2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1553

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1553

DTC Descriptors

DTC P0641

- 5 V Reference 1 Circuit

DTC P0642

- 5 V Reference 1 Circuit Low Voltage

DTC P0643

- 5 V Reference 1 Circuit High Voltage

DTC P0651

- 5 V Reference 2 Circuit

DTC P0652

- 5 V Reference 2 Circuit Low Voltage

DTC P0653

- 5 V Reference 2 Circuit High Voltage

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 internal 5 V reference circuits. Each internal reference circuit provides external 5 V reference circuits for

more than one sensor. A short to ground or short to voltage on one external 5 V reference circuit can affect all the components connected to the

same internal 5 V reference circuit.

Conditions for Running the DTC

* The ignition is ON for greater 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 above or below a predetermined threshold for greater than 1 s or for a cumulative of 10 s.

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

The 5 V reference 1, 2, and 3 circuits provide 5 V to the following sensors:

P0641, P0642, and P0643

* Economy mode switch

* Turbocharger pressure sensor

* Secondary air injection (AIR) pressure sensor

* Engine oil pressure (EOP) sensor

* Fuel tank pressure sensor

P0651, P0652, and P0653

* All four camshaft position sensors

* Accelerator pedal position (APP) sensor 1

P0697, P0698, and P0699

* Throttle position sensor 1 and 2