2010 Cadillac Truck SRX AWD V6-3.0L Page 823
Conditions for Running the DTC
C0408 02, C0408 42, C0408 43 and C0408 4B
* The ignition is ON.
* Vehicle is equipped with electronic limited slip differential.
* The test runs during start up of the rear differential clutch control module.
C0408 04
* The ignition is ON.
* Vehicle is equipped with electronic limited slip differential.
* The test runs with a frequency of 200 Hz.
C0408 61
* Vehicle is equipped with electronic limited slip differential.
* Engine running.
* Test runs when requested torque is less than 25 Nm (18 lb ft) and the calculated temperature is in the range of 0-120掳C (32-248掳F).
Conditions for Setting the DTC
C0408 02
Voltage is applied to the rear differential clutch solenoid valve. An error is detected if the current is greater than the current which corresponds to
less than 2.1 ohm resistance in the solenoid valve.
C0408 04
The measured current deviates from the nominal value with more than 200 mA for more than 100 ms.
C0408 42 and C0408 43
The rear differential clutch solenoid valve calibration values stored in the rear differential clutch control module EEPROM are invalid or out of
range.
C0408 4B
There are no rear differential clutch solenoid valve calibration values stored in the differential clutch control module EEPROM.
C0408 61
An error is detected if the rear differential clutch solenoid valve is not engaging adequately over a predetermined test sequence.
Action Taken When the DTC Sets
One or more of the following actions may occur:
* All-wheel drive (AWD) is disabled
* Service Rear Axle is displayed on the driver information center.
Conditions for Clearing the DTC
* The condition for setting the DTC is no longer present.
* The DTC is not detected in 40 consecutive ignition cycles.
Diagnostic Aids
The rear differential clutch solenoid valve harness and differential clutch pump harness are all one assembly as part of the differential clutch pump.
These harnesses should not be repaired and should be replaced if a wiring condition exists.
Reference Information
Schematic Reference
Rear Axle Schematics (See: Transmission and Drivetrain/Differential Assembly/Diagrams/Electrical Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)
Description and Operation
Rear Drive Axle Description and Operation (See: Transmission and Drivetrain/Differential Assembly/Description and Operation)
Electrical Information Reference
