DTC B2795 HSV
Diagnostic Instructions
DTC Descriptor
DTC B2795: Suspension Control Select Switch Circuit
Circuit/System Description
The suspension control selection switch (mode switch) allows the driver to change
the state of the suspension from performance/luxury (LED OFF) to track/performance
(LED ON). The switch is momentary device that earths a voltage supplied by the electronic
suspension control module, the voltage is only earthed when the switched is depressed.
If the switch is held depressed for longer than 60 seconds a DTC may be set.
Conditions for Running the DTC
Ignition ON.
Conditions for Setting the DTC
The electronic suspension control module has detected that the suspension control
selection switch circuit is shorted or has an open high resistance.
Action Taken When the DTC Sets
| • | The ESC will enter the speed dependent damping mode. |
| • | Both left and right normal force outputs will be set to the default output
states. |
| • | The ESC module illuminates the LED in the ESC switch. |
Conditions for Clearing the DTC
| • | A history DTC will clear after 50 consecutive ignition cycles if the condition
for the malfunction is no longer present. |
| • | Using a Tech2 Scan tool |
Reference Information
Schematic Reference
Electronic Suspension Control Schematics
.
ESC Malfunction Indicator Lamp
When all DTC's are cleared, and the
Diagnostic System Check - Vehicle
has been performed the ESC malfunction indicator lamp
may stay illuminated for a period of up to 5 seconds when the ignition switch is moved
to the "off" position. The ESC malfunction indicator lamp should switch
off when the ignition is switched to the "on" position.
Connector End View Reference
Component Connector End Views
.
Electrical Information Reference
Scan Tool Reference
Control Module References
Circuit/System Verification
- Verify that no other DTCs are present, if any other DTCs are present diagnose
those DTCs prior to any circuit or component testing.
- Ignition ON, observe the scan tool activate the suspension control switch,
the scan tool should change state from ON to OFF as the switch is toggled.
Circuit/System Testing
- Ignition OFF, disconnect the suspension control selection switch . Ignition
ON, Test for 4.8-5.2 volts between the 5 volt reference circuit
and a known ground.
| ⇒ | If less than the specified range, test the 5 volt reference circuit for
a short to ground or an open/high resistance. If the circuit tests normal, replace
the electronic suspension control unit. |
| ⇒ | If greater than the specified range, test the 5 volt reference circuit
for a short to voltage. If the circuit tests normal, replace the electronic suspension
control unit. |
| ⇒ | Connect the suspension control selection switch harness. |
- Ignition OFF, test for less than 1.0 ohm of resistance between
the earth circuit of the suspension control selection switch and a known ground.
| ⇒ | If greater than the specified range, test the earth circuit of the service suspension
control Indicator LED for an open/high resistance. If the circuit tests normal, replace
the suspension control selection switch. |
Repair Instructions
Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.
| • | Position Sensor Replacement |
