2006 ACURA CSX change time

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DTC 27-23: DTC 27-24:
YES
NO YES
NO
19-13519-135
Steering Angle Sensor Counter
Malfunction Steering Angle Sensor Exchange
Malfunction
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Turn the ignition switch to LOCK (0), then turn it to
ON (II) again.
4. Turn the steering wheel from lock to lock.
5. Check for DTCs with the HDS.
Replace the steering angle sensor (see page
19-168).
Intermittent failure, the system is OK at this
time. 1. Turn the ignition switch to ON (II), and set the front
wheels to the straight ahead position.
2. Turn the steering wheel one turn to the left. Check the STEERING ANGLE in the VSA DATA LIST with
the HDS.
Intermittent failure, the system is OK at this
time.
Replace the steering angle sensor (see page
19-168).
Is DTC 27-23 indicated? Is t her e about 288 d egr ees t o 432 d egr ees
posi t i v e?
08/08/21 15:05:55 61SNR030_190_0135
ProCarManuals.com
DYNOMITE -2009-

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DTC 66-15: DTC 68-21:
YES
NO
YES
NO YES
NO
YES
NO
19-14919-149
Pressure Sensor (Inside of VSA
Modulator-control Unit) Malfunction Brake Pedal Position Switch Stuck
OFF
1. Test-drive the vehicle.
NOTE: Drive the vehicle on the road, not on a lift.
2. Turn the ignition switch to LOCK (0).
3. Raise the vehicle, and support it with safety stands in the proper locations (see page 1-11).
4. Turn all four wheels by hand.
Repair the brake drag.
Go to step 5.
5. Turn the ignition switch to ON (II).
6. Check the BRAKE PRESS in the VSA DATA LIST with the HDS while moving the brake pedal.
Intermittent failure, the system is OK at this
time.
Replace the VSA modulator-control unit
(see page 19-171). 1. Start the engine.
2. Check the BRAKE PRESS in the VSA DATA LIST
with the HDS. Do not press the brake pedal.
Go to step 3.
Check for brake drag or a misadjusted brake
pedal position switch. If they are normal, replace
the VSA modulator-control unit (see page 19-171).
3. Check the BRAKE SWITCH in the VSA DATA LIST with the HDS while moving the brake pedal.
Intermittent failure, the system is OK at this
time. Check for loose terminals between the brake
pedal position switch 4P connector, ECM/PCM
connector A (44P), and the VSA modulator-control
unit 37P connector. Refer to intermittent failures
troubleshooting (see page 19-98).
Go to step 4.
4. Turn the ignition switch to LOCK (0).
5. Disconnect the brake pedal position switch 4P connector.
(cont’d)
Is there brake drag?Does t he i nd i cat ed v al ue change? I s t her e 10 M Pa or l ess?
Does i t i nd i cat e ON w hen t he ped al i s pr essed ,and OF F w hen t he ped al i s r el eased ?
08/08/21 15:05:58 61SNR030_190_0149
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DTC 68-22:
YES
NO
YES
NO
YES
NO YES
NO
19-151
BRAKE PEDAL POSITION SWITCH 4P CONNECTOR
BKSW (LT GRN)
Brake Pedal Position Switch Stuck
ON
1. Turn the ignition switch to ON (II).
2. Check the BRAKE PRESS in the VSA DATA LIST
with the HDS. Do not press the brake pedal.
Check the brake pedal height and the brake
pedal position switch adjustment (see page 19-6). If
the brake pedal height is OK, replace the VSA
modulator-control unit and the brake pedal position
switch adjustment (see page 19-171).
Go to step 3.
3. Check the BRAKE SWITCH in the VSA DATA LIST with the HDS while moving the brake pedal.
Intermittent failure, the system is OK at this
time.
Go to step 4.
4. Check the BRAKE SWITCH in the VSA DATA LIST with the HDS, and disconnect the brake pedal
position switch 4P connector.
Inspect the brake pedal switch and
adjustment (see page 19-6). If the switch and
adjustment are OK, replace the brake pedal
position switch (see page 19-6).
Go to step 5. 5. Turn the ignition switch to LOCK (0).
6. Short the SCS line with the HDS.
7. Disconnect ECM/PCM connector A (44P).
8. Turn the ignition switch to ON (II).
9. Measure the voltage between brake pedal position
switch 4P connector terminal No. 2 and body
ground.
Repair short to power in the wire between
the ECM/PCM and the brake pedal position
switch.
Update the ECM/PCM if it does not have the
latest software (see page 11-227), or substitute a
known-good ECM/PCM (see page 11-7), then go to
step 1, and recheck. If the ECM/PCM was updated
and DTCs are not indicated, troubleshooting is
complete. If the ECM/PCM was substituted and
DTCs are not indicated, replace the original ECM/
PCM (see page 11-228).
Wire side of female terminals
Is it 10 MPa or more?
Does i t i nd i cat e ON w hen t he ped al i s pr essed ,and OF F w hen t he ped al i s r el eased ?
Does t he i nd i cat or change f r om ON t o OF F ? Is t her e 0.1 V or mor e?
08/08/21 15:06:41 61SNR030_190_0151
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DYNOMITE -2009-

Displaying Sensor Inputs at the Climate Control Unit
Check these items before using the sensor input display mode
To run the sensor input display mode, follow these steps
21-13
The climate control unit has a mode that displays the sensor inputs it receives. This mode shows you what data the
climate control unit is receiving from each of the sensors, one at a time, and it can help you determine if a sensor is
faulty.1. Turn the ignition switch to ON (II), and check the recirculation door function; press the recirculation button to switch from FRESH to RECIRC. The air volume and sound should change slightly.
2. Set the temperature control knob to the desired test temperature. When selecting the test temperature, note these items:
 ‘‘Lo’’ temperature setting will default to MAX COOL, VENT, and RECIRC.
 ‘‘Hi’’ temperature setting will default to MAX HOT, FLOOR, and FRESH.
 19 through 31 °C settings will use the automatic climate control logic.
3. Turn the ignition switch to LOCK (0).
1. Turn the ignition switch to LOCK (0).
2. Press and hold both the AUTO and MODE buttons, then start the engine.
3. After the engine starts, release both buttons. The display panel will flash the sensor number and then the value for that sensor. Record the value displayed.
4. To advance to the next sensor, press the A/C button. Sensor Item Displayed Value1 Mode Positioning BIT
2 In-car Temperature °C
3 Outside Air Temperature °C
4 Solar Radiation Sensor Value: Dark = 00, Flashlight = 04, Cloudy = 10, Sunny = 65 10 kcal/m ·h
5 Evaporator Outlet Air Temperature °C
6 Air Mix Opening (Low value indicates cooler air distribution, higher value indicates warmer air distribution) % of opening
7 Recirculation Opening % of opening
8 Vehicle Speed (Vehicle must be driven to display speed) km/h
9 Engine Coolant Temperature °C
A Vent Temperature Air Out (TAO) °C
NOTE:  The sensor values will be displayed in degrees Celsius (°C) or an alphanumeric code. Use the chart to convert the value to degrees Fahrenheit (°F).
 If the sensor value displays ‘‘Er’’ this indicates there is an open or short in the circuit or sensor. Check for DTCs using the HDS, or use the climate control self-diagnostic function.
 If necessary, compare the sensor input display to a known-good vehicle under the same test conditions.
 If the sensor is out of the normal range, refer to the sensor test or substitute a known-good sensor, and recheck.
5. To cancel the sensor input display mode, press the AUTO button or turn the ignition switch to LOCK (0). (cont’d)
2
08/08/21 14:40:58 61SNR030_210_0014
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21-97
A/C System Noise Check
 Air conditioning refrigerant or lubricant vaporcan irritate your eyes, nose, or throat.
 Be careful when connecting service equipment.
 Do not breathe refrigerant or vapor.
The A/C system noise check will help you determine the
source of abnormal A/C system noise.
NOTE:  If accidental system discharge occurs, ventilate the work area before resuming service.
 Additional health and safety information may be obtained from the refrigerant and lubricant
manufacturers.
 Identify the conditions when the noise occurs. The weather, the vehicle speed, the vehicle being in gear
or in neutral, the engine temperature, or other
conditions may be factors in determining the noise
source.
 Do an A/C system inspection (see page 21-6), and correct any problems found prior to diagnosing
abnormal noises.
 Abnormal A/C noises can be misleading. For example,
a sound similar to a failed bearing may be caused by
loose fasteners, loose mounting brackets, or faulty
compressor clutch assembly.
1. Inspect the air inlet grille in the cowl cover for debris. If debris is present, remove it.
2. Sit inside the vehicle, close the doors and windows, and turn the ignition switch to ON (II), but do not
start the engine. Cycle the HVAC system through all
blower speeds and all air distribution modes to
determine where and when the noise occurs. 3. Operate the blower at each speed with the engine
and A/C off, and check for unusual noises and
excessive vibration. If noise and/or vibration are
present, do the following checks:
–1 If the noise or vibration occurs only in a specific mode or setting, then check these
items: Operation of the mode control motor, door, and linkage
 Operation of the air mix control motor(s), door(s), and linkage
 Operation of the recirculation motor, door, and linkage
–2 If there is a squeaking or chirping noise, but no unusual vibration, replace the blower motor
(see page 21-77).
–3 Remove the blower unit (see page 21-76), and check for foreign material (leaves or twigs, for
example) on the blower motor and fan. If
foreign material is present, remove it, and
recheck for noise. If you don’t find any foreign
material, remove the blower motor (see page
21-77), and check these items: Check if the fan blades are cracked or broken
 Make sure the fan retainer is tight
 Inspect the fan alignment on the blower motor shaft
Replace the blower motor if any problems are
present.
4. Set up the vehicle for the running A/C che cks:
 Select a quiet area for testing
 Apply the parking brake
 Shift the vehicle in PARK or in Neutral
 Start the engine
 Set the temperature control dial to Max Cool
 Set the mode control switch to Vent
 Set the fan control dial to minimum (but not OFF)
 Turn the A/C switch ON
Switch the compressor on and off several times to
clearly identify the sound during A/C compressor
operation. Listen to the noise while the A/C
compressor clutch is engaged and disengaged.
Probe the A/C system with a stethoscope to
pinpoint the noise.
NOTE: If the noise does not change when the A/C
compressor clutch engages or disengages, the
noise may be caused by an engine-related
component. Probe the engine area with a
stethoscope to pinpoint the noise. (cont’d)
08/08/21 14:44:54 61SNR030_210_0098
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22-99
Sleep and Wake-up Mode Test
1. Shift to the sleep mode:Turn the ignition switch to LOCK (0), and remove the key. If the MICU receives no signals from the inputs listed
below, it will go into sleep mode in less than 40 seconds.
Driver’s door lock switch (LOCK or UNLOCK)
Driver’s door key cylinder switch (LOCK or UNLOCK)
Front passenger’s door lock switch (LOCK or UNLOCK)
Trunk lid latch switch (Trunk lid closed)
Hazard warning switch (OFF)
2. Confirm the sleep mode: Measure the frequency on the B-CAN communication line (PNK wire); there should be 0 Hz when the system is in
the sleep mode. Check the parasitic draw at the battery while shifting into the sleep mode; the amperage should
change from about 200 mA to less than 35 mA.
3. Shift to the wake up mode: When the ignition switch is turned to ON (II), the MICU, gauge control module, immob ilizer-keyless control unit,
and ECM/PCM wake up at the same time without ‘‘talking’’ to each other through the communication lines. When
any switch in the multiplex integrated control system is turned on, it wakes up its related control unit which, in
turn, wakes up the other units. After confirming the sleep mode, look in the following table for the switch most
related to the problem. Operate that switch and see if its control unit wakes up.
NOTE: If any control unit is faulty and will not wake up, several circuits in the system will malfunction at the same
time. In the table below, the control unit is followed by a list of the switches and input signals that can wake it up.
Door switches (door open)
Driver’s door lock switch (LOCK or UNLOCK)
Driver’s door lock knob switch (LOCK or UNLOCK)
Driver’s door key cylinder switch (LOCK or UNLOCK)
Front passenger’s door lock switch (LOCK or UNLOCK)
Front passenger’s door lock knob switch (LOCK or UNLOCK)
Left rear door lock knob switch
Right rear door lock knob switch
Trunk lid latch switch (Trunk lid open)
Hood switch (with security) (hood open)
Hazard warning switch (ON)
Combination light switch (Parking, Headlight, Dimmer, Passing ON)
Ignition key switch (key inserted)
08/08/21 14:25:00 61SNR030_220_0101
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Security Alarm System
22-114Keyless/Power Door Locks/Security System
System Description
The security alarm system is armed automatically after the doors, hood, and trunk are closed and locked. For the
system to arm, the ignition switch must be to LOCK (0), the key must be removed from the ignition switch, and the
MICU must receive signals that the doors, hood, and trunk are closed and locked. The alarm can be disarmed at any
time by unlocking the driver’s door with the key or pressing the UNLOCK button on the transmitter.
When everything is closed and locked, the only i
nputs that are grounded, and have 0 V, are the driver’s door lock knob
switch (LOCK position), and the audio unit or navigation unit (if equipped). In other words, all of the other switches are
open, and have about 10 to 12 V, including the key cylinder switches. The security indicator in the gauge control
module (speedo) begins to flash immediately after the vehicle is completely closed and locked, and 15 seconds later,
the security system arms. If the security indicator does not flash, the system is not arming. A beep sounds and parking
lights flash to confirm the security alarm system is armed if the LOCK button is pressed a second time within
5 seconds.
If one of the switches is misadjusted or shorted internally, or there is a short in the circuit, the security system will not
arm. As long as the control unit continues to receive a ground signal (0 V), it senses that the vehicle is not closed and
locked, and the system will not arm. A switch that is slightly misadjusted can cause the alarm to sound for no apparent
reason. In this case, a significant change in outside air temperature, the vibration of a passing truck, or someone
bumping into the vehicle could cause the alarm to sound. There is no glass breakage or motion detector feature.
If anything is opened or improperly unlocked after the system is armed, the control unit receives a ground signal from
that switch, and the 10 to 12 V reference drops to 0 V. If the audio unit or navigation unit (if equipped) is disconnected,
the input loses its ground, and the input voltage goes to 10 to 12 V. The system sounds the alarm when any of these
occur:
 A door or the trunk is forced open.
 A door is unlocked without using the key or the transmitter.
 The hood is opened.
 The audio unit or navigation unit (if equipped) is disconnected.
 The transmitter PANIC button is pressed.
When the system sounds the alarm, the horn sounds and the exterior lights flash for 2 minutes. The alarm can be
stopped at any time by unlocking the driver’s door with the key or by pressing any button on the transmitter.
08/08/21 14:25:08 61SNR030_220_0116
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DYNOMITE -2009-

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DTC B1279:
YES
NO
When the passing switch is operated
When the headlight switch is turned ON, and the
dimmer switch changed from low beam to high
beam
YES
NO When the combination light switch is turned OFF
YES
NO
YES
NO
22-161
UNDER-DASH FUSE/RELAY BOX CONNECTOR S (20P)
DIMMER SW
(LT BLU)
H/L ON
SW (PNK)
PASSING
SW (RED)
Headlight Switch DIMMER
Position Circuit Malfunction
NOTE: If you are troubleshooting multiple DTCs, be
sure to follow the instructions in B-CAN System
Diagnosis Test Mode A (see page 22-93).
1. Clear the DTCs with the HDS.
2. Turn the ignition switch to LOCK (0) and then back to ON (II).
3. Turn the combination light (headlight) switch ON.
4. Change the dimmer switch from low beam to high beam.
5. Turn the combination light switch OFF, and then to the passing position, and wait for at least 6 seconds.
6. Check for DTCs with the HDS.
Go to step 7.
Intermittent failure, the system is OK at this
time. Check for loose or poor connections.
7. Select LIGHTING from the BODY ELECTRICAL system select menu, then enter DATA LIST.
8. Check each combination light switch position value with the DATA LIST menu.
Data List Value
Headlight Switch (PASSING) ON
Headlight Switch (High beam) OFF
Data List Value
Headlight Switch (PASSING) OFF
Headlight Switch (High beam) ON
Headlight Switch (HEADLIGHT) ON
Faulty MICU; replace the under-dash fuse/
relay box (see page 22-66).
Go to step 9. 9. Turn the ignition switch to LOCK (0).
10. Disconnect the combination light switch 12P connector.
11. Turn the ignition switch to ON (II).
12. Select LIGHTING from the BODY ELECTRICAL system select menu, then enter DATA LIST.
13. Check each combination light switch position value with the DATA LIST menu.
Data List Value
Headlight Switch (PASSING) OFF
Headlight Switch (High beam) OFF
Headlight Switch (HEADLIGHT) OFF
Go to step 17.
Go to step 14.
14. Turn the ignition switch to LOCK (0).
15. Disconnect under-dash fuse/relay box connector S (20P).
16. Check for continuity between body ground and under-dash fuse/relay box connector S (20P)
terminals No. 11, No. 12, and No. 16 individually.
Repair a short to ground in the wire.
Faulty MICU; replace the under-dash fuse/
relay box (see page 22-66).
(cont’d)
Wire side of female terminals
Is DTC B1279 indicated?
Are all data list values correct? Are all data list values indicated OFF?
Is there continuity?
08/08/22 16:38:06 61SNR030_220_0163
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