2010 Cadillac CTS Sedan AWD V6-3.0L Page 1549

2010 Cadillac CTS Sedan AWD V6-3.0L Page 1549

DTC P0697

- 5 V Reference 3 Circuit

DTC P0698

- 5 V Reference 3 Circuit Low Voltage

DTC P0699

- 5 V Reference 3 Circuit High Voltage

Circuit/System Description

The engine control module (ECM) has 3 5 V reference circuits. The ECM provides the 5 V reference to various sensors. Each reference circuit

provides a 5 V reference for more than one sensor. An open, short to ground, or short voltage on one of the 5 V reference circuits can affect all the

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 for more than 3 s.

* DTCs P0641, P0642, P0643, P0651, P0652, P0653, P0697, P0698, and P0699 run continuously when the above condition is met.

Conditions for Setting the DTC

The 5 V reference circuit voltage is greater or less than a predetermined threshold.

Action Taken When the DTC Sets

DTCs P0641, P0642, P0643, P0651, P0652, P0653, P0697, P0698, and P0699 are Type A DTCs.

Conditions for Clearing the DTC

DTCs P0641, P0642, P0643, P0651, P0652, P0653, P0697, P0698, and P0699 are Type A DTCs.

Diagnostic Aids

DTC P0641, P0642, and P0643

The 5 V reference 1 circuit provides 5 V to the following sensors:

* B150 fuel tank pressure sensor

* B25B clutch pedal position sensor, if equipped

* B37B engine oil pressure sensor

* B1 A/C refrigerant pressure sensor

DTC P0651, P0652, and P0653

The 5 V reference 2 circuit provides 5 V to the following sensors:

* All four B23 camshaft position sensors

* B107 accelerator pedal position (APP) sensor 1

DTC P0697, P0698, and P0699

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

* B106 throttle position sensor 1 and 2

* B26 crankshaft position sensor

* B107 accelerator pedal position (APP) sensor 2

* B47B fuel rail pressure sensor

瀚慖f the condition is intermittent, move the related harnesses and connectors with the engine operating. Monitor the scan tool 5 V Reference

Circuit Test Status parameters for the affected components. The circuit test status parameter will change from OK or Not Run to Fault if

there is a condition with the circuit or a connection.

Reference Information

Schematic Reference

Engine Controls Schematics (LLT) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)Engine Controls Schematics

(LF1) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)

Connector End View Reference