P0698

DTC P0698 or P0699

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

DTC P0698
- 5-Volt Reference 3 Circuit Low Voltage

DTC P0699
- 5-Volt Reference 3 Circuit High Voltage

Diagnostic Fault Information






Circuit/System Description

These 5-volt reference circuits are independent of each other outside the engine control module (ECM), but are bussed together inside the ECM. Therefore, a circuit condition on one sensor 5-volt reference circuit may affect the other sensor 5-volt reference circuits. The ECM monitors the voltage on the 5-volt reference circuit.

Conditions for Running the DTC

* The ignition is ON.
* Diagnostics run continuously.

Conditions for Setting the DTC

P0698
* The ECM detects the 5-volt reference 3 circuit voltage is less than 4.7 volts.
* The above condition is present for 2 seconds.

P0699
* The ECM detects the 5-volt reference 3 circuit voltage is more than 5.2 volts.
* The above condition is present for 2 seconds.

Action Taken When the DTC Sets

DTCs P0698 and P0699 are Type A DTCs.

Conditions for Clearing the MIL/DTC

DTCs P0698 and P0699 are Type A DTCs.

Circuit/System Verification

Engine Starts and runs.

Circuit/System Testing

1. Turn OFF the ignition for 60 seconds or until the ECM powers down.
2. Disconnect the accelerator pedal position (APP) sensor.
3. Turn ON the ignition, with engine OFF and measure the voltage from the 5-volt reference circuit of the APP sensor 1 to a good ground with a DMM.

• If the voltage measures 4.7-5.2 volts, replace the APP sensor.

4. With the DMM still connected to the 5-volt reference circuit, disconnect all other components connected to the 5-volt reference 3, one at a time. Refer to Diagnostic Fault Information.

• If voltage changes when one of the above components are disconnected, replace the component. Refer to the appropriate replacement procedure.

5. Test the 5-volt reference 3 circuits for a short to ground or a short to voltage.

• If no problem was found in the 5-volt reference 3 circuit, replace the ECM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

* Accelerator Pedal Position Sensor Replacement
* Manifold Absolute Pressure Sensor Replacement
* Turbocharger Vane Position Sensor Replacement
* Exhaust Gas Recirculation Valve Replacement
* Control Module References for ECM replacement, setup, and programming Programming and Relearning Verification Tests