NO.5 NO FORWARD AND NO REVERSE ENGAGEMENTS (NO VEHICLE MOVEMENT) [LA4AX-EL (CD4E)]

id0503a2807900

5

No forward and no reverse engagements (no vehicle movement)

POSSIBLE CAUSE

• ATF
• Improper pressure
• Internal or external linkage malfunction
• Control valve body malfunction
• Oil filter and seal component malfunction
• Oil pump malfunction
• Drive plate malfunction
• Turbine shaft to forward/coasting/direct (F/C/D) clutch cylinder malfunction
• Torque converter malfunction
• Chain and sprocket component malfunction
• Park mechanism malfunction
• Joint shafts malfunction
• Final drive and differential component malfunction
• Planetary gear sets (Differential) malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
ATF
• Are there any problems with the following?
- Level
- Condition
(See AUTOMATIC TRANSAXLE FLUID (ATF) INSPECTION [LA4AX-EL (CD4E)].)
Yes
Service if necessary
No
Go to the next step
2
Improper pressures
• Do any of the following malfunctions exist?
- Low line pressure
- No line pressure
(See Line Pressure Test.)
Yes
If the pressure is low, inspect the following components: Control valve body, oil filter and seal component, oil pump
Go to step 4
If normal, proceed to the turbine shaft
Inspect the torque converter pump shaft and component
Go to step 7
No
Go to the next step
3
Internal or external shift linkages
• Do any of the following malfunctions exist?
- Damage
- Misadjustment
- Misassembly
(See SELECTOR LEVER REMOVAL/INSTALLATION.)
Yes
Service if necessary
No
Go to step 10
4
Control valve body
• Do any of the following malfunctions exist?
- Bolts are not tightened to the specification
- Gaskets are damaged
- Pressure plate/gasket are damaged or missing
- Main regulator valve, manual valve are stuck, damaged, plugged, or missing, "Z" Link is not connected
Yes
Service if necessary
No
Go to the next step
5
Oil filter and seal component
• Do any of the following malfunctions exist?
- Filter/seal is damaged, plugged, or missing
- Recirculating seal is damaged or out of position
Yes
Service if necessary
No
Go to the next step
6
Oil pump
• Do any of the following malfunctions exist?
- Bolts are not tightened to the specification
- Gasket is damaged, missing
- Porosity/cross leaks, or passage (s) are blocked
- Pump support seal rings are missing
- Oil pump shaft is broken or damaged
Yes
Service if necessary
No
Go to step 3
7
Drive plate
• Do any of the following problems exist?
- Damaged
- Broken
(See DRIVE PLATE REMOVAL [LA4AX-EL (CD4E)].)
(See DRIVE PLATE INSTALLATION [LA4AX-EL (CD4E)].)
Yes
Service if necessary
No
Go to the next step
8
Turbine shaft to forward/coasting/direct clutch cylinder housing
• Is the spline damaged?
Yes
Service if necessary
No
Go to the next step
9
Torque converter component
• Do any of the following malfunctions exist?
- Oil pump shaft insert is damaged
- Studs are broken or damaged
- Splines are damaged
- Internal blades are damaged or broken
Yes
Service if necessary
No
Go to step 3
10
Chain and sprocket component
• Do any of the following malfunctions exist?
- Broken
- Damaged
Yes
Service if necessary
No
Go to the next step
11
Park mechanism
• Are any of the parking pawl return springs damaged, missing, or misassembled?
Yes
Service if necessary
No
Go to the next step
12
Joint shaft
• Do any of the following malfunctions exist?
- Broken parts
- Splines damaged
(See AUTOMATIC TRANSAXLE REMOVAL [LA4AX-EL (CD4E)].)
(See AUTOMATIC TRANSAXLE INSTALLATION [LA4AX-EL (CD4E)].)
Yes
Service if necessary
No
Go to the next step
13
Final drive and differential component
• Do any of the following malfunctions exist?
- Splines are damaged
- Gear set is damaged
Yes
Service if necessary
No
Go to the next step
14
Planetary gear sets (differential)
• Are there any malfunctions with the following?
- Gear Teeth
- Carriers
- Splines
Yes
Service if necessary
No
The problem is resolved
15
• Verify the test results.
- If normal, return to the diagnostic index to service any additional symptoms.
- If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform repair or diagnosis.
• If the vehicle is repaired, troubleshooting is completed.
• If the vehicle is not repaired or additional diagnostic information is not available, replace the PCM.