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DTC P0697 - LNP or LNQ

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 P0697 00: 5V Reference 3 Circuit

Circuit/System Description

The engine control module has three 5 V reference circuits. The ECM provides the 5 V reference to various sensors. Each reference circuit provides a 5 V reference for greater than one sensor. A short to ground or voltage on one of the 5 V reference circuits will affect all components connected to that 5 V reference circuit. The ECM monitors the voltage on the 5 V reference circuits.

Conditions for Running the DTC

    • The ignition is ON or the engine is running.
    • The ignition voltage is between 9-16 V.
    • The DTCs run continuously when the above condition is met.

Conditions for Setting the DTC

The ECM detects a voltage above 5.5 V, or below 4.5 V, on any of the 5 V reference circuits for greater than 0.5 s.

Action Taken When the DTC Sets

DTC P0697 00 is a Type B DTC.

Conditions for Clearing the DTC

DTC P0697 00 is a Type B DTC.

Diagnostic Aids

If a shared 5 V reference circuit is shorted to ground or shorted to a voltage, other 5 V reference circuits may be affected.

P0697 00

The 5 V reference 3 circuit provides 5 V to the following sensors:

    • The turbocharger vane position sensor
    • The intake airflow valve sensor
    • The exhaust gas recirculation position sensor

Reference Information

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Component Connector End Views

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. Ignition ON, observe the DTC information with a scan tool. DTC P0697 00 should not set.
  2. Operate the vehicle within the conditions for running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the freeze frame/failure records data.

Circuit/System Testing

Note: Additional DTCs will set when disconnecting the components.

  1. Ignition OFF, disconnect the harness connector at all appropriate sensors for the applicable DTC. Refer to Diagnostic Aids.
  2. Ignition ON, test for 4.6-5.4 V between the 5 V reference circuit and ground.
  3. If the voltage is less than the specified range, test the 5 V reference circuit for a short to ground. If all circuits test normal, replace the K20 Engine Control Module.
    If greater than the specified range, test the 5 V reference circuit for each component associated with the 5 V reference circuit for a short to voltage. If all circuits test normal, replace the K20 Engine Control Module.

    Note: A short to voltage on the signal circuit of certain components may cause this DTC to set.

  4. Observe the scan tool that DTC P0697 00 is not set while connecting each component associated with the 5 V reference circuit one at a time.
  5. If the DTC sets when a component is connected, test the signal circuit for a short to voltage. If all circuits test normal, replace that component.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Air Conditioning (A/C) Refrigerant Pressure Sensor Replacement
    •  Exhaust Pressure Differential Sensor Replacement
    • Control Module References for ECM replacement, setup, and programming
   


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