Pinpoint Test C: The TCS Is Inoperative
External Controls
Pinpoint Tests
Refer to Wiring Diagram Set 37, Shift Interlock for schematic and connector information. Diagrams By Number
Refer to Wiring Diagram Set 30, Switch Transmission - 6R80 for schematic and connector information. Diagrams By Number
PINPOINT TEST C: THE TCS IS INOPERATIVE
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C1 CHECK VOLTAGE TO THE TCS
- Ignition OFF.
- Disconnect: Selector Lever C307.
- Ignition ON.
- Measure the voltage between selector lever C307-5, circuit CBB46 (WH/BU), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to C2.
No
REPAIR circuit CBB46 (WH/BU). TEST the system for normal operation.
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C2 CHECK TCS FUNCTION
- Measure the resistance between selector lever C307-5 and C307-6, component side, while applying and releasing the Transmission Control Switch (TCS).
- Is the resistance less than 5 ohms with the TCS applied and greater than 10,000 ohms with the TCS released?
Yes
GO to C3.
No
INSTALL a new selector lever knob. TEST the system for normal operation.
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C3 CHECK TCS INPUT CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: PCM C175B.
- Measure the resistance between selector lever C307-6, circuit CET34 (BN/GN), harness side and PCM C175B-29, circuit CET34 (BN/GN), harness side.
- Is the resistance less than 5 ohms?
Yes
GO to C4.
No
REPAIR circuit CET34 (BN/GN) for an open. TEST the system for normal operation.
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C4 CHECK TCS INPUT CIRCUIT FOR A SHORT TO GROUND
- Measure the resistance between selector lever C307-6, circuit CET34 (BN/GN), harness side and ground.
- Is the resistance greater than 10,000 ohms?
Yes
INSTALL a new PCM. PROGRAM the PCM with the latest calibration level. PERFORM the solenoid strategy download procedure. REFER to solenoid body strategy in Automatic Transaxle/Transmission - 6R80 Solenoid Body Strategy. TEST the system for normal operation.
No
REPAIR circuit CET34 (BN/GN) for a short to ground. TEST the system for normal operation.
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