Pinpoint Tests - OSC Equipped Vehicle

Pinpoint Tests - OSC Equipped Vehicle





Any time an electrical connector or solenoid body is disconnected, inspect the connector for terminal condition, corrosion and contamination. Also inspect the connector seal for damage. Clean, repair or install new as necessary.


Shift Solenoid Pre-Diagnosis

Use the following solenoid operation chart when carrying out Pinpoint Test A.





With a on/off solenoid, OFF = No Hydraulic Flow.

With a Pulse-Width Modulation (PWM) solenoid, OFF = Full Hydraulic Flow.

Pressure Control Solenoid A (PCA) and Pressure Control Solenoid B (PCB) PWM solenoid percentage varies through all gears.





With a on/off solenoid, OFF = No Hydraulic Flow.

With a PWM solenoid, OFF = Full Hydraulic Flow.

PCA and PCB PWM solenoid percentage varies through all gears.


GEAR in Drive Mode

Drive Mode for GEAR operates only when:

- Output Shaft Speed (OSS) and Transmission Range (TR) sensor are operational.
- No OSS and TR sensor DTCs set.
- Engine ON.
- Torque Converter Clutch (TCC) is OFF (TCC cannot be engaged).
- Selector lever is in D.
- Vehicle speed is above 3 km/h (2 mph).


Torque Converter Clutch (TCC) in Drive Mode

The Drive Mode allows the technician to turn the TCC off and on.

Drive Mode for TCC OFF operates only when:

- OSS and TR sensors are operational.
- No OSS and TR sensor DTCs are set.
- Engine is ON.
- Selector lever is in D.
- Vehicle speed is above 32 km/h (20 mph).

Drive Mode for TCC ON operates ONLY when:

- OSS and TR sensors are operational.
- No OSS and TR sensor DTCs are set.
- Engine is ON.
- Selector lever is in D.
- Vehicle speed is above 32 km/h (20 mph).
- Transaxle in 2nd gear or higher.
- Transmission Fluid Temperature (TFT) is between 16°C-135°C (60°F-275°F).
- Brake is not applied below 32 km/h (20 mph).
- Steady vehicle speed is maintained.


Before Pinpoint Tests

NOTE: Read and record all DTCs.

NOTE: Before entering pinpoint tests, check the transaxle, vehicle, TCM and PCM wiring harnesses for correct connections, bent or broken pins, corrosion, loose wires, correct routing, correct seals and their condition. Check the PCM, sensors and actuators for damage. Refer to Computers and Control Systems Information.

After the On-Board Diagnostic (OBD) procedures are completed, repair all DTCs.

Begin with non-transaxle related DTCs, then repair any transaxle-related DTCs. Refer to Diagnostic Trouble Code (DTC) Charts FNR5 for information on condition and symptoms. This chart will be helpful in referring to the correct information and aids in diagnosing internal transaxle concerns and external non-transaxle inputs. The pinpoint tests are used in diagnosing transaxle electrical concerns. Make sure that the vehicle wiring harness and the PCM are diagnosed as well. The Computers and Control Systems Information will aid in diagnosing non-transaxle electronic components.