* Low or cavitating automatic transmission fluid
* Poor terminal connection or wiring degradation
* External indication of ATFP pump motor damage
锟斤拷If none of the conditions are observed, replace the ATFP motor/pump assembly and the ATFP control module.
Current Fault
This display indicates an internal ATFP control module fault exists, no external circuits are involved. Replace the ATFP control module.
Unable to Start
1. This display indicates the ATFP control module has monitored motor current of more than 20 A during motor start-up.
2. Inspect for the following conditions:
* Automatic transmission fluid pressure trapped internally
* Poor terminal connection or wiring degradation
* External indication of ATFP pump motor damage
锟斤拷If none of the conditions are observed, replace the ATFP motor/pump assembly and the ATFP control module.
No PWM Response
This display indicates the HPCM does not detect the ATFP Control Feedback circuit signal. Refer to DTC P0C2B (See: P Code Charts/P0C2B).
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Control Module References (See: Testing and Inspection/Programming and Relearning)for PIM or ATFP control module replacement,
setup, and programming
* Auxiliary Fluid Pump and Gasket Replacement (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Fluid Pump/Service
and Repair/Auxiliary Fluid Pump and Gasket Replacement)
P3400
DTC P3400
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptor
DTC P3400
- Cylinder Deactivation System Performance
Diagnostic Fault Information
Circuit/System Description
