f-can ACURA CSX 2006 Service Service Manual


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DTC 86-24:
DTC 86-25:
YES
NO Sign ECM/PCM
Connector A
(44P) Terminal
YES
NO
ABS Modulator-
control Unit 25P
Connector Terminal
19-86 ABS Components
DTC Troubleshooting (cont’d)
CAN-H (WHT)
CAN-L (RED)
ECM/PCM CONNECTOR A (44P) CAN-L (RED)
CAN-H (WHT) ABS MODULATOR-CONTROL UNIT 25P CONNECTOR
F-CAN Communication with
Engine Malfunction
F-CAN Communication with
Engine Malfunction
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Test-drive the vehicle at 10 km/h (7 mph) or more.
NOTE: Drive the vehicle on the road, not on a lift.
4. Check for DTCs with the HDS.
Go to step 5.
Intermittent failure, the system is OK at this
time. Check for loose terminals between ECM/PCM
connector A (44P) and the ABS modulator-control
unit 25P connector. Refer to intermittent failures
troubleshooting (see page 19-50).
5. Turn the ignition switch to LOCK (0).
6. Short the SCS line with the HDS.
7. Disconnect ECM/PCM connector A (44P).
8. Disconnect the ABS modulator-control unit 25P connector (see step 2 on page 19-90). 9. Check for continuity between ABS modulator-
control unit 25P connector terminal and ECM/PCM
connector A (44P) terminal (see table).
CAN-L No. 17 No. 37
CAN-H No. 1 No. 36
Go to step 10.
Repair open in the wire between the ECM/
PCM and the ABS modulator-control unit.
Wire side of female terminals
Terminal side of female terminals
Is DT C 86-24 and/ or 86-25 indicated? Is there continuity?
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YES
NO YES
NO
DTC 86-FF:
19-8719-87
10. Reconnect all connectors.
11. 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).
12. Clear the DTC with the HDS.
13. Test-drive the vehicle at 10 km/h (7 mph) or more.
NOTE: Drive the vehicle on the road, not on a lift.
14. Check for DTCs with the HDS.
Replace the ABS modulator-control unit
(see page 19-90).
If the ECM/PCM was updated, troubleshooting
is complete. If the ECM/PCM was substituted,
replace the original ECM/PCM (see page 11-228). 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. Check for DTCs with the HDS.
Replace the ABS modulator-control unit
(see page 19-90).
Intermittent failure, the system is OK at this
time.F-CAN Communication with ABS
Malfunction
Is DT C 86-24 and/ or 86-25 indicated? Is DTC 86-FF indicated?
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Diagnostic Trouble Code (DTC)
Self-diagnosis
Kickback
Pump Motor
Brake Fluid Replacement/Air BleedingHow to Troubleshoot DTCs
Intermittent Failures
19-98
VSA System Components
General Troubleshooting Information (cont’d)
 The memory holds all DTCs. However, when the
same DTC is detected more than once, the more
recent DTC is written over the earlier one. Therefore,
when the same problem is detected repeatedly, it is
memorized as a single DTC.
 The DTCs are indicated in the order they occur.
 The DTCs are memorized in the EEPROM. Therefore, the memorized DTCs cannot be erased by
disconnecting the battery. Do the specified
procedures to clear the DTCs.
 Self-diagnosis can be classified into two categories: – Initial diagnosis: Done right after the ignition switch is turned to ON (II) and until the ABS and VSA
indicators go off.
– Regular diagnosis: Done right after the initial diagnosis until the ignition switch is turned to
LOCK (0).
 When the system detects a problem, the VSA modulator-control unit shifts to fail-safe mode.
The pump motor operates when the VSA modulator-
control unit is functioning, and the fluid in the reservoir
is forced out to the master cylinder, causing kickback at
the brake pedal.  The pump motor operates when the VSA modulator- control unit is functioning.
 The VSA modulator-control unit checks the pump motor operation one time after completing initial
diagnosis during regular diagnosis when the vehicle
is driven over 15 km/h (10 mph).
Brake fluid replacement and air bleeding procedures
are identical to the procedures used on vehicles without
the VSA system (see page 19-9). The troubleshooting procedures assume that the cause
of the problem is still present, and the ABS and/or VSA
indicator is still on. Following a troubleshooting
procedure for a code that has been cleared but does not
reset can result in incorrect diagnosis.
1. Question the client about the conditions when the problem occurred, and try to reproduce the same
conditions for troubleshooting. Find out when the
ABS and/or VSA indicator came on, such as during
activation, after activation, when the vehicle was
traveling at a certain speed, etc. If necessary, have
the client demonstrate the concern.
2. When the ABS or VSA indicator does not come on during the test-drive, check for loose connectors,
poor contact of the terminals, etc. in the circuit
indicated by the DTC before you start
troubleshooting.
3. After troubleshooting, or the repairs are done, clear the DTCs, and test-drive the vehicle under the same
conditions that originally set the DTCs. Make sure
the ABS and VSA indicators do not come on.
4. Check for DTCs from other systems which are connected via F-CAN. If there are DTCs that are
related to F-CAN, one possible cause was that the
ignition switch was turned to ON (II) with the VSA
modulator-control unit connector disconnected.
Clear the DTCs. Check for fuel and emissions DTC’s
first.
NOTE: Always troubleshoot fuel and emissions
DTC’s first.
The term ‘‘intermittent failure’’ means a system may
have had a failure, but it checks OK now. If you cannot
reproduce the condition, check for loose connectors or
terminal pins related to the circuit that you are
troubleshooting.
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DTCDetection Item ABS
Indicator Brake
System
Indicator VSA
Indicator VSA
Activation Indicator Note
19-104VSA System Components
DTC Troubleshooting Index (cont’d)
81 -31
ON ON ON ON (see page 19-153)
-32 ON ON ON ON (see page 19-153)
-33 ON ON ON ON (see page 19-153)
-35 ON ON ON ON (see page 19-153)
-36 ON ON ON ON (see page 19-153)
-37 ON ON ON ON (see page 19-153)
-38 ON ON ON ON (see page 19-153)
-39 ON ON ON ON (see page 19-153)
-3A ON ON ON ON (see page 19-153)
-3C ON ON ON ON (see page 19-153)
-3D ON ON ON ON (see page 19-155)
-3E ON ON ON ON (see page 19-155)
-40 ON ON ON ON (see page 19-153)
-41 ON ON ON ON (see page 19-153)
-42 ON ON ON ON (see page 19-153)
-51 ON ON ON ON (see page 19-154)
-52 ON ON ON ON (see page 19-153)
-53 ON ON ON ON (see page 19-154)
-54 ON ON ON ON (see page 19-153)
-55 ON ON ON ON (see page 19-154)
-56 ON ON ON ON (see page 19-153)
-57 ON ON ON ON (see page 19-154)
-58 ON ON ON ON (see page 19-153)
-59 ON ON ON ON (see page 19-155)
-61 ON ON ON ON (see page 19-153)
-71 ON OFF ON ON (see page 19-153)
-80 ON ON ON ON (see page 19-153)
83 -13 ECM/PCM Communication Error OFF OFF ON ON (see page 19-155)
-14 ECM/PCM Communication Error OFF OFF ON ON (see page 19-155)
84 -21 VSA Sensor Neutral Position Not Writing OFF OFF ON ON (see page 19-156)
86 -01 F-CAN Bus-off Malfunction OFF OFF ON ON (see page 19-156)
-11 F-CAN Communication with ECM/PCM Malfunction OFF OFF ON ON (see page 19-157)
-21 F-CAN Communication with Engine Malfunction OFF OFF ON ON (see page 19-157)
-22 F-CAN Communication with Engine Malfunction OFF OFF ON ON (see page 19-157)
-23 F-CAN Communication with Engine Malfunction OFF OFF ON ON (see page 19-157)
-24 F-CAN Communication with Engine Malfunction OFF OFF ON ON (see page 19-157)
-25 F-CAN Communication with Engine Malfunction OFF OFF ON ON (see page 19-157)
-31 F-CAN Communication with Gauge Control Module Malfunction OFF OFF ON ON (see page 19-159)
F-CAN Communication with EAT Malfunction OFF OFF ON ON (see page 19-157)
-71 F-CAN Communication with Yaw Rate-Lateral Acceleration Sensor Malfunction OFF OFF ON ON (see page 19-160)
107 -22 Central Processing Unit (CPU) Internal Circuit Malfunction OFF OFF OFF ON (see page 19-162)
108 -21 Steering Angle Sensor Malfunction OFF OFF OFF ON (see page 19-162)
112 -01 Central Processing Unit (CPU) Internal Circuit Malfunction ON ON ON ON (see page 19-163)
121 -01 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
-02 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
-11 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
-21 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
-24 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
122 -01 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
-21 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
-22 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
-23 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
123 -01 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
-02 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
-11 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
-21 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
-24 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
124 -01 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
-21 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
-22 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
-23 VSA Solenoid Valve Malfunction ON ON ON ON (see page 19-164)
4: A/TCentral Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
-414
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Symptom Diagnostic procedure
19-105
Symptom Troubleshooting Index
When the vehicle has one of these symptoms, check for VSA diagnostic trouble codes (DTCs) with the HDS. If there
are no DTCs, do the diagnostic procedure for the symptom, in the sequence listed, until you find the cause.
HDS does not communicate with the VSA modulator-
control unit or the vehicle Troubleshoot the DLC circuit (see page 11-204).
VSA activation indicator does not come on at start-up
(bulb check) 1.
2.Do the gauge control module troubleshooting
(see page 22-241).
Substitute a known-good VSA modulator-control unit,
then recheck. If it is OK, replace the original VSA
modulator-control unit (see page 19-171).
VSA activation indicator does not go off, and no DTCs
are stored 1.
2.Symptom Troubleshooting (see page 19-165).
Substitute a known-good VSA modulator-control unit,
then recheck. If it is OK, replace the original VSA
modulator-control unit (see page 19-171).
ABS indicator, brake system indicator, and VSA
indicator do not come on 1.
2.Do the gauge control module troubleshooting
(see page 22-241).
Substitute a known-good VSA modulator-control unit,
then recheck. If it is OK, replace the original VSA
modulator-control unit (see page 19-171).
ABS indicator, brake system indicator, and VSA
indicator do not go off 1.
2.
3.Check for F-CAN DTCs, and troubleshoot and repair
those first.
Do the gauge control module troubleshooting
(see page 22-241).
Symptom Troubleshooting (see page 19-166).
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VSA Modulator-Control Unit Inputs and Outputs for 37P Connector (Connector Disconnected)
TerminalnumberWire color Terminal sign Description Signal
19-106VSA System Components
System Description
NOTE: Standard battery voltage is about 12 V.
1 RED CAN-L F-CAN communication circuit
3 BLU STR-D Detects steering angle sensor signal
6 PNK FR-GND Detects right-front wheel speed sensor signal
7 ORN SVCC Power source for the steering angle sensor With ignition switch ON (II): about 5.0 V
8 PUR RL-GND Detects left-rear wheel speed sensor signal
9 LT GRN RR B Detects right-rear wheel speed sensor signal
10 BRN SGND Ground for the steering angle sensor
11 RED FL-GND Detects left-front wheel speed sensor signal
13 WHT FSR B Power source for the fail-safe relay Battery voltage at all times
14 RED MR B Power source for the motor relay Battery voltage at all times
Wire side of female terminals
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TerminalnumberWire color Terminal sign Description Signal
19-107
NOTE: Standard battery voltage is about 12 V.
15 WHT CAN-H F-CAN communication circuit
17 PUR STR-B Detects steering angle sensor signal
19 GRN FR B Detects right-front wheel speed sensor signal
20 YEL RL B Detects left-rear wheel speed sensor signal
21 BLU RR-GND Detects right-rear wheel speed sensor signal
22 WHT FL B Detects left-front wheel speed sensor signal
26 LT BLU K-LINE Communication with HDS
28 GRY IG1 Power source for activating the system With ignition switch ON (II): about battery
voltage
34 GRN STR-A Detects steering angle sensor signal
36 BLK GND Ground for the VSA modulator- control unit Continuity to ground
37 BLK MR-GND Ground for the pump motor Continuity to ground
(cont’d)
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Î
System Outline
19-108VSA System Components
System Description (cont’d)
CONTROL UNIT
MODULATOR UNIT VSA MODULATOR-
CONTROL UNIT
Brake pressure
signal
 Solenoid control
 Motor control
Communication via F-CAN
VSA
OFF
SWITCH
PARKING
BRAKE
SWITCH BRAKE
FLUID
LEVEL
SWITCH
WHEEL SPEED SENSOR
 Engine torque control request
 Control mode signal
 VSA control enable/disable
 Throttle open angle signal
 Engine revolution signal
 Brake pedal
position switch signal
 Service check signal
 Gear position signal
Wheel rotation
pulse signal
ECM/PCM
BRAKE
PEDAL
POSITION
SWITCH
GAUGE CONTROL MODULE (TACH)
YAW RATE-LATERAL
ACCELERATION
SENSORSTEERING ANGLE
SENSOR
VSAOFFswitchsignal
 Parking brake switch signal
 Brake fluid level switch signal
 Yaw rate signal
 Lateral acceleration signal Steering angle signal
 Indicator drive signal
 Buzzer request signal*
*: ’09 model
This system is composed of the VSA modulator-control unit, the wheel speed sensors, the steering angle sensor, the
yaw rate-lateral acceleration sensor, and the system indicators in the gauge control module (tach). The VSA
modulator-control unit controls the ABS, EBD, TCS, VSA, and brake assist with the brake pressure of each wheel and
reduces engine torque.
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DTC 84-21: DTC 86-01:
YES
NO YES
NO
19-15619-156VSA System Components
DTC Troubleshooting (cont’d)
VSA Sensor Neutral Position not
Writing F-CAN Bus-off Malfunction
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Do the VSA sensor neutral position memorization
(see page 19-169).
4. Turn the ignition switch to LOCK (0), then turn it to ON (II) again.
5. Check for DTCs with the HDS.
Check for loose terminals in the VSA
modulator-control unit 37P connector. If necessary,
substitute a known-good VSA modulator-control
unit (see page 19-171), and retest.
The system is OK at this time. 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. Check for DTCs with the HDS.
Go to step 5.
Intermittent failure, the system is OK at this
time. Check for loose terminals between ECM/PCM
connector A (44P) and the VSA modulator-control
unit 37P connector. Refer to intermittent failures
troubleshooting (see page 19-98).
5. Turn the ignition switch to LOCK (0).
6. Short the SCS line with the HDS.
7. Disconnect ECM/PCM connector A (44P).
8. Disconnect the VSA modulator-control unit 37P connector (see step 2 on page 19-171).
Is DTC 84-21 indicated? Is DTC 86-01 indicated?
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Sign ECM/PCM
Connector A
(44P) Terminal
YES
NO YES
NO
VSA Modulator-
control Unit 37P
Connector Terminal
DTC 86-11:
DTC 86-21:
DTC 86-22:
DTC 86-23:
DTC 86-24:
DTC 86-25:
DTC 86-41:
19-15719-157
VSA MODULATOR-CONTROL UNIT 37P CONNECTOR
CAN-L (RED)
CAN-H
(WHT) CAN-L (RED)
CAN-H (WHT)
ECM/PCM CONNECTOR A (44P)
9. Check for continuity between the VSA modulator-control unit 37P connector terminal and ECM/PCM
connector A (44P) terminal (see table).
CAN-L No. 1 No. 37
CAN-H No. 15 No. 36
Check for loose terminals in the VSA
modulator-control unit 37P connector. If necessary,
substitute a known-good VSA modulator-control
unit (see page 19-171), and retest.
Repair open in the wire between the ECM/
PCM and the VSA modulator-control unit. 1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Test-drive the vehicle at 10 km/h (7 mph) or more.
NOTE: Drive the vehicle on the road, not on a lift.
4. Check for DTCs with the HDS.
If DTC 86-01 is indicated at the same time, do
the DTC 86-01 troubleshooting first (see page
19-156). If DTC 86-01 is not indicated, go to step 5.
If any other DTCs are indicated, go to the
indicated DTCs troubleshooting. If DTCs are not
indicated, there was an intermittent failure, the
system is OK at this time. Check for loose terminals
between ECM/PCM connector A (44P) and the VSA
modulator-control unit 37P connector. Refer to
intermittent failures troubleshooting (see page
19-98).
(cont’d)F-CAN Communication with
ECM/PCM Malfunction
F-CAN Communication with
Engine Malfunction
F-CAN Communication with
Engine Malfunction
F-CAN Communication with
Engine Malfunction
F-CAN Communication with
Engine Malfunction
F-CAN Communication with
Engine Malfunction
F-CAN Communication with
EAT Malfunction
Wire side of female terminals
Terminal side of female terminals
Is there continuity? Is DT C 86-11, 86-21, 86-22, 86-23, 86-24, 86-25,and / or 86-41 i nd i cat ed ?
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