Pinpoint Test J : DTCS P0B0D P0C27, P0C28, P0C29, P0C2A, P0C2C, P0C2D, P175A, P0C2E, P2796
WARNING: This page is about a different variant/trim than selected.
- Refer to Transmission Controls - 8F57
for schematic and connector information.
Normal Operation and Fault Conditions
The electric transmission fluid pump keeps the transmission engaged when the engine is stopped and the transmission is in drive. The electric transmission fluid pump has an internal microprocessor and communicates with the PCM over a PWM circuit with a frequency of 150 Hz with a duty cycle range of 10% to 90%.
DTC Fault Trigger Conditions
DTC Description Fault Trigger Condition PCM P0B0D:00 Electric/Auxiliary Transmission Fluid Pump Motor Control Module: No Sub Type Information This DTC sets if the E-pump communication is OK. The frequency is between 130 Hz and 170 Hz and a valid duty cycle was detected (55% to 60% or 65% to 70%). The Electric Transmission Fluid Pump has detected a pump over or under speed condition. The current flow through the pump was within specification. PCM P0C27:00 Electric/Auxiliary Transmission Fluid Pump "A" Motor Current Low: No Sub Type Information Possible causes are loss of pump prime or low transmission fluid level. This DTC sets if the E-pump communication is OK. The frequency is between 130 Hz and 170 Hz but a low current is detected (10% to 15% duty cycle). PCM P0C28:00 Electric/Auxiliary Transmission Fluid Pump "A" Motor Current High: No Sub Type Information This DTC sets if the E-pump communication is OK. The frequency is between 130 Hz and 170 Hz but a low current is detected (20% to 25% duty cycle). PCM P0C29:00 Electric/Auxiliary Transmission Fluid Pump "A" Driver Circuit Performance: No Sub Type Information This DTC sets if the E-pump communication is OK. The frequency is between 130 Hz and 170 Hz but a high current is detected. PCM P0C2A:00 Electric/Auxiliary Transmission Fluid Pump "A" Motor Stalled: No Sub Type Information This DTC sets if the PCM commands the electric transmission fluid pump motor on and does not detect a corresponding increase in pump speed, indicating a stalled pump motor. PCM P0C2C:00 Electric Transmission Fluid Pump Control Module Feedback Signal Range/Performance: No Sub Type Information This DTC sets if the E-Pump frequency is between 125 and 175Hz but has an invalid duty cycle or the frequency is outside of the 125-175Hz range. This can be caused by a loss of power to the E-Pump. PCM P0C2D:00 Electric Transmission Fluid Pump Control Module Feedback Signal Low: No Sub Type Information This DTC sets if the duty cycle is less than 10%. PCM P0C2E:00 Electric Transmission Fluid Pump Control Module Feedback Signal High: No Sub Type Information This DTC sets if the duty cycle is greater than 90%. PCM P175A:00 Transmission Fluid Over Temperature Condition - Electric Transmission Fluid Pump Disabled: No Sub Type Information This DTC sets if the E-pump communication is OK. The frequency is between 130 Hz and 170 Hz but an over temperature condition is detected (30% to 34% duty cycle). This DTC can be caused by high transmission fluid temperatures PCM P2796:00 Electric Transmission Fluid Pump Control Circuit: No Sub Type Information This DTC sets when the electric transmission oil pump reports to the TCM that it is not receiving a PWM from the TCM. Possible Sources
- Connectors damaged or pushed-out terminals, corrosion, loose wires or ground and missing or damaged seals
- BJB fuse 26 (10A)
- Electric transmission fluid pump
- PCM
- J1 CHECK THE ELECTRIC TRANSMISSION FLUID PUMP POWER CIRCUIT
- Ignition OFF.
- Disconnect Transmission Vehicle Harness C1575.
- Ignition ON.
- Measure:
Positive Lead Measurement / Action Negative Lead C1575-15 Ground
Is the voltage greater than 11 volts?
Yes GO to J4 No CHECK fuse 26 (10A), if the fuse is OK, GO to J2 If the fuse is not OK, GO to J3 - J2 CHECK THE ELECTRIC TRANSMISSION PUMP VOLTAGE CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect BJB C1035B.
Is the resistance less than 3 ohms?
Yes INSTALL a new BJB. No REPAIR the circuit - J3 CHECK THE ELECTRIC TRANSMISSION PUMP VOLTAGE CIRCUIT FOR A SHORT TO GROUND
- Ignition OFF.
- Measure:
Positive Lead Measurement / Action Negative Lead C1575-28 Ground
Is the resistance less than 3 ohms?
Yes GO to J11 No REPAIR the circuit. - J4 CHECK THE ELECTRIC TRANSMISSION PUMP GROUND CIRCUIT FOR AN OPEN
- Measure:
Positive Lead Measurement / Action Negative Lead C1575-28 Ground
Is the resistance less than 3 ohms?
Yes GO to J5 No REPAIR the circuit. - Measure:
- J5 CHECK ELECTRIC TRANSMISSION PUMP FEEDBACK MONITOR CIRCUIT FOR OPEN
- Ignition ON.
Is the resistance less than 3 ohms?
Yes GO to J6 No REPAIR the circuit. - J6 CHECK ELECTRIC TRANSMISSION FLUID PUMP FEEDBACK MONITOR CIRCUIT FOR SHORT TO GROUND
- Ignition OFF.
- Measure:
Positive Lead Measurement / Action Negative Lead C1551T-39 Ground
Is the resistance greater than 10, 000 ohms?
Yes GO to J7 No REPAIR the circuit. - J7 CHECK ELECTRIC TRANSMISSION FLUID PUMP FEEDBACK / MONITOR CIRCUIT FOR SHORT TOGETHER WITH THE POWER CIRCUITS
- Ignition ON.
- Measure:
Positive Lead Measurement / Action Negative Lead C1551T-39 C1551T-1 C1551T-39 C1551T-2 C1551T-39 C1551T-17 C1551T-39 C1551T-36 C1551T-39 C1551T-42 C1551T-39 C1551T-50 C1551T-39 C1551T-55 C1551T-39 C1551T-83 C1551T-39 C1575-15
Is the resistance greater than 10, 000 ohms?
Yes GO to J8 No REPAIR the circuit or INSTALL a new vehicle wiring harness. - J8 CHECK ELECTRIC TRANSMISSION FLUID PUMP COMMAND CIRCUIT FOR SHORT TO POWER FOR SHORT TOGETHER WITH THE POWER CIRCUITS
- Ignition OFF.
- Disconnect PCM C1551T (If not already disconnected).
- Disconnect Transmission Harness Connector C1575.
- Measure:
Positive Lead Measurement / Action Negative Lead C1551T-6 C1551T-1 C1551T-6 C1551T-2 C1551T-6 C1551T-17 C1551T-6 C1551T-36 C1551T-6 C1551T-42 C1551T-6 C1551T-50 C1551T-6 C1551T-55 C1551T-6 C1551T-83 C1551T-6 C1575-15
Is the resistance greater than 10, 000 ohms?
Yes GO to J9 No REPAIR the circuit. - J9 CHECK ELECTRIC TRANSMISSION FLUID PUMP COMMAND CIRCUIT FOR OPEN
Is the resistance less than 3 ohms?
Yes GO to J10 No REPAIR the circuit - J10 CHECK THE ELECTRIC TRANSMISSION FLUID PUMP TRANSMISSION INTERNAL WIRING HARNESS CIRCUITS FOR AN OPEN
- REMOVE main control valve body. REFER to: Main Control Valve Body .
- Disconnect Transmission Fluid Pump C146.
- Measure:
Positive Lead Measurement / Action Negative Lead
Transmission Harness Connector, component side, pin 15C146-12
Transmission Harness Connector, component side, pin 16C146-6
Transmission Harness Connector, component side, pin 22C146-11
Transmission Harness Connector, component side, pin 9C146-5
Transmission Harness Connector, component side, pin 28C146-4
Are the resistances less than 3 ohms?
Yes GO to J11 No INSTALL a new main control harness. REFER to: Main Control Valve Body . - J11 CHECK THE ELECTRIC TRANSMISSION FLUID PUMP TRANSMISSION INTERNAL WIRING HARNESS CIRCUITS FOR A SHORT TO GROUND
- Measure:
Positive Lead Measurement / Action Negative Lead
Transmission Harness Connector, component side, pin 15Ground
Transmission Harness Connector, component side, pin 16Ground
Transmission Harness Connector, component side, pin 22Ground
Transmission Harness Connector, component side, pin 9Ground
Transmission Harness Connector, component side, pin 28Ground
Are the resistances greater than 10, 000 ohms?
Yes GO to J12 No INSTALL a new main control harness. REFER to: Main Control Valve Body . - Measure:
- J12 CHECK ELECTRIC TRANSMISSION FLUID PUMP INTERNAL TRANSMISSION HARNESS FEEDBACK MONITOR CIRCUIT FOR A SHORT TOGETHER WITH THE POWER CIRCUITS
- Ignition ON.
- Measure:
Positive Lead Measurement / Action Negative Lead
Transmission component side, pin 19
Transmission component side, pin 5
Transmission component side, pin 19
Transmission component side, pin 6
Transmission component side, pin 19
Transmission component side, pin 7
Transmission component side, pin 19
Transmission component side, pin 8
Transmission component side, pin 19
Transmission component side, pin 9
Transmission component side, pin 19
Transmission component side, pin 10
Transmission component side, pin 19
Transmission component side, pin 11
Transmission component side, pin 19
Transmission component side, pin 12
Transmission component side, pin 19
Transmission component side, pin 13
Are the resistances greater than 10, 000 ohms?
Yes GO to J13 No REPAIR the circuit. - J13 CHECK ELECTRIC TRANSMISSION FLUID PUMP COMMAND CIRCUIT FOR SHORT TO GROUND
- Ignition OFF.
- Disconnect PCM C1551T (If not already disconnected).
- Disconnect Transmission Harness Connector C1575.
- Measure:
Positive Lead Measurement / Action Negative Lead
Transmission component side, pin 18Ground
Is the resistance greater than 10, 000 ohms?
Yes GO to J14 No REPAIR the circuit. - J14 CHECK TRANSMISSION INTERNAL WIRING HARNESS ELECTRIC TRANSMISSION FLUID PUMP POWER CIRCUIT FOR AN OPEN
- Ignition ON.
- Measure:
Positive Lead Measurement / Action Negative Lead
Transmission component side, pin 10C1792-1
Is the resistance less than 3 ohms?
Yes GO to J15 No INSTALL new transmission internal wiring harnesses. REFER to: Main Control Valve Body . - J15 CHECK THE TRANSMISSION INTERNAL WIRING HARNESS GROUND CIRCUIT
- Ignition OFF.
- Measure:
Positive Lead Measurement / Action Negative Lead
Transmission component side, pin 17C1792-6
Is the resistance less than 3 ohms?
Yes INSTALL a new electric transmission fluid pump. REFER to: Transmission . No INSTALL new transmission internal wiring harnesses. REFER to: Main Control Valve Body .