2006 ACURA CSX climate control

(#')
µ
µ
µ
µ
YES
NO
YES
NOUnit not communicating
22-9422-94Multiplex Integrated Control System
Troubleshooting - B-CAN System
Diagnosis Test Mode A (cont’d)
Troubleshooting - B-CAN System
Diagnosis Test Mode B
4. Select the system that has the problem from the
BODY ELECTRICAL menu, then select DTCs.
Go to step 5.
If the problem is related to one of the
following items, go to B-CAN System Diagnosis
Test Mode C (see page 22-95) if the system does
not stop or turn off. Go to Test Mode D (see page
22-96) if the system does not run or turn on.
 Exterior lights
 Turn signals
 Entry light control
 Interior lights
 Horn (security and panic)
 Wiper/washer
If the problem is related to one of the following
items, go to the troubleshooting for that individual
system.  Gauge control module
 Door-open and trunk-open indicators
 Chimes (key-in, seat belt, lights-on, and parking brake)
Security
 Keyless entry
Keyinterlock
 Dash light brightness control
 Audio system
 Navigation (if equipped)
 HandsFreeLink (if equipped)
5. Record all DTCs, and sort them by DTC type.
6. Troubleshoot the DTC(s) in this order:  Battery voltage DTCs.
 Internal error DTCs.
 Loss of communication DTCs. Begintroubleshooting with the lowest number first
(Example: if DTC B1008 and B1011 are retrieved,
begin by troubleshooting B 1008).
 Signal error DTCs. Do this diagnosis if any of the control units are not
communicating (Not Available is displayed in the HDS)
as found by the B-CAN System Diagnosis Test Mode A
(see page 22-93).
1. Using the HDS, select the system that has the symptom from the BODY ELECTRICAL menu.
2. Select DTCs, and then check for loss of communication DTCs.
Go to step 3.
Replace the MICU.
3. Do the input test for the unit not communicating with the HDS.
MICU (see page 22-109)
Gauge control module (see page 22- 271)
Immobilizer-keyless control unit (see page
22-330)
Climate control unit (see page 21-24)
HandsFreeLink control unit (see page 23-388)
Are any DTCs indicated?
Ar e any l oss of communi cat i on DT Cs i nd i cat ed ?
08/08/21 14:24:59 61SNR030_220_0096
ProCarManuals.com
DYNOMITE -2009-

(#')
µ
µ
µ
µ
YES
NO
YES
NOUnit not communicating
22-9422-94Multiplex Integrated Control System
Troubleshooting - B-CAN System
Diagnosis Test Mode A (cont’d)
Troubleshooting - B-CAN System
Diagnosis Test Mode B
4. Select the system that has the problem from the
BODY ELECTRICAL menu, then select DTCs.
Go to step 5.
If the problem is related to one of the
following items, go to B-CAN System Diagnosis
Test Mode C (see page 22-95) if the system does
not stop or turn off. Go to Test Mode D (see page
22-96) if the system does not run or turn on.
 Exterior lights
 Turn signals
 Entry light control
 Interior lights
 Horn (security and panic)
 Wiper/washer
If the problem is related to one of the following
items, go to the troubleshooting for that individual
system.  Gauge control module
 Door-open and trunk-open indicators
 Chimes (key-in, seat belt, lights-on, and parking brake)
Security
 Keyless entry
Keyinterlock
 Dash light brightness control
 Audio system
 Navigation (if equipped)
 HandsFreeLink (if equipped)
5. Record all DTCs, and sort them by DTC type.
6. Troubleshoot the DTC(s) in this order:  Battery voltage DTCs.
 Internal error DTCs.
 Loss of communication DTCs. Begintroubleshooting with the lowest number first
(Example: if DTC B1008 and B1011 are retrieved,
begin by troubleshooting B 1008).
 Signal error DTCs. Do this diagnosis if any of the control units are not
communicating (Not Available is displayed in the HDS)
as found by the B-CAN System Diagnosis Test Mode A
(see page 22-93).
1. Using the HDS, select the system that has the symptom from the BODY ELECTRICAL menu.
2. Select DTCs, and then check for loss of communication DTCs.
Go to step 3.
Replace the MICU.
3. Do the input test for the unit not communicating with the HDS.
MICU (see page 22-109)
Gauge control module (see page 22- 271)
Immobilizer-keyless control unit (see page
22-330)
Climate control unit (see page 21-24)
HandsFreeLink control unit (see page 23-388)
Are any DTCs indicated?
Ar e any l oss of communi cat i on DT Cs i nd i cat ed ?
08/08/21 14:24:59 61SNR030_220_0096
ProCarManuals.com
DYNOMITE -2009-

Î
µµ
µ
22-101







 124
19
1
RED
WHT CAN L
F-CAN TRANSCEIVER
CAN H
LT GRN
3
G504BLK
5
32
PNK
(B-CAN) (B-CAN) BRN/YELBRNLG
G101 BLK
7 2
IG1
YEL
VBU
B-CAN 1
4
PNK
16
BLK
G504 WHT
21
PNK GAUGE CONTROL MODULE (TACH)
BRN
WHT
17
18
MAIN CIRCUIT
B-CAN
TRANSCEIVER LCD DISPLAY
(DTC CODE DISPLAY)
IMMOBILIZER-KEYLESS
CONTROL UNIT
CLIMATE
CONTROL UNIT
No. 36 (10 A) FUSE
(UNDER-DASH
FUSE/RELAY BOX)
ABS MODULATOR-CONTROL UNIT*1
VSA MODURATOR-CONTROL UNIT*2
YAW RATE-LATERAL ACCELERATION
SENSOR*2
DATA LINK CONNECTOR
SRS UNIT
ECM/PCM
TPMS CONTROL UNIT*3
EPS CONTROL UNIT
WHT
: CAN line
No. 2 (15 A) FUSE
(UNDER-DASH
FUSE/RELAY BOX)
: Other communication line
*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
*5: With navigation system
*6: Without navigation system
BLK*2
PNK
PNK
08/08/21 14:25:01 61SNR030_220_0103
ProCarManuals.com
DYNOMITE -2009-

(#' .
)

µ
µ
µ
µ µ
µ
DTC B1000:
YES
NO
YES
NO Control Unit Connector
YES
NO Control Unit Appropriate Connector
22-102Multiplex Integrated Control System
DTC Troubleshooting
Communication Bus Line Error
(BUS-OFF)
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. Wait for at least 6 seconds.
4. Check for DTCs with the HDS.
Go to step 5.
Intermittent failure, the communication bus
line is OK at this time. Check for loose or poor
connections, or worn/shorted wires. If the
connections are good, check the battery condition
(see page 22-67) and the charging system.
5. Check for DTCs with the HDS.
Go to step 6.
Faulty MICU; replace the under-dash fuse/
relay box (see page 22-66). 6. Turn the ignition switch to LOCK (0).
7. Disconnect the appropriate connector at each
control unit in the table one at a time. Clear the
DTCs, then recheck for DTCs after each unit is
disconnected.
Gauge control
module (tach) 36P connector
Immobilizer-keyless
control unit 7P connector
Climate control unit 32P connector
HandsFreeLink
control unit 28P connector
Go to step 8.
Check the power and grounds to the control
unit that was disconnected when B1000 did not
reset. If OK, replace the control unit.
8. Disconnect all of the appropriate connectors for each of the units in the table.
Gauge control
module (tach) 36P connector
Immobilizer-keyless
control unit 7P connector
Climate control unit 32P connector
HandsFreeLink
control unit 28P connector
Is DTC B1000 indicated?
Ar e DT Cs B1008, B1011, and B1032 al soindicated? Is DT C B1000 indicated with each individual unit
d i sconnect ed ?
08/08/21 14:25:01 61SNR030_220_0104
ProCarManuals.com
DYNOMITE -2009-

(#' 

.
)(#' .
)
µ
µ µ
µ
DTC B1200: DTC B1750:
YES
NO YES
NO
22-10722-107
Communication Bus Line Error
(Bus OFF) Communication Bus Line Error
(Bus OFF)
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. Wait for at least 6 seconds.
4. Check for DTCs with the HDS.
Troubleshoot DTC B 1000.
If only DTC B1200 is present, replace the
climate control unit. If no DTCs are present, it’s an
intermittent failure, the system is OK at this time.
Check for loose or poor connections at the climate
control unit 32P connector, and at under-dash fuse/
relay box connector Q (16P). 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. Wait for at least 6 seconds.
4. Check for DTCs with the HDS.
Troubleshoot DTC B1000.
If only DTC B1750 is present, replace the
HandsFreeLink control unit. If no DTCs are present,
it’s an intermittent failure, the system is OK at this
time. Check for loose or poor connections at the
HandsFreeLink control unit 28P connector, and at
under-dash fuse/relay box connector Q (16P).
Ar e DT Cs B1000, B1008, B1011, B1032, and or B1900 also ind icated w ith DT C B1200? Ar e DT Cs B1000, B1008, B1011, and B1032 and or
B1900 also ind icated w ith DT C B17 50?
08/08/21 14:25:02 61SNR030_220_0109
ProCarManuals.com
DYNOMITE -2009-

Î(#'
)
Except TYPE S model
22-244Gauges
Circuit Diagram - Gauge Control Module (Tach)
UART
WHT
IG1 HOT in ON (II) and START (III)
UNDER-HOOD FUSE/RELAY BOX
5V



MAIN CIRCUIT
MAIN CIRCUIT
MICU
  LT GRN
20
21
PNK
124
CAN L
CAN H 

 CHIME
BRN
WHT BRN
RED 19
1
WHT No. 2 (IG) (50 A)
GAUGE CONTROL MODULE (TACH) 18 17 TACHOMETER ORN
IG1
BAT
BLU
WHT
No. 23 (10 A)
BATTERY
IGNITION SWITCH
No. 1 (BAT) (100 A)
(7.5 A) No. 10UNDER-DASH
FUSE/RELAY
BOX
GAUGE CONTROL
MODULE (SPEEDO)
DRIVE
CIRCUIT DIMMING
CIRCUIT
PARKING
BRAKE
REMINDER
SEAT
BELT
REMINDER
KEY-IN
REMINDER
F-CAN
TRANSCEIVER B-CAN
TRANSCEIVER
IMMOBILIZER-
KEYLESS
CONTROL UNIT GAUGE
CONTROL
MODULE
(SPEEDO) 10 V
STABILIZING
CIRCUIT
HIGH BEAM
INDICATOR
(LED)
LIGHTS-ON
REMINDER
CLIMATE CONTROL
UNIT
HANDSFREELINK
CONTROL UNIT*3 IMMOBILIZER
INDICATOR
(LED)
ON/OFF
5V
5V
CONTROL
CIRCUIT
H1
D4 G2D2
Q1 P5 P10 Q9
A
ECM/PCM
ABS MODULATOR-
CONTROL UNIT*1
VSA MODULATOR-
CONTROL UNIT*2
YAW RATE-LATERAL
ACCELERATION SENSOR*2
EPS CONTROL UNIT
TPMS CONTROL UNIT*2
DATA LINK CONNECTOR
SRS UNIT







 MICU
08/08/21 14:35:12 61SNR030_220_0246
ProCarManuals.com
DYNOMITE -2009-

Î
22-246Gauges
Circuit Diagram - Gauge Control Module (Tach) (cont’d)
G504
G503
SHIFT INDICATOR
AUDIO UNIT
NAVIGATION UNIT
HAZARD WARNING SWITCH LIGHT
MOONROOF SWITCH LIGHT
STEERING SWITCHES LIGHT
RED







GAUGE CONTROL MODULE (TACH)
MIAN CIRCUIT INDICATOR DRIVE CIRCUIT
16
15
14
13
91011
C
B
A
INDICATOR DRIVE CIRCUIT
BLK
BLK




 RED
YEL LT GRN ORN
LIGHTS-ON/FOG LIGHT
INDICATOR
DIMMING CIRCUIT
CRUISE CONTROL
SET/RESUME/CANCEL
SWITCH CRUISE
CONTROL
INDICATOR
(LED)
DASH LIGHTS
BRIGHTNESS
CONTROLLER
A/T GEAR POSITION
INDICATOR COMPULSORY
TURNING-ON
CIRCUIT
CRUISE
DIMMING
CIRCUIT
LIGHTS-ON/FOG LIGHT
INDICATOR
CRUISE
CONTROL
MAIN
SWITCH FAIL-SAFE
CIRCUIT
COMPULSORY
TURNING-OFF
CIRCUIT
MALFUNCTION
INDICATOR
LAMP (MIL)
(LED)
A/T GEAR POSITION INDICATOR
PANEL LIGHT
AMBIENT LIGHT
SEAT HEATER SWITCHES LIGHT
CLIMATE CONTROL UNIT
DASH LIGHTS BRIGHTNESS
CONTROLLER
FRONT PASSENGER’S
AIRBAG CUTOFF INDICATOR
VSA OFF SWITCH CRUISE
MAIN
INDICATOR
(LED)
C
B
08/08/21 14:35:13 61SNR030_220_0248
ProCarManuals.com
DYNOMITE -2009-

Î(#'
)
TYPE S model
22-250Gauges
Circuit Diagram - Gauge Control Module (Tach) (cont’d)
UART
WHT
IG1 HOT in ON (II) and START (III)
UNDER-HOOD FUSE/RELAY BOX









 ECM
VSA MODULATOR-
CONTROL UNIT
YAW RATE-LATERAL
ACCELERATION SENSOR
EPS CONTROL UNIT
TPMS CONTROL UNIT*1
DATA LINK CONNECTOR
SRS UNIT MAIN CIRCUIT
MAIN CIRCUIT
MICU
  GRY
2
21
PNK
124
CAN L
CAN H 

 CHIME
BRN
WHT BRN
RED 19
1
WHT No. 2 (IG) (50 A)
GAUGE CONTROL MODULE (TACH) 18 17 TACHOMETER ORN
IG1
BAT
BLU
WHT
No. 23 (10 A)
BATTERY
IGNITION SWITCH
No. 1 (BAT) (100 A)
(7.5 A) No. 10UNDER-DASH
FUSE/RELAY
BOX
GAUGE CONTROL
MODULE (SPEEDO)
DRIVE
CIRCUIT DIMMING
CIRCUIT
PARKING
BRAKE
REMINDER
SEAT
BELT
REMINDER
KEY-IN
REMINDER
F-CAN
TRANSCEIVER B-CAN
TRANSCEIVER
IMMOBILIZER-
KEYLESS
CONTROL UNIT GAUGE
CONTROL
MODULE
(SPEEDO) 10 V
STABILIZING
CIRCUIT
HIGH BEAM
INDICATOR
(LED)
LIGHTS-ON
REMINDER
CLIMATE CONTROL
UNIT
HANDSFREELINK
CONTROL UNIT*2 IMMOBILIZER
INDICATOR
(LED)
H1
D4 G2D2
Q1 P5 P10 Q9
A DRIVER DRIVERMAIN CIRCUIT
MICU
08/08/21 14:35:15 61SNR030_220_0252
ProCarManuals.com
DYNOMITE -2009-