| 234 - ELECTRICAL ROUTINE |
| Powertrain Control System |
- Electrical inputs/outputs, vehicle wiring harnesses, internal transmission wiring harnesses, PCM, TCC, TP
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- Carry out TCC tests. 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 onboard diagnostics.
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| 334 - HYDRAULIC/MECHANICAL ROUTINE |
| Incorrect Pressures |
- Incorrect band/clutch application pressures, line pressure 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 low, check the following possible component: main control.
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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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- 3-4 shift valve (204) torque converter clutch (200), forward modulator valve/EPC boost valve (207), pressure boost valve/main regulator valve (208), 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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| Center Support Assembly |
- Seal rings and bearings damaged
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- Inspect for damage. Repair as required.
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- Outside diameter or case bore damaged or leaking
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- Inspect for damage. Repair as required.
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| Direct Clutch Assembly |
- Clutch assembly burnt, worn, check ball leaking in clutch piston, piston seal rings damaged, friction or steel plates damaged
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- Carry out air pressure test. Inspect for damage. Repair as required.
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| Intermediate Band and Servo Assemblies |
- Band adjustment incorrect
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- Readjust to correct specification.
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- Seal or piston, strut, lever, damaged
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- Inspect for damage. Repair as required.
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- Friction elements worn damaged misassembled
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- Inspect for damage. Repair as required.
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- Return spring wrong, damaged
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- Inspect for damage. Repair as required.
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- Piston rod lever incorrect
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- Inspect for damage. Repair as required.
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- Case bore damaged, leaking
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- Inspect for damage. Repair as required.
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| Torque Converter Clutch Assembly |
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