| 1 |
Did you perform the Diagnostic System Check - Engine Controls? |
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Go to Step 2 |
Go to Diagnostic System Check - Engine Controls
in Engine Controls - 3.6L |
| 2 |
Did you perform the Transmission Fluid Checking Procedure? |
- |
Go to Step 3 |
Go to Transmission Fluid Checking Procedure |
| 3 |
- Install a scan tool.
- Turn ON the ignition with the engine OFF.
IMPORTANT:
Before clearing the DTCs, use the scan tool in order to record the Failure Records for reference. Using the Clear Info function will erase the stored Failure Records from the TCM.
- Record the Failure Records.
- Clear the DTCs.
Are any of DTCs P0121, P0122, P0123, P0218, P0502, P0503, P0711, P0712, P1121 or P1122 also set? |
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Go to Step 4 |
Go to Step 5 |
| 4 |
Diagnose the above DTCs first.
Is the diagnosis and repair complete? |
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Go to Step 14 |
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| 5 |
- Use the scan tool snapshot mode in order to record the shift times.
- Drive the vehicle in D4 in order to obtain a 1-2, 2-3 and 3-4 upshift.
- Record the shift times.
Did all the shift times exceed the specified value? |
0.65 seconds |
Go to Step 6 |
Go to Step 8 |
| 6 |
Perform the Line Pressure Check Procedure.
Refer to the Line Pressure Check Procedure
.
Is the line pressure within specifications? |
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Go to Diagnostic Aids |
Go to Step 7 |
| 7 |
Inspect the transmission for the following conditions:
- Fluid level low
Refer to Transmission Fluid Checking Procedure
.
- Oil filter and seal missing, plugged or damaged
Refer to Oil Filter and Seal Replacement
.
- Spacer plate and gasket damaged or mis-assembled
Refer to
Control Valve Body and Spacer Plate Assemble
in Transmission Unit Repair article.
- PC solenoid valve damaged or contaminated
- Pressure regulator valve line-up binding or damaged
- Torque signal valve line-up binding or damaged
Refer to
Control Valve Body Disassemble (Without Touch Activated Power)
Control Valve Body Disassemble (With Touch Activated Power)
in Transmission Unit Repair article.
- Oil pump assembly damaged or missing components
Refer to
Oil Pump Components Disassemble
in Transmission Unit Repair article.
Refer to Incorrect Line Pressure
.
Did you complete the repair? |
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Go to Step 14 |
- |
| 8 |
Did the 1-2 shift time exceed the specified value? |
0.65 seconds |
Go to Step 9 |
Go to Step 10 |
| 9 |
Inspect the transmission for the following conditions:
- 1-2 accumulator piston seals rolled or damaged
- 1-2 accumulator piston and pin missing, binding or damaged
Refer to
Accumulator Components Disassemble
in Transmission Unit Repair article.
- Forward servo assembly damaged or mis-assembled
Refer to
Forward Servo Removal
in Transmission Unit Repair article.
- Oil pump assembly damaged or missing components
Refer to
Oil Pump Components Disassemble
in Transmission Unit Repair article.
- Spacer plate and gaskets damaged or mis-assembled
Refer to
Control Valve Body and Spacer Plate Assemble
in Transmission Unit Repair article.
- Driven sprocket support seals damaged or missing
Refer to
Driven Sprocket Support Components Disassemble
in Transmission Unit Repair article.
- Second clutch piston and seal assembly binding or damaged
- Second clutch fiber and steel plates mis-assembled, burned or damaged
- Second clutch spring assembly damaged or mis-assembled
Refer to
Second Clutch Disassemble
in Transmission Unit Repair article.
- Forward band burned, damaged or mis-assembled
Refer to
1-2 Support Drum and Forward Band Removal
in Transmission Unit Repair article.
- 1-2 support roller clutch assembly damaged or mis-assembled
Refer to
1-2 Support Roller Clutch Disassemble
in Transmission Unit Repair article.
Did you complete the repair? |
- |
Go to Step 14 |
- |
| 10 |
Did the 2-3 shift time exceed the specified value? |
0.65 seconds |
Go to Step 11 |
Go to Step 12 |
| 11 |
Inspect the transmission for the following conditions:
- 2-3 accumulator piston seals rolled or damaged
- 2-3 accumulator piston and pin missing, binding or damaged
Refer to
Accumulator Components Disassemble
in Transmission Unit Repair article.
- Oil pump assembly damaged or missing components
Refer to
Oil Pump Components Disassemble
in Transmission Unit Repair article.
- Spacer plate and gaskets damaged or mis-assembled
Refer to
Control Valve Body and Spacer Plate Assemble
in Transmission Unit Repair article.
- Driven sprocket support seals damaged or missing
Refer to
Driven Sprocket Support Components Disassemble
in Transmission Unit Repair article.
- Third clutch piston seal rolled or damaged
- Third clutch piston damaged or mis-assembled
- Third clutch fiber and steel plates mis-assembled, burned or damaged
- Third clutch spring assembly damaged or mis-assembled
Refer to
Input Clutch and Third Clutch Disassemble
in Transmission Unit Repair article.
- Third sprag clutch assembly damaged or mis-assembled
Refer to
Input and Third Sprag Clutches Disassemble
in Transmission Unit Repair article.
Did you complete the repair? |
- |
Go to Step 14 |
- |
| 12 |
Did the 3-4 shift time exceed the specified value? |
0.65 seconds |
Go to Step 13 |
Go to Diagnostic Aids |
| 13 |
Inspect the transmission for the following conditions:
- Oil pump assembly damaged or missing components
Refer to
Oil Pump Components Disassemble
in Transmission Unit Repair article.
- Spacer plate and gaskets damaged or mis-assembled
Refer to
Control Valve Body and Spacer Plate Assemble
in Transmission Unit Repair article.
- 3-4 accumulator piston seals rolled or damaged
- 3-4 accumulator piston and pin missing, binding or damaged
Refer to
Case Cover Components Inspection
in Transmission Unit Repair article.
- Fourth clutch piston seal rolled or damaged
- Fourth clutch piston damaged, mis-assembled or seized
Refer to
Driven Sprocket Support Components Disassemble
in Transmission Unit Repair article.
- Fourth clutch fiber and steel plates mis-assembled, burned or damaged
Refer to
Fourth Clutch Components Removal
in Transmission Unit Repair article.
- Fourth clutch spring assembly damaged or mis-assembled
Refer to
Driven Sprocket Support Components Disassemble
in Transmission Unit Repair article.
Did you complete the repair? |
- |
Go to Step 14 |
- |
| 14 |
- Change the AT fluid and filter.
- Inspect for correct transmission fluid level.
Refer to Transmission Fluid Checking Procedure
.
- Add new AT fluid as necessary.
IMPORTANT:
The Clear TAP function will clear all adapt cells. This may affect transmission performance. The TCM will update the transmission adapt cell values as the vehicle is driven.
- Using the scan tool, perform the Clear TAP function.
Did you complete the above procedure? |
- |
Go to Step 15 |
- |
| 15 |
Perform the following procedure in order to verify the repair:
- Select DTC.
- Select Clear Info.
- Drive the vehicle in D4.
- Observe Last Shift Time on the scan tool. Ensure that the 1-2, 2-3, and 3-4 shift times are less than 0.65 second.
Was each shift time less than 0.65 second? |
- |
Go to Step 16 |
Go to Step 2 |
| 16 |
With a scan tool, observe the stored information, capture info and DTC info.
Does the scan tool display any DTCs that you have not diagnosed? |
- |
Go to Diagnostic Trouble Code (DTC) List
in Engine Controls - 3.6L |
System OK |