Buick Regal: DTC P1007 or P129D
Diagnostic Instructions
- Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
- Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
- Diagnostic Procedure Instructions provides an overview of each
diagnostic category.
DTC Descriptor
DTC P1007
Fuel Pump Driver Control Module Ignition On/Start Switch Circuit High Voltage
DTC P129D
Fuel Pump Driver Control Module Ignition On/Start Switch Circuit Low Voltage
Diagnostic Fault Information
Circuit/System Description
The fuel pump driver control module monitors the ignition voltage circuit in
order to determine if the
voltage is within the normal operating range.
Conditions for Running the DTC
- Engine is cranking or running
- The powertrain sensor relay is commanded ON
The DTCs run continuously when the above conditions are met.
Conditions for Setting the DTC
P1007
- The fuel pump driver control module ignition switch circuit voltage is
greater than a calibrated
value for 1 s.
- Requires 40 failures out of 50 samples at 0.05 s per sample.
P129D
The fuel pump driver control module ignition switch circuit voltage is less
than a calibrated value for 1
s.
Action Taken When the DTC Sets
DTC P1007 and P129D are Type B DTCs.
Conditions for Clearing the DTC
DTC P1007 and P129D are Type B DTCs.
Reference Information
Schematic Reference
Engine Controls Wiring Schematics (LTG)
Connector End View Reference
Component Connector End View Index
Component View Reference
Powertrain Component Views
Description and Operation
Fuel System Description
Electrical Information Reference
- Circuit Testing
- Connector Repairs
- Testing for Intermittent Conditions and Poor Connections
- Wiring Repairs
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
1. Verify the engine cranks.
- If the engine does not crank
Refer to Starter Solenoid Does Not Click.
- Go to next step: If the engine cranks
2. Ignition ON.
3. Verify DTC P0562 or P0563 is not set.
- If DTC P0562 or P0563 is set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle.
- Go to next step: DTC P0562 or P0563 is not set
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
data.
5. Verify the DTC does not set.
Refer to Circuit/System Testing.
- Go to next step: If the DTC does not set
6. All OK.
Circuit/System Testing
NOTE: Circuit/System Verification must be performed first or
misdiagnosis
may result.
1. Ignition OFF, all vehicle systems OFF, disconnect the harness connector at
the K111 Fuel Pump
Driver Control Module. It may take up to 2 min for all vehicle systems to power
down.
2. Ignition ON.
3. Verify a test lamp illuminates between the ignition circuit terminal 17 and
ground.
- If the test lamp does not illuminate and the circuit fuse is good
- Ignition OFF, remove the test lamp.
- Test for less than 2 Ω in the ignition circuit end to end.
- If 2 Ω or greater, repair the open/high resistance in the circuit.
- If less than 2 Ω, verify the fuse is not open and there is voltage
at the fuse.
- If the test lamp does not illuminate and the circuit fuse is open
- Ignition OFF, remove the test lamp.
- Test for infinite resistance between the ignition circuit and ground.
- If less than infinite resistance, repair the short to ground on the
circuit.
- If infinite resistance, replace the K111 Fuel Pump Driver Control
Module.
- Go to next step: If the test lamp illuminates
4. Ignition OFF, and all vehicle systems OFF, it may take up to 2 min for all
vehicle systems to
power down.
5. Verify a test lamp does not illuminate between the ignition circuit terminal
17 and ground.
- If the test lamp illuminates
Repair the short to voltage on the circuit.
- Go to next step: If the test lamp does not illuminate
6. Replace the K111 Fuel Pump Driver Control Module.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
Refer to Control Module References for control module replacement, programming
and setup.
READ NEXT:
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diag
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diag
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diag
SEE MORE:
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diagnostic Procedure Instructions provides an overview of each
diagnostic category.
DTC Descriptors
D
Special Tools
EL-38125-10 Splice Sleeve Crimping Tool
J-38125-5A Ultra Torch Special Tool
J-38125-8 Splice Sleeve Crimping Tool
For equivalent regional tools, refer to Special Tools.
WARNING: In order to reduce the risk of personal injury, loss of high
voltage
isolation to ground and higher sy