2006 ACURA CSX warning

µ
µ
µ

Î
(#')
µ
µ
µ
µ µ
µ
Special Tools Required
YES
NO
YES
NO YES
NO
K20Z3 engine
11-405
Fuel Cap Warning Message System Troubleshooting
AB
C A
B
C 07JAZ-001000B
 Vacuum/pressure gauge, 0 4 in.Hg 07JAZ-001000B
 Vacuum pump/gauge, 0 30 in.Hg, Snap-on YA4000A
or equivalent, commercially available
Do this procedure if the fuel cap warning message
comes on frequently, or if the message does not go off
after the fuel fill cap is tightened and the vehicle is
driven several days.
1. Check the fuel fill cap (the cap must say TIGHTEN TO CLICK). It should turn 1/4 after it’s tight, then it
clicks.
Go to step 2.
Replace or tighten the cap, then go to step 13.
2. Check the fuel fill cap seal (A) and the fuel fill pipe mating surface (B). Verify that the fuel fill cap tether
cord (C) is not caught under the cap.
Replace the fuel fill cap or the fuel fill pipe,
then go to step 13.
Go to step 3. 3. Reinstall and tighten the fuel fill cap.
4. Clear the DTC with the HDS.
5. Start the engine. Hold the engine speed at
3,000 rpm without load (in neutral) until the
radiator fan comes on, then let it idle for 1 minute.
6. Test drive at 72 km/h (45 mph) for 1 minute or more.
Go to step 7.
Intermittent failure, the system is OK at this
time.
7. Turn the ignition switch to LOCK (0).
8. Disconnect the vacuum hose (A) from the EVAP canister purge valve (B) in the engine compartment,
and connect a T-fitting (C) between the vacuum
gauge and the vacuum pump/gauge 0 30 in.Hg,
and the EVAP canister purge valve as shown.
(cont’d)
Is the correct f uel f ill cap installed and properlytightened?
Is the f uel f ill cap seal missing or damaged, is thef uel f i l l pi pe d amaged , or i s t he t et her cor d caughtund er the cap? Does f uel cap w ar ni ng message come on?
08/08/21 14:33:26 61SNR030_110_0405
ProCarManuals.com
DYNOMITE -2009-

µ
µ
µ
µ
YES
NO
YES
NO
11-406 EVAP System
Fuel Cap Warning Message System Troubleshooting (cont’d)
9. Turn the ignition switch to ON (II).
10. Apply about 2 kPa (15 mmHg, 0.6 in.Hg) of vacuum to the hose.
11. Select the EVAP PCS ON in the INSPECTION MENU with the HDS.
Check for a blockage at the EVAP canister
purge line between EVAP canister purge valve and
the EVAP canister, then go to step 12.
Replace the EVAP canister purge valve
(see page 11-409), then go to step 12.
12. Reconnect all hoses.
13. Turn the ignition switch to ON (II).
14. Reset the ECM with the HDS.
15. Do the ECM idle learn procedure (see page 11-310).
16. Start the engine. Hold the engine speed at 3,000 rpm without load (in neutral) until the
radiator fan comes on, then let it idle for 1 minute.
17. Test drive at 72 km/h (45 mph) for 1 minute or more.
Go to step 1 and recheck.
Troubleshooting is complete.
Does t he v acuum r el ease i mmed i at el y ?
Does t he f uel cap message come on?
08/08/21 14:33:26 61SNR030_110_0406
ProCarManuals.com
DYNOMITE -2009-

(#'
/)
Body Electrical
Body Electrical..................................
..................................
Relay and Control Unit
Locations . 22-7
................
Connectors and Harnesses . 22-13
........................
........................
Fuse/Relay Boxes . 22-58
......................
......................
Power Distribution . 22-60
....................
....................
Ground Distribution . 22-64
Under-hood Fuse/Relay Box
Under-dash Fuse/Relay Box
Battery
Relays
Ignition Switch
Multiplex Integrated Control System Keyless/Power Door Locks/Security
System
Horns
Exterior Lights
Turn Signal/Hazard Warning Lights
Interior Lights.............................................. .....
..............................................
.....
Special Tools . 22-2
General Troubleshooting Information . 22-3
.......................... ..........................
Removal and Installation . 22-65
..........................
..........................
Removal and Installation . 22-66
.......................................................................................... .............
................................................
.......................................... .............
Battery Test
. 22-67
Battery Terminal Disconnection and Reconnection . 22-68
Battery Removal and Installation . 22-69
.......................................
.......................................
Power Relay Test . 22-70
............................................................. ..............................................
.............................................................
..............................................
Test
. 22-72
Replacement . 22-72
...................... .....
......................
...................................
.........................
..........................
.......................... .........................
............
................
.......................................... ................................
......................................... ......................
.....
......................
...................................
.........................
..........................
.......................... .........................
............
................
.......................................... ................................
.........................................
Component Location Index
. 22-73
General Troubleshooting Information . 22-74
DTC Troubleshooting Index . 22-77
System Description . 22-80
Troubleshooting-B-CAN System Diagnosis Test Mode A . 22-93
Troubleshooting-B-CAN System Diagnosis Test Mode B . 22-94
Troubleshooting-B-CAN System Diagnosis Test Mode C . 22-95
Troubleshooting-B-CAN System Diagnosis Test Mode D . 22-96
Troubleshooting-B-CAN System Diagnosis Test Mode 1 and
Test Mode 2 (Without the HDS) . 22-97
Sleep and Wake-up Mode Test . 22-99
Circuit Diagram . 22-100
DTC Troubleshooting . 22-102
MICU Input Test . 22-109 ......................
...................................
.......................................... ......................................................
.............................
......................................... ................................................
............................... ...............................
....................................... .................
......................
...................................
.......................................... ......................................................
.............................
......................................... ................................................
............................... ...............................
....................................... .................
Component Location Index
. 22-112
System Description . 22-114
Circuit Diagram . 22-116
DTC Troubleshooting . 22-120
Symptom Troubleshooting . 22-126
Tripped Sensor History . 22-130
MICU Input Test . 22-131
Door Lock Actuator Test . 22-137
Door Lock Knob Switch Test . 22-138
Door Lock Switch Test . 22-139
Door Key Cylinder Switch Test . 22-140
Trunk Lid Release Actuator Test . 22-141
Hood Switch Test . 22-141
Transmitter Test/Replacement . 22-142
......................
.......................................... ............................
....................................... ......................
.......................................... ............................
.......................................
Component Location Index
. 22-145
Circuit Diagram . 22-146
Horn Test/Replacement . 22-146
Horn Switch Test . 22-147
......................
.......................................... ................................
.........................................
........................................... ..............................
............................... ........
............................... .............................
.............................
................................
..................................... ............................... ........................................
.............
......................
.......................................... ................................
.........................................
........................................... ..............................
............................... ........
............................... .............................
.............................
................................
..................................... ............................... ........................................
.............
Component Location Index
. 22-148
Circuit Diagram . 22-150
DTC Troubleshooting . 22-157
MICU Input Test . 22-163
Combination Light Switch Test/ Replacement . 22-166
HID Bulb Replacement . 22-168
HID Unit Replacement . 22-169
HID Lamp System Troubleshooting . 22-170
Headlight Adjustment . 22-173
Headlight Replacement . 22-174
Fog Light Replacement . 22-175
Fog Light Adjustment . 22-176
Bulb Replacement . 22-177
Taillight Replacement . 22-179
Inner Taillight Replacement . 22-179
License Plate Light Replacement . 22-180
High Mount Brake Light Replacement . 22-180
Brake Pedal Position Switch Test . 22-181
......................
.......................................... ................................
.........................................
.................................. .......
......................
.......................................... ................................
.........................................
.................................. .......
Component Location Index
. 22-182
Circuit Diagram . 22-184
DTC Troubleshooting . 22-186
MICU Input Test . 22-188
Hazard Warning Switch Test/Replacement . 22-192
Side Turn Signal Light Replacement . 22-192
......................
..........................................
........................................... ...............
.......................... ............
.................... ................
...................... .............
......................
..........................................
........................................... ...............
.......................... ............
.................... ................
...................... .............
Component Location Index
. 22-193
Circuit Diagram . 22-194
Front Individual Map Light Test/ Replacement . 22-196
Ceiling Light Test/Replacement . 22-197
Trunk Light Replacement . 22-197
Ambient Light Test/Replacement . 22-198
Courtesy Light Replacement . 22-198
Glove Box Light Test/Replacement . 22-199
Vanity Mirror Light Test/Replacement . 22-199
Interior Light Switch Test/Replacement . 22-200
Trunk Lid Latch Switch Test . 22-200
Footwell Light Test/Replacement . 22-201
08/08/21 14:22:03 61SNR030_220_0002
ProCarManuals.com
DYNOMITE -2009-

•••
•••
•••
•••
(#')
 Under-hood Fuse/Relay Box
Fuse
Number Amps Component(s) or Circuit(s) Protected
22-60Power Distribution
Fuse to Components Index
1 100 A
(BAT)Battery, Power distribution
70 A
(EPS) EPS control unit
250A (IG)Ignition switch
80 A
60 A
(OPTION) No. 5, No. 6, No. 7, No. 27, No. 28, No. 29, and No. 31 fuses (in the under-dash fuse/relay box)
330A (ABS MTR) ABS modulator-control unit , VSA modulator-control unit
30 A
40 A
(ABS FSR) ABS modulator-control unit , VSA modulator-control unit
450A (H/L)No. 18, No. 19, No. 20, and No. 21 fuses (in the under-dash fuse/relay box)
40 A
(P/W) No. 24, No. 25, No. 26, No. 30, No. 32, and No. 33 fuses (in the under-dash fuse/relay box), Power window relay
(in the under-dash fuse/relay box)
5 Not used
6 20 A A/C condenser fan motor (via A/C condenser fan relay)
7 20 A Radiator fan motor (via radiator fan relay)
8 30 A Noise condenser (via rear window defogger relay), Rear window defogger (via rear window defogger relay)
9 40 A Blower motor (via blower motor relay)
10 10 A MICU (turn signal/hazard warning lights circuit)
11 15 A A/F sensor (Sensor 1) (via PGM-FI subrelay), EVAP canister vent shut valve (via PGM-FI subrelay), PGM-FI subrelay, No. 15 fuse (in the under-hood fuse/relay box) (via PGM-FI subrelay)
12 15 A Brake lights, ECM/PCM, Horn, MICU
13 Not used
14 Not used
15 7.5 A A/C condenser fan relay
16 Not used
17 15 A Stereo amplifier
18 15 A Ignition coil relay, Ignition coils (via Ignition coil relay)
19 15 A CKP sensor (via PGM-FI main relay 1), CMP sensor B (via PGM-FI main relay 1), ECM/PCM, ETCS control relay, Injectors (via PGM-FI main relay 1), PGM-FI main relay 1 (FI MAIN), PGM-FI main relay 2 (FUEL PUMP)
20 7.5 A A/C compressor clutch (via A/C compressor clutch relay)
21 15 A ECM/PCM (via ETCS control relay)
22 7.5 A Ceiling light, Courtesy lights, Front individual map lights, Ignition key light, Trunk light, Vanity mirror lights
23 10 A Audio unit , Data link connector (DLC), Gauge control module (speedo), Gauge control module (tach), HandsFreeLink control unit , Immobilizer-keyless control unit, MICU, Moonroof switch, Navigation unit
1: ’06-07 models
2: ’08-09 models
3: ’06-07 Touring and Premium models
4: ’07 TYPE S and ’08-09 models
5: ’08-09 models
6: TYPE S model
7: Without navigation system
8: With navigation system
9: ’09 model with navigation system
1
2
34
3
4 34
6 5
7 9 8
08/08/21 14:24:02 61SNR030_220_0062
ProCarManuals.com
DYNOMITE -2009-

•••
•••´
´
•••
Under-dash Fuse/Relay Box
Fuse
Number Amps
Component(s) or Circuit(s) Protected
22-62Power Distribution
Fuse to Components Index (cont’d)
1 7.5 A Power mirror switch light
2 15 A ECM/PCM, Fuel pump (via PGM-FI main relay 2), Immobilizer-keyless control unit
3 10 A Alternator, CMP sensor A, ECM/PCM (via brake pedal position switch), ELD, EVAP canister purge valve, MAF
sensor/IAT sensor, Reverse lockout solenoid , Secondary HO2S (sensor 2)
4 7.5 A ABS modulator-control unit , EPS control unit, VSA modulator-control unit , Yaw rate-lateral acceleration sensor
5 15 A Seat heaters (via seat heater relays)
6 20 A Fog light relay, Fog lights (via fog light relay)
7 Not used
8 Not used
9 7.5 A ODS unit, Passenger’s airbag cutoff indicator, SRS unit
10 7.5 A Back-up light (M/T), Gauge control module (speedo), Gauge control module (tach), MICU, Shift lock solenoid (A/T), TPMS control unit
11 10 A SRS unit
12 10 A Right headlight (high beam)
13 10 A Left headlight (high beam)
14 7.5 A Audio unit light , Climate control unit light, Dash lights brightness controller and odometer select/reset switch light, Driver’s footwell light , Driver’s seat heater switch light, Glove box light, Hazard warning switch light,
Moonroof switch light, Navigation unit , Park pin switch light (A/T), Passenger’s airbag cutoff indicator light,
Passenger’s footwell light , Passenger’s seat heater switch light, Steering wheel switches light (via cable reel),
VSA OFF switch light
15 7.5 A Parking lights, Taillights, License plate lights, Side marker lights
16 10 A Right headlight (low beam) 15 A Right HID unit
17 10 A Left headlight (low beam) 15 A Left HID unit
18 20 A MICU ( B H/L HI)
19 15 A MICU ( B SMALL LT)
20 Not used
1: ’06-07 Touring and Premium models
2: ’07 TYPE S and ’08-09 models
3: ’08-09 models
4: TYPE S model
5: With HID
6: Without HID
7: TYPE S and ’08 Premium and ’09 models
8: Without navigation system
9: With navigation system
4
1 2
2
7
3
8 49
4
6
5
6
5
08/08/21 14:24:03 61SNR030_220_0064
ProCarManuals.com
DYNOMITE -2009-

Power Supply Voltage Monitoring Function
Entry Lights Control System
Lighting System (Headlights, Parking Lights, Fog Lights, Side Marker Lights, License Plate
Lights, and Taillights)
Daytime Running Lights
Turn Signal/Hazard Warning Lights
Door Lock Response Operation
Power Window Key-off Operation
InputOutput
Input Output
Input Output
Input Output
Input Output
Input Output
Input Output
22-85
The MICU monitors the power supply voltage (back-up voltage). If the voltage goes below 10 V, the MICU sends a MICU message and will not
store DTCs.
MICU Battery voltage MICU : MICU internal circuit
The MICU controls the ceiling light ON/OFF and dimming based upon input signals from each switch. MICU IG1 power supply Ignition key switch
Driver’s door switch
Front passenger’s door switch
Left rear door switch
Right rear door switch
Driver’s door lock knob switch (LOCK) Interior light
B-CAN Keyless LOCK signal
The MICU contains the relay circuits for the headlight high/low beams and taillights, and controls the lighting system ON/OFF based upon input
signals from the combination light switch. MICU Headlight OFF switch Headlight ON switch
Fog light switch
Dimmer switch
Combination light switch (parking lights, side marker lights,
license plate lights, and taillights)
Passing switch Headlights (low beam)
Headlights (high beam)
Parking lights
Fog lights
Side marker lights
License plate lights
Taillights
The MICU controls the exterior lights as a daytime running lights based upon input signals from each switch. MICU Headlight OFF switch Headlight ON switch
Dimmer switch
Combination light switch (parking lights, side marker lights,
license plate lights, and taillights)
Passing switch Headlights (low beam)
Headlights (high beam)
Parking lights
Slide marker lights
License plate lights
Taillights
B-CAN Transmission range switch (P position)
The MICU controls the turn signal/hazard warning lights based upon input signals from the turn signal and hazard warning switches. MICU IG1 power supply Turn signal switch (left/right)
Hazard warning switch Turn signal lights (left/right)
The MICU controls the door lock actuators based upon B-CAN signals. B-CAN Door lock signals Door lock actuator (LOCK/UNLOCK) Driver’s door lock actuator (UNLOCK)
Trunk lid release actuator
The MICU controls the power windows key-off operation based upon input signals from each switch. MICU IG1 power supply Ignition key switch
Driver’s door switch
Front passenger’s door switch Power window key-off timer
(cont’d)
08/08/21 14:24:09 61SNR030_220_0087
ProCarManuals.com
DYNOMITE -2009-

µ
µ
HDS Inputs and Commands
Input:System Menu Data List Data List Indication
22-88Multiplex Integrated Control System
System Description (cont’d)
Certain inputs happen so quickly that the HDS cannot update fast enough. Hold the switch that is being tested while monitoring the Data List.
This should give the HDS time to update the signal on the Data List.
Because the HDS software is updated to support the release for newer vehicles it is not uncommon to see system function tests that are not
supported.
Make sure that the most current software is loaded.
Gauges Cruise Control Main Switch OFF/ON Cruise Control Set Switch OFF/ON
Cruise Control Resume Switch OFF/ON
Washer Fluid Level Switch OFF/ON
VSA/TCS Off Switch OFF/ON
Gauge Select/Reset Switch OFF/ON
Parking Brake Switch OFF/ON
Brake Fluid Level Switch OFF/ON
Illumination Volume Plus Switch OFF/ON
Illumination Volume Minus Switch OFF/ON
Km/h mph Select Switch OFF/ON
Fuel Sending Unit Input 1 deg
Fuel Sending Unit Input 2 VOLTAGE
VSA/TCS Active Indicator OFF/ON
VSA/TCS Indicator (Warning) OFF/ON
ABS Indicator OFF/ON
Cruise Control Main Switch Indicator OFF/ON
MIL Indicator OFF/ON
Washer Fluid Level Indicator OFF/ON
DRL Indicator OFF/ON
Low Oil Pressure Indicator OFF/ON
Charging System Indicator OFF/ON
Cruise Main Switch ON Indicator OFF/ON
Maintenance Minder Indicator OFF/ON
High Beam Indicator OFF/ON
Parking Light ON Indicator OFF/ON
Low Fuel Warning Indicator OFF/ON
Security Indicator OFF/ON
Fog Light Indicator OFF/ON
Seat Belt Indicator OFF/ON
Speed Indicator (km/h) 0 249 km/h, over 250 km/h, Fail
Speed Indicator (mph) 0 154 mph, over 155 mph, Fail
Low Tire Pressure Indicator OFF/ON
TPMS Indicator OFF/ON
A/TGearPositionSwitch(R) OFF/ON
A/TGearPositionSwitch(P) OFF/ON
08/08/21 14:24:09 61SNR030_220_0090
ProCarManuals.com
DYNOMITE -2009-

µ
µ
MICU
Item
YES
NO
22-98Multiplex Integrated Control System
Troubleshooting - B-CAN System Diagnosis Test Mode 1 and Test Mode 2
(without the HDS) (cont’d)
Driver’s door lock switch (UNLOCK)
Driver’s door lock switch (LOCK)
Driver’s door lock knob switch (UNLOCK)
Driver’s door lock knob switch (LOCK)
Driver’s door key cylinder switch (UNLOCK)
Driver’s door key cylinder switch (LOCK)
Front passenger’s door lock switch (UNLOCK)
Front passenger’s door lock switch (LOCK)
Front passenger’s door lock knob switch
(UNLOCK)
Left rear door lock knob switch (UNLOCK)
Right rear door lock knob switch (UNLOCK)
Driver’s door switch (OPEN)
Front passenger’s door switch (OPEN)
Left rear door switch (OPEN)
Right rear door switch (OPEN)
Trunk lid latch switch (OPEN)
Audio switch
Windshield wiper HI/LO switch
Windshield wiper INT/LO switch
Windshield wiper MIST switch
Windshield washer switch (ON)
Windshield wiper intermittent dwell time
controller
Windshield wiper motor park switch
Turn signal switch (LEFT)
Turn signal switch (RIGHT)
Hazard warning switch (ON)
Headlight switch (ON)
Headlight switch (OFF)
Lighting switch (ON)
Dimmer switch (ON)
Passing switch (ON)
Fog light switch (ON)
Hood switch (OPEN)
A/C pressure switch/thermal protector
Transmission range switch (P)
Ignition key cylinder switch
Brake switch (ON)
: A second key is necessary to check the key cylinder inputs.
Be sure to rotate the key cylinder switch two
times to each position (lock and lock, unlock
and unlock) to ensure the door lock knob
switch is in the appropriate position. Go to function and input test for the system
related to the failure.
Repair the open, short, or replace the faulty
switch.
Does the ceiling light work properly in all switch posi t i ons?
08/08/21 14:24:59 61SNR030_220_0100
ProCarManuals.com
DYNOMITE -2009-