2010 Cadillac Truck SRX FWD V6-3.0L Page 1657

2010 Cadillac Truck SRX FWD V6-3.0L Page 1657

DTC P0651

- 5 V Reference 2 Circuit

DTC P0697

- 5 V Reference 3 Circuit

DTC P06A3

- 5 V Reference 4 Circuit

Circuit/System Description

The engine control module (ECM) has 4 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

DTCs P0641, P0651, P0697, P06A3 run continuously when the ignition is ON.

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, P0651, P0697, and P06A3 are Type A DTCs.

Conditions for Clearing the DTC

DTCs P0641, P0651, P0697, and P06A3 are Type A DTCs.

Diagnostic Aids

P0641

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

* B150 fuel tank pressure (FTP) sensor

* B17 barometric pressure (BARO) sensor, throttle inlet absolute pressure sensor

* B47B fuel rail pressure (FRP) sensor

* B1 A/C refrigerant pressure sensor

* All four B23 camshaft position sensors

P0651

The 5 V reference 2 circuit provides 5 V to the B26 crankshaft position sensor.

P0697

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

* B74 manifold absolute pressure (MAP) sensor

* B107 accelerator pedal position sensor 2

P06A3

The 5 V reference 4 circuit provides 5 V to the following sensors:

* B106 throttle position sensor

* B107 accelerator pedal position sensor 1

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