Dodge Dakota (ND). Manual — part 1024
P0735-GEAR RATIO ERROR IN 5TH
For the Transmission circuit diagram (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE -
SCHEMATICS AND DIAGRAMS).
For a complete wiring diagram Refer to Section 8W
•
When Monitored:
Continuously with the ignition on, engine running, with the transmission in gear.
•
Set Condition:
If the ratio of the Input RPM to the Output RPM does not match the current gear ratio. This DTC can take up
to five minutes of problem identification before illuminating the MIL.
Possible Causes
LOW FLUID LEVEL
INPUT SPEED SENSOR OR WIRING
VALVE BODY ACCUMULATOR COVER FAILED
CUT OD OR 2C ACCUMULATOR SEAL
CRACKED OD OR 2C ACCUMULATOR PISTON
BROKEN OR MISSING OD BLEED ORIFICE IN MAIN VALVE BODY
CUT 2C TOWER SEAL
TRANSMISSION SOLENOID/TRS ASSEMBLY
CUT OR MISSING #5, #6, OR #7 CHECK BALL
WORN SOLENOID SWITCH VALVE OR PLUGS
CUT OD OR 2C PISTON SEAL
STUCK MAIN REGULATOR VALVE
BURNED OD OR 2C CLUTCH
BROKEN OR MISSING 2C BLEED ORIFICE IN 2C/4C RETAINER
BROKEN REACTION SHAFT SUPPORT SEAL RING
POOR MACHINING ON PUMP VALVE BODY FACE
LOOSE / MISSING DRIBBLER ORIFICE ASSEMBLY IN REACTION SHAFT SUPPORT
CRACKED / LOOSE / MISSING OD/REVERSE PISTON BLEED ORIFICE
BROKEN REVERSE CARRIER HUB WELD
BROKEN REVERSE SUN GEAR WELD TO REACTION CARRIER
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - TRANSMIS-
SION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - DIAGNOSIS AND TESTING).
Theory of Operation
The transmission system uses two speed sensors, one to measure input RPM and one to measure output RPM.
These inputs are essential for proper transmission operation. Therefore, the integrity of this data is verified through
the following checks:
1) Once in a particular gear, if the gear ratio varies from the correct gear ratio, the corresponding in-gear trouble
code is set (DTCs P0731–36).
2) An excessive change in input or output speeds indicating signal intermittent may result in the DTCs P0715 and/or
P0720 being set.
3) If the common speed sensor ground circuit is lost, both sensor inputs will read the pulses from the input speed
sensor when at a stop in neutral. Since the input speed sensor reads 60 teeth from the input clutch hub and the
output speed sensor reads 30 teeth from the park gear, the result is an apparent speed ratio of 1:2 and may cause
the DTC P1794 to set.
21 - 488
AUTOMATIC TRANSMISSION 545RFE - ELECTRICAL DIAGNOSTICS
ND
P0735-GEAR RATIO ERROR IN 5TH (CONTINUED)
1.
DETERMINING IF RELATED DTC’S ARE PRESENT
With the scan tool, check for other transmission DTC’s
If any of these DTC’s are present, perform their respective tests first.
Are there any Transmission; solenoid, line pressure, speed sensor, and/or loss of prime DTC’s present?
Yes
>> Refer to the Transmission category and perform the appropriate symptom. If any of these DTCs are
present, they may cause a Speed Ratio Error. Perform the test for P0944 first if it is present.
Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1.
No
>> Go To 2
2.
CHECK EATX DTC EVENT DATA
With the scan tool, read and record the EATX DTC EVENT DATA.
NOTE: Make sure to record all EATX DTC EVENT DATA stored in the scan tool for future reference in this
test procedure.
Does the EATX DTC EVENT DATA display information for the DTC P0735?
Yes
>> Go To 4
No
>> Go To 3
3.
CHECK TARTET GEAR
In the EATX DTC EVENT DATA recorded earlier, does the DTC EVENT DATA show the DTC P1790, with
Target gear = 5th, or with both the 2C and OD clutches applying?
Yes
>> Go To 4
No
>> Go To 6
4.
CHECK INPUT RPM
In the EATX DTC EVENT DATA recorded earlier, does the Input RPM read zero?
Yes
>> Refer to the Transmission category and perform the diagnostic procedure for P0715 (Input Speed Sen-
sor Error). Diagnose the DTC as if it is set and current.
No
>> Go To 5
5.
CHECK LINE PRESSURE READING
In the EATX DTC EVENT DATA recorded earlier, is the line pressure reading more than 10 PSI below the
desired line pressure reading?
Yes
>> Remove the Transmission Oil pan and check the Transmission Oil filter for improper installation or
plugged, if Primary oil filter is OK, check the main regulator valve in pump. If excessive debris is in the
oil pan, check clutches and repair as necessary. Refer to the Service Information for proper repair pro-
cedures.
Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1.
No
>> Go To 6
ND
AUTOMATIC TRANSMISSION 545RFE - ELECTRICAL DIAGNOSTICS
21 - 489
P0735-GEAR RATIO ERROR IN 5TH (CONTINUED)
6.
CHECK TRANSMISSION FOR SLIPPAGE
Erase DTCs and road test the vehicle.
Check the transmission operation in reverse and all forward gears.
During the road test, was there any obvious slippage noted in 5th gear or a runaway during the 4–5 shift?
Yes
>> Go To 8
No
>> Go To 7
7.
CHECK IF DTC RESET
With the scan tool, check for Transmission DTCs after the road test.
Did the DTC P0735 reset?
Yes
>> Go To 8
No
>> Test Complete.
8.
CHECK INTERNAL TRANSMISSION
Remove the Transmission Oil Pan and Valve Body, per the Service Information, and check for the following:
— Excessive clutch and or metal debris in the oil pan.
— If the accumulator cover is intact and the 2C tower seal is not cut or split.
— OD and 2C accumulator pistons for cracks or cut seals.
— Solenoid Switch Valve and its plugs for stickiness or wear.
— Cut or missing #5, #6, or #7 check ball.
— OD bleed orifice on top of the valve body.
— Air check the OD and 2C hydraulic clutch circuits for excessive leakage. Refer to the Service information.
NOTE: Both the OD and 2C hydraulic clutch circuits contain a small bleed orifice. A small amount of air
leakage is considered normal. The OD hydraulic clutch circuit bleed orifice connects to the Reverse input
clutch hydraulic cavity. A small amount of air leakage into the Reverse hydraulic clutch circuit is considered
normal.
Were there any problems found?
Yes
>> Repair as necessary. Refer to the Service Information for proper repair procedures.
No
>> Replace the Transmission Solenoid/TRS Assembly per the Service Information.
21 - 490
AUTOMATIC TRANSMISSION 545RFE - ELECTRICAL DIAGNOSTICS
ND
P0736-GEAR RATIO ERROR IN REVERSE
For the Transmission circuit diagram (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE -
SCHEMATICS AND DIAGRAMS)
For a complete wiring diagram Refer to Section 8W
•
When Monitored:
Continuously with the ignition on, engine running, with the transmission in gear.
•
Set Condition:
If the ratio of the Input RPM to the Output RPM does not match the current gear ratio. This DTC can take up
to five minutes of problem identification before illuminating the MIL
Possible Causes
LOW FLUID LEVEL
CUT LR TOWER SEAL ON MAIN VALVE BODY
CUT LR CLUTCH PISTON SEALS
BROKEN OR MISSING LR CLUTCH BLEED ORIFICE (IN LR CLUTCH RETAINER)
CUT LR ACCUMULATOR PISTON SEAL IN MAIN VALVE BODY
CRACKED LR ACCUMULATOR PISTON IN MAIN VALVE BODY
CUT OD/REV PISTON SEALS
BROKEN OR MISSING OD/REV BLEED ORIFICE (IN OD/REV CLUTCH PISTON)
BROKEN REVERSE CARRIER HUB WELD
BROKEN REVERSE SUN GEAR WELD TO THE REACTION CARRIER
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - TRANSMIS-
SION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - DIAGNOSIS AND TESTING).
Theory of Operation
The transmission system uses two speed sensors, one to measure input RPM and one to measure output RPM.
These inputs are essential for proper transmission operation. Therefore, the integrity of this data is verified through
the following checks:
1) Once in a particular gear, if the gear ratio varies from the correct gear ratio, the corresponding in-gear trouble
code is set (DTCs P0731–36).
2) An excessive change in input or output speeds indicating signal intermittent may result in the DTCs P0715 and/or
P0720 being set.
3) If the common speed sensor ground circuit is lost, both sensor inputs will read the pulses from the input speed
sensor when at a stop in neutral. Since the input speed sensor reads 60 teeth from the input clutch hub and the
output speed sensor reads 30 teeth from the park gear, the result is an apparent speed ratio of 1:2 and may cause
the DTC P1794 to set.
Diagnostic Test
1.
DETERMINING IF RELATED DTC’S ARE PRESENT
With the scan tool, check for other transmission DTC’s
Are there any Transmission; solenoid, line pressure, speed sensor, and/or loss of prime DTC’s present?
Yes
>> Refer to appropriate symptom in the Transmission category. Perform the test for P0944–LOSS OF
PRIME first if it is present.
Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1.
No
>> Go To 2
ND
AUTOMATIC TRANSMISSION 545RFE - ELECTRICAL DIAGNOSTICS
21 - 491
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст