Circuit Description
This diagnostic trouble code (DTC) may set if there is an engine torque limitation caused by requested torque higher than the maximum allowable torque.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC P1845 Torque Limit Management
Conditions for Running the DTC
The engine speed is more than 40 RPM.
Conditions for Setting the DTC
The engine torque output exceeds a maximum allowable torque for 10 minutes.
Action Taken When the DTC Sets
| • | The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails. |
| • | The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records. |
Conditions for Clearing the MIL/DTC
| • | The control module turns OFF the malfunction indicator lamp (MIL) after 4 consecutive ignition cycles that the diagnostic runs and does not fail. |
| • | A current DTC, Last Test Failed, clears when the diagnostic runs and passes. |
| • | A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic. |
| • | Clear the MIL and the DTC with a scan tool. |
Test Description
The number below refers to the step number on the diagnostic table.
Step | Action | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|
Schematic Reference: Engine Controls Schematics Connector End View Reference: Engine Control Module Connector End Views or Engine Controls Connector End Views | |||||||||
1 | Did you perform the Diagnostic System Check-Engine Controls? | ||||||||
2 | Are any other DTCs set? | Go to Step 3 | |||||||
3 | Inspect for an engine vacuum leak. Did you find and correct the condition? | Go to Step 6 | Go to Step 4 | ||||||
Inspect for a parasitic load on the engine. Inspect the following components:
Did you find and correct the condition? | Go to Step 6 | Go to Step 5 | |||||||
5 | Replace the engine control module (ECM). Refer to Engine Control Module Replacement . Did you complete the replacement? | Go to Step 6 | -- | ||||||
6 |
Did the DTC fail this ignition? | Go to Step 2 | Go to Step 7 | ||||||
7 | Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed? | System OK | |||||||
