f-can ACURA CSX 2006 Service Workshop Manual


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DTC 86-31:
YES
NO
YES
NO Sign
YES
NO
VSA Modulator- control Unit 37P
Connector Terminal Gauge Control
Module (Tach) 36P
Connector Terminal
19-159
VSA MODULATOR-CONTROL UNIT 37P CONNECTOR
CAN-L (RED)CAN-L (RED)
CAN-H (WHT) CAN-H (WHT)
GAUGE CONTROL MODULE (TACH) 36P CONNECTOR
F-CAN Communication with
Gauge Control Module 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. 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 the gauge control module (tach) 36P
connector 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), then turn it to ON (II) again.
Go to step 6.
Do the gauge control module troubleshooting
(see page 22-241).
6. Turn the ignition switch to LOCK (0).
7. Disconnect the gauge control module (tach) 36P connector. 8. Disconnect the VSA modulator-control unit 37P
connector (see step 2 on page 19-171).
9. Check for continuity between the VSA modulator- control unit 37P connector terminal and gauge
control module (tach) 36P connector terminal (see
table).
CAN-L No. 1 No. 19
CAN-H No. 15 No. 1
Check for loose terminals in the gauge
control module (tach) 36P connector. If necessary,
substitute a known-good gauge control module
(tach), then go to step 1, and recheck. If no DTCs
are indicated, replace the original gauge control
module (tach) (see page 22-277). If DTC 86-31
resets, replace the VSA modulator-control unit
(see page 19-171).
Repair open in the wire between the gauge
control module (tach) and the VSA modulator-
control unit.
Wire side of female terminals
Wire side of female terminals
Is DTC 86-31 indicated?
Does t he gauge i nd i cat or s come on? Is there continuity?
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DTC 86-71:
YES
NO Sign
YES
NO
VSA Modulator- control Unit 37P
Connector Terminal Yaw Rate-lateral
Acceleration Sensor 5P ConnectorTerminal
19-160VSA System Components
DTC Troubleshooting (cont’d)
VSA MODULATOR-CONTROL UNIT 37P CONNECTOR
CAN-L (RED)
CAN-L (RED)
CAN-H (WHT) CAN-H (WHT)
YAW RATE-LATERAL ACCELERATION
SENSOR 5P CONNECTOR
F-CAN Communication with Yaw
Rate-Lateral Acceleration Sensor 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. 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
at the yaw rate-lateral acceleration sensor 5P
connector 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. Disconnect the yaw rate-lateral acceleration sensor 5P connector (see page 19-169).
7. Disconnect the VSA modulator-control unit 37P connector (see step 2 on page 19- 171).8. Check for continuity between the VSA modulator-
control unit 37P connector terminal and the yaw
rate-lateral acceleration sensor 5P connector
terminal (see table).
CAN-L No. 1 No. 4
CAN-H No. 15 No. 3
Go to step 9.
Repair open in the wire between the yaw rate-
lateral acceleration sensor and the VSA modulator-
control unit.
Wire side of female terminals
Wire side of female terminalsIs DTC 86-71 indicated?
Is there continuity?
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Troubleshooting CAN Circuit Related Problems
Using the HDS (Preferred method)
Without HDS (Use only if the HDS is unavailable)
22-74Multiplex Integrated Control System
General Troubleshooting Information
NOTE: Check the ECM/PCM for DTCs and troubleshoot ECM/PCM (see page 11-3) or F-CAN loss of communication
errors first.
1. Go to B-CAN System Diagnosis Test Mode A to check for ‘‘Connected units’’ and DTCs (see page 22-93).
2. If no DTCs are retrieved, go to B-CAN System Diagnosis Test Mode C (see page 22-95) or D (see page 22-96).
1. Check for communication circuit problems using B-CAN System Diagnostic Test (see page 22-97).
2. Check for DTCs.
3. Sort, and then troubleshoot the DTCs in the order. –1 Battery voltage DTCs
–2 Internal error DTCs
–3 Loss of communication DTCsNOTE: If the DTC B1000 is stored, troubleshoot DTC B 1000 first.
–4 Signal error DTCs
4. If no DTCs are retrieved, use B-CAN System Diagnostic Test Mode 2 to check all inputs related to failure (see step 10 on page 22-97).
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22-77
DTC Troubleshooting Index
NOTE: Check the ECM/PCM for DTCs and troubleshoot ECM/PCM (see page 11-3) or F-CAN loss of communication
errors first, then record all DTCs, and sort them by DTC type using the DTC troubleshooting index, then troubleshoot
the DTC(s) in this order.
 Battery voltage DTCs
 Internal error DTCs
 Loss of communication DTCs (beginning with the lowest number first; for example, if B1008 and B1011 are retrieved, troubleshoot B 1008 first).
 Signal error DTCs
B1000 Communication bus line error (BUS-OFF) Loss of communication(see page 22-102)
B1001 MICU internal error (CPU error) (’06-08 models) Internal error (see page 22-103)
B1002 MICU internal error ( EEPROM error) Internal error (see page 22-103)
B1008 MICU lost communication with gauge control m odule (A/T
message) Loss of
communication(see page 22-104)
B1011 MICU lost communication with gauge control m odule (VSP/NE
message) Loss of
communication(see page 22-104)
B1026 Front passenger’s door lock switch LOCK/UNLOCK signal error Signal error (see page 22-120)
B1032 MICU lost communication with the SRS unit (CDS message) CDS (Collision detection signal) input circuit malfunction (’06-07
models) Signal error (see page 22-105)
B1036 IG1 line input error Signal error (see page 22-105)
B1077 Windshield wiper (As) signal error Signal error (see page 22-224)
B1078 Daytime r unning lights signal error Signal error (see page 22-157)
B1127 Driver’s door key cylinder switch signal error Signal error (see page 22-121)
B1128 Driver’s door lock switch signal error Signal error (see page 22-123)
B1129 Driver’s door lock knob switch signal error Signal error (see page 22-124)
B1275 Combination light switch OFF position circuit malfunction (’07- 09 models) Signal error (see page 22-159)
B1276 Combination light switch parking (SMALL) position circuit malfunction (’07-09 models) Signal error (see page 22-159)
B1278 Headlight switch ON position circuit malfunction (’07-09 models) Signal error (see page 22-159)
B1279 Headlight switch DIMMER position circuit malfunction (’07-09 models) Signal error (see page 22-161)
B1280 Turn signal switch circuit malfunction (’07-09 models) Signal error (see page 22-186)
B1281 Windshield wiper switch MIST position circuit malfunction (’07- 09 models) Signal error (see page 22-226)
B1282 Windshield wiper switch INT position circuit malfunction (’07-09 models) Signal error (see page 22-226)
B1283 Windshield wiper switch LOW position circuit malfunction (’07- 09 models) Signal error (see page 22-226)
B1284 Windshield wiper switch HIGH position circuit malfunction (’07- 09 models) Signal error (see page 22-226)
(cont’d)
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Gauge Control ModuleDTC Description DTC typePage
22-78Multiplex Integrated Control System
DTC Troubleshooting Index (cont’d)
B1150 Communication bus line error (BUS-OFF)
Loss of
communication (see page 22-106)
B1152 Gauge control m odule internal error (EEPROM error) Internal error (see page 22-262)
B1155 Gauge control m odule lost communication with the MICU
(Headlight switch message) Loss of
communication(see page 22-263)
B1156 Gauge control m odule lost communication with the MICU
(Wiper switch message) Loss of
communication(see page 22-263)
B1157 Gauge control m odule lost communication with the MICU
(MICU message) Loss of
communication(see page 22-264)
B1159 Gauge control m odule lost communication with the MICU
(DOORSW message) Loss of
communication(see page 22-263)
B1160 Gauge control m odule lost communication with the MICU
(DRLOCKSW message) Loss of
communication(see page 22-264)
B1168 Gauge control m odule lost communication with the ECM/PCM
(Engine messages) Loss of
communication(see page 22-265)
B1169 Gauge control m odule lost communication with the PCM (A/T
message) Loss of
communication(see page 22-265)
B1170 Gauge control m odule lost communication with ABS/VSA
modulator-control unit (ABS/VSA message) Loss of
communication(see page 22-265)
B1173 Gauge control m odule lost communication with the TPMS
control unit (TMPS message) (’08-09 models) Loss of
communication(see page 22-266)
B1175 Fuel level sensor (Fuel gauge sending unit) circuit open Signal error (see page 22-267)
B1176 Fuel level sensor (Fuel gauge sending unit) circuit short Signal error (see page 22-268)
B1177 Battery voltage a bnormal (’06 model) Battery voltage (see page 22-269)
B1178 F-CAN communication line error Loss of
communication (see page 22-265)
B1183 Gauge control m odule lost communication with EPS control unit
(EPS message) Loss of
communication(see page 22-270)
B1187 Gauge control m odule lost communication with the SRS unit
(SRS message) Loss of
communication(see page 22-265)
B1188 Gauge control m odule lost communication with the MICU (RM
message) Loss of
communication(see page 22-263)
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Body Controller Area Network (B-CAN) and Fast Controller Area Network (F-CAN)
22-80 Multiplex Integrated Control System
System Description
GAUGE CONTROL MODULE (TACH)
CAN H CAN L
MICU
ECM/PCM
(F-CAN)
(B-CAN)UNDER-DASH FUSE/RELAY BOX
DATA LINK CONNECTOR
SRS UNIT
ABS MODULATOR-CONTROL UNIT*1
VSA MODULATOR-CONTROL UNIT*2
YAW RATE-LATERAL
ACCELERATION SENSOR*2
EPS CONTROL UNIT
TPMS CONTROL UNIT*3






 F-CAN
TRANSCEIVER
B-CAN
TRANSCEIVER
IMMOBILIZER-
KEYLESS CONTROL
UNITCLIMATE
CONTROL
UNIT
HANDSFREELINK
CONTROL UNIT*4
*1: ’06 07 Touring and Premium models
*2: ’07 TYPE S and ’08 09 models
*3: ’08 09 models
*4: ’09 model with navigation system
The body controller area network (B-CAN) and the fast controller area network (F-CAN) share information between
multiple electronic control units (ECUs). B-CAN communication moves at a slower speed (33.33 kbps) for convenience
related items and for other functions. F-CAN information moves at a faster speed (500 kbps) for ‘‘real time’’ functions
such as fuel and emissions data. To allow both systems to share information, the gauge control module translates
information from B-CAN to F-CAN and from F-CAN to B-CAN.
 The single wire method is used between the units not requiring the communication to move at a fast speed.
 Using a single wire method reduces the number of the wires used on the body controller area network.
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Gateway Function
Network ‘‘Loss of Communication’’ Error Checking Function
Except TYPE S Error Code List
Error code Type of communication line(s) error
TYPE S Error Code List Error code Type of communication line(s) error
22-81
(GATE WAY)CPU BAT
GND
FCAN BCAN
RTH
CAN H
5V
5V
CAN L
CAN H
CAN L
CAN H
Example: Error 1
The gauge control module acts as a gateway to allow both systems to share information, the gauge control module
translates information from B-CAN to F-CAN and from F-CAN to B-CAN.
The ECUs on the CAN circuit send messages to each other. If there is any malfunction on the network, the odo/trip
display on the gauge control module can indicate the error messages by entering the gauge self-diagnostic function
(see page 22-241).
 Error 1: There is a malfunction in the communication line between the gauge control module (tach) and the F-CAN.
 Error 2: There is a malfunction in the communication line between the gauge control module (tach) and the B-CAN.
 Error 3: There is a malfunction in the communication line between the gauge control module (tach) and the gauge control module (speedo) (UART line).
Error 1 F-CAN communication
Error 2 B-CAN communication
Error 3 UART communication
Error 12 F-CAN and B-CAN communication
Error 13 F-CAN and UART communication
Error 23 B-CAN and UART communication
Error 123 F-CAN, B-CAN and UART communication
Error 1 F-CAN communication
Error 2 B-CAN communication
Error 12 F-CAN and B-CAN communication
(cont’d)
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Self-diagnostic Function
22-83
GAUGE CONTROL MODULE
CAN H CAN L B-CAN
B-CAN (33.33 kbps)
F-CAN (500 kbps)
SRS UNIT MICU
ECM/PCM
ABS MODULATOR-
CONTROL UNIT* IMMOBILIZER-
KEYLESS
CONTROL UNIT
K-LINE
DATA LINK
CONNECTOR HDS CLIMATE CONTROL
UNIT
TMPS CONTROL
UNIT* EPS CONTROL
UNIT
NAVIGATION
UNIT
VSA MODULATOR-
CONTROL UNIT*
HANDSFREELINK
CONTROL UNIT*
AUDIO UNIT
YAWRATE-LATERAL
ACCELERATION
SENSOR*
*1: ’06-08 Touring and Premium models
*2: ’07 TYPES and ’08-09 models
*3: ’08-09 models
*4: ’09 model with navigation system
1
3 2
4
2
By connecting the HDS to the data link connector (DLC), the HDS can retrieve the diagnostic results from the MICU via
a diagnostic line called K-LINE. The K-LINE is distinguished from the CAN line, and connected to the CAN related ECUs.
The MICU is a gateway between the HDS and B-CAN related ECUs, and sends B-CAN diagnostic results to the HDS.
When doing a function test with the HDS, the HDS sends an output signal through the K-LINE to the MICU. The MICU
either relays the request to another ECU, or commands the function its self.
(cont’d)
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YES
NO
YES
NO
22-93
Troubleshooting - B-CAN System Diagnosis Test Mode A
A
Check the ECM/PCM for DTCs and troubleshoot ECM/
PCM (see page 11-3) or F-CAN loss of communication
errors first, then do this diagnosis if the symptom is
relatedtotheB-CANsystem.
NOTE: If the HDS is not available, do the Test Mode 1 and Test Mode 2 (see page 22-97).
 Always cycle the ignition switch within 3 seconds when prompted in the DTC troubleshooting
procedures.
1. Compare the symptom with this list of B-CAN related systems:
 Gauge control module
 Exterior lights
 Turn signals
 Entry light control
 Interior lights
 Door-open and trunk-open indicators
 Horns (security and panic)
 Chimes (key-in, seat belt, lights-on, and parking brake)
 Power window/moonroof timer
 Wiper/washer
Security
 Keyless entry
 Power door locks
Keyinterlock
 Dash light brightness control
Go to step 2.
Go to the system troubleshooting for the
system with the symptom. 2. Connect the HDS to the data link connector (A),
then turn the ignition switch to ON (II).
3. From the BODY ELECTRICAL menu, select UNIT INFORMATION, and then select CONNECTED UNIT
listed to see if the following control units are
communicating with the HDS.
MICU
 Gauge control module
 Immobilizer-keyless control unit
 Climate control unit
 HandsFreeLink control unit
NOTE:  If one or more of the units are not communicating with the HDS, DETECT will be
displayed.
 If the unit is not communicating or the vehicle is not equipped, ‘‘Not Available’’ will be displayed.
Go to step 4.
If any of the control units are not
communicating, go to B-CAN System Diagnosis
Test Mode B (see page 22-94). If all units are not
communicating or only the MICU is communicating,
go to DTC B1000 troubleshooting (see page 22-102).
(cont’d)
Is the symptom related to the B-CAN system? Ar e al l cont r ol uni t s communi cat i ng w i t h t he H DS?
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Special Tools Required
YES
NO YES
NO
Test Mode 1
Test Mode 2
22-97
Troubleshooting - B-CAN System Diagnosis Test Mode 1 and Test Mode 2
(without the HDS)
A
(07WAZ-001010A)B
MPCS (MCIC) service connector 07WAZ-001010A
Check the ECM/PCM for DTCs and troubleshoot ECM/
PCM (see page 11-3) or F-CAN loss of communication
errors first, then do this diagnosis if the HDS is not
available.
1. Check the No. 23 (10 A) fuse in the under-hood fuse/relay box and No. 10 (7.5 A) fuse in the under-
dash fuse/relay box.
Go to step 2.
Find and repair the cause of the blown fuse.
2. Remove the left kick panel (see page 20-66).
3. Turn the ignition switch to ON (II), and move the ceiling light switch to the middle ( door) position.
4. Connect the MPCS service connector (A) to the MCIC socket (B) in the under-dash fuse/relay box.
5. Wait 5 seconds, and watch the ce iling light. When
the ceiling light flashes quickly once, and then goes
off the system is in Test Mode 1. 6. Check for B-CAN DTCs indicated by the gauge
control module (tach) odometer/trip meter display
while still in Test Mode 1. Push the SEL/RESET
switch button to display the next code. After you
get to the last code, the display shows END. If no
DTCs are stored, the display will read NO.
Go to step 7.
Go to step 10.
7. Record all DTCs and sort them.
8. Troubleshoot the DTCs in this order:  Battery voltage DTCs
 Internal error DTCs
 Loss of communication DTCs (begin with thelowest number first; for example, if B1008 and
B1011 are retrieved, troubleshoot B 1008 first)
 Signal error DTCs
9. Clear the DTCs by pressing and holding the SEL/ RESET switch button for about 10 seconds. You will
hear a beep to confirm the codes have been cleared.
Operate the devices that failed, and recheck for
codes.
10. Remove the MPCS service connector from the under-dash fuse/relay box socket for
5 10 seconds, then re-insert it to enter Mode 2.
When the system enters Mode 2, the ceiling light
will flash two times quickly and then go off.
NOTE: If the MPCS service connector is
disconnected for too short or too long of a time, or
the ignition switch is turned to LOCK (0), the
system will return to Test Mode 1.
11. The following tables list the circuits that can be checked in Test Mode 2. Operate the switch that is
most closely related to the problem. If the circuit is
OK, the ceiling light will blink once. If the circuit is
faulty, there will be no indication.
(cont’d)
Ar e t he f uses OK ? Are any DTCs indicated?
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