Pinpoint Test I: TCM

Pinpoint Tests - OSC Equipped Vehicle

PINPOINT TEST I: TCM

NOTE: Refer to the Transmission Control Module (TCM) Connector illustration Transaxle Connector Layouts Transaxle Connector Layouts.

NOTE: Refer to the Transmission Control Module (TCM) Relay Connector illustration Transaxle Connector Layouts Transaxle Connector Layouts.

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I1 CHECK SJB Fuse 26 (7.5A)


- Ignition OFF.
- Check fuse: Smart Junction Box (SJB) 26 (7.5A).
- Is the resistance less than 5 ohms?

Yes
GO to I2.

No
REPAIR circuit CBP18 (GY/OG) for a short to ground. TEST the system for normal operation.

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I2 CHECK CIRCUIT CBP18 (GY/OG) FOR AN OPEN


- Disconnect: SJB Fuse 26 (7.5A).
- Disconnect: Transmission Control Module (TCM) Relay.
- Measure the resistance between the output side of SJB fuse 26 (7.5A) and TCM relay pin 86, circuit CBP18 (GY/OG).




- Is the resistance less than 5 ohms?

Yes
GO to I3.

No
REPAIR circuit CBP18 (GY/OG) for an open. TEST the system for normal operation.

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I3 CHECK RE406 (GY/VT) FOR AN OPEN


- Measure the voltage between TCM relay pin 86, circuit CBP18 (GY/OG) and TCM relay pin 85, circuit RE406 (GY/VT).




- Is the voltage greater than 10 volts?

Yes
GO to I6.

No
GO to I4.

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I4 CHECK THE TCM GROUND CIRCUIT


- Disconnect: TCM C2352B.
- Measure the resistance between TCM relay pin 85, circuit RE406 (GY/VT) and TCM C2353B-16, circuit RE406 (GY/VT).




- Is the resistance less than 5 ohms?

Yes
GO to I5.

No
REPAIR circuit RE406 (GY/VT) for an open. TEST the system for normal operation.

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I5 CHECK THE TCM GROUND SUPPLY CIRCUIT FOR AN OPEN


- Disconnect: TCM C2352A.
- Measure the resistance between TCM C2352A-1, circuit GD120 (BK/GN) and ground.




- Measure the resistance between C2352A-9, circuit GD120 (BK/GN) and ground.




- Is the resistance less than 5 ohms?

Yes
INSTALL a new TCM. TEST the system for normal operation.

No
REPAIR circuit GD120 (BK/GN) for an open. TEST the system for normal operation.

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I6 CHECK BJB 16 (15A)


- Check fuse: Battery Junction Box (BJB) 16 (15A).
- Is the resistance less than 5 ohms?

Yes
GO to I8.

No
GO to I7.

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I7 CHECK CIRCUIT SBB16 (VT/RD) FOR A SHORT TO GROUND


- Disconnect: BJB Fuse 16 (15A).
- Measure the resistance between the output side of BJB fuse 16 (15A), circuit SBB16 (VT/RD) and ground.




- Is the resistance greater than 10,000 ohms?

Yes
GO to I9.

No
REPAIR circuit SBB16 (VT/RD) for a short to ground. TEST the system for normal operation.

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I8 CHECK CIRCUIT SBB16 (VT/RD) FOR AN OPEN


- Measure the resistance between the output side of BJB fuse 16 (15A), and TCM relay pin 30, circuit SBB16 (VT/RD).




- Is the resistance less than 5 ohms?

Yes
GO to I10.

No
REPAIR circuit SBB16 (VT/RD) for an open. TEST the system for normal operation.

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I9 CHECK THE TCM POWER CIRCUIT FOR A SHORT TO GROUND


- Disconnect: TCM C2352A.
- Disconnect: Intermediate Shaft Speed Sensor C1088.
- Disconnect: Output Shaft Speed (OSS) Sensor C193.
- Measure the resistance between TCM relay pin 87, circuit CE613 (VT/BK) and ground.




- Is the resistance greater than 10,000 ohms?

Yes
INSTALL a new TCM. TEST the system for normal operation.

No
REPAIR circuit CE613 (VT/BK). TEST the system for normal operation.

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I10 CHECK THE TCM POWER SUPPLY FOR AN OPEN CIRCUIT


- Measure the resistance between TCM relay pin 87 and TCM C2352A-2, circuit CE613 (WH/VT).




- Measure the resistance between TCM relay pin 87 and C2352A-10, circuit CE613 (WH/VT).




- Is the resistance less than 5 ohms?

Yes
GO to I11.

No
REPAIR circuit CE613 (WH/VT) for an open. TEST the system for normal operation.

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I11 CHECK FOR POWER FROM THE SJB


- Ignition ON.
- Measure the voltage between TCM C2352A-3 and ground.




- Is the voltage greater than 10 volts?

Yes
INSTALL a new TCM. TEST the system for normal operation.

No
REPAIR circuit SBP07 (WH/RD). TEST the system for normal operation.

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