Pinpoint Test M : DTCS P0C2A:00, P0C2C:00, P0C2D:00, P0C2E:00, P2796:00: Notes
DTCS P0B0D:00, P0C27:00, P0C28:00, P0C29:00, P0C2A:00
Refer to Wiring Diagrams for schematic and connector information.
Normal Operation and Fault Conditions
The electronic transmission fluid auxiliary pump is used to keep the transmission engaged when the engine is stopped and the transmission is in drive. The electronic transmission fluid auxiliary 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 | Duty Cycle Range | Description |
|---|---|---|
| P0C2D | Less than 10% | Out of range Low |
| P0C27 | 10% to 15% | Pump current too Low, Speed OK |
| P0C28 | 19% to 26% | Pump Current Too High, Speed OK |
| P175A | 29% to 35% | Pump Over Temperature |
| P0C2A | 35% to 41% | Pump Stalled |
| NONE | 44% to 51% | EVERYTHING IS OK - NORMAL VALUE OF SIGNAL |
| P0B0D | 54% to 61% | Pump Over Speed - current OK |
| P0B0D | 64% to 71% | Pump Under Speed - current OK |
| P0C29 | 74% to 81% | Both Current and Speed out of range |
| P2796 | 84% to 90% | No Command received from Control Module |
| P0C2E | Greater than 90% | Duty Cycle Out of range HI - undefined |
| P0C2C | Any other value (between) | Undefined duty cycle |
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| P0B0D | 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 (54% to 61% or 64% to 71%). The transmission fluid auxiliary pump has detected a pump over or under speed condition. The current flow through the pump was within specification. |
| P0C27 | Electric Transmission Fluid Pump Motor Control Module | 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). |
| P0C28 | Electric Transmission Fluid Pump Motor Current Low | 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). |
| P0C29 | Electric Transmission Fluid Pump Motor Current High | 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. |
| P0C2A | Electric Transmission Fluid Pump Motor Stalled | This DTC sets if the PCM commands the electric transmission fluid pump motor on and does not detect a corresponding increase in pump pressure, indicating a stalled pump motor. |
| P0C2C | Electric Transmission Fluid Pump Control Module Feedback Signal Range/Performance | This DTC sets if the E-pump communication is OK. The frequency is between 130 Hz and 170 Hz but the duty cycle does not match one of the defined duty cycle ranges. |
| P0C2D | Electric Transmission Fluid Pump Control Module Feedback Signal Low | This DTC sets if the duty cycle is less than 10%. |
| P0C2E | Electric Transmission Fluid Pump Control Module Feedback Signal High | This DTC sets if the duty cycle is greater than 90%. |
| P2796 | Electric Transmission Fluid Pump Control Circuit | This DTC sets when the E-pump is not receiving a signal on it's PWM input signal from the PCM. |
Possible Sources
- Connectors damaged or pushed-out terminals, corrosion, loose wires or ground and missing or damaged seals
- BJB fuse 42 (30A)
- BJB fuse 111 (10A)
- Transmission fluid auxiliary pump
- PCM