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DTC P0697Diagnostic Instructions
DTC DescriptorDTC P0697 00: 5V Reference 3 Circuit MalfunctionCircuit/System DescriptionThe engine control module has three 5-volt reference circuits. The ECM provides the 5-volt reference to various sensors. Each reference circuit provides a 5-volt reference for greater than one sensor. A short to ground or voltage on one of the 5-volt reference circuits will affect all components connected to that 5-volt reference circuit. The ECM monitors the voltage on the 5-volt reference circuits. Conditions for Running the DTC
Conditions for Setting the DTCThe control module detects a voltage above 5.5 V, or below 4.5 V, on any of the 5-volt reference circuits for greater than 0.5 s. Action Taken When the DTC Sets
Conditions for Clearing the DTCDTC P0697 is a Type B DTC. Diagnostic AidsIf a shared 5-volt reference circuit is shorted to ground or shorted to a voltage, other 5-volt reference circuits may be affected. P0697The 5-volt reference 3 circuit provides 5 V to the Glow Plug/Pressure Sensor Assembly. Reference InformationSchematic ReferenceConnector End View ReferenceElectrical Information ReferenceDTC Type ReferencePowertrain Diagnostic Trouble Code (DTC) Type Definitions Scan Tool ReferenceControl Module References for scan tool information Circuit/System Verification
Circuit/System Testing
Note: Additional DTCs will set when disconnecting the components. If the voltage is less than the specified range, test the 5-volt 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-volt reference circuit for each component associated with the 5-volt 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. If the DTC sets when a component is connected, test the signal circuit for a short to voltage. If all circuits test normal, replace the component. Repair InstructionsPerform the Diagnostic Repair Verification after completing the diagnostic procedure. Control Module References for ECM replacement, setup, and programming |
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