Oem Circuit Diagrams Acura TSX II

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 (Page 10). Scheme 75

Power Distribution Circuit Diagram (Page 10-1). Scheme 76

Power Distribution Circuit Diagram (Page 10-2). Scheme 77

Power Distribution Circuit Diagram (Page 10-3). Scheme 78

Power Distribution Circuit Diagram (Page 10-4). Scheme 79

Power Distribution Circuit Diagram (Page 10-5). Scheme 80

Power Distribution Circuit Diagram (Page 10-6). Scheme 81

Power Distribution Circuit Diagram (Page 10-7). Scheme 82

Power Distribution Circuit Diagram (Page 10-8). Scheme 83

Power Distribution Circuit Diagram (Page 10-9). Scheme 84

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

Power Distribution Circuit Diagram (Page 10-11). Scheme 86

Power Distribution Circuit Diagram (Page 10-12). Scheme 87

Power Distribution Circuit Diagram (Page 10-13). Scheme 88

Power Distribution Circuit Diagram (Page 10-14). Scheme 89

Power Distribution Circuit Diagram (Page 10-15). Scheme 90

Power Distribution Circuit Diagram (Page 10-16). Scheme 91

Power Distribution Circuit Diagram (Page 10-17). Scheme 92

Power Distribution Circuit Diagram (Page 10-18). Scheme 93

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 And G3 (Page 14). Scheme 94

Ground Distribution Circuit Diagram - G101 (Page 14-1). Scheme 95

Ground Distribution Circuit Diagram - G101 (Page 14-2). Scheme 96

Ground Distribution Circuit Diagram - G201 (Page 14-3). Scheme 97

Ground Distribution Circuit Diagram - G202 (Page 14-3). Scheme 98

Ground Distribution Circuit Diagram - G203 (Page 14-4). Scheme 99

Ground Distribution Circuit Diagram - G301 (Page 14-4). Scheme 100

Ground Distribution Circuit Diagram - G302 (Page 14-5). Scheme 101

Ground Distribution Circuit Diagram - G401 (Partial) (Page 14-6). Scheme 102

Ground Distribution Circuit Diagram - G401 (Partial) (Page 14-6). Scheme 103

Ground Distribution Circuit Diagram - G501 (Page 14-7). Scheme 104

Ground Distribution Circuit Diagram - G501 (Page 14-8). Scheme 105

Ground Distribution Circuit Diagram - G502 (Page 14-9). Scheme 106

Ground Distribution Circuit Diagram - G503 (Page 14-9). Scheme 107

Ground Distribution Circuit Diagram - G504 (Page 14-10). Scheme 108

Ground Distribution Circuit Diagram - G505 (Page 14-10). Scheme 109

Ground Distribution Circuit Diagram - G601 (Page 14-11). Scheme 110

Ground Distribution Circuit Diagram - G602 And G603 (Page 14-11). Scheme 111

Ground Distribution Circuit Diagram - G651 (Page 14-12). Scheme 112

Ground Distribution Circuit Diagram - G651 Partial (Page 14-12). Scheme 113

Ground Distribution Circuit Diagram - G701 (Page 14-13). Scheme 114

Ground Distribution Circuit Diagram - G702 (Page 14-13). Scheme 115

Ground Distribution Circuit Diagram - G801 (Page 14-14). Scheme 116

Ground Distribution Circuit Diagram - G901 (Page 14-14). Scheme 117

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 (Page 15). Scheme 118

A/T Reverse Position Circuit Diagram (Page 15). Scheme 119

Back-Up Lights Circuit Diagram (Page 15-1). Scheme 120

Brake Pedal Position Circuit Diagram (Page 15-1). Scheme 121

Engine Speed Pulse Circuit Diagram (Page 15-2). Scheme 122

Ground For PCM Sensors (SG1) Circuit Diagram (Page 15-2). Scheme 123

Ground For PCM Sensors (SG2) Circuit Diagram (Page 15-3). Scheme 124

Ground For PCM Sensors (SG6) Circuit Diagram (Page 15-3). Scheme 125

Ground For Climate Control Sensors Circuit Diagram (Page 15-4). Scheme 126

Illumination (Positive) Circuit Diagram (Page 15-5). Scheme 127

Illumination (Positive) Circuit Diagram (Page 15-6). Scheme 128

Illumination (Negative) Circuit Diagram - Bulbs (Page 15-7). Scheme 129

Illumination (Negative) Circuit Diagram - Bulbs (Page 15-8). Scheme 130

Illumination (Negative) Circuit Diagram - LEDs (Page 15-9). Scheme 131

Left Turn Signal Circuit Diagram (Page 15-10). Scheme 132

PCM Controlled Power Source Circuit Diagram - USA, Canada (Page 15-10). Scheme 133

PCM Controlled Power Source Circuit Diagram - Mexico (Page 15-11). Scheme 134

PCM Relays Control Circuit Diagram (Page 15-11). Scheme 135

Power Source For PCM Circuit Diagram (Page 15-12). Scheme 136

Reference Voltage For PCM Sensors (VCC1) Circuit Diagram (Page 15-12). Scheme 137

Reference Voltage For PCM Sensors (VCC1) Circuit Diagram (Page 15-13). Scheme 138

Reference Voltage For PCM Sensors (VCC2) Circuit Diagram (Page 15-13). Scheme 139

Right Turn Signal Circuit Diagram (Page 15-14). Scheme 140

Trunk Switch Position Circuit Diagram (Page 15-14). Scheme 141

Switch Illumination Circuit Diagram (Page 15-15). Scheme 142

Logic Ground Circuit Diagram (Page 15-15). Scheme 143

Interior Light Control Unit Circuit Diagram (Page 15-16). Scheme 144

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 145

Data Link Connector Circuit Diagram (Page 16-1). Scheme 146

Data Link Connector Circuit Diagram (Page 16-2). Scheme 147

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 148

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 - Factory (Page 21). Scheme 149

Starting System Circuit Diagram - Factory (Page 21-1). Scheme 150

Remote Starting System (Acura Accessory) Circuit Diagram (Page 21-2). Scheme 151

Remote Starting System (Acura Accessory) Circuit Diagram (Page 21-3). Scheme 152

Remote Starting System (Acura Accessory) Circuit Diagram (Page 21-4). Scheme 153

Remote Starting System (Acura Accessory) Circuit Diagram (Page 21-5). Scheme 154

Remote Starting System (Acura Accessory) Circuit Diagram (Page 21-6). Scheme 155

Remote Starting System (Acura Accessory) Circuit Diagram (Page 21-7). Scheme 156

How the Remote Starting System Circuit Works

The Remote Starting System is designed to start the engine remotely without using the ignition key. The ignition key must be utilized to drive the vehicle.

The transmitter can start the engine provided all of the following conditions are met

1. The gearshift lever is in the "P" (Park) position. (See «INTERLOCK SYSTEM»(/acura/tsx/ii-2008-2014/remont/body-electrical/#oem-circuit-diagrams__interlock-system) )
2. The brake pedal is not depressed. (See «INTERLOCK SYSTEM»(/acura/tsx/ii-2008-2014/remont/body-electrical/#oem-circuit-diagrams__interlock-system) )
3. The ignition key is not inserted into the ignition switch. (See «Keyless/Power Door Locks/Security System (V6)»(/acura/tsx/ii-2008-2014/remont/body-electrical/#oem-circuit-diagrams__keylesspower-door-lockssecurity-system-v6) )
4. The hood is securely closed. (See «Keyless/Power Door Locks/Security System (V6)»(/acura/tsx/ii-2008-2014/remont/body-electrical/#oem-circuit-diagrams__keylesspower-door-lockssecurity-system-v6) )
5. All of the doors are closed and locked. (See «Keyless/Power Door Locks/Security System (V6)»(/acura/tsx/ii-2008-2014/remont/body-electrical/#oem-circuit-diagrams__keylesspower-door-lockssecurity-system-v6) )
6. The trunk is closed. (See «Keyless/Power Door Locks/Security System (V6)»(/acura/tsx/ii-2008-2014/remont/body-electrical/#oem-circuit-diagrams__keylesspower-door-lockssecurity-system-v6) )
7. The security system has not been triggered. (See «Keyless/Power Door Locks/Security System (V6)»(/acura/tsx/ii-2008-2014/remont/body-electrical/#oem-circuit-diagrams__keylesspower-door-lockssecurity-system-v6) )
8. The panic warning system is not activated. (See «Keyless/Power Door Locks/Security System (V6)»(/acura/tsx/ii-2008-2014/remont/body-electrical/#oem-circuit-diagrams__keylesspower-door-lockssecurity-system-v6) )

The engine automatically stops when any of the following conditions is satisfied after starting the engine with the transmitter

1. A specified engine running time has expired.
2. The gearshift lever is in any position but "P" (Park). (See «INTERLOCK SYSTEM»(/acura/tsx/ii-2008-2014/remont/body-electrical/#oem-circuit-diagrams__interlock-system) )
3. The brake pedal is pressed. (See «INTERLOCK SYSTEM»(/acura/tsx/ii-2008-2014/remont/body-electrical/#oem-circuit-diagrams__interlock-system) )
4. The ignition key is inserted into the ignition switch. (See «Keyless/Power Door Locks/Security System (V6)»(/acura/tsx/ii-2008-2014/remont/body-electrical/#oem-circuit-diagrams__keylesspower-door-lockssecurity-system-v6) )
5. The hood is opened. (See «Keyless/Power Door Locks/Security System (V6)»(/acura/tsx/ii-2008-2014/remont/body-electrical/#oem-circuit-diagrams__keylesspower-door-lockssecurity-system-v6) )
6. Any of the doors is opened or unlocked. (See «Keyless/Power Door Locks/Security System (V6)»(/acura/tsx/ii-2008-2014/remont/body-electrical/#oem-circuit-diagrams__keylesspower-door-lockssecurity-system-v6) )
7. The trunk is opened. (See «Keyless/Power Door Locks/Security System (V6)»(/acura/tsx/ii-2008-2014/remont/body-electrical/#oem-circuit-diagrams__keylesspower-door-lockssecurity-system-v6) )
8. The security system has been triggered. (See «Keyless/Power Door Locks/Security System (V6)»(/acura/tsx/ii-2008-2014/remont/body-electrical/#oem-circuit-diagrams__keylesspower-door-lockssecurity-system-v6) )
9. The panic warning system is activated. (See «Keyless/Power Door Locks/Security System (V6)»(/acura/tsx/ii-2008-2014/remont/body-electrical/#oem-circuit-diagrams__keylesspower-door-lockssecurity-system-v6) )
10. The engine speed rises to 4, 000 rpm or more. (See «GAUGES AND INDICATORS»(/acura/tsx/ii-2008-2014/remont/body-electrical/#oem-circuit-diagrams__gauges-and-indicators) )
11. The engine malfunction indicator comes on. (See «GAUGES AND INDICATORS»(/acura/tsx/ii-2008-2014/remont/body-electrical/#oem-circuit-diagrams__gauges-and-indicators) )
12. The low oil pressure indicator comes on. (See «LOW OIL PRESSURE INDICATOR»(/acura/tsx/ii-2008-2014/remont/body-electrical/#oem-circuit-diagrams__reminder-systems-safety-indicator-key-light) )

Refer to the Remote Starting System User's Information manual for system function and safety guidelines.

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 157

Charging System Circuit Diagram (Page 22-1). Scheme 158

Fuel and Emissions

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

PCM Power And Grounds Circuit Diagram (Page 23). Scheme 159

MIL Circuit Diagram (Page 23). Scheme 160

PGM-FI System Circuit Diagram (Page 23-1). Scheme 161

PGM-FI System Circuit Diagram (Page 23-2). Scheme 162

PGM-FI System Circuit Diagram (Page 23-3). Scheme 163

Electronic Throttle Control System Circuit Diagram (Page 23-4). Scheme 164

Idle Control System Circuit Diagram (Page 23-5). Scheme 165

Fuel Supply System Circuit Diagram (Page 23-6). Scheme 166

EVAP System Circuit Diagram (Page 23-7). Scheme 167

EGR System Circuit Diagram (Page 23-8). Scheme 168

Intake Air System Circuit Diagram (Page 23-8). Scheme 169

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 170

VTEC System

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

VTEC System Circuit Diagram (Page 31). Scheme 171

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 172

Cruise Control Circuit Diagram (Page 34-1). Scheme 173

Cruise Control Circuit Diagram (Page 34-2). Scheme 174

Cruise Control Circuit Diagram (Page 34-3). Scheme 175

How the Circuit Works

The 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 12 (Under-hood) 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), battery voltage is supplied through Fuse 7 (Driver's Under-dash) to the brake pedal position switch and then to the PCM and through Fuse 5 (Driver's Under-dash) to the gauge control module. Also, the gauge control module receives all signals from the Cruise control combination switch via a single input.

System Description

When the main switch is pressed, the signal for the main switch is sent to the gauge control module, and the cruise control main switch indicator LED illuminates. With the shift lever in D or S, a path to ground is provided for the drive input to the PCM. The PCM detects that the shift lever is in D or S through this input, which enables the cruise control.

When the decel/set switch is pressed, the signal for set is sent to the gauge control module, and the cruise control indicator LED illuminates. The gauge control module communicates the set signal via multiplex communication lines to the PCM. Using the vehicle speed input obtained from the output shaft (countershaft) speed sensor, the 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, a battery voltage input is sent to the PCM through fuse 12 (Under-hood) and the battery voltage input through fuse 7 (Driver's Under-dash) is removed. The PCM communicates the brake pedal pressed information via multiplex communication lines to the gauge control module, which turns off the cruise control indicator LED. The information is also used by the PCM to remove the cruise control system's control of the throttle.

When the resume/accel switch is pressed, the signal for resume is sent to the gauge control module, and the cruise control indicator LED illuminates. The gauge control module communicates the resume signal via multiplex communication lines to the PCM. Using the vehicle speed input obtained from the output shaft (countershaft) speed sensor, the 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, the signal for cancel is sent to the gauge control module, which turns off the cruise control indicator LED. The gauge control module communicates the cancel signal via multiplex communication lines to the PCM, which removes the cruise control system's control of the throttle.

With the cruise control activated, pressing the decel/set switch decelerates the set speed in 1 mph increments, while pressing the resume/accel switch will accelerates the set speed in 1 mph increments. The gauge control module communicates these signals via multiplex communication lines to the PCM.

Refer to the CRUISE CONTROL (V6) 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 176

VSA Circuit Diagram (Page 36-1). Scheme 177

VSA Circuit Diagram (Page 36-2). Scheme 178

A/T Controls

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

A/T Controls Circuit Diagram (Page 39). Scheme 179

A/T Controls Circuit Diagram (Page 39-1). Scheme 180

A/T Controls Circuit Diagram (Page 39-2). Scheme 181

A/T Controls Circuit Diagram (Page 39-3). Scheme 182

Horns

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

Horns Circuit Diagram (Page 40). Scheme 183

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 184

EPS Circuit Diagram (Page 45-1). Scheme 185

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 186

SRS Circuit Diagram (Page 47-1). Scheme 187

SRS Circuit Diagram (Page 47-2). Scheme 188

SRS Circuit Diagram (Page 47-3). Scheme 189

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 190

Multiplex Integrated Control System Circuit Diagram - Power, Grounds, And Diagnostics (Page 50-1). Scheme 191

Multiplex Integrated Control System Circuit Diagram - B-CAN Communication Line (High) (Page 50-2). Scheme 192

Multiplex Integrated Control System Circuit Diagram - B-CAN Communication Line (Low) (Page 50-3). Scheme 193

Multiplex Integrated Control System Circuit Diagram - F-CAN Communication Line (High) (Page 50-4). Scheme 194

Multiplex Integrated Control System Circuit Diagram - F-CAN Communication Line (Low) (Page 50-5). Scheme 195

Multiplex Integrated Control System Circuit Diagram - K-Line Communication Line (Page 50-6). Scheme 196

Multiplex Integrated Control System Circuit Diagram - UART Communication Line (Page 50-7). Scheme 197

Multiplex Integrated Control System Circuit Diagram - GA-NET Bus (Without XM Radio) (Page 50-8). Scheme 198

Multiplex Integrated Control System Circuit Diagram - GA-NET Bus (XM Radio Without Navigation) (Page 50-9). Scheme 199

Multiplex Integrated Control System Circuit Diagram - GA-NET Bus (Navigation With XM Radio) (Page 50-10). Scheme 200

Multiplex Integrated Control System Circuit Diagram - GA-NET Bus (Navigation With AcuraLink) (Page 50-11). Scheme 201

Multiplex Integrated Control System Circuit Diagram - GA-NET Audio (Without XM Radio) (Page 50-12). Scheme 202

Multiplex Integrated Control System Circuit Diagram - GA-NET Audio (XM Radio Without Navigation) (Page 50-13). Scheme 203

Multiplex Integrated Control System Circuit Diagram - GA-NET Audio (XM Radio With Navigation) (Page 50-14). Scheme 204

Multiplex Integrated Control System Circuit Diagram - GA-NET Audio (AcuraLink) (Page 50-15). Scheme 205

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. DPMS
2. Entry Light Control System
3. Exterior Lights
4. Gauges and Indicators
5. Horns
6. Immobilizer System
7. Interior Lights
8. Interlock System
9. Moonroof
10. Keyless/Power Door Locks/Security System (V6)
11. Power Windows
12. Reminder Systems
13. Safety Indicator
14. 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 (XM Receiver)
2. DLC
3. PCM
4. EPS Control Unit
5. Gauge Control Module
6. SRS Unit
7. TPMS Control Unit
8. VSA Modulator-Control Unit
9. Yaw Rate-Lateral Acceleration Sensor

Refer to the MULTIPLEX INTEGRATED CONTROL SYSTEM (V6) 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 206

HVAC Circuit Diagram (Page 60-1). Scheme 207

HVAC Circuit Diagram (Page 60-2). Scheme 208

HVAC Circuit Diagram (Page 60-3). Scheme 209

Fans

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

Fans Circuit Diagram (Page 63). Scheme 210

Fans Circuit Diagram (Page 63-1). Scheme 211

Battery voltage is supplied at all times through Multi-fuse 3 (in the under-hood fuse/relay box) to the contacts of the A/C Condenser Fan Relay and Radiator Fan Relay. With the ignition switch in ON (II), battery voltage is supplied through fuse 16 (in the driver's under-dash fuse/relay box) 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 (in the under-hood fuse/relay box) to the Radiator Fan Relay coil.

Extremely High Coolant Temperatures

In extremely high coolant temperature conditions (Above 206°F (97°C)), the 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 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 PCM provides ground to the coil of the A/C Condenser 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 PCM to run the fans at high speed. The 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 PCM to turn off the fans. Upon receiving the signal to turn off the fans, the PCM removes ground from the coil of the A/C Condenser 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 PCM to turn off the fans. Upon receiving the signal to turn off the fans, the 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 (V6) 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 212

Rear Window/Power Mirror Defoggers Circuit Diagram (Page 64-1). Scheme 213

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), battery voltage is supplied to the Rear Window Defogger Relay coil and to the Climate Control Unit through fuse 16 (in driver's under-dash fuse/relay box).

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).

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), 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 of by turning the ignition switch to LOCK (0).

Refer to the REAR WINDOW DEFOGGER (V6) ) 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 (Page 73). Scheme 214

Reminder Systems, Safety Indicator, Key Light Timer, And Low Oil Pressure Indicator Circuit Diagram (Page 73-1). Scheme 215

Reminder Systems, Safety Indicator, Key Light Timer, And Low Oil Pressure Indicator Circuit Diagram (Page 73-2). Scheme 216

Gauges and Indicators

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

Gauges And Indicators Circuit Diagram (Page 80). Scheme 217

Gauges And Indicators Circuit Diagram (Page 80-1). Scheme 218

Gauges And Indicators Circuit Diagram (Page 80-2). Scheme 219

Gauges And Indicators Circuit Diagram (Page 80-3). Scheme 220

Gauges And Indicators Circuit Diagram (Page 80-4). Scheme 221

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. Lights On Indicator
12. Low Fuel Indicator
13. Low Oil Pressure Indicator
14. Low Tire Pressure Indicator/TPMS Indicator
15. Message Indicator
16. MIL Indicator
17. Seat Belt Reminder Indicator
18. Security Indicator
19. Side Airbag Cut-off Indicator
20. SRS Indicator
21. VSA OFF Indicator
22. VSA System Indicator

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 5V stabilizer circuit/controller area network controller built-into the gauge control module controls the engine coolant temperature gauge. The PCM provides engine coolant temperature information to the 5V stabilizer circuit/controller area network controller through the fast controller area network (F-CAN) data lines. The PCM receives engine coolant temperature information from ECT Sensor 1.

Fuel Gauge and Low Fuel Indicator

The fuel gauge and low fuel indicator are controlled by the 5V stabilizer circuit/controller area network controller in the gauge control module. When the resistance of the fuel gauge sending unit changes, the 5V stabilizer circuit/controller area network controller 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 5V stabilizer circuit/controller area network controller in the gauge control module. The 5V stabilizer circuit/controller area network controller in the gauge control module receives vehicle speed information from the PCM through the fast controller area network (F-CAN) data lines. The 5V stabilizer circuit/controller area network controller 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 5V stabilizer circuit/controller area network controller in the gauge control module. The 5V stabilizer circuit/controller area network controller in the gauge control module receives engine speed information from the PCM through the fast controller area network (F-CAN) data lines. The 5V stabilizer circuit/controller area network controller 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 .

Tire Pressure Monitoring System Circuit Diagram (Page 85). Scheme 222

Tire Pressure Monitoring System Circuit Diagram (Page 85-1). Scheme 223

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 224

A/T Gear Position Indicator Circuit Diagram (Page 89-1). Scheme 225

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 226

Wiper/Washer Circuit Diagram (Page 91-1). Scheme 227

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 contained in the Under-hood Fuse/Relay Box.

Testing the multiplex components and reading 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 WIPERS/WASHERS (V6) 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), battery voltage is supplied to the Driver's MICU and the Passenger's MICU through fuse 5 (Driver's Under-dash). With the ignition switch in ON (II) or START (III), 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 input 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 Windshield 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 WIPERS/WASHERS (V6) for specific tests and troubleshooting procedures.

Exterior Lights

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

Headlights Circuit Diagram (Page 110). Scheme 228

Headlights Circuit Diagram (Page 110-1). Scheme 229

Headlights Circuit Diagram (Page 110-2). Scheme 230

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 (V6) for specific tests and troubleshooting procedures.

License Plate, Parking, Side Marker Lights, And Taillights Circuit Diagram (Page 110-4). Scheme 231

License Plate, Parking, Side Marker Lights, And Taillights Circuit Diagram (Page 110-5). Scheme 232

License Plate, Parking, Side Marker Lights, And Taillights Circuit Diagram (Page 110-6). Scheme 233

Brake Lights Circuit Diagram (Page 110-6). Scheme 234

Turn Signal And Hazard Warning Lights Circuit Diagram (Page 110-8). Scheme 235

Turn Signal And Hazard Warning Lights Circuit Diagram (Page 110-9). Scheme 236

Back-Up Lights Circuit Diagram (Page 110-10). Scheme 237

Fog Lights Circuit Diagram (Page 110-11). Scheme 238

Fog Lights Circuit Diagram (Page 110-12). Scheme 239

Fog Lights Circuit Diagram (Page 110-13). Scheme 240

High Mount Brake Light (Acura Accessory) Circuit Diagram (Page 110-14). Scheme 241

Interior Lights

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

Ambient Light, Ceiling Light, Footwell Lights, Front Individual Map Lights, And Ignition Key Light Circuit Diagram (Page 114). Scheme 242

Ambient Light, Ceiling Light, Footwell Lights, Front Individual Map Lights, And Ignition Key Light Circuit Diagram (Page 114-1). Scheme 243

Trunk Light Circuit Diagram (Page 114-2). Scheme 244

Door Courtesy Lights Circuit Diagram (Page 114-3). Scheme 245

Vanity Mirror Lights Circuit Diagram (Page 114-4). Scheme 246

Dash And Console Lights Circuit Diagram (Page 114-5). Scheme 247

Dash And Console Lights Circuit Diagram (Page 114-6). Scheme 248

Dash And Console Lights Circuit Diagram (Page 114-7). Scheme 249

Dash And Console Lights Circuit Diagram (Page 114-8). Scheme 250

Dash And Console Lights Circuit Diagram (Page 114-9). Scheme 251

Dash And Console Lights Circuit Diagram (Page 114-10). Scheme 252

Dash And Console Lights Circuit Diagram (Page 114-11). Scheme 253

Dash And Console Lights Circuit Diagram (Page 114-12). Scheme 254

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 255

Entry Light Control System Circuit Diagram (Page 115-1). Scheme 256

Entry Light Control System Circuit Diagram (Page 115-2). Scheme 257

Entry Light Control System Circuit Diagram (Page 115-3). Scheme 258

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 259

Power Windows Circuit Diagram (Page 120-1). Scheme 260

Power Windows Circuit Diagram (Page 120-2). Scheme 261

Power Windows Circuit Diagram (Page 120-3). Scheme 262

Power Windows Circuit Diagram (Page 120-4). Scheme 263

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), 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

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 direction.

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 direction.

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.

Ignition Key Operation

The windows 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, 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 WINDOWS (V6) 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 (Page 122). Scheme 264

Moonroof Circuit Diagram (Page 122-1). Scheme 265

The moonroof is controlled by the moonroof control unit, the interior light/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.

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 ignition switch in ON (II) or START (III), battery voltage is supplied through fuse 5 (Driver's Under-dash) to the Driver's MICU. The CPU uses input from the interior light/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.

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 (V6) for specific tests and troubleshooting procedures.

Keyless/Power Door Locks/Security System (V6)

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 (V6) Circuit Diagram (Page 130). Scheme 266

Keyless/Power Door Locks/Security System (V6) Circuit Diagram (Page 130-1). Scheme 267

Keyless/Power Door Locks/Security System (V6) Circuit Diagram (Page 130-2). Scheme 268

Keyless/Power Door Locks/Security System (V6) Circuit Diagram (Page 130-3). Scheme 269

Keyless/Power Door Locks/Security System (V6) Circuit Diagram (Page 130-4). Scheme 270

Keyless/Power Door Locks/Security System (V6) Circuit Diagram (Page 130-5). Scheme 271

Keyless/Power Door Locks/Security System (V6) Circuit Diagram (Page 130-6). Scheme 272

Keyless/Power Door Locks/Security System (V6) Circuit Diagram (Page 130-7). Scheme 273

The power door locks, keyless entry, and security systems 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 5 (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 that 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 (V6) for specific tests and troubleshooting procedures.

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 (Page 132). Scheme 274

Immobilizer System Circuit Diagram (Page 132-1). Scheme 275

Immobilizer System Circuit Diagram (Page 132-2). Scheme 276

The immobilizer system is designed to prevent the vehicle from being started without the owner's ignition key. If an attempt is made to start the vehicle with any other key, the immobilizer system disables it from starting.

Battery voltage is supplied at all times through fuse 15 (Under-hood) to the immobilizer-keyless control unit and the gauge control module. With the ignition switch in ON (II) or START (III), the immobilizer-keyless control unit and the PCM receive battery voltage through fuse 9 (Driver's Under-dash).

If the proper ignition key is used, the immobilizer-keyless control unit sends a coded signal to the PCM and illuminates the immobilizer system indicator LED for 2 seconds. The coded signal informs the PCM that the proper ignition key is being used. The PCM grounds the Fuel Pump Relay, energizing it to provide power to the fuel pump. Following the first 2 seconds after the ignition switch is turned to ON (II) with the proper ignition key, the immobilizer system indicator LED turns off, and the engine will run under normal operating conditions.

1. When the ignition switch is turned ON, and a programmed immobilizer code is identified, the immobilizer indicator quickly flashes once.
2. The immobilizer system will allow the car to start normally.
3. When the ignition switch is turned OFF, the immobilizer indicator does not come on. Please note that this is different from some previous systems.

Immobilizer system detects a problem

1. When the ignition switch is turned ON, and a programmed immobilizer code is not identified, the immobilizer indicator quickly flashes once and then blinks continuously.
2. The immobilizer system results will vary depending on how quickly the key is turned. If the key is turned quickly from the OFF (0) position to the START (III) position, the vehicle will start and run for approximately 1 second and shut off. If the key is turned to the ON (II) position, delayed there, and then turned to START (III) position, the starter will turn the motor over, but it will not start.
3. When the ignition switch is turned OFF, the immobilizer indicator does not illuminate. Please note that this is different from previous systems.

Refer to the IMMOBILIZER SYSTEM (V6) for specific tests and troubleshooting procedures.

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 277

Trunk Lid Opener Circuit Diagram (Page 134-1). Scheme 278

Trunk Lid Opener Circuit Diagram (Page 134-2). Scheme 279

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 (Page 138). Scheme 280

Interlock System Circuit Diagram (Page 138-1). Scheme 281

Key Interlock

When the Ignition Key is inserted into the Ignition Switch, a ground signal is provided to the Driver's MICU. The Driver's MICU detects the insertion of the Ignition Key through this input. If the shift lever is out of PARK, a ground signal is provided to the Driver's MICU and the Driver's MICU detects that the shift lever is out of PARK through this input. The Driver's MICU provides ground to the Key Interlock Solenoid. The Key Interlock Solenoid is then energized, which prevents the Ignition Switch from being turned to LOCK (0).

Shift Position Interlock

Battery voltage is supplied at all times through Fuse 12 (Under-hood) to the Brake Pedal Position Switch. With the Ignition Switch in ON (II) or START (III), battery voltage is supplied through Fuse 5 (Driver's Under-dash) to the Shift Lock Solenoid. When the brake pedal is pressed, a battery voltage input is supplied to the PCM and the Driver's MICU. If, at the same time, the accelerator pedal is not pressed, the PCM provides ground to the Shift Lock Solenoid. The Shift Lock Solenoid is then energized, allowing the shift lever to be moved from the PARK position.

While the vehicle is in forward motion, the PCM removes ground from the Shift Lock Solenoid. The Shift Lock Solenoid is then de-energized, which disables the shift lever from being moved to REVERSE or PARK.

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

Power Seats

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

Front Passenger's Power Seat Circuit Diagram (Page 140). Scheme 282

Power Mirrors Circuit Diagram (Page 141). Scheme 283

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.

Slide

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

Recline

Recline operation is similar to the slide operation.

Refer to the POWER SEATS (V6) for specific tests and troubleshooting procedures.

Power Mirrors Circuit Diagram (Page 141-1). Scheme 284

The Left and Right Power Mirrors are controlled by the Power Mirror Switch. Each power mirror has two reversible motors: one motor moves the mirror up and down, and the other motor moves the mirror left and right.

The Power Mirror Switch contains three switches to control mirror direction and two switches to select the Left or Right Power Mirror. With the ignition switch in ON (II), battery voltage is supplied to the Power Mirror Switch through fuse 16 (in the driver's under-dash fuse/relay box). The mirror selection switch directs voltage from two of the direction switches to either the Left or Right Power Mirror.

Mirror Up

With the Power Mirror Switch in the UP position, Switch 1 is moved to the A position. Switch 1 supplies battery voltage to the Left Power Mirror Up/Down Motor and the Power Window Master Switch.

If the mirror selection switch is in the LEFT position, the Left Power Mirror Up/Down Motor is grounded through the mirror selection switch and Switch 2 in the B position.

If the mirror selection switch is in the RIGHT position, the signal for UP is sent via UART to the Front Passenger's Power Mirror Switch. The Front Passenger's Power Mirror Switch supplies battery voltage and provides ground to the Right Power Mirror Up/Down Motor.

Mirror Down

With the Power Mirror Switch in the DOWN position, Switches 2 and 3 are moved to the A position. Switch 2 supplies battery voltage to the Left Power Mirror or to the Power Window Master Switch depending on the position of the mirror selection switch.

If the mirror selection switch is in the LEFT position, the Left Power Mirror Up/Down Motor is grounded through Switch 1 in the B position. When Switch 2 is moved to the A position, it also supplies battery voltage to the Left Power Mirror Left/Right Motor. With Switch 3 in the A position, battery voltage is supplied to both sides of the Left Power Mirror Left/Right Motor so it does not move.

If the mirror selection switch is in the RIGHT position, the signal for DOWN is sent via UART to the Front Passenger's Power Mirror Switch. The Front Passenger's Power Mirror Switch supplies battery voltage and provides ground to the Right Power Mirror Up/Down Motor.

Mirror Left

With the Power Mirror Switch in the LEFT position, Switches 1 and 2 are moved to the A position. Switch 2 supplies battery voltage to the Left Power Mirror or to the Power Window Master Switch depending on the position of the mirror selection switch.

If the mirror selection switch is in the LEFT position, the Left Power Mirror Left/Right Motor is grounded through Switch 3 in the B position. When Switch 2 is moved to the A position, it also supplies battery voltage to the Left Power Mirror Up/Down Motor. With Switch 1 in the A position, battery voltage is supplied to both sides of the Left Power Mirror Up/Down Motor so it does not move.

If the mirror selection switch is in the RIGHT position, the signal for LEFT is sent via UART to the Front Passenger's Power Mirror Switch. The Front Passenger's Power Mirror Switch supplies battery voltage and provides ground to the Right Power Mirror Left/Right Motor.

Mirror Right

With the Power Mirror Switch in the RIGHT position, Switch 3 is moved to the A position. Switch 3 supplies battery voltage to the Left Power Mirror or to the Power Window Master Switch depending on the position of the mirror selection switch.

If the mirror selection switch is in the LEFT position, the Left Power Mirror Left/Right Motor is grounded through the mirror selection switch and Switch 2 in the B position.

If the mirror selection switch is in the RIGHT position, the signal for RIGHT is sent via UART to the Front Passenger's Power Mirror Switch. The Front Passenger's Power Mirror Switch supplies battery voltage and provides ground to the Right Power Mirror Left/Right Motor.

Reverse Mirror Control

When the transmission is shifted into reverse with the mirror selection switch in RIGHT, the right power 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 POWER SEATS (V6) 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 (Page 142). Scheme 285

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 286

DPMS Circuit Diagram (Page 143-1). Scheme 287

DPMS Circuit Diagram (Page 143-2). Scheme 288

DPMS Circuit Diagram (Page 143-3). Scheme 289

DPMS Circuit Diagram (Page 143-4). Scheme 290

In the Driving Position Memory System (DPMS), the driver's seat has a memory feature. The four driver's seat adjustments (forward and back, front up and down, rear up and down, and seat back angle) can be regulated separately. All of the adjustments can be memorized at the same time by pressing the MEMO 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 will move to the memorized position.

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.

Refer to the DRIVER POSITION MEMORY SYSTEM (DPMS) (V6) 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 291

Seat Heaters Circuit Diagram (Page 147-1). Scheme 292

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 293

Audio System Circuit Diagram - Without Navigation (Page 150-1). Scheme 294

Audio System Circuit Diagram - Without Navigation (Page 150-2). Scheme 295

Audio System Circuit Diagram - Without Navigation (Page 150-3). Scheme 296

Audio System Circuit Diagram - Without Navigation (Page 150-4). Scheme 297

Audio System Circuit Diagram - Without Navigation (Page 150-5). Scheme 298

Audio System Circuit Diagram - Navigation (Page 150-6). Scheme 299

Audio System Circuit Diagram - Navigation (Page 150-7). Scheme 300

Audio System Circuit Diagram - Navigation (Page 150-8). Scheme 301

Audio System Circuit Diagram - Navigation (Page 150-9). Scheme 302

Audio System Circuit Diagram - Navigation (Page 150-10). Scheme 303

Audio System Circuit Diagram - Navigation (Page 150-11). Scheme 304

Audio System Circuit Diagram - Navigation (Page 150-12). Scheme 305

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 - Without Navigation (Page 152). Scheme 306

HFL System (HandsFreeLink) Circuit Diagram - Without Navigation (Page 152-1). Scheme 307

HFL System (HandsFreeLink) Circuit Diagram - Without Navigation (Page 152-2). Scheme 308

HFL System (HandsFreeLink) Circuit Diagram - Without Navigation (Page 152-3). Scheme 309

HFL System (HandsFreeLink) Circuit Diagram - Without Navigation (Page 152-4). Scheme 310

HFL System (HandsFreeLink) Circuit Diagram - Without Navigation (Page 152-5). Scheme 311

HFL System (HandsFreeLink) Circuit Diagram - Without Navigation (Page 152-6). Scheme 312

HFL System (HandsFreeLink) Circuit Diagram - Without Navigation (Page 152-7). Scheme 313

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 314

AcuraLink Circuit Diagram (Page 153-1). Scheme 315

AcuraLink Circuit Diagram (Page 153-2). Scheme 316

AcuraLink Circuit Diagram (Page 153-3). Scheme 317

AcuraLink Circuit Diagram (Page 153-4). Scheme 318

AcuraLink Circuit Diagram (Page 153-5). Scheme 319

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 320

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 - USA, Canada (Page 155). Scheme 321

Accessory Power Socket/Cigarette Lighter

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

Accessory Power Socket/Cigarette Lighter Circuit Diagram - Mexico (Page 155-1). Scheme 322

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 - Without AcuraLink (Page 156). Scheme 323

Navigation System Circuit Diagram - Without AcuraLink (Page 156-1). Scheme 324

Navigation System Circuit Diagram - Without AcuraLink (Page 156-2). Scheme 325

Navigation System Circuit Diagram - Without AcuraLink (Page 156-3). Scheme 326

Navigation System Circuit Diagram - Without AcuraLink (Page 156-4). Scheme 327

Navigation System Circuit Diagram - Without AcuraLink (Page 156-5). Scheme 328

Navigation System Circuit Diagram - Without AcuraLink (Page 156-6). Scheme 329

Navigation System Circuit Diagram - AcuraLink (Page 156-7). Scheme 330

Navigation System Circuit Diagram - AcuraLink (Page 156-8). Scheme 331

Navigation System Circuit Diagram - AcuraLink (Page 156-9). Scheme 332

Navigation System Circuit Diagram - AcuraLink (Page 156-10). Scheme 333

Navigation System Circuit Diagram - AcuraLink (Page 156-11). Scheme 334

Navigation System Circuit Diagram - AcuraLink (Page 156-12). Scheme 335

Navigation System Circuit Diagram - AcuraLink (Page 156-13). Scheme 336

Navigation System Circuit Diagram - AcuraLink (Page 156-14). Scheme 337

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

Battery voltage is supplied with the ignition switch in the ACC (I) or ON (II) position through fuse 18 (Driver's Under-dash) to the audio-audio-navigation unit, navigation display unit and the interface dial.

The audio-audio-navigation unit, navigation display unit, and the interface dial are the main components of the navigation system. The navigation display unit does not have a touch panel. Instead, an interface dial and audio/navigation switch panel allows control of the navigation system. The audio-audio-navigation unit, and navigation display unit communicate with each other through the GA-Net II communication bus. The audio-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 unit and climate control unit control the audio, climate, and time data displayed on this device. The time is updated by the audio-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 PCM, and the yaw rate sensor contained in the audio-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-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-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-audio-navigation unit in order to determine the position of the vehicle.

Other Navigation Inputs

The audio-audio-navigation unit uses the vehicle speed signal from the PCM, a yaw rate sensor (in the audio-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-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 unit, XM receiver, and USB adapter control unit. Data passed on this bus includes manual audio control functions, like XM station selection, audio voice commands from the driver, and the muting signal from the audio-audio-navigation unit.

COMM - BUS (HFL)

The navigation system is fully integrated with the HandsFreeLink (HFL). This high-speed bus communicates with the audio-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 is 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 (V6) 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 (V6) for troubleshooting information.

Climate Bus

The climate bus connects the audio-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 unit orchestrates all muting logic. All voice commands are broadcast over the left 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 - Without AcuraLink (Page 156-16). Scheme 338

Navigation System Diagram - AcuraLink (Page 156-17). Scheme 339

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 340

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 341

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 342

See also:
• OEM COMPONENT LOCATION
• OEM CONNECTOR END VIEWS
• CRUISE CONTROL (V6)
• MULTIPLEX INTEGRATED CONTROL SYSTEM (V6)
• FAN CONTROLS (V6)
• REAR WINDOW DEFOGGER (V6)
• WIPERS/WASHERS (V6)
• EXTERIOR LIGHTS (V6)
• POWER WINDOWS (V6)
• MOONROOF (V6)
• KEYLESS/POWER DOOR LOCKS/SECURITY SYSTEM (V6)
• IMMOBILIZER SYSTEM (V6)
• A/T INTERLOCK SYSTEM
• POWER SEATS (V6)
• DRIVER POSITION MEMORY SYSTEM (DPMS) (V6)
• INTERLOCK SYSTEM
• Keyless/Power Door Locks/Security System (V6)
• GAUGES AND INDICATORS
• LOW OIL PRESSURE INDICATOR
• Multiplex Integrated Control System