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 VoltageDTC P0699: 5-Volt Reference 3 Circuit High Voltage
Diagnostic Fault Information
Circuit | Short to Ground | High Resistance | Open | Short to Voltage | Signal Performance |
|---|---|---|---|---|---|
APP Sensor 3 - 5-Volt Reference | P0698, P2132 | P2138 | P2132 | P0699, P2133 | -- |
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
P0698
| • | DTC P0699 is not set. |
| • | The ignition is ON for more than 2 seconds. |
| • | The battery voltage is between 10-16 volts. |
P0699
| • | DTC P0698 is not set. |
| • | The ignition is ON for more than 2 seconds. |
| • | The battery voltage is between 10-16 volts. |
Conditions for Setting the DTC
P0698
The ECM detects the 5-volt reference 3 circuit voltage is less than 4.5 volts.
P0699
The ECM detects the 5-volt reference 3 circuit voltage is more than 5.5 volts.
Action Taken When the DTC Sets
DTCs P0698 and P0699 are Type B DTCs.
Conditions for Clearing the MIL/DTC
DTCs P0698 and P0699 are Type B DTCs.
Reference Information
Schematic Reference
Connector End View Reference
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Engine starts and runs.
Circuit/System Testing
- Turn OFF the ignition for 60 seconds or until the ECM powers down.
- Disconnect the accelerator pedal position (APP) sensor.
- Turn ON the ignition, with engine OFF and measure the voltage from the 5-volt reference circuit of the APP sensor 3 to a good ground with a DMM.
- Test the 5-volt reference 3 circuits for a short to ground or a short to voltage.
| ⇒ | If the voltage measures 4.7-5.2 volts, replace the APP sensor. |
| ⇒ | 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.
| • | Control Module References for ECM replacement, setup, and programming |
