ignition ACURA CSX 2006 Service Repair Manual

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DTC U0028:
YES
NO
YES
NO
YES
NO YES
NO
14-205
F-CAN Malfunction (BUS-OFF
(PCM))
NOTE: Before you troubleshoot, record all freeze data
and any on-board snapshot with the HDS, and review
General Troubleshooting Information (see page 14-3).
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Check for Temporary DTCs or DTCs in the PGM-FI SYSTEM with the HDS.
Go to the DTC U0028 troubleshooting in the
PGM-FI SYSTEM (see page 11-183).
Go to step 4.
4. Check for Temporary DTCs or DTCs in the A/T SYSTEM with the HDS.
Go to step 5.
Intermittent failure, the system is OK at this
time. If any other Temporary DTCs or DTCs were
indicated, go to the indicated DTC’s
troubleshooting.
5. Update the PCM if it does not have the latest software (see page 11-227), or substitute a known-
good PCM (see page 11-7).
6. Start the engine, and wait for at least 2 minutes.
7. Check for Temporary DTCs or DTCs in the A/T SYSTEM with the HDS.
Check for poor connections or loose
terminals at the PCM. If the PCM was updated,
substitute a known-good PCM (see page 11-7), then
go to step 6. If the PCM was substituted, go to step
1.
Go to step 8. 8. Monitor the OBD STATUS for U0028 in the DTCs
MENU with the HDS.
If the PCM was updated, troubleshooting is
complete. If the PCM was substituted, replace the
original PCM (see page 11-228). If any other
Temporary DTCs or DTCs were indicated in step 7,
go to the indicated DTC’s troubleshooting.
If the HDS indicates FAILED, check for poor
connections or loose terminals at the PCM. If the
PCM was updated, substitute a known-good PCM
(see page 11-7), then go to step 6. If the PCM was
substituted, go to step 1. If the HDS indicates NOT
COMPLETED, go to step 6.
I s DT C U 0028 i nd i cat ed i n t he PGM -F I SY ST E M ?
I s DT C U 0028 i nd i cat ed i n t he A/ T SY ST E M ?
I s DT C U 0028 i nd i cat ed i n t he A/ T SY ST E M ? Does the HDS ind icate PASSED?
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DTC U0122:
YES
NO
YES
NO
YES
NO YES
NO
14-206
Automatic Transmission
DTC Troubleshooting (cont’d)
F-CAN Malfunction (PCM-VSA
Modulator-Control Unit)
NOTE: Before you troubleshoot, record all freeze data
and any on-board snapshot with the HDS, and review
General Troubleshooting Information (see page 14-3).
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Check for Temporary DTCs or DTCs in the PGM-FI SYSTEM with the HDS.
Go to the DTC U0122 troubleshooting in the
PGM-FI SYSTEM (see page 11-184).
Go to step 4.
4. Check for Temporary DTCs or DTCs in the A/T SYSTEM with the HDS.
Go to step 5.
Intermittent failure, the system is OK at this
time. If any other Temporary DTCs or DTCs were
indicated, go to the indicated DTC’s
troubleshooting.
5. Update the PCM if it does not have the latest software (see page 11-227), or substitute a known-
good PCM (see page 11-7).
6. Start the engine, and wait for at least 2 minutes.
7. Check for Temporary DTCs or DTCs in the A/T SYSTEM with the HDS.
Check for poor connections or loose
terminals between the VSA modulator-control unit
and the PCM. If the PCM was updated, substitute a
known-good PCM (see page 11-7), then go to step
6. If the PCM was substituted, go to step 1.
Go to step 8. 8. Monitor the OBD STATUS for U0122 in the DTCs
MENU with the HDS.
If the PCM was updated, troubleshooting is
complete. If the PCM was substituted, replace the
original PCM (see page 11-228). If any other
Temporary DTCs or DTCs were indicated in step 7,
go to the indicated DTC’s troubleshooting.
If the HDS indicates FAILED, check for poor
connections or loose terminals between the VSA
modulator-control unit and the PCM. If the PCM
was updated, substitute a known-good PCM
(see page 11-7), then go to step 6. If the PCM was
substituted, go to step 1. If the HDS indicates NOT
COMPLETED, go to step 6.
Is DT C U0122 indicated in the PGM-F I SY ST EM?
Is DT C U0122 indicated in the A/ T SY ST EM?
Is DT C U0122 indicated in the A/ T SY ST EM? Does the HDS ind icate PASSED?
08/08/21 14:45:31 61SNR030_140_0208
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DTC U0155:
YES
NO
YES
NO
YES
NO YES
NO
14-207
F-CAN Malfunction (PCM-Gauge
Control Module)
NOTE: Before you troubleshoot, record all freeze data
and any on-board snapshot with the HDS, and review
General Troubleshooting Information (see page 14-3).
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Check for Temporary DTCs or DTCs in the PGM-FI SYSTEM with the HDS.
Go to the DTC U0155 troubleshooting in the
PGM-FI SYSTEM (see page 11-188).
Go to step 4.
4. Check for Temporary DTCs or DTCs in the A/T SYSTEM with the HDS.
Go to step 5.
Intermittent failure, the system is OK at this
time. If any other Temporary DTCs or DTCs were
indicated, go to the indicated DTC’s
troubleshooting.
5. Update the PCM if it does not have the latest software (see page 11-227), or substitute a known-
good PCM (see page 11-7).
6. Start the engine, and wait for at least 2 minutes.
7. Check for Temporary DTCs or DTCs in the A/T SYSTEM with the HDS.
Check for poor connections or loose
terminals between the gauge control module and
the PCM. If the PCM was updated, substitute a
known-good PCM (see page 11-7), then go to step
6. If the PCM was substituted, go to step 1.
Go to step 8. 8. Monitor the OBD STATUS for U0155 in the DTCs
MENU with the HDS.
If the PCM was updated, troubleshooting is
complete. If the PCM was substituted, replace the
original PCM (see page 11-228). If any other
Temporary DTCs or DTCs were indicated in step 7,
go to the indicated DTC’s troubleshooting.
If the HDS indicates FAILED, check for poor
connections or loose terminals between the gauge
control module and the PCM. If the PCM was
updated, substitute a known-good PCM (see page
11-7), then go to step 6. If the PCM was substituted,
go to step 1. If the HDS indicates NOT COMPLETED,
go to step 6.
Is DT C U0155 indicated in the PGM-F I SY ST EM?
Is DT C U0155 indicated in the A/ T SY ST EM?
Is DT C U0155 indicated in the A/ T SY ST EM? Does the HDS ind icate PASSED?
08/08/21 14:45:31 61SNR030_140_0209
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14-208Automatic Transmission
Road Test
A
1. Apply the parking brake, and block both rear
wheels.
2. Start the engine, and warm it up to normal operating temperature (the radiator fan comes on).
3. Shift to D while pressing the brake pedal. Press the accelerator pedal, and release it suddenly. The
engine should not stall.
4. Repeat step 3 in all shift lever positions.
5. Connect the HDS to the DLC (A) located under the driver’s side of the dashboard.
6. Turn the ignition switch to ON (II), and go to the A/T Data List. Make sure the HDS communicates with
the PCM. If it does not, go to the DLC circuit
troubleshooting (see page 11- 204).7. Prepare the HDS to take a HIGH SPEED SNAPSHOT
(refer to the HDS user guide for more details if
needed):
 Select High Speed icon.
 Select these parameters: – Vehicle Speed
– Output Shaft (Countershaft) Speed (rpm)
– Input Shaft (Mainshaft) Speed (rpm)
– Engine Speed
– APP Sensor A (V)
– ATF Temp Sensor (V)
– Battery Voltage
– Shift Control
– Brake Switch
 Set the Trigger Type to Parameter.
 Adjust the Parameter setting to APP Sensor A above 1.2 V.
 Set the recording time to 60 seconds.
 Set the Trigger point to 30 seconds.
8. Find a suitable level road. When you are ready to do the test, press OK on the HDS.
9. Monitor the HDS and accelerate quickly until the APP Sensor A reads 1.3 V. Maintain a steady
throttle until the transmission shifts to 5th gear,
then slow the vehicle and come to a stop.
10. Save the snapshot if the entire event was recorded or increase the recording time setting as necessary
and repeat step 9.
11. Adjust the Parameter setting to 2.4 V. Retest-drive the vehicle. While monitoring the HDS, accelerate
quickly until the APP Sensor A reads 2.5 V.
Maintain a steady throttle until the transmission
shifts to 5th gear (or reasonable speed), then slow
the vehicle and come to a stop.
12. Save the snapshot if the entire event was recorded or increase the recording time setting as necessary
and repeat step 11.
13. Accelerate quickly until the accelerator pedal is to the floor. Maintain a steady pedal until the
transmission shifts to 3rd gear, then slow to a stop,
and save the snapshot.
08/08/21 14:45:32 61SNR030_140_0210
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Stall Speed rpm:
Specification: 2,150 rpm
Service Limit: 2,000 2,300 rpm Problem Probable causes
14-210
Automatic Transmission
Stall Speed Test
A
1. Make sure the transmission fluid is filled to the
proper level (see page 14-231).
2. Apply the parking brake, and block all four wheels.
3. Connect the HDS to the DLC (A) located under the driver’s side of the dashboard.
4. Turn the ignition switch to ON (II), and go to the A/T Data List. Make sure the HDS communicates with
the PCM. If it does not, go to the DLC circuit
troubleshooting (see page 11- 204).
5. Make sure the A/C switch is OFF.
6. Start the engine, and warm it up to normal operating temperature (the radiator fan comes on).
7. Shift to D while pressing the brake pedal firmly, then fully press the accelerator pedal for
6 to 8 seconds, and note the engine speed. Do not
move the shift lever or remove your foot off the
brake pedal while raising the engine speed.
8. Allow 2 minutes for cooling, then repeat the test in SandR.
NOTE: Do not test the stall speed for more than 10 seconds at a time.
 The stall speed tests should be used for diagnostic purposes only.
 Stall speed test results should be the same with the shift lever in D, S, and R.
 Do not test the stall speed with the A/T oil pressure gauges installed. 9. If the stall speeds are out of the service limit, the
problems and probable causes are listed in the
table.







Stall speed rpm high
in D, S, and R
ATF pump output
low
Clogged ATF strainer
Regulator valve stuck
Slipping clutch
Stall speed rpm high
in R Slippage of 4th clutch
Stall speed rpm low
in D, S, and R Engine output low
Engine throttle valve
closed
Torque converter
one-way clutch
slipping
08/08/21 14:46:42 61SNR030_140_0212
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Special Tools Required
Pressure Fluid PressureStandard Service Limit
14-211
Pressure Test
A
A/T OIL PRESSURE
GAUGE SET
07406-0020401
A/TPRESSUREHOSE,
2,210 mm
07MAJ-PY4011A
(3 required) A/T PRESSURE
HOSE ADAPTER
07MAJ-PY40120
(3 required)
A
 A/T oil pressure gauge set 07406-0020401
 A/T pressure hose, 2,210 mm 07MAJ-PY4011A
 A/T pressure hose adapter 07MAJ-PY40120
NOTE:
 Disable the VSA by pressing the VSA OFF switch (if equipped).
 VSA DTC(s) may come on during the pressure test. If the VSA(s) come on, clear the DTC(s) with the HDS.
1. Make sure the transmission fluid is filled to the proper level (see page 14-231).
2. Raise the vehicle on a lift, or apply the parking brake, block rear wheels, and raise the front of the
vehicle. Make sure it is securely supported.
3. Remove the splash shield.
4. Allow the front wheels to rotate freely.
5. Connect the HDS to the DLC (A) located under the driver’s side of the dashboard.
6. Turn the ignition switch to ON (II). Make sure the HDS communicates with the PCM. If it does not, go
to the DLC circuit troubleshooting (see page
11-204). 7. Connect the A/T oil pressure gauge to the line
pressure inspection port (A). Do not allow dust or
other foreign particles to enter the ports while
connecting the gauges.
8. Start the engine, and warm it up to normal operating temperature (the radiator fan comes on).
9. Measure the line pressure at the line pressure inspection port with the shift lever in P or N while
holding the engine speed at 2,000 rpm.
NOTE: Higher pressure may be indicated if
measurements are made in shift lever position
other than P or N.
Line 900 960 kPa (9.2 9.8 kgf/cm ,
130 140 psi) 850 kPa
(8.7 kgf/cm ,
120 psi)
10. Turn the engine off, then disconnect the A/T oil pressure gauge from the line pressure inspection
port.
11. Install the sealing bolt to the line pressure inspection port with a new sealing washer, and
tighten the bolt to 18 N·m (1.8 kgf·m, 13 lbf·ft). Do
not reuse the old sealing washer.
(cont’d)
22
08/08/21 14:46:42 61SNR030_140_0213
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14-215
Shift Solenoid Valve Test
A A
18x1.5mm
49 N·m
(5.0 kgf·m, 36 lbf·ft) B
A
B
6x1.0mm
12 N·m (1.2 kgf·m, 8.7 lbf·ft)
B
C
1. Connect the HDS to the DLC (A) located under the driver’s side of the dashboard.
2. Turn the ignition switch to ON (II). Make sure the HDS communicates with the PCM. If it does not, go
to the DLC circuit troubleshooting (see page
11-204).
3. Select Shift Solenoid Valves A, B, C, D, and E Test in the Miscellaneous Test Menu with the HDS.
4. Check that shift solenoid valves A, B, C, D, and E operate with the HDS. A clicking sound should be
heard.
 If a clicking sound is heard, the valves are OK. The test is complete, disconnect the HDS.
 If no clicking sound is heard, go to step 5, and test the solenoid valve.
5. Do the battery removal procedure (see page 22-69).
6. Remove the intake air duct (see page 11-348) and the air cleaner assembly (see page 11-345).
7. Remove the battery tray, the battery base, and the resonator.
8. Raise the vehicle on a lift, or apply the parking brake, block the rear wheels, and raise the front of
the vehicle. Make sure it is securely supported.
9. Remove the splash shield. 10. Remove the drain plug (A), and drain the automatic
transmission fluid (ATF).
11. Reinstall the drain plug with a new sealing washer (B).
12. Remove the shift solenoid valve cover (A), the dowel pins (B), and the gasket (C).
(cont’d)
Replace.
Replace.
08/08/21 14:46:44 61SNR030_140_0217
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Standard: 3 10
14-219
A/T Clutch Pressure Control Solenoid Valve A Test
A
A
1. Connect the HDS to the DLC (A) located under the
driver’s side of the dashboard.
2. Turn the ignition switch to ON (II). Make sure the HDS communicates with the PCM. If it does not, go
to the DLC circuit troubleshooting (see page
11-204).
3. Select Clutch Pressure Control (Linear) Solenoid Valve A in the Miscellaneous Test Menu with the
HDS.
4. Test A/T clutch pressure control solenoid valve A with the HDS.
 If the valve tests OK, the test is complete. Disconnect the HDS.
 If the valve does not test OK, follow the instructions on the HDS.
 If the valve does not test OK, and the HDS does not determine the cause, go to step 5.
5. Remove the intake air duct (see page 11-348) and the air cleaner assembly (see page 11-345). 6. Disconnect the A/T clutch pressure control solenoid
valve A connector (A).
7. Measure the resistance between A/T clutch pressure control solenoid valve A connector
terminals No. 1 and No. 2.
 If the resistance is within the standard, go to step 8.
 If the resistance is out of standard, replace A/T clutch pressure control solenoid valve A
(see page 14-221).
8. Connect a jumper wire from the negative battery terminal to solenoid valve A connector terminal
No. 2, and connect another jumper wire from the
positive battery terminal to connector terminal
No. 1.
 If a clicking sound is heard, the valve is OK, and the test is complete, go to step 18.
 If no clicking sound is heard, go to step 9.
(cont’d)
08/08/21 14:46:46 61SNR030_140_0221
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Standard: 3 10
14-222
Automatic Transmission
A/T Clutch Pressure Control Solenoid Valve B Test
A
A
1. Connect the HDS to the DLC (A) located under thedriver’s side of the dashboard.
2. Turn the ignition switch to ON (II). Make sure the HDS communicates with the PCM. If it does not, go
to the DLC circuit troubleshooting (see page
11-204).
3. Select Clutch Pressure Control (Linear) Solenoid Valve B in the Miscellaneous Test Menu with the
HDS.
4. Test A/T clutch pressure control solenoid valve B with the HDS.
 If the valve tests OK, the test is complete. Disconnect the HDS.
 If the valve does not test OK, follow the instructions on the HDS.
 If the valve does not test OK, and the HDS does not determine the cause, go to step 5.
5. Remove the intake air duct (see page 11-348) and the air cleaner assembly (see page 11-345). 6. Disconnect the A/T clutch pressure control solenoid
valve B connector (A).
7. Measure the resistance between A/T clutch pressure control solenoid valve B connector
terminals No. 1 and No. 2.
 If the resistance is within the standard, go to step 8.
 If the resistance is out of standard, replace A/T clutch pressure control solenoid valve B
(see page 14-226).
8. Connect a jumper wire from the negative battery terminal to solenoid valve B connector terminal
No. 2, and connect another jumper wire from the
positive battery terminal to connector terminal
No. 1.
 If a clicking sound is heard, the valve is OK, and the test is complete, go to step 18.
 If no clicking sound is heard, go to step 9.
08/08/21 14:46:47 61SNR030_140_0224
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Standard: 3 10
14-224
Automatic Transmission
A/T Clutch Pressure Control Solenoid Valve C Test
A
A
1. Connect the HDS to the DLC (A) located under the
driver’s side of the dashboard.
2. Turn the ignition switch to ON (II). Make sure the HDS communicates with the PCM. If it does not, go
to the DLC circuit troubleshooting (see page
11-204).
3. Select Clutch Pressure Control (Linear) Solenoid Valve C in the Miscellaneous Test Menu with the
HDS.
4. Test A/T clutch pressure control solenoid valve C with the HDS.
 If the valve tests OK, the test is complete. Disconnect the HDS.
 If the valve does not test OK, follow the instructions on the HDS.
 If the valve does not test OK, and the HDS does not determine the cause, go to step 5.
5. Remove the intake air duct (see page 11-348) and the air cleaner assembly (see page 11-345). 6. Disconnect the A/T clutch pressure control solenoid
valve C connector (A).
7. Measure the resistance between A/T clutch pressure control solenoid valve C connector
terminals No. 1 and No. 2.
 If the resistance is within the standard, go to step 8.
 If the resistance is out of standard, replace A/T clutch pressure control solenoid valve C
(see page 14-226).
8. Connect a jumper wire from the negative battery terminal to solenoid valve C connector terminal
No. 2, and connect another jumper wire from the
positive battery terminal to connector terminal
No. 1.
 If a clicking sound is heard, the valve is OK, and the test is complete, go to step 18.
 If no clicking sound is heard, go to step 9.
08/08/21 14:46:48 61SNR030_140_0226
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