Pinpoint Test C: Transmission Range Sensor
- Refer to Wiring Diagrams TRANSMISSION CONTROLS - 10R80
for schematic and connector information.
Normal Operation and Fault Conditions
The shift-by-wire variant of the 10R80 transmission uses a park lock pawl valve in the main control valve body to engage and disengage Park. The PCM monitors TR sensors A and B to determine the status of the park system. The 10R80 transmission uses a dual PWM output (at 125 Hz) TR sensor where the duty cycle of TR sensor A increases as the park system is moved from out of park and the duty cycle TR sensor B decreases as the park system is moved out of park. Together, the sum of the two duty cycle signals should add up to 100%.
DTC Fault Trigger Conditions
DTC Description Fault Trigger Condition PCM P0706:00 Transmission Range Sensor "A" Circuit Range/Performance: No Sub Type Information This DTC indicates the frequency of TR sensor A is out of range (expected to be 125 Hz +/- 50 Hz). This could be caused by an open or a short in the TR sensor power or ground circuits. PCM P0707:00 Transmission Range Sensor "A" Circuit Low: No Sub Type Information This DTC indicates the duty cycle of TR sensor A is out of range low (less than 7%). This could be caused by an open circuit or a short to ground in the TR sensor A circuit. PCM P0708:00 Transmission Range Sensor "A" Circuit High: No Sub Type Information This DTC indicates the duty cycle of TR sensor A is out of range high (greater than 93%). This could be caused by a short to power in the TR sensor A circuit. PCM P0709:00 Transmission Range Sensor "A" Circuit Intermittent: No Sub Type Information This DTC illuminates the wrench light in conjunction with P0706, P0707 and/or P0708. Resolve the more specific DTC first. PCM P26C3:00 Internal Control Module Transmission Range Sensor Performance: No Sub Type Information This DTC indicates TR sensors A and/or B are out of range, or the 2 sensors do not correlate. PCM P2801:00 Transmission Range Sensor "B" Circuit Range/Performance: No Sub Type Information This DTC indicates the frequency of TR sensor B is out of range (expected to be 125 Hz +/- 50 Hz). This could be caused by an open or a short in the TR sensor power or ground circuits. PCM P2802:00 Transmission Range Sensor "B" Circuit Low: No Sub Type Information This DTC indicates the duty cycle of TR sensor B is out of range low (less than 7%). This could be caused by an open circuit or a short to ground in the TR sensor B circuit. PCM P2803:00 Transmission Range Sensor "B" Circuit High: No Sub Type Information This DTC indicates the duty cycle of TR sensor B is out of range high (greater than 93%). This could be caused by a short to power in the TR sensor B circuit. PCM P2804:00 Transmission Range Sensor "B" Circuit Intermittent: No Sub Type Information This DTC illuminates the wrench light in conjunction with P2801, P2802 and/or P2803. Resolve the more specific DTC first. PCM P2805:00 Transmission Range Sensor "A"/ "B" Correlation: No Sub Type Information This DTC indicates both TR sensors are within range, but the sum of their duty cycles is out of range (total duty cycle should be 96% to 104%). Possible Sources
- Connectors damaged or pushed-out terminals, corrosion, loose wires and missing or damaged seals
- Circuit open or shorted
- Transmission internal wiring harness
- TR sensor
- PCM
- C1 CHECK THE TR (TRANSMISSION RANGE) SENSOR VREF CIRCUIT FOR VOLTAGE
- Ignition OFF.
- Disconnect Transmission vehicle harness C168A.
- Inspect the connector for damaged or pushed out terminals, corrosion, loose wires and missing or damaged seals.
- Ignition ON.
- Measure:
Positive Lead Measurement / Action Negative Lead C168A-8 Ground
Is the voltage approximately 9 volts?
Yes GO to C2 No GO to C3 - C2 CHECK THE TR (TRANSMISSION RANGE) SENSOR SIGNAL CIRCUITS FOR VOLTAGE
- Ignition ON.
Are the voltages approximately 5 volts?
Yes GO to C6 No GO to C3 - C3 CHECK THE TR (TRANSMISSION RANGE) SENSOR VREF AND SIGNAL CIRCUITS FOR AN OPEN
- Ignition OFF.
- Disconnect PCM C1381T.
- Inspect the connector for damaged or pushed out terminals, corrosion, loose wires and missing or damaged seals.
- Measure:
Positive Lead Measurement / Action Negative Lead C168A-5 C1381T-86 C168A-6 C1381T-85 C168A-8 C1381T-50
Are the resistances less than 3 ohms?
Yes GO to C4 No REPAIR the open circuit. - C4 CHECK THE TR (TRANSMISSION RANGE) SENSOR VREF AND SIGNAL CIRCUITS FOR A SHORT TO GROUND
- Measure:
Positive Lead Measurement / Action Negative Lead C168A-5 Ground C168A-6 Ground C168A-8 Ground
Are the resistances greater than 10, 000 ohms?
Yes GO to C5 No REPAIR the short to ground. - Measure:
- C5 CHECK THE TR (TRANSMISSION RANGE) SENSOR VREF AND SIGNAL CIRCUITS FOR A SHORT TO POWER
- Ignition ON.
- Measure:
Positive Lead Measurement / Action Negative Lead C168A-5 Ground C168A-6 Ground C168A-8 Ground
Is any voltage present?
Yes REPAIR the short to power. No Refer to PCM GUIDED ROUTINE TESTING
Internet Explorer version 11 or greater is required to perform this Pinpoint Test.
After programming the new PCM, CARRY OUT the transmission strategy download. REFER to: Transmission Strategy Download . - C6 CHECK THE TR (TRANSMISSION RANGE) SENSOR GROUND CIRCUIT
- Ignition ON.
Is the voltage approximately 9 volts?
Yes GO to C9 No GO to C7 - C7 CHECK THE TR (TRANSMISSION RANGE) SENSOR GROUND CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect PCM C1381T.
- Inspect the connector for damaged or pushed out terminals, corrosion, loose wires and missing or damaged seals.
Is the resistance less than 3 ohms?
Yes GO to C8 No REPAIR the open circuit. - C8 CHECK THE TR (TRANSMISSION RANGE) SENSOR GROUND CIRCUIT FOR A SHORT TO POWER
- Ignition ON.
- Measure:
Positive Lead Measurement / Action Negative Lead C168A-20 Ground
Is any voltage present?
Yes REPAIR the short to power. No Refer to PCM GUIDED ROUTINE TESTING
Internet Explorer version 11 or greater is required to perform this Pinpoint Test.
After programming the new PCM, CARRY OUT the transmission strategy download. REFER to: Transmission Strategy Download . - C9 CHECK THE TRANSMISSION INTERNAL WIRING HARNESS TR (TRANSMISSION RANGE) SENSOR CIRCUITS FOR AN OPEN
- Ignition OFF.
- Drain the transmission fluid and remove the transmission fluid pan. REFER to: Transmission Fluid Pan, Gasket and Filter .
- Disconnect TR sensor C167.
- Measure:
Positive Lead Measurement / Action Negative Lead
Transmission component side, pin 5C167-2
Transmission component side, pin 6C167-3
Transmission component side, pin 8C167-4
Transmission component side, pin 20C167-1
Are the resistances less than 3 ohms?
Yes GO to C10 No INSTALL a new transmission case harness. REFER to: Transmission Internal Wiring Harness . - C10 CHECK THE TRANSMISSION INTERNAL WIRING HARNESS TR (TRANSMISSION RANGE) SENSOR CIRCUITS FOR A SHORT TO GROUND
- Measure:
Positive Lead Measurement / Action Negative Lead
Transmission component side, pin 5Ground
Transmission component side, pin 6Ground
Transmission component side, pin 8Ground
Transmission component side, pin 20Ground
Are the resistances greater than 10, 000 ohms?
Yes GO to C11 No INSTALL a new transmission case harness. REFER to: Transmission Internal Wiring Harness . - Measure:
- C11 CHECK THE TR (TRANSMISSION RANGE) SENSOR SIGNAL CIRCUITS FOR VOLTAGE THROUGH THE BULKHEAD CONNECTOR
- Connect Transmission vehicle harness C168A.
- Connect PCM C1381T.
- Ignition ON.
Are the voltages approximately 5 volts?
Yes GO to C12 No There is a terminal fitment issue. REPAIR any loose, damaged or bent terminals. - C12 CHECK THE TR (TRANSMISSION RANGE) SENSOR VREF CIRCUIT FOR VOLTAGE THROUGH THE BULKHEAD CONNECTOR
- Ignition ON.
- Measure:
Positive Lead Measurement / Action Negative Lead C167-4 Ground
Is the voltage approximately 9 volts?
Yes GO to C13 No There is a terminal fitment issue. REPAIR any loose, damaged or bent terminals. - C13 CHECK THE TR (TRANSMISSION RANGE) SENSOR GROUND CIRCUIT THROUGH THE BULKHEAD CONNECTOR
- Ignition ON.
Is the voltage approximately 9 volts?
Yes INSTALL a new TR sensor. REFER to: Transmission Range (TR) Sensor . No There is a terminal fitment issue. REPAIR any loose, damaged or bent terminals.