Pinpoint Test C : TR (Transmission Range) Sensor
Pinpoint Tests - OSC Equipped Vehicle
Pinpoint Tests
NOTE: Refer to all TSBs and On-Line Automotive Service Information System (OASIS) messages that pertain to the transmission concern and follow the procedure as described.
PINPOINT TEST C : TR (Transmission Range) SENSOR
NOTE: Refer to the Transmission Vehicle Harness Connector illustration within the Transmission Connector Layouts Transmission Connector Layouts procedure.
NOTE: Refer to the Transmission Internal Harness Connector illustration within the Transmission Connector Layouts Transmission Connector Layouts procedure.
NOTE: Read and record all DTCs.
NOTE: Use the PID Chart for available diagnostic PIDs. Refer to Diagnostic Parameters Identification (PID) Chart Diagnostic Parameters Identification (PID) Chart.
NOTE: PCM connector C175T is used for 5.4L engine vehicles and connector C1551T is used for 6.8L engine vehicles.
C1 VERIFY THE DTCs
- Select PARK.
- Connect the scan tool.
- Ignition ON.
- Carry out the self-test.
Are only Transmission Range (TR) sensor DTCs present?
Yes
GO to C3.
No
GO to C2.
C2 VERIFY THE SELECTOR LEVER CABLE ADJUSTMENT
- Select DRIVE.
- Verify that the selector lever cable is correctly adjusted.
Is the selector lever cable correctly adjusted?
Yes
GO to C3.
No
ADJUST the selector lever cable. REFER to Automatic Transmission/Transaxle. GO to C3.
C3 CHECK THE ELECTRICAL SYSTEM OPERATION (START AND REVERSE)
- Select PARK.
- Start the engine.
- Ignition OFF.
- Select NEUTRAL.
- Start the engine.
- Select PARK.
- Ignition OFF.
- Select REVERSE.
- Ignition ON.
- Check the reverse lamp illumination.
Does the engine crank in PARK and NEUTRAL and do the reverse lamps illuminate?
Yes
The problem is not in the TR (Transmission Range) sensor. REFER to Starting System for further diagnosis of the starting system and reverse lamps.
No
GO to C4.
C4 CHECK THE ELECTRICAL SYSTEM OPERATION [TR (Transmission Range) POSITION SENSOR AND PCM]
- Select PARK.
- Ignition OFF.
- Check the transmission vehicle harness C1385 is fully seated, terminals are fully engaged in the connector and are in good condition before proceeding.
- Ignition ON.
- Move the selector lever into each gear and stop.
- Observe PIDs: TR_DC and TR_FREQ.
- Monitor PID: TR_FREQ.
- Compare the PID: TR_DC to the TR (Transmission Range) position Duty Cycle Chart.
TR_DC Duty Cycle Chart
Position Min % Duty Cycle Max % Duty Cycle P 7.13 23.76 R 23.77 38.48 N 38.49 48.55 D 48.56 58.82 3 58.83 68.08 2 68.09 77.96 1 77.97 90.34
Is the PID: TR_FREQ in the range of 100 to 150 Hz?
Is the PID: TR_DC in the TR (Transmission Range) position Duty Cycle range?
Does PID: TR_DC remain steady when the harness is wiggled, the sensor is tapped or the vehicle is driven?
Yes
The problem is not in the TR (Transmission Range) sensor system. REFER to Diagnosis By Symptom Diagnosis By Symptom for additional diagnosis.
No
If TR_DC changes when wiggling the harness, tapping on the sensor or driving the vehicle, the problem may be intermittent.
GO to C5.
C5 CHECK THE HARNESS CIRCUITS FOR AN OPEN
- Ignition OFF.
- Disconnect: Transmission Vehicle Harness C1385.
- Disconnect: PCM C175T (5.4L).
- Disconnect: PCM C1551T (6.8L).
- Disconnect: Output Shaft Speed (OSS) Sensor C1107.
- Disconnect: Turbine Shaft Speed (TSS) /intermediate shaft speed sensor C1387.
- Check the C1385, C175T(5.4L) or C1551T(6.8L) terminals are fully engaged in the connector and are in good condition before proceeding.
- For 5.4L engines, measure the resistance between transmission vehicle harness C1385 and PCM C175T using the following chart.
Transmission Connector Circuit PCM C1385-21 LE111 (VT/GN) C175T-1 C1385-17 RET24 (BN/BU) C175T-47 C1385-15 VET32 (VT) C175T-41
- For 6.8L engines, measure the resistance between transmission vehicle harness C1385 and PCM C1551T using the following chart.
Transmission Connector Circuit PCM C1385-21 LE111 (VT/GN) C1551T-39 C1385-17 RET24 (BN/BU) C1551T-50 C1385-15 VET32 (VT) C1551T-19
Are the resistances less than 5 ohms?
Yes
GO to C6.
No
REPAIR the faulty circuit. CLEAR the DTCs. TEST the system for normal operation.
C6 CHECK THE HARNESS CIRCUITS FOR A SHORT TO GROUND
- Measure the resistance between transmission vehicle harness C1385 and ground using the following chart.
Transmission Connector Circuit Ground C1385-21 LE111 (VT/GN) Ground C1385-17 RET24 (BN/BU) Ground C1385-15 VET32 (VT) Ground
Are the resistances greater than 10,000 ohms?
Yes
GO to C7.
No
REPAIR the faulty harness circuit. CLEAR the DTCs. TEST the system for normal operation.
C7 CHECK THE INTERNAL HARNESS FOR AN OPEN
- Drain the transmission fluid.
- Remove the transmission fluid pan.
- Remove the transmission fluid filter.
- Disconnect: TR (Transmission Range) Sensor.
- Measure the resistance between transmission internal harness C1385 and the component using the following chart.
Transmission Connector Component Terminal C1385-21 TR (Transmission Range) sensor 1 C1385-17 TR (Transmission Range) sensor 2 C1385-15 TR (Transmission Range) sensor 3
Are the resistances less than 5 ohms?
Yes
GO to C8.
No
INSTALL a new internal harness. CLEAR the DTCs. TEST the system for normal operation.
C8 CHECK THE INTERNAL HARNESS FOR A SHORT TO GROUND
- Measure the resistance between transmission internal harness C1385 and ground component side using the following chart.
Transmission Connector Ground C1385-15 Ground C1385-17 Ground C1385-21 Ground
Are the resistances greater than 10,000 ohms?
Yes
INSTALL a new TR (Transmission Range) sensor. REFER to Transmission Range (TR) Sensor Transmission Range (TR) Sensor. CLEAR the DTCs. TEST the system for normal operation.
No
INSTALL a new internal harness.