Battery ACURA CSX 2006 Service Repair Manual


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YES
NO
YES
NO YES
NO
21-66Climate Control
A/C Signal Circuit Troubleshooting (cont’d)
A/C COMPRESSOR CLUTCH 3P CONNECTOR
GRN/RED RED/BLK
A/C COMPRESSOR CLUTCH 3P CONNECTOR BRN
CLIMATE CONTROL UNIT 32P CONNECTOR
18. Turn the ignition switch to LOCK (0).
19. Disconnect the A/C compressor clutch 3P connector.
20. Turn the ignition switch to ON (II).
21. Measure the voltage between the A/C compressor
clutch 3P connector terminal No. 1 and body
ground.
Go to step 22.
Repair open in the wire between the A/C
compressor and the MICU. If the wire is OK,
substitute a known-good MICU and recheck. If the
symptom goes away, replace the original MICU
(see page 22-66).
22. Test the A/C compressor thermal protector (see page 21-85).
Go to step 23.
Replace the A/C compressor thermal
protector (see page 21-87). 23. Check for continuity between the climate control
unit 32P connector terminal No. 6 and the A/C
compressor clutch 3P connector terminal No. 3.
Check for loose wires or poor connections at
the climate control unit 32P connector and at the
A/C compressor clutch 3P connector.
Repair open in the wire between the climate
control unit and A/C compressor.
Wire side of female terminals Wire side of female terminalsWire side of female terminals
Is there battery voltage?
I s t he A/ C compr essor t her mal pr ot ect or OK ? Is there continuity?
08/08/21 14:43:34 61SNR030_210_0067
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Max Cool: About 0.5 V
Max Hot: About 4.5 V
21-7221-72 Climate Control
Air Mix Control Motor Test
Air Mix Control Motor Replacement
AIR MIX CONTROL MOTOR
B
A
NOTE: Before testing, check for HVAC DTCs (see page
21-9). 1. Disconnect the 7P connector from the air mix control motor.
Incorrectly applying power and ground to
the air mix control motor will damage it.
Follow the instructions carefully.
2. Connect battery power to terminal No. 1 of the air mix control motor, and ground terminal No. 2; the
air mix control motor should run, and stop at Max
Hot. If it doesn’t, reverse the connections; the air
mix control motor should run, and stop at Max Cool.
When the air mix control motor stops running,
disconnect battery power immediately.
3. If the air mix control motor did not run in step 2, remove it, then check the air mix control linkage
and door for smooth movement.
 If the linkage and door move smoothly, replace the air mix control motor (see page 21-72).
 If the linkage or door sticks or binds, repair them as needed.
 If the air mix control motor runs smoothly, go to step 4.
4. Measure the resistance between terminals No. 5 and No. 7. It should be between 4.2 to 7.8 k .
5. Reconnect the air mix control motor 7P connector, then turn the ignition switch to ON (II).
6. Using the backprobe set, measure the voltage between terminals No. 3 and No. 7.
7. If either the resistance or voltage readings are not as specified, replace the air mix control motor
(see page 21-72). 1. Remove the driver’s dashboard undercover
(see page 20-103).
2. Disconnect the 7P connector (A) from the air mix control motor (B). Remove the self-tapping screws
and the air mix control motor from the heater unit.
3. Install the motor in the reverse order of removal. Make sure the pin on the motor is properly
engaged with the linkage. After installation, make
sure the motor runs smoothly.
08/08/21 14:43:37 61SNR030_210_0073
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21-7321-73
Mode Control Motor Test Mode Control Motor Replacement
MODE CONTROL MOTOR
A
B
A B
NOTE: Before testing, check for HVAC DTCs (see page
21-9).
1. Disconnect the 7P connector from the mode control motor.
Incorrectly applying power and ground to
the mode control motor will damage it.
Follow the instructions carefully.
2. Connect battery power to terminal No. 1 of the mode control motor, and ground terminal No. 2;
the mode control motor should run smoothly, and
stop at Vent. If it doesn’t, reverse the c onnections;
the mode control motor should run smoothly, and
stop at Defrost. When the mode control motor
stops running, disconnect battery power
immediately.
3. If the mode control motor did not run in step 2, remove it, then check the mode control linkage and
doors for smooth movement.
 If the linkage and doors move smoothly, replace the mode control motor (see page 21-73).
 If the linkage or doors stick or bind, repair them as needed.
 If the mode control motor runs smoothly, go to step 4.
4. Use a digital multimeter with an output of 1 mA or less at the 20 k range. With the mode control
motor running as in step 2, check for continuity
between terminals No. 3, 4, 5, and 6 and terminal
No. 7 individually. There should be continuity for a
moment at each terminal as the motor moves past
the switch’s terminal.
5. If there is no continuity for a moment at each terminal, replace the mode control motor (see page
21-73). 1. Remove the glove box (see page 20-104).
2. Remove the wire harness clip (A), the self-tapping
screws, and the passenger’s heater duct (B).
3. Disconnect the 7P connector (A) from the mode control motor (B). Remove the self-tapping screws
and the mode control motor from the heater unit.
4. Install the motor in the reverse order of removal. Make sure the pin on the motor is properly
engaged with the linkage. After installation, make
sure the motor runs smoothly.
08/08/21 14:43:38 61SNR030_210_0074
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Recirculate: About 4.0 V
Fresh: About 1.0 V
21-7421-74 Climate Control
Recirculation Control Motor Test Recirculation Control Motor
Replacement
RECIRCULATION CONTROL MOTOR
A
B
NOTE: Before testing, check for HVAC DTCs (see page
21-9). 1. Disconnect the 7P connector from the recirculation control motor.
Incorrectly applying power and ground to
the recirculation control motor will damage it.
Follow the instructions carefully.
2. Connect battery power to terminal No. 1 of the recirculation control motor, and ground terminal
No. 2; the recirculation control motor should run,
and stop at Recirculate. If it doesn’t, reverse the
connections; the recirculation control motor should
run, and stop at Fresh. When the recirculation
control motor stops running, disconnect battery
power immediately.
3. If the recirculation control motor did not run in step 2, remove it, then check the recirculation control
linkage and door for smooth movement.
 If the linkage and door move smoothly, replace the recirculation control motor (see page 21-74).
 If the linkage or door sticks or binds, repair them as needed.
 If the recirculation control motor runs smoothly, go to step 4.
4. Measure the resistance between terminals No. 5 and No. 7. It should be between 4.2 to 7.8 k .
5. Reconnect the recirculation control motor 7P connector, then turn the ignition switch to ON (II).
6. Using the backprobe set, measure the voltage between terminals No. 3 and No. 7.
7. If either the resistance or voltage readings are not as specified, replace the recirculation control motor
(see page 21-74). 1. Remove the glove box (see page 20-104) and the
kick panel (see page 20-66).
2. Disconnect the 7P connector (A) from the recirculation control motor (B). Remove the self-
tapping screws and the recirculation control motor
from the blower unit.
3. Install the motor in the reverse order of removal. Make sure the pin on the motor is properly
engaged with the linkage. After installation, make
sure the motor runs smoothly.
08/08/21 14:43:38 61SNR030_210_0075
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21-81
Heater Unit/Core Replacement
A
B C
8x1.25mm
12.3 N·m
(1.3 kgf·m, 9.0 lbf·ft)
B A
SRS components are located in this area. Review the
SRS component locations (see page 24-11) and the
precautions and procedures (see page 24-13) before
doing repairs or service.
1. Do the battery terminal disconnection procedure (see page 22-68).
2. Disconnect the A/C line from the evaporator core
(see page 21-78).
3. Remove the air cleaner housing assembly (see page 11-345).
4. When the engine is cool, drain the engine coolant from the radiator (see page 10-8).
5. From under the hood, slide the hose clamps (A) back. Disconnect the inlet heater hose (B) and the
outlet heater hose (C) from the heater unit. Note the
orientation of the hoses.
Engine coolant will run out when the hoses are
disconnected; drain it into a clean drip pan. Be sure
not to let coolant spill on the electrical parts or the
painted surfaces. If any coolant spills, rinse it off
immediately. 6. Remove the mounting nut from the heater unit.
Take care not to damage or bend the fuel lines or
brake lines, etc.
7. Remove the dashboard (see page 20- 108).
8. Disconnect the connector (A) from the blower motor. Remove the wire harness clip (B).
(cont’d)
08/08/21 14:43:43 61SNR030_210_0082
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21-8321-83
A/C Compressor Replacement
A C
B
6x1.0mm
9.8 N·m
(1.0 kgf·m,
7.2 lbf·ft)
A
B
13. Remove the self-tapping screws, the heater core cover (A), the grommet (B). and carefully pull out
the heater core (C).
14. Install the heater core and the evaporator core in the reverse order of removal.
15. Install the heater unit in the reverse order of removal, and note these items:
 Do not interchange the inlet and outlet heater hoses, and install the hose clamps securely.
 Refill the cooling system with engine coolant (see page 10-8).
 Make sure that there is no coolant leakage.
 Make sure that there is no air leakage.
 Refer to evaporator core replacement (see page 21-78).
16. Do the battery terminal reconnection procedure (see page 22-68). NOTE: Do not install an A/C compressor into a system
unless you are completely sure that the system is free
of contamination. Installing the A/C compressor into a
contaminated system can result in premature A/C
compressor failure.
1. If the A/C compressor is marginally operable, run the engine at idle speed, and let the air
conditioning work for a few minutes, then shut the
engine off.
2. Recover the refrigerant with a recovery/recycling/ charging station (see page 21-90).
3. Remove the drive belt (see page 4-31).
4. Remove the front bulkhead and the condenser fan shroud (see page 10-19).
5. Remove the splash shield (see page 20-172).
6. Remove the bolt and the nut, then disconnect the suction hose (A) and discharge hose (B) from the
A/C compressor. Plug or cap the lines immediately
after disconnecting them to avoid moisture and
dust contamination.
(cont’d)
08/08/21 14:43:45 61SNR030_210_0084
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21-8321-83
A/C Compressor Replacement
A C
B
6x1.0mm
9.8 N·m
(1.0 kgf·m,
7.2 lbf·ft)
A
B
13. Remove the self-tapping screws, the heater core cover (A), the grommet (B). and carefully pull out
the heater core (C).
14. Install the heater core and the evaporator core in the reverse order of removal.
15. Install the heater unit in the reverse order of removal, and note these items:
 Do not interchange the inlet and outlet heater hoses, and install the hose clamps securely.
 Refill the cooling system with engine coolant (see page 10-8).
 Make sure that there is no coolant leakage.
 Make sure that there is no air leakage.
 Refer to evaporator core replacement (see page 21-78).
16. Do the battery terminal reconnection procedure (see page 22-68). NOTE: Do not install an A/C compressor into a system
unless you are completely sure that the system is free
of contamination. Installing the A/C compressor into a
contaminated system can result in premature A/C
compressor failure.
1. If the A/C compressor is marginally operable, run the engine at idle speed, and let the air
conditioning work for a few minutes, then shut the
engine off.
2. Recover the refrigerant with a recovery/recycling/ charging station (see page 21-90).
3. Remove the drive belt (see page 4-31).
4. Remove the front bulkhead and the condenser fan shroud (see page 10-19).
5. Remove the splash shield (see page 20-172).
6. Remove the bolt and the nut, then disconnect the suction hose (A) and discharge hose (B) from the
A/C compressor. Plug or cap the lines immediately
after disconnecting them to avoid moisture and
dust contamination.
(cont’d)
08/08/21 14:43:45 61SNR030_210_0084
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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
...................... .....
......................
...................................
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.....
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.......................... .........................
............
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.......................................... ................................
.........................................
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 ......................
...................................
.......................................... ......................................................
.............................
......................................... ................................................
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....................................... .................
......................
...................................
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............................... ...............................
....................................... .................
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
......................
.......................................... ................................
.........................................
........................................... ..............................
............................... ........
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................................
..................................... ............................... ........................................
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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
......................
..........................................
........................................... ...............
.......................... ............
.................... ................
...................... .............
......................
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........................................... ...............
.......................... ............
.................... ................
...................... .............
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
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Tips and Precautions
Before Troubleshooting
Handling Connectors
22-3
General Troubleshooting Information
A A A
A
1. Check applicable fuses in the appropriate fuse/relay box.
2. Check the battery for damage, state of charge, and clean and tight connections.
 Do not quick-charge a battery unless the battery ground cable has been
disconnected, otherwise you will damage
the alternator diodes.
 Do not attempt to crank the engine with the battery ground cable loosely
connected or you will s everely damage the
wiring.
 Make sure the connectors are clean and have no loose wire terminals.
 Make sure multiple cavity connectors are packed with dielectric grease (except watertight connectors).
 All connectors have push-down release type locks (A).  Some connectors have a clip on their side used to
attach them to a mount bracket on the body or on
another component. This clip has a pull type lock.
 Some mounted connectors cannot be disconnected unless you first release the lock and remove the
connector from its mount bracket (A).
 Never try to disconnect connectors by pulling on their wires; pull on the connector halves instead.
 Always reinstall plastic covers.
 Before connecting connectors, make sure the terminals (A) are in place and not bent.
(cont’d)
08/08/21 14:22:04 61SNR030_220_0005
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HarnessLocation
Engine Compartment Dashboard Others (Floor, Door, Trunk, and Roof)Notes
22-13
Connectors and Harnesses
Connector Index
Identification numbers have been assigned to in-line connectors, junction connectors, and terminals. The number is preceded by the letter ‘‘C’’
for connectors, ‘‘G’’ for ground terminals, or ‘‘T’’ for non-ground terminals.
A/C wire harness C205, C504 (see page 22-56)
Battery ground cable ( ), G1 (see page 22-14)
Console subharness C551, C601, C603 (see page 22-57)
Dashboard wire harness
(View of driver’s side) C201, C202, C203, C501,
C502, C751, C752, C801
G501, G503(see page 22-28)
Dashboard wire harness
(View of middle section) C503, C506, C551
G504, G506(see page 22-30)
Dashboard wire harness
(View of passenger’s side) C504, C761, C762
G502, G505(see page 22-32)
Driver’s door subharness C754 (see page 22-46)
Driver’s door wire harness C751, C752 C753, C754 (see page 22-46)
Driver’s seat position sensor harness
(With seat heater) C602 (see page 22-52)
Driver’s seat position sensor harness
(Without seat heater) C602 (see page 22-53)
Driver’s seat wire harness C602, C604 (see page 22-52)
Engine compartment wire harness
(Left branch) C101, C102, C103
G301C201 through C205, C209
G401 (see page 22-22)
Engine compartment wire harness
(Right branch) C206, C207
G201, G202G402, G403 (see page 22-26)
Engine ground cable A T1, G2 (see page 22-14)
Engine ground cable B T2, G3 (see page 22-14)
Engine wire harness (A/T) C101, C103, C105, C106, C107
G101 (see page 22-16)
Engine wire harness (M/T) C101, C105, C106 G101 (see page 22-18)
Floor wire harness (Left branch) C204, C209, C501, C502, C506, C601, C603C602, C604, C701,
C702, C771
G601, G603(see page 22-34)
Floor wire harness (Right branch) C781, C782, C783 G602(see page 22-38)
Front passenger’s door subharness C763 (see page 22-48)
Front passenger’s door wire harness C761, C762 C763 (see page 22-48)
Front passenger’s seat wire harness
(With seat heater) C782, C783 (see page 22-54)
Left rear door wire harness C771 (see page 22-50)
ODS unit harness (With seat heater) C782 (see page 22-54)
ODS unit harness (Without seat
heater) C782 (see page 22-55)
Rear window defogger ground wire G801 (see page 22-42)
Rear wire harness (Left branch) C701, C702, C703 G701(see page 22-40)
Rear wire harness (Right branch) (see page 22-42)
Right rear door wire harness C781 (see page 22-51)
Roof wire harness (With moonroof) C801 (see page 22-44)
Roof wire harness (Without moonroof) C801 (see page 22-45)
Shift solenoid wire harness (A/T) C107 (see page 22-16)
Starter subharness ( ) C102, C106
T3, T4
T101, T102 (see page 22-20)
Trunk lid spoiler subharness (TYPE S
model) C703 (see page 22-40)
USB harness C671 (see page 22-34)
USB subharness C671 (see page 22-57)
08/08/21 14:22:07 61SNR030_220_0015
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