ACURA CSX 2006 Service Repair Manual

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How to Troubleshoot Circuits at the PCM
Connectors
14-5
A
D E
B
A
C A
D
B
C
A
NOTE: The PCM overwrites data and monitors the EVAP
system for about 30 minutes after the ignition switch is
turned to LOCK (0) or ACC (I). Jumping the SCS line
after turning the ignition switch to LOCK (0) or ACC (I)
cancels this function. Disconnecting the PCM during
this function, without jumping the SCS line first, can
damage the PCM.
1. Make sure the ignition switch is turned to LOCK (0), then jump the SCS line with the HDS.
2. Remove the cover (A).
3. Lift up the under-hood fuse/relay box (D).
4. Remove the coolant reservoir (E). Disconnect PCM connectors A, B, and C, and probe the terminals
from the terminal side of the connectors.
NOTE: PCM connectors A, B, and C have symbols
(A= , B= , C= ) embossed on them for
identification. 5. When diagnosis/troubleshooting is done at the
PCM connector, use the terminal test port (A) above
the terminal you need to check.
6. Connect one side of the patch cord’s terminals (A) to a commercially available digital multimeter (B),
and connect the other side cord’s terminals (C) to a
commercially available banana jack (Pomona
Electronics Tool No. 3563 or equivalent) (D).
7. Gently contact the pin probe (male) at the terminal test port from the terminal side. Do not force the
tips into the terminals.
 For accurate results, always use the pin probe (male).
 To prevent damage to the connector terminals, do not insert test equipment
probes, paper clips, or other substitutes as
they can damage the terminals. Damaged
terminals cause a poor connection and an
incorrect measurement.
 Do not puncture the insulation on a wire. Punctures can cause poor or intermittent
electrical connections.
(cont’d)
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Clear A/T DTCs Procedure
OBD StatusHow to End a Troubleshooting Session
(required after any troubleshooting)
Failure Reproduction Technique
14-6Automatic Transmission
General Troubleshooting Information (cont’d)
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).
3. Make sure the HDS communicates with the PCM. If it does not, go to the DLC circuit troubleshooting
(see page 11-204).
4. Clear the DTC(s) on the HDS screen.
The OBD status shows the current system status of
each DTC and all of the parameters. This function is
used to see if the technician’s repair was successfully
completed. The results of diagnostic tests for the DTC
are displayed as:  PASSED: The on-board diagnosis is successfully completed.
 FAILED: The on-board diagnosis has finished but failed.
 NOT COMPLETED: The on-board diagnosis was running but is out of the enable conditions of the DTC. NOTE: Reset the PCM with the HDS while the engine is
stopped.
1. Turn the ignition switch to LOCK (0).
2. Turn the ignition switch to ON (II), and wait for 30 seconds.
3. Turn the ignition switch to LOCK (0), and disconnect the HDS from the DLC.
4. Do the PCM idle learn procedure (see page 11-310).
5. Start the engine with the shift lever in P or N, and warm it up to normal operating temperature (the
radiator fan comes on).
6. To verify that the problem is repaired, test-drive the vehicle for several minutes at speeds over 50 km/h
(31 mph) or under the same conditions as those
indicated by the freeze data.
Make sure to follow these points while the vehicle is
raised on a lift for the test-drive.  Disable the VSA by pressing the VSA OFF switch.
 VSA DTC’s may come on when test-driving on a lift. If the VSA DTC(s) come on, clear the DTC(s) with the
HDS.
08/08/21 14:37:07 61SNR030_140_0008
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DTC D MIL Detection Item Page(1)Two Drive
Cycle
Detection
Indicator
14-7
DTC Troubleshooting Index
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review General
Troubleshooting Information (see page 14-3).
P0107 (12) Blinks ON or OFFManifold Absolute Pressure (MAP) Sensor
Circuit Low Voltage (see page 14-80)
P0108 (12) Blinks ON or OFFManifold Absolute Pressure (MAP) Sensor
Circuit High Voltage (see page 14-80)
P0335 (88) Blinks ON or OFFCrankshaft Position (CKP) Sensor No
Signal (see page 14-81)
P0339 (88) Blinks ON or OFFCrankshaft Position (CKP) Sensor
Intermittent Interruption (see page 14-81)
P0365 (89) Blinks ON or OFFCamshaft Position (CMP) Sensor B No
Signal (see page 14-82)
P0369 (89) Blinks ON or OFFCamshaft Position (CMP) Sensor B
Intermittent Interruption (see page 14-82)
P0705 (5) Blinks ON Short in Transmission Range Switch Circuit (Multiple Shift-position Input)(see page 14-83)
P0706 (6) OFF ON Open in Transmission Range Switch Circuit(see page 14-92)
P0711 (28) Blinks OFF Problem in ATF Temperature Sensor Circuit(see page 14-96)
P0712 (28) Blinks OFF Short in ATF Temperature Sensor Circuit (see page 14-98)
P0713 (28) Blinks OFF Open in ATF Temperature Sensor Circuit (see page 14-100)
P0716 (15) Blinks ON Problem in Input Shaft (Mainshaft) Speed Sensor Circuit(see page 14-103)
P0717 (15) Blinks ON Problem in Input Shaft (Mainshaft) Speed Sensor Circuit (No Signal Input)(see page 14-103)
P0718 (15) Blinks ON Input Shaft (Mainshaft) Speed Sensor Intermittent Failure(see page 14-107)
P0721 (9) Blinks ON Problem in Output Shaft (C ountershaft)
Speed Sensor Circuit (see page 14-111)
P0722 (9) Blinks ON Problem in Output Shaft (C ountershaft)
Speed Sensor Circuit (No Signal Input) (see page 14-111)
P0723 (9) Blinks ON Output Shaft (C ountershaft) Speed Sensor
Intermittent Failure (see page 14-116)
NOTE: (1): The DTC in parentheses is the flash code the D indicator indicates when the data link connector (DLC) is connected to the HDS, and in the SCS mode.
(2): This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.
(3): The MIL comes on when the PGM-FI system detects the same failure.
(cont’d)
(3)
(3)
(3)
(3)
(3)
(3)
(2)
(2) (2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
08/08/21 14:37:07 61SNR030_140_0009
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DTCD MIL Detection Item Page(1)Two Drive
Cycle
Detection
Indicator
14-8 Automatic Transmission
DTC Troubleshooting Index (cont’d)
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review General
Troubleshooting Information (see page 14-3).
P0731 (64) Blinks OFF Problem in 1st Clutch and 1st Clutch Hydraulic Circuit (1st Gear Incorrect Ratio)(see page 14-120)
P0732 (64) Blinks OFF Problem in 2nd Clutch and 2nd Clutch Hydraulic Circuit (2nd Gear Incorrect Ratio)(see page 14-122)
P0733 (64) Blinks OFF Problem in 3rd Clutch and 3rd Clutch Hydraulic Circuit (3rd Gear Incorrect Ratio)(see page 14-123)
P0734 (64) Blinks OFF Problem in 4th Clutch and 4th Clutch Hydraulic Circuit (4th Gear Incorrect Ratio)(see page 14-125)
P0735 (64) Blinks OFF Problem in 5th Clutch and 5th Clutch Hydraulic Circuit (5th Gear Incorrect Ratio)(see page 14-126)
P0741 (40) Blinks OFF Torque Converter Clutch Hydraulic Circuit Stuck OFF(see page 14-128)
P0747 (76) Blinks ON A/T Clutch Pressure Control Solenoid Valve A Stuck ON(see page 14-129)
P0752 (70) Blinks ON Shift Solenoid Valve A Stuck ON (see page 14-130)
P0756 (71) Blinks ON Shift Solenoid Valve B Stuck OFF (see page 14-132)
P0757 (71) Blinks ON Shift Solenoid Valve B Stuck ON (see page 14-132)
P0761 (72) Blinks ON Shift Solenoid Valve C Stuck OFF (see page 14-133)
P0771 (74) Blinks ON Shift Solenoid Valve E Stuck OFF (see page 14-135)
P0776 (77) Blinks ON A/T Clutch Pressure Control Solenoid Valve B Stuck OFF(see page 14-136)
P0777 (77) Blinks ON A/T Clutch Pressure Control Solenoid Valve B Stuck ON(see page 14-136)
P0780 (45) Blinks ON Shift Control System (see page 14-138)
P0796 (78) Blinks ON A/T Clutch Pressure Control Solenoid Valve C Stuck OFF(see page 14-139)
P0797 (78) Blinks ON A/T Clutch Pressure Control Solenoid Valve C Stuck ON(see page 14-139)
08/08/21 14:37:07 61SNR030_140_0010
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DTC D MIL Detection Item Page(1)Two Drive
Cycle
Detection
Indicator
14-9
P0842 (25) Blinks ON Short in 2nd Clutch Transmission Fluid
Pressure Switch Circuit, or 2nd Clutch
Transmission Fluid Pressure Switch Stuck
ON (see page 14-140)
P0843 (25) Blinks ON Open in 2nd Clutch Transmission Fluid
Pressure Switch Circuit, or 2nd Clutch
Transmission Fluid Pressure Switch Stuck
OFF (see page 14-142)
P0847 (26) Blinks OFF Short in 3rd Clutch Transmission Fluid
Pressure Switch Circuit, or 3rd Clutch
Transmission Fluid Pressure Switch Stuck
ON (see page 14-145)
P0848 (26) Blinks OFF Open in 3rd Clutch Transmission Fluid
Pressure Switch Circuit, or 3rd Clutch
Transmission Fluid Pressure Switch Stuck
OFF (see page 14-147)
P0962 (16) Blinks ON Problem in A/T Clutch Pressure Control
Solenoid Valve A Circuit (see page 14-150)
P0963 (16) Blinks ON Problem in A/T Clutch Pressure Control
Solenoid Valve A (see page 14-153)
P0966 (23) Blinks ON Problem in A/T Clutch Pressure Control
Solenoid Valve B Circuit (see page 14-155)
P0967 (23) Blinks ON Problem in A/T Clutch Pressure Control
Solenoid Valve B (see page 14-158)
P0970 (29) Blinks ON Problem in A/T Clutch Pressure Control
Solenoid Valve C Circuit (see page 14-160)
P0971 (29) Blinks ON Problem in A/T Clutch Pressure Control
Solenoid Valve C (see page 14-163)
P0973 (7) Blinks ON Short in Shift Solenoid Valve A Circuit (see page 14-165)
P0974 (7) Blinks ON Open in Shift Solenoid Valve A Circuit (see page 14-167)
P0976 (8) Blinks ON Short in Shift Solenoid Valve B Circuit (see page 14-170)
P0977 (8) Blinks ON Open in Shift Solenoid Valve B Circuit (see page 14-172)
P0979 (22) Blinks ON Short in Shift Solenoid Valve C Circuit (see page 14-175)
P0980 (22) Blinks ON Open in Shift Solenoid Valve C Circuit (see page 14-177)
P0982 (60) Blinks ON Short in Shift Solenoid Valve D Circuit (see page 14-180)
P0983 (60) Blinks ON Open in Shift Solenoid Valve D Circuit (see page 14-182)
P0985 (61) Blinks ON Short in Shift Solenoid Valve E Circuit (see page 14-185)
P0985 (61) Blinks ON Short in Shift Solenoid Valve E Circuit (see page 14-187)
P0986 (61) Blinks ON Open in Shift Solenoid Valve E Circuit (see page 14-189)
NOTE: (1): The DTC in parentheses is the flash code the D indicator indicates when the data link connector (DLC) is connected to the HDS, and in the SCS mode.
(2): This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.
(4): ’06 model
(5): ’07-09 models
(cont’d)(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2) (2)
(2)
(2)
(2)
(2), (4)
(2), (5)
(2)
08/08/21 14:37:08 61SNR030_140_0011
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DTC D MIL Detection Item Page(1)Two Drive
Cycle
Detection
Indicator
14-10 Automatic Transmission
DTC Troubleshooting Index (cont’d)
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review General
Troubleshooting Information (see page 14-3).













P16C0 (99) OFF ON PCM A/T Control System Incomplete
Update(see page 14-192)
P1717 (62) Blinks OFF Open in Transmission Range Switch ATPRVS Switch Circuit(see page 14-192)
P1730 (45) Blinks ON Problem in Shift Control System: Shift Solenoid Valves A or D Stuck OFF
Shift Solenoid Valve B Stuck ON
Shift Valves A, B, or D Stuck(see page 14-195)
P1731 (45) Blinks ON Problem in Shift Control System: Shift Solenoid Valve E Stuck ON
Shift Valve E Stuck
A/T Clutch Pressure Control Solenoid
Valve A Stuck OFF(see page 14-197)
P1732 (45) Blinks ON Problem in Shift Control System: Shift Solenoid Valves B or C Stuck ON
Shift Valves B or C Stuck(see page 14-198)
P1733 (45) Blinks ON Problem in Shift Control System: Shift Solenoid Valve D Stuck ON
Shift Valve D Stuck
A/T Clutch Pressure Control Solenoid
Valve C Stuck OFF(see page 14-200)
P1734 (45) Blinks ON Problem in Shift Control System: Shift Solenoid Valves B or C Stuck OFF
Shift Valves B or C Stuck(see page 14-201)
P2122 (20) Blinks ON Accelerator Pedal Position (APP) Sensor A (Throttle Position Sensor D) Circuit Low
Voltage Input(see page 14-203)
P2123 (20) Blinks ON Accelerator Pedal Position (APP) Sensor A (Throttle Position Sensor D) Circuit High
Voltage Input(see page 14-204)
U0028 (107) Blinks ON or OFFF-CAN Malfunction (BUS-OFF (PCM)) (see page 14-205)
U0122 (107) Blinks OFF F-CAN Malfunction (PCM-VSA Modulator-Control Unit)(see page 14-206)
U0155 (107) Blinks ON or OFFF-CAN Malfunction
(PCM-Gauge Control Module) (see page 14-207)
NOTE: (1): The DTC in parentheses is the flash code the D indicator indicates when the data link connector (DLC) is connected to the HDS, and in the SCS mode.
(2): This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.
(3): The MIL comes on when the PGM-FI system detects the same failure.
(2)
(3)
(3)
08/08/21 14:37:08 61SNR030_140_0012
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Symptom Probable cause(s) Notes
14-11
Symptom Troubleshooting Index










 








 




When you turn the
ignition switch to
ON (II), the D
indicator comes on
and stays on in all
shift lever
positions, or it
never comes on at
all
F-CAN communication line error
Gauge control module (tach)
defective
PCM defective
Check the F-CAN communication line for a DTC
(see page 22-265).
Check the A/T gear position indicator drive circuit
in the gauge control module (tach) by using the
gauge control module self-diagnostic function
(see page 22-242).
A/T gear position
indicator does not
come on while the
shift lever is in that
position F-CAN communication line error
Gauge control module (tach)
defective
PCM defective
Transmission range switch
defective
Shift cable broken or out of
adjustment
Connection between the shift cable
and transmission or body is worn Check the F-CAN communication line for a DTC
(see page 22-265).
Check the A/T gear position indicator drive circuit
in the gauge control module (tach) by using the
gauge control module self-diagnostic function
(see page 22-242).
Inspect the transmission range switch (see page
14-265).
Check for a loose shift cable at the shift lever and
the selector control lever.
Shift indicator
does not work F-CAN communication line error
Gauge control module (tach)
defective
PCM defective
Transmission range switch
defective
Shift cable broken or out of
adjustment
Connection between the shift cable
and transmission or body is worn Check the F-CAN communication line for a DTC
(see page 22-265).
Check the F-CAN communication line by using
the gauge control module self-diagnostic
function (see page 22-243).
Check the A/T gear position indicator drive circuit
in the gauge control module (tach) by using the
gauge control module self-diagnostic function
(see page 22-242).
Inspect the transmission range switch (see page
14-265).
Check for a loose shift cable at the shift lever and
the selector control lever.
When you press
the paddle shifter (upshift switch)
in S, the
transmission does
not upshift gears A problem in the paddle shifter
(upshift switch) circuit
Check the paddle shifter (upshift switch) circuit
(see page 14-270).
When you press
the paddle shifter (downshift
switch) in S, the
transmission does
not downshift
gears A problem in the paddle shifter
(downshift switch) circuit
Check the paddle shifter (downshift switch)
circuit (see page 14-273).
(cont’d)
08/08/21 14:37:08 61SNR030_140_0013
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SymptomProbable cause(s) Notes
14-12Automatic Transmission
Symptom Troubleshooting Index (cont’d)

















 

Shift lever cannot
be moved from P
while pressing on
the brake pedal
Accelerator pedal position sensor
circuit
Accelerator pedal position sensor
defective
Brake pedal position switch circuit
Brake pedal position switch
defective
Shift lock solenoid defective
Shift lock solenoid control circuit
Shift lock mechanism defective
Throttle body defective
Transmission range switch ATPP
switch stuck OFF
Transmission range switch ATPP
switch line opened Inspect the APP Sensor signal (see page 11-268).
Troubleshoot the shift lock system circuit
(see page 14-280).
Test the shift lock solenoid (see page 14-287).
Inspect the transmission range switch (see page
14-265).
Ignition switch
cannot be moved
from ACCESSORY
(I) to LOCK (0) (key
is pushed in, the
shift lever in P) Interlock control system circuit
Key interlock solenoid stuck ON
Park pin switch stuck OFF
Transmission range switch
Troubleshoot the key interlock system circuit
(see page 14-285).
Inspect the transmission range switch (see page
14-265).
HDS does not
communicate with
the PCM or the
vehicle DLC circuit error Troubleshoot the DLC circuit (see page 11-204).
08/08/21 14:37:08 61SNR030_140_0014
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SymptomProbable cause(s) Notes
14-13













Engine runs, but
vehicle does not
move in any gear
1.
2.
3.
4.
5.
6.
7.
8.
9.
10. Low ATF level
Shift cable broken or out of
adjustment
Connection between the shift
cable and transmission or
body is worn
ATF pump worn or binding
Regulator valve stuck or
spring worn
ATF strainer clogged
Mainshaft worn or damaged
Final gears worn or damaged
Transmission-to-engine
assembly error
Axle disengaged Check the ATF level, and check the ATF cooler lines
for leaks and loose connections. If necessary, clean
the ATF cooler lines.
Check for a loose shift cable at the shift lever and
the selector control lever.
Improper alignment of ATF pump and torque
converter housing may cause ATF pump seizure.
The symptoms are mostly an rpm-related ticking
noise or a high pitched squeak.
Check the line pressure.
Be careful not to damage the torque converter
housing when replacing the main ball bearing. You
may also damage the ATF pump when you torque
down the main valve body. This will result in ATF
pump seizure if not detected. Use the proper tools.
Install the main seal flush with the torque converter
housing. If you push it into the torque converter
housing until it bottoms out, it will block the fluid
return passage and result in damage.
Check the ATF strainer for debris. If the ATF
strainer is clogged with particles of steel or
aluminum, inspect the ATF pump. If the ATF pump
is OK, find the damaged components that caused
the debris. If no cause for contamination is found,
replace the torque converter.
Inspect the differential pinion gears for wear. If the
differential pinion gears are worn, replace the
differential assembly, replace the ATF strainer,
thoroughly clean the transmission, and clean the
torque converter, cooler, and lines.
Vehicle moves in R,
but not in D, S, or
1st in S 1.
2.
3.1st accumulator defective
1st gears worn or damaged
1st clutch defective Check the 1st clutch pressure.
Inspect the clutch piston, the clutch piston check
valve, and the O-rings. Check the spring retainer
and the retainer seal for wear and damage. Inspect
the clearance between the clutch end-plate and the
top disc. If the clearance is out of tolerance, inspect
the clutch discs and the plates for wear and
damage. If the discs are worn or damaged, replace
them as a set. Inspect the clutch wave-plate height.
If the height is out of tolerance, replace the wave-
plate. If the discs and the plates are OK, adjust the
clearance with the clutch end-plate.
Inspect the 1st clutch feed pipe. If the 1st clutch
feed pipe is scored, replace the end cover.
Replace the secondary shaft if the bushing for the
1st clutch feed pipe is loose or damaged.
Check the 1st accumulator piston, the O-ring, and
the springs in the regulator valve body for wear
and damage.
(cont’d)
08/08/21 14:37:08 61SNR030_140_0015
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SymptomProbable cause(s) Notes
14-14Automatic Transmission
Symptom Troubleshooting Index (cont’d)










Vehicle moves in D
and R, but not in
2ndinS
1.
2.
3.2nd accumulator defective
2nd gears worn or damaged
2nd clutch defective Check the 2nd clutch pressure.
Inspect the clutch piston, the clutch piston check
valve, and the O-rings. Check the spring retainer
and the retainer seal for wear and damage. Inspect
the clearance between the clutch end-plate and the
top disc. If the clearance is out of tolerance, inspect
the clutch discs and the plates for wear and
damage. If the discs are worn or damaged, replace
them as a set. Inspect the clutch wave-plate height.
If the height is out of tolerance, replace the wave-
plate. If the discs and the plates are OK, adjust the
clearance with the clutch end-plate.
Check the 2nd accumulator piston, the O-ring, and
the springs in the servo valve body for wear and
damage.
Vehicle moves in D
and S, but not in R 1.
2.
3.
4.
5.
6.Shift solenoid valve E defective
Shift fork shaft stuck
Shift valve E defective
4th/reverse accumulator
defective
4th clutch defective
Reverse gears worn or
damaged Check for a stored DTC, and check for loose
connectors.
Inspect shift solenoid valve E for seizure, and the
O-rings for wear and damage.
Check for a missing shift fork bolt on the shift fork
shaft.
Check shift valve E in the main valve body for free
movement, and check the shift valve E spring for
wear and damage.
Check the 4th clutch pressure.
Inspect the clutch piston, the clutch piston check
valve, and the O-rings. Check the spring retainer for
wear and damage. Inspect the clearance between
the clutch end-plate and the top disc. If the
clearance is out of tolerance, inspect the clutch
discs and the plates for wear and damage. If the
discs are worn or damaged, replace them as a set.
Inspect the clutch wave-plate height. If the height is
out of tolerance, replace the wave-plate. If the discs
and the plates are OK, adjust the clearance with the
clutch end-plate.
Inspect the reverse selector teeth chamfers, and
inspect the engagement teeth chamfers of the
countershaft 4th gear and the r
everse gear. Replace
the reverse gears and the reverse selector if they
are worn or damaged. If the transmission makes a
clicking, grinding, or whirring noise, also replace
the mainshaft 4th gear, the reverse idler gear, and
the countershaft 4th gear.
08/08/21 14:37:09 61SNR030_140_0016
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