P0699

P0699-SENSOR REFERENCE VOLTAGE 3 CIRCUIT HIGH

For a complete wiring diagram Refer to the Wiring Information

Theory of Operation

This sensor supply circuit provides a 5-volt supply to the Accelerator Pedal Position (APPS) 1 Sensor. The ECM illuminates the MIL lamp immediately after the diagnostic runs and fails. The ETC lamp will also flash. During this time the customer will be in a limp home mode. The ECM will turn off the MIL lamp after the diagnostic runs and passes in 4 consecutive drive cycles.

- When Monitored:
While engine is running.

- Set Condition:
Voltage detected at the APPS 1 5-volt supply circuit is above a calibrated value.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Pre-Diagnostic Troubleshooting Procedure

1. ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, record all Freeze frame data.
3. With the scan tool, erase DTCs.
4. Turn the ignition off for 30 seconds.
5. Turn the ignition on.
6. With the scan tool, read DTCs.

Did the DTC reset?

Yes

- Go To 2

No

- Refer to the INTERMITTENT CONDITION - DIESEL (Diagnostic Procedure). Intermittent Condition Test

2. (K852) 5-VOLT SUPPLY SHORTED TO VOLTAGE




1. Turn the ignition off.
2. Disconnect the Accelerator Pedal Position harness connector.
3. Turn the ignition on.
4. Measure the voltage of the (K852) 5-volt Supply circuit at the Accelerator Pedal Position harness connector.

Is the voltage reading above 5.1 volts?

Yes

- Repair the short to voltage in the (K852) 5-volt Supply circuit.
- Perform POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test

No

- Go To 3

3. (F855) 5-VOLT SHORTED
1. Turn the ignition off.
2. Disconnect the ECM C2 harness connector.

NOTE: Check connectors - Clean/repair as necessary.

3. Measure the resistance between the (K852) 5-volt Supply circuit and all other circuits in the ECM C2 connector.

Is the resistance less than 10k ohms between the (K852) 5-volt Supply circuit and any of the circuits?

Yes

- Repair the short to the circuit that measured less than 10k ohms.
- Perform POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test

No

- Replace the ECM.
- Perform POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test