit Diagram (Page 143-4). Scheme 415

DPMS Circuit Diagram (Page 143-5). Scheme 416

DPMS Circuit Diagram (Page 143-6). Scheme 417

DPMS Circuit Diagram (Page 143-7). Scheme 418

In the driving position memory system, the driver's seat and the power mirrors have a memory feature. The four driver's seat adjustments (forward and back, front up and down, rear up and down, and seat back angle) and the power mirror adjustments can be regulated separately. All of the adjustments can be memorized at the same time by pressing the SET button of the driving position memory switch, and then (within five seconds) pressing one of the two position buttons. If the same position button is pressed after the adjustments are stored, the seat and the mirrors will move to the memorized positions.

Note. Disconnecting the battery will cancel the memorized positions.

The driving position memory system is connected directly to the remote transmitters 1 and 2. When the doors are unlocked using either the remote transmitter 1 or remote transmitter 2, the corresponding memory position 1 or 2 is activated.

Power Seat Position Sensors

Each driver's power seat motor has a corresponding sensor, which sends a pulse to the power seat control unit when the motor rotates. The power seat control unit then stores the number of pulses for that seat position in its memory.

Power Mirror Position Sensors

Each power mirror has a tilt position sensor and a swing position sensor to detect the changes in voltage caused by the movements of the mirror. The power mirror control unit then stores the voltage changes for that mirror's position in its memory.

Reverse Mirror Control

When the transmission is shifted into reverse with the mirror selection switch in LEFT or RIGHT, the corresponding mirror tilts down automatically. If the mirror selection switch is in the neutral position, the reverse mirror control is disabled. When the transmission is shifted out of reverse, the tilted mirror will return to its previous position.

Refer to the DRIVER POSITION MEMORY SYSTEM (DPMS) for specific tests and troubleshooting procedures.

Seat Heaters

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Seat Heaters Circuit Diagram (Page 147). Scheme 419

Seat Heaters Circuit Diagram (Page 147-1). Scheme 420

With the ignition switch in ON (II), (without Keyless Access) or the Engine Start/Stop Switch in ON mode (Keyless Access), battery voltage is provided through fuse 16 (in the driver's under-dash fuse/relay box) to the seat heater switches. With the seat heater switches ON, battery voltage is provided to the coil of the seat heater relay, which is grounded at G701 and G702. The coil of the relay is then energized, which closes the relay contacts providing voltage through fuse 19 (in the passenger's under-dash fuse/relay box) and the relay to both seat heater switches.

Two heaters are provided in the driver's seat. One is located in the seat cushion, and the other is in the seat back. The passenger's seat heater is located in the seat cushion only.

When the driver's seat heater switch is in the LOW position, current flows in series through the seat heater switch, the RED wire, the driver's seat heater relay (low) to the seat cushion and seat back heaters to ground G701. Current is limited because it is flowing through both seat heaters in series, making the seat warm enough for moderately cold weather.

When the driver's seat heater switch is in the HIGH position, current flows in parallel through the seat heater switch, the WHT wire, the driver's seat heater relay (high) the circuit breaker and thermostat, and through the seat cushion and seat back heaters. The seat cushion heater is grounded through the BLK wire and the driver's seat heater switch to G405. The seat back heater is grounded at G701. Since the seat cushion and seat back heaters are now in parallel, current flow through them increases, and the seat warms to its maximum temperature. The circuit breaker is closed below 113T (45°C) and opens above 140T (60°C), while the thermostat is closed below 110T (43°C) and opens above 117T (53°C). This helps maintain a constant seat temperature and prevent overheating. The front passenger's seat cushion heater works the same way.

Refer to the SEAT HEATERS for specific tests or troubleshooting procedures.

Audio System

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Audio System Circuit Diagram - Without Navigation (Page 150). Scheme 421

Audio System Circuit Diagram - Without Navigation (Page 150-1). Scheme 422

Audio System Circuit Diagram - Without Navigation (Page 150-2). Scheme 423

Audio System Circuit Diagram - Without Navigation (Page 150-3). Scheme 424

Audio System Circuit Diagram - Without Navigation (Page 150-4). Scheme 425

Audio System Circuit Diagram - Without Navigation (Page 150-5). Scheme 426

Audio System Circuit Diagram - Without Navigation (Page 150-6). Scheme 427

Audio System Circuit Diagram - Without Navigation (Page 150-7). Scheme 428

Audio System Circuit Diagram - Without Navigation (Page 150-8). Scheme 429

Audio System Circuit Diagram - Without Navigation (Page 150-9). Scheme 430

Audio System Circuit Diagram - Without Navigation (Page 150-10). Scheme 431

Audio System Circuit Diagram - Without Navigation (Page 150-11). Scheme 432

Audio System Circuit Diagram - Without Navigation (Page 150-12). Scheme 433

Audio System Circuit Diagram - Without Navigation (Page 150-13). Scheme 434

Audio System Circuit Diagram - Without Navigation (Page 150-14). Scheme 435

Audio System Circuit Diagram - Without Navigation (Page 150-15). Scheme 436

Audio System Circuit Diagram - Navigation (Page 150-16). Scheme 437

Audio System Circuit Diagram - Navigation (Page 150-17). Scheme 438

Audio System Circuit Diagram - Navigation (Page 150-18). Scheme 439

Audio System Circuit Diagram - Navigation (Page 150-19). Scheme 440

Audio System Circuit Diagram - Navigation (Page 150-20). Scheme 441

Audio System Circuit Diagram - Navigation (Page 150-21). Scheme 442

Audio System Circuit Diagram - Navigation (Page 150-22). Scheme 443

Audio System Circuit Diagram - Navigation (Page 150-23). Scheme 444

Audio System Circuit Diagram - Navigation (Page 150-24). Scheme 445

Audio System Circuit Diagram - Navigation (Page 150-25). Scheme 446

Audio System Circuit Diagram - Navigation (Page 150-26). Scheme 447

Audio System Circuit Diagram - Navigation (Page 150-27). Scheme 448

Audio System Circuit Diagram - Navigation (Page 150-28). Scheme 449

Audio System Circuit Diagram - Navigation (Page 150-29). Scheme 450

Audio System Circuit Diagram - Navigation (Page 150-30). Scheme 451

Audio System Circuit Diagram - Navigation (Page 150-31). Scheme 452

Audio System Circuit Diagram - Navigation (Page 150-32). Scheme 453

HFL System (HandsFreeLink)

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

HFL System (HandsFreeLink) Circuit Diagram (Page 152). Scheme 454

HFL System (HandsFreeLink) Circuit Diagram (Page 152-1). Scheme 455

HFL System (HandsFreeLink) Circuit Diagram (Page 152-2). Scheme 456

HFL System (HandsFreeLink) Circuit Diagram (Page 152-3). Scheme 457

HFL System (HandsFreeLink) Circuit Diagram (Page 152-4). Scheme 458

HFL System (HandsFreeLink) Circuit Diagram (Page 152-5). Scheme 459

HFL System (HandsFreeLink) Circuit Diagram (Page 152-6). Scheme 460

HFL System (HandsFreeLink) Circuit Diagram (Page 152-7). Scheme 461

HFL System (HandsFreeLink) Circuit Diagram (Page 152-8). Scheme 462

HFL System (HandsFreeLink) Circuit Diagram (Page 152-9). Scheme 463

HFL System (HandsFreeLink) Circuit Diagram (Page 152-10). Scheme 464

HFL System (HandsFreeLink) Circuit Diagram (Page 152-11). Scheme 465

HFL System (HandsFreeLink) Circuit Diagram (Page 152-12). Scheme 466

HFL System (HandsFreeLink) Circuit Diagram (Page 152-13). Scheme 467

HFL System (HandsFreeLink) Circuit Diagram (Page 152-14). Scheme 468

HFL System (HandsFreeLink) Circuit Diagram (Page 152-15). Scheme 469

HFL System (HandsFreeLink) Circuit Diagram (Page 152-16). Scheme 470

HFL System (HandsFreeLink) Circuit Diagram (Page 152-17). Scheme 471

HFL System (HandsFreeLink) Circuit Diagram (Page 152-18). Scheme 472

HFL System (HandsFreeLink) Circuit Diagram (Page 152-19). Scheme 473

AcuraLink

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

AcuraLink Circuit Diagram (Page 153). Scheme 474

AcuraLink Circuit Diagram (Page 153-1). Scheme 475

AcuraLink Circuit Diagram (Page 153-2). Scheme 476

AcuraLink Circuit Diagram (Page 153-3). Scheme 477

AcuraLink Circuit Diagram (Page 153-4). Scheme 478

AcuraLink Circuit Diagram (Page 153-5). Scheme 479

AcuraLink Circuit Diagram (Page 153-6). Scheme 480

AcuraLink Circuit Diagram (Page 153-7). Scheme 481

AcuraLink Circuit Diagram (Page 153-8). Scheme 482

AcuraLink Circuit Diagram (Page 153-9). Scheme 483

AcuraLink Circuit Diagram (Page 153-10). Scheme 484

Electrical Compass

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Electrical Compass Circuit Diagram (Page 154). Scheme 485

Accessory Power Sockets

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Accessory Power Sockets Circuit Diagram - Without Keyless Access (Page 155). Scheme 486

Accessory Power Sockets Circuit Diagram - Keyless Access (Without Headlight Washer) (Page 155-1). Scheme 487

Accessory Power Sockets Circuit Diagram - Canada: Keyless Access (Page 155-2). Scheme 488

Cigarette Lighter

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Cigarette Lighter Circuit Diagram - Mexico (Page 155-3). Scheme 489

Navigation System

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Navigation System Circuit Diagram (Page 156). Scheme 490

Navigation System Circuit Diagram (Page 156-1). Scheme 491

Navigation System Circuit Diagram (Page 156-2). Scheme 492

Navigation System Circuit Diagram (Page 156-3). Scheme 493

Navigation System Circuit Diagram (Page 156-4). Scheme 494

Navigation System Circuit Diagram (Page 156-5). Scheme 495

Navigation System Circuit Diagram (Page 156-6). Scheme 496

Navigation System Circuit Diagram (Page 156-7). Scheme 497

Navigation System Circuit Diagram (Page 156-8). Scheme 498

Navigation System Circuit Diagram (Page 156-9). Scheme 499

Navigation System Circuit Diagram (Page 156-10). Scheme 500

Navigation System Circuit Diagram (Page 156-11). Scheme 501

Navigation System Circuit Diagram (Page 156-12). Scheme 502

Battery voltage is supplied at all times through fuse 15 (Under-hood) to the audio-navigation unit and the navigation display unit.

Battery voltage is supplied with the ignition switch in the ACC (I) or ON (II) position (without Keyless Access) or the engine start/stop switch in ACC or ON mode (Keyless Access) through fuse 18 (Driver's Under-dash) to the audio-navigation unit, navigation display unit and the interface dial.

The audio-navigation unit, navigation display unit, and the interface dial are the main components of the audio system. The navigation display unit does not have a touch panel. Instead, an interface dial and audio switch panel allows control of the navigation system. The audio-navigation unit, and navigation display unit communicate with each other through the GA-Net II communication bus. The audio-navigation unit generates the screen graphics, and then passes them to the navigation display unit as Red, Green, and Blue (RGB) color signals, and a composite sync signal.

Voice Control System (Talk/Back buttons)

The voice control system is the primary method for the driver to communicate with the navigation system. The system consists of a Talk and Back button located on the left steering wheel spoke. The audio speakers are used to verbally confirm commands, and to prompt the driver for additional inputs. The HandsFreelink (HFL) has its own Talk and Back switches (also on the steering wheel) that operate in a manner similar to the navigation switches.

Navigation Display Unit (Upper display)

The audio-navigation unit and climate control unit control the audio, climate, and time data displayed on this device. The time is updated by the audio-navigation unit, and can be adjusted in the navigation "setup" menu.

Navigation Function

The navigation system utilizes the GPS signals obtained by the GPS antenna, the vehicle speed signal from the ECM/PCM, and the yaw rate sensor contained in the audio-navigation unit to get a user from a starting position to a desired destination. The GPS signals, the vehicle speed signal and the yaw rate sensor (in the navigation control unit) determine the position of the vehicle icon on the map. The navigation system relies on the DVD ROM for maps and points of interest (POI) in order to provide the user with the optimum route between starting and destination positions.

Route Guidance

When traveling to a destination, the navigation system provides turn-by-turn map and voice guidance. The audio system outputs the navigation voice guidance prompts to the front speakers.

GPS Signal Reception

The GPS signals obtained by the GPS antenna are provided by up to 24 different satellites. The audio-navigation unit supplies the GPS antenna with 5V through a coax cable to power the antenna's amplifier. The GPS receiver in the audio-navigation unit receives the amplified GPS signals back through the same coax cable. The GPS receiver identifies the satellites and processes the different GPS signals. These signals are then converted to actual locations by the audio-navigation unit in order to determine the position of the vehicle.

Other Navigation Inputs

The audio-navigation unit uses the vehicle speed signal from the ECM/PCM, a yaw rate sensor (in the audio-navigation unit), and the reverse signal to display the vehicle's direction and speed of travel on the map. The illumination signal (headlights ON) is used by the audio-navigation unit to automatically switch the display between night and day brightness modes when the display is set to Auto. When the instrument panel brightness control is set to full brightness (hold both the + and - keys at the same time), the navigation system stays in the day mode, even with the headlights ON.

GA-NET

The GA-Net bus is basically an audio bus. The GA-Net bus connects the AcuraLink control unit (XM receiver), navigation display unit, audio-navigation unit, XM receiver, and USB adapter unit. Data passed on this bus include manual audio control functions, like XM station selection, audio voice commands from the driver, and the muting signal from the audio-navigation unit.

COMM - BUS (HFL)

The navigation system is fully integrated with the HandsFreeLink (HFL). This high-speed bus communicates with the audio-navigation unit and HandsFreeLink control unit. The HFL utilizes the bus to transmit whether a Bluetooth cell phone is currently paired or a navigation POI phone number to be dialed by the HFL.

F-CAN Communications

Fast Controller Area Network (F-CAN) multiplex network information is transmitted across the communication lines for "real time" functions such as vehicle speed, fuel, emissions, and traction control data.

Refer to the MULTIPLEX INTEGRATED CONTROL SYSTEM for specific tests and troubleshooting procedures.

B-CAN Communications

B-CAN passes low speed vehicle functions between components. Typically these include door lock/unlock commands that can be activated remotely. See MULTIPLEX INTEGRATED CONTROL SYSTEM for troubleshooting information.

Climate Bus

The climate bus connects the audio-navigation unit with the climate control unit. Data on this line consists of manual selections of mode, or fan speed, and voice control commands issued by the driver.

Muting

The audio-navigation unit orchestrates all muting logic. All voice commands are broadcast over the front audio speakers. The HFL system has the highest priority followed by Navigation voice and then the audio unit CD/DVD or AM-FM-XM music channels.

Navigation System Diagram (Page 156-15). Scheme 503

Navigation System Diagram (Page 156-16). Scheme 504

HomeLink® Remote Control System

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

HomeLink Remote Control System Circuit Diagram (Page 157). Scheme 505

Rearview Camera

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Rearview Camera Circuit Diagram (Page 161). Scheme 506

Rearview Camera Circuit Diagram (Page 161-1). Scheme 507

Back-up Sensor System

Note. For connector or component location "PHOTO", see OEM COMPONENT LOCATION . For connector "VIEW", see OEM CONNECTOR END VIEWS .

Back-up Sensor System Circuit Diagram - Acura Accessory (Page 162). Scheme 508

See also:
• OEM COMPONENT LOCATION
• OEM CONNECTOR END VIEWS
• CRUISE CONTROL SYSTEMS
• MULTIPLEX INTEGRATED CONTROL SYSTEM
• FAN CONTROLS
• REAR WINDOW DEFOGGER
• A/T INTERLOCK SYSTEM
• WIPER SYSTEM & WASHER SYSTEM
• EXTERIOR LIGHTS
• POWER WINDOW SYSTEM
• MOONROOF
• KEYLESS/POWER DOOR LOCKS/SECURITY SYSTEM
• POWER SEAT SYSTEM
• DRIVER POSITION MEMORY SYSTEM (DPMS)
• SEAT HEATERS
• Multiplex Integrated Control System