charging ACURA CSX 2006 Service Owner's Manual

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DTC P1549:
YES
NO YES
NO
11-164PGM-FI System
DTC Troubleshooting (cont’d)
Charging System High Voltage
NOTE:
 Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general
troubleshooting information (see page 11-3).
 If a high voltage battery (24 V, etc.) connected to the vehicle, this DTC can be stored.
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Start the engine.
4. Check under these conditions: A/Coff
 Headlights off
 Rear window defogger off
5. Hold the engine speed at 2,000 rpm (A/T in P or N, M/T in neutral) for 1 minute.
6. Check for Temporary DTCs or DTCs with the HDS.
Replace the alternator (see page 4-34), then
go to step 7.
Intermittent failure, the system is OK at this
time. Check for poor connections or loose terminals
at the alternator and the under-hood fuse/relay
box.
7. Turn the ignition switch to ON (II).
8. Reset the ECM/PCM with the HDS.
9. Do the ECM/PCM idle learn procedure (see page 11-310).
10. Start the engine.
11. Check under these conditions: A/Coff
 Headlights off
 Rear window defogger off
12. Hold the engine speed at 2,000 rpm (A/T in P or N, M/T in neutral) for 1 minute. 13. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals at the alternator and the under-hood
fuse/relaybox,thengotostep1.
Troubleshooting is complete. If any other
Temporary DTCs or DTCs are indicated, go to the
indicated DTC’s troubleshooting.
Is DTC P1549 indicated? Is DTC P1549 indicated?
08/08/21 14:20:25 61SNR030_110_0164
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DTC P0506:
YES
NO YES
NO
YES
NO
11-298Idle Control System
DTC Troubleshooting
Idle Control System RPM Lower
Than Expected
NOTE: Before you troubleshoot, record all freeze data
and any on-board snapshot, and review the general
troubleshooting information (see page 11-3).
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Start the engine. Hold the engine speed at 3,000 rpm without load (A/T in P or N, M/T in
neutral) until the radiator fan comes on, then let it
idle.
4. Check under these DATA LIST conditions with the HDS:
 ECTSENSOR1above70°C(156°F)
 IAT SENSOR above 0 °C (32 °F)
 VSSis0km/h(0mph)
 ST FUEL TRIM between 0.69 1.47
 FSS is CLOSED
5. Monitor the OBD STATUS for DTC P0506 in the DTCs MENU with the HDS.
Go to step 6.
If the screen indicates PASSED, go to step 15.
If the screen indicates EXECUTING, keep idling
until a result comes on. If the screen indicates OUT
OF CONDITION, go to step 4 and recheck.
6. Remove the intake air duct from the throttle body; K20Z2 engine (see page 11-348), K20Z3 engine
(see page 11-349). 7. Check for dirt, carbon, or damage in the throttle
bore.
If there is dirt or carbon, clean the throttle
body (see page 11-344). Also check for damage to
the air cleaner element (see page 11-346), then go
to step 9. If there is damage in the throttle bore, go
to step 8.
Check the A/C system or the charging system,
then go to step 9.
8. Replace the throttle body; K20Z2 engine (see page 11-348), K20Z3 engine (see page 11-349).
9. Reset the ECM/PCM with the HDS.
10. Do the ECM/PCM idle learn procedure (see page 11-310).
11. Start the engine. Hold the engine speed at 3,000 rpm without load (A/T in P or N, M/T in
neutral) until the radiator fan comes on, then let it
idle.
12. Check under these DATA LIST conditions with the HDS:
 ECTSENSOR1above70°C(156°F)
 IAT SENSOR above 0 °C (32 °F)
 VSSis0km/h(0mph)
 ST FUEL TRIM between 0.69 1.47
 FSS is CLOSED
13. Check for Temporary DTCs or DTCs with the HDS.
Go to step 19.
Go to step 14.
Does t he scr een i nd i cat e F AILE D? Is there dirt, carbon, or damage in the throttle
bor e?
Is DT C P0506 ind icated ?
08/08/21 14:28:31 61SNR030_110_0298
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YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
11-299
14. Monitor the OBD STATUS for DTC P0506 in the
DTCs MENU with the HDS.
Troubleshooting is complete. If any other
Temporary DTCs or DTCs were indicated in step 13,
go to the indicated DTC’s troubleshooting.
If the screen indicates FAILED, go to step 19. If
the screen indicates EXECUTING, keep idling until
a result comes on. If the screen indicates OUT OF
CONDITION, go to step 11.
15. Remove the intake air duct from the throttle body; K20Z2 engine (see page 11-348), K20Z3 engine
(see page 11-349).
16. Check for dirt, carbon, or damage in the throttle bore.
If there is dirt or carbon, clean the throttle
body (see page 11- 344). Also check for damage to
the air cleaner element (see page 11-346), then go
to step 9. If there is damage in the throttle bore, go
to step 8.
Go to step 17.
17. Recheck with different load conditions (turn on the headlights, blower motor, rear window defogger
and/or A/C, change the gear position, etc.).
18. Monitor the OBD STATUS for DTC P0506 in the DTCs MENU with the HDS.
Intermittent failure, the system is OK at this
time.
If the screen indicates FAILED, check the A/C
system and/or the charging system, then go to step
1 and recheck. If the screen indicates EXECUTING,
keep idling until a result comes on. If the screen
indicates OUT OF CONDITION, go to step 17. 19. 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).
20. Start the engine. Hold the engine speed at 3,000 rpm without load (A/T in P or N, M/T in
neutral) until the radiator fan comes on, then let it
idle.
21. Check under these DATA LIST conditions with the HDS:
 ECTSENSOR1above70°C(156°F)
 IAT SENSOR above 0 °C (32 °F)
 VSSis0km/h(0mph)
 ST FUEL TRIM between 0.69 1.47
 FSS is CLOSED
22. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals at the throttle body and the ECM/PCM. If
the ECM/PCM was updated, substitute a known-
good ECM/PCM (see page 11-7), then go to step 20.
If the ECM/PCM was substituted, go to step 1.
Go to step 23.
23. Monitor the OBD STATUS for DTC P0506 in the DTCs MENU with the HDS.
If the ECM/PCM was updated,
troubleshooting is complete. If the ECM/PCM was
substituted, replace the original ECM/PCM
(see page 11-228). If any other Temporary DTCs or
DTCs were indicated in step 22, go to the indicated
DTC’s troubleshooting.
If the screen indicates FAILED, check for poor
connections or loose terminals at the throttle body
and the ECM/PCM. If the ECM/PCM was updated,
substitute a known-good ECM/PCM (see page 11-7),
then go to step 20. If the ECM/PCM was substituted,
go to step 1. If the screen indicates EXECUTING,
keep idling until a result comes on. If the screen
indicates OUT OF CONDITION, go to step 20.
Does t he scr een i nd i cat e PASSE D?
Is there dirt, carbon, or damage in the throttlebor e?
Does t he scr een i nd i cat e PASSE D? Is DT C P0506 ind icated ?
Does t he scr een i nd i cat e PASSE D?
08/08/21 14:28:31 61SNR030_110_0299
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DTCDetection Item Note
17-24EPS Components
DTC Troubleshooting Index (cont’d)
36-02 EPS Control Unit Internal Circuit (INH Output Circuit) (Initial Diagnosis) (see page 17-39)
37-01 EPS Control Unit Internal Circuit (Step-up Circuit) (Initial Diagnosis) (see page 17-39)
51-01 Low/High Voltage for the Torque Sensor (VT1 and VT2) (Regular
Diagnosis) (see page 17-46)
51-02 Torque Sensor (VT3 Differential-amplification Function) (Regular Diagnosis) (see page 17-50)
51-03 Torque Sensor (VT1, VT2 Rapid-change) (Regular Diagnosis) (see page 17-50)
51-06 Torque Sensor (VT1, VT2 Average) (Regular Diagnosis) (see page 17-50)
51-07 Torque Sensor (VT1, VT2 Initial Check) (Initial Diagnosis) (see page 17-50)
61-04 Open/Short in the EPS Motor Harness (Steering Diagnosis) (see page 17-53)
71-01 EPS Motor Angle Sensor (SIN/COS Signals) (Steering Diagnosis) (see page 17-55)
71-02 EPS Motor Angle Sensor (Neutral Position Learning of SIN/COS) (Initial Diagnosis) (see page 17-55)
71-03 EPS Motor Angle Sensor (SIN/COS Signals) (Steering Diagnosis) (see page 17-55)
71-04 EPS Motor Angle Sensor (Check Signals) (Regular Diagnosis) (see page 17-58)
71-05 EPS Motor Angle Sensor (SIN/COS Signals Charging Amount) (Steering Diagnosis) (see page 17-55)
71-06 EPS Motor Angle Sensor (Neutral Position of SIN/COS) (Initial Diagnosis) (see page 17-55)
NOTE:  Initial diagnosis: Done right after the engine starts and until the EPS indicator goes off.
 Regular diagnosis: Done right after the initial diagnosis until the ignition switch is turned to LOCK (0).
 Steering diagnosis: Done during regular diagnosis while turning steering wheel.
08/08/21 14:53:59 61SNR030_170_0025
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YES
NO
YES
NO
YES
NO
DTC 71-01:
DTC 71-02:
DTC 71-03:
DTC 71-05:
DTC 71-06:
17-5517-55
No. 1
No. 2
No. 1
No. 2
H-W (RED)
H-U (BLK)
H-V (WHT)
EPS MOTOR
1P CONNECTOR
EPS MOTOR
2P CONNECTOR
No. 1
No. 1
EPS MOTOR 2P CONNECTOR
EPS MOTOR 1P CONNECTOR
13. Disconnect the EPS motor 1P connector and the
EPS motor 2P connector.
14. On the EPS motor side, check for continuity between the following terminals of the EPS motor
1P and the EPS motor 2P connector.
Repair open in the wire between the EPS
control unit and the EPS motor.
Open in the EPS motor wire, or EPS motor
internal circuit, replace the EPS motor (see page
17-63). 1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Turn the ignition switch to LOCK (0).
4. Start the engine.
5. Turn the steering wheel to the right or left, and wait
10 seconds or more.
Go to step 6.
Check for loose terminals or poor connections.
If the connections are good, the system is OK at
this time.
6. Check for DTCs with the HDS.
Go to step 7.
Troubleshoot the indicated DTC. If there are
no DTCs, the system is OK at this time.
7. Turn the ignition switch to LOCK (0).
8. Disconnect EPS control unit connector D (28P).
(cont’d)EPS Motor Angle Sensor (SIN/
COS Signals) (Steering Diagnosis)
EPS Motor Angle Sensor (Neutral
Position Learning of SIN/COS) (Initial
Diagnosis)
EPS Motor Angle Sensor (SIN/
COS Signals) (Steering Diagnosis)
EPS Motor Angle Sensor (SIN/
COS Signals Charging Amount) (Steering
Diagnosis)
EPS Motor Angle Sensor (Neutral
Position of SIN/COS) (Initial Diagnosis)
Terminal side of male terminal
Terminal side of male terminals
Is there continuity? Does t he E PS i nd i cat or come on?
Is DT C 7 1-01, 7 1-02, 7 1-03, 7 1-05 or 7 1-06indicated?
08/08/21 14:54:37 61SNR030_170_0056
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HVAC (Heating, Ventilation, andAir Conditioning)
Climate Control
HVAC (Heating, Ventilation, and Air Conditioning)
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Special Tools . 21-2
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Component Location Index . 21-3
A/C Service
Tips and Precautions . 21-6
A/C System Inspection . 21-6
A/C Refrigerant Oil Replacement . 21-7
A/C Line Replacement . 21-8
General Troubleshooting Information . 21-9
DTC Troubleshooting Index . 21-15
Symptom Troubleshooting Index . 21-16
System Description . 21-19
Circuit Diagram . 21-26
DTC Troubleshooting . 21-28
Climate Control Power and Ground Circuit
Troubleshooting . 21-53
Navigation Communication Line Circuit
Troubleshooting . 21-54
Radiator and A/C Condenser Fan Low Speed Circuit
Troubleshooting . 21-56
A/C Condenser Fan High Speed Circuit Troubleshooting . 21-60
A/C Compressor Clutch Circuit Troubleshooting . 21-62
A/C Signal Circuit Troubleshooting . 21-64
In-car Temperature Sensor Test . 21-67
In-car Temperature Sensor Replacement . 21-67
Outside Air Temperature Sensor Test . 21-68
Outside Air Temperature Sensor Replacement . 21-68
Sunlight Sensor Test . 21-69
Sunlight Sensor Replacement . 21-69
Evaporator Temperature Sensor Test . 21-70 ............
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Power Transistor Test . 21-71
Air Mix Control Motor Test . 21-72
Air Mix Control Motor
Replacement . 21-72
Mode Control Motor Test . 21-73
Mode Control Motor Replacement . 21-73
Recirculation Control Motor Test . 21-74
Recirculation Control Motor Replacement . 21-74
Climate Control Unit Removal/Installation . 21-75
Dust and Pollen Filter Replacement . 21-75
Blower Unit Removal/Installation . 21-76
Blower Unit Component Replacement . 21-77
Evaporator Core Replacement . 21-78
Expansion Valve Replacement . 21-80
Heater Unit/Core Replacement . 21-81
A/C Compressor Replacement . 21-83
A/C Compressor Clutch Check . 21-85
A/C Compressor Clutch Overhaul . 21-86
A/C Compressor Thermal Protector
Replacement . 21-87
A/C Compressor Relief Valve Replacement . 21-87
A/C Condenser Replacement . 21-88
Receiver/Dryer Desiccant Replacement . 21-89
Refrigerant Recovery . 21-90
System Evacuation . 21-91
System Charging . 21-92
Refrigerant Leak Check . 21-93
A/C System Noise Check . 21-97
A/C System Test . 21-99
08/08/21 14:40:45 61SNR030_210_0002
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21-621-6 Climate Control
A/C Service Tips and Precautions A/C System Inspection
A
 Compressed air mixed with the R-134a forms a
combustible vapor.
 The vapor can burn or explode causing serious injury.
 Never use compressed air to pressure test R-134a service equipment or vehicle air
conditioning systems.
 Air conditioning refrigerant or lubricant vapor can irritate your eyes, nose, or throat.
 Be careful when connecting service equipment.
 Do not breathe refrigerant or vapor.
The air conditioning system uses HFC- 134a (R-134a)
refrigerant and polyalkyleneglycol (PAG) refrigerant oil,
which are not compatible with CFC-12 (R-12) refrigerant
or mineral oil. Do not use R-12 refrigerant or mineral oil
in this system, and do not attempt to use R-12 servicing
equipment; damage to the air conditioning system or
your servicing equipment will result.
Use only service equipment that is U.L.-listed and is
certified to meet the requirements of SAE J2210 to
remove R-134a from the air conditioning system.
If accidental system discharge occurs, ventilate the
work area before resuming service.
R-134a service equipment or vehicle air c onditioning
systems should not be pressure tested or leak tested
with compressed air.
Additional health and safety information may be
obtained from the refrigerant and lubricant
manufacturers.
 Always disconnect the negative cable from the battery whenever replacing air conditioning parts.
 Keep moisture and dirt out of the system. When disconnecting any lines, plug or cap the fittings
immediately; don’t remove the caps or plugs until
just before you reconnect each line.
 Before connecting any hose or line, apply a few drops of refrigerant oil to the O-ring.
 When tightening or loosening a fitting, use a second wrench to support the matching fitting.
 When discharging the system, use an R-134a refrigerant recovery/recycling/charging station; don’t
release refrigerant into the atmosphere. Before troubleshooting any problem with the air
conditioning system, do the following:
1. With the ignition switch in LOCK (0), inspect the A/C components, the pressure lines, and the hoses for
stains that may indicate a refrigerant or a
compressor oil leak.
2. Check the A/C condenser (A) for material clogging the fins or for damage to the fins:
 Carefully clean any material from the A/C condenser fins with water and detergent. If
deeper cleaning is required, clean the fins with
Honda brite cleaner (P/N 08732-0020B).
 Be sure to dry the A/C condenser completely.
 Refer to the Refrigerant Leak Check (see page 21-93) to confirm leaks if there is visible damage
to the A/C condenser.
Check for stains.
08/08/21 14:40:55 61SNR030_210_0007
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21-19
System Description
EXPANSION VALVE
(Meters the required amount of
refrigerant into the evaporator) RECEIVER/DRYER
DESICCANT
(Traps debris, and
removes moisture)A/C COMPRESSOR
(Suction and compression)
A/C CONDENSER
(Radiation of heat)
A/C PRESSURE SENSOR
(Triple function)
BLOWER FAN
EVAPORATOR
(Absorption of heat)
EVAPORATOR TEMPERATURE SENSOR
RELIEF VALVE
(Relieves pressure at the A/C compressor
when the pressure is too high)
HIGH PRESSURE VAPORHIGH PRESSURE LIQUID
LOW PRESSURE LIQUID
LOW PRESSURE VAPOR
The air conditioning (A/C) system removes heat from the passenger compartment by transferring heat from the
ambient air to the evaporator. The A/C system refrigerant expands in the evaporator, and the evaporator becomes
very cold and absorbs the heat from the ambient air. The blower fan pushes air across the evaporator where the heat
is absorbed, and then it blows the cool air into the passenger compartment.
This vehicle uses HFC-134a (R-134a) refrigerant, which does not contain chlorofluorocar bons. Pay attention to the
following service items:
 Do not mix refrigerants CFC-12 (R-12) and HFC-134a (R-134a). They are not compatible.
 Use only the recommended polyalkyleneglycol (PAG) refrigerant oil (SP-10) designed for the R-134a A/C compressor. Intermixing the recommended (PAG) refrigerant oil with any other refrigerant oil will result in A/C
compressor failure.
 All A/C system parts (A/C compressor, discharge line, suction line, evaporator, A/C condenser, receiver/dryer, expansion valve, O-rings for joints) are designed for refrigerant R-134a. Do not exchange with R-12 parts.
 Use a halogen gas leak detector designed for refrigerant R-134a.
 R-12 and R-134a refrigerant servicing equipment are not interchangeable. Use only a recovery/recycling/charging station that is U.L.-listed and is certified to meet the requirements of SAE J2210 to service the R-134a air
conditioning systems.
 Always recover refrigerant R-134a with an approved recovery/recycling/charging station before disc onnecting any
A/C fitting.
(cont’d)
When the refrigerant is below
196 kPa (2.0 kgf/cm , 28 psi)
or above 3,138 kPa (32 kgf/cm ,
455 psi), the ECM/PCM turns the
compressor relay off to protect
the A/C compressor.
When the refrigerant is above
1,470 kPa (15.0 kgf/cm , 213 psi),
the A/C pressure sensor
switches the radiator and
A/C condenser fans to high speed.22
2
08/08/21 14:40:59 61SNR030_210_0020
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DTC B1202 or DTC indicator C and AUTO: DTC B1205, DTC indicator J and AUTO or L and AUTO:
DTC B1206 or DTC indicator F and AUTO:
DTC B1207 or DTC indicator D and AUTO:
YES
NO
YES
NO
YES
NO
21-2821-28Climate Control
DTC Troubleshooting
Climate Control Unit Internal Error
Climate Control Unit Lost
Communication with Gauge Control Module
(TACH) (VSP/NE message)
Climate Control Unit Lost Communication
with Gauge Control Module (TACH) (ECT
message)
Climate Control Unit Lost Communication
with Gauge Control Module (TACH) (ILLUMI
message)
NOTE: Check the battery condition (see page 22-67) and
the charging system (see page 4-26).
1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then turn to ON (II).
3. Do the self-diagnostic with the HDS (see page 21-10) or climate control unit (see page 21-11).
4. Check for DTCs.
The climate control unit is faulty, replace the
climate control unit.
Intermittent failure, the climate control unit is
OK at this time. 1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then turn
to ON (II).
3. Do the self-diagnostic with the HDS (see page 21-10) or climate control unit (see page 21-11).
4. Check the DTCs.
Go to step 5.
Intermittent failure, check for loose wires or
poor connections on the gauge control module
(TACH) and climate control unit circuit.
5. Select UNIT INFORMATION in the BODY ELECTRICAL menu.
6. Select CONNECTED UNIT in the UNIT INFORMATION menu.
Substitute a known-good climate control unit,
and recheck. If the symptom/indication goes away,
replace the original climate control unit.
Go to step 7.
7. Turn the ignition switch to LOCK (0).
I s DT C B1202 or C and AU T O i nd i cat ed ?
I s DT C B1205 , J and AU T O or L and AU T O, and /or DT C B1206 or F and AU T O, and / or DT C B1207or D and AU T O i nd i cat ed ?
I s gauge cont r ol mod ul e d et ect ed ?
08/08/21 14:41:04 61SNR030_210_0029
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21-78 Climate Control
Evaporator Core Replacement
A
6x1.0mm
9.8 N·m (1.0 kgf·m, 7.2 lbf·ft)
6x1.0mm
9.8 N·m (1.0 kgf·m, 7.2 lbf·ft)
A B
C
D
6x1.0mm
9.8 N·m
(1.0 kgf·m, 7.2 lbf·ft) A
1. Recover the refrigerant with a recovery/recycling/
charging station (see page 21-90).
2. Disconnect the clamp (A), then remove the bolt.
3. Remove the nut, then disconnect the A/C lines (A) from the evaporator core. 4. Remove the stud bolt.
5. Remove the blower unit (see page 21-76).
6. Disconnect the connectors (A) from the evaporator
temperature sensor and the power transistor, then
remove the connector clip (B). Remove the
self-tapping screws, the expansion valve cover (C),
and the seal (D).
08/08/21 14:43:41 61SNR030_210_0079
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