| 253A - ELECTRICAL ROUTINE |
| Powertrain Control System |
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- Electrical inputs/outputs, vehicle wiring harnesses, internal transmission wiring harnesses, PCM, TCC
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- Carry out shift point tests in O/D with the TCS off. Refer to the shift point specification if out of specifications. Run on-board diagnostic and check for shift error codes. Carry out shift point and TCC tests. Re-run onboard diagnostics. REFER to the INTRODUCTION - CNG, FLEX-FUEL & GASOLINE
article. Carry out pinpoint tests using the diagnostic tool. Clear codes, road test and rerun on-board diagnostics.
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| 353A - HYDRAULIC/MECHANICAL ROUTINE |
| Main Control Assembly |
- Screw out of torque specification
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- Tighten to specification.
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- Gasket damaged, off location
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- Inspect and install a new gasket.
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- Inspect for damage. Repair as required.
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- TCC solenoid stuck, damaged, O-ring damaged or out of bore
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- Inspect for damage. Carry out solenoid function test as listed in electrical routine. Repair as required.
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- 3-4 shift valve (215), spring, damaged, missing, misassembled, stuck, bore damaged
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- Inspect for damage. If damaged, install a new main control. If parts are missing, install new parts or main control. If misassembled, reassemble correctly. Do not stone, file or sand valves. This will remove the anodized finish and may result in further main control or transmission damage.
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- Wrong component used in rebuild
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- Verify that correct components were used.
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| Torque Converter Clutch Assembly |
- Torque converter one-way clutch slipping
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- Inspect one-way clutch. Install a new or remanufactured torque converter.
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- Incorrect TCC used in rebuild
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- Inspect for correct TCC assembly. Install a new TCC as required.
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