DTC P1640
Diagnostic Instructions
DTC Descriptor
| DTC P1640 00: Control Module Power Circuit
Malfunction |
Circuit/System Description
These DTC apply to internal microprocessor integrity conditions
within the engine control module (ECM).
Conditions for Running the DTC
| • |
The DTCs run continuously once
the above condition is met. |
Conditions for Setting the DTC
The ECM detects an internal EEPROM failure.
Action Taken When the DTC Sets
DTC P1640 is a Type A DTCs.
Conditions for Clearing the DTC
DTC P1640 is a Type A DTCs.
Reference Information
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Circuit/System Testing
| 1. |
Observe the Freeze
Frame/Failure Records with a scan tool. |
| 2. |
Clear the DTCs with a scan
tool. |
| 3. |
Ignition OFF for 30 s.
|
| 4. |
Operate the vehicle within the
Conditions for Running the DTC. You may also operate the vehicle
within the conditions that you observed from the Freeze
Frame/Failure Records. |
| ⇒ |
If DTC P1640 failed this ignition, replace the K20
Engine Control Module. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
Control Module References for ECM replacement, setup, and
programming
|
