| 257 - ELECTRICAL ROUTINE |
| Powertrain Control System |
- Electrical inputs/outputs, vehicle wiring harnesses, internal transmission wiring harnesses, PCM, TFT, TCC
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- Carry out shift point and TCC test. Run on-board 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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| 357 - HYDRAULIC/MECHANICAL ROUTINE |
| Fluid |
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| Incorrect Pressures |
- Incorrect band/clutch application pressures, line pressure high/low
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- Check line pressure at tap. Carry out line pressure and stall speed tests. Refer to the LINE PRESSURE CHART for specifications. If pressure is high/low, check the following possible components: main control, TCC.
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| 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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- Thermostat bypass valve/cooler limit valve (216), 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 |
- Seized torque converter one-way clutch
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- Refer to routines 240/340 .
- Inspect torque converter one-way clutch.
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- Install a new or remanufactured torque converter as required. Run on-board diagnostics.
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| Other |
- Restriction in transmission oil cooler or tubes
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- Repair transmission oil cooler or tubes.
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