GM Service Manual Online
For 1990-2009 cars only

Diagnostic Instructions

    • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    • Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    •  Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC C0696 00: Position Sensor Overcurrent

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

Left Rear Strut Position Sensor 5-Volt Voltage Reference

C0696 00

C0625 08

C0696 00

--

Left Rear Strut Position Sensor Signal

C0625 08

C0625 08

C0625 08

C0625 55

Left Rear Strut Position Sensor Low Reference

--

C0625 08

--

--

Right Rear Strut Position Sensor 5-Volt Voltage Reference

C0696 00

C0630 08

C0696 00

--

Right Rear Strut Position Sensor Signal

C0630 08

C0630 08

C0630 08

C0630 55

Right Rear Strut Position Sensor Low Reference

--

C0630 08

--

--

Circuit Description

The air suspension adjusts the vehicle suspension ride height. The air suspension control module (ASCM) determines the height of the vehicle based on the signal from the rear height sensors which are supplied a 5-volt reference voltage from the module. The ASCM raises and lowers the vehicle in order to keep the vehicle level.

Conditions for Running the DTC

Battery voltage is between 9-16 volts.

Conditions for Setting the DTC

The air suspension module detects that the supplied 5-volt reference voltage circuit for both suspension position sensors falls below 4.75 volts or exceeds 5.25 volts.

Action Taken When the DTC Sets

    • The air suspension system will be inoperative.
    • The SERVICE SUSPENSION SYSTEM message will be displayed.

Conditions for Clearing the MIL/DTC

    • When the fault is no longer present, DTC C0696 will change from a current DTC to a history DTC on the next ignition cycle.
    • DTC C0696 will be cleared from history after 50 ignition cycles.

Reference Information

Schematic Reference

Air Suspension Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Air Suspension Description and Operation

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Testing

  1. Ignition OFF, disconnect both suspension position sensors.
  2. Test for less than 2.0 ohms between suspension position sensor low reference terminal 3 (LR) and terminal 1 (RR) and ground.
  3. If greater than the specified range, test the low reference circuit for an open or high resistance. If all circuits test normal, replace the air suspension control module.
  4. Ignition ON, test for 4.8-5.2 volts between the sensor 5-volt reference circuit terminal 1 (LR) and terminal 3 (RR) of the harness connectors and ground.
  5. If less that the specified range, test the 5-volt reference circuit for open/high resistance or a short to ground. If the circuit tests normal, replace the air suspension control module.
    If greater that the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the air suspension control module.
  6. Ignition OFF, reconnect the LR suspension position sensor.
  7. Ignition ON, test for 4.75-5.25 volts exists between the RR position sensor 5-volt reference circuit terminal 3 and ground.
  8. If less than the specified range, test or replace the LR suspension position sensor.
  9. Test or replace RR suspension position sensor that is not connected.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Air Spring Leveling Sensor Replacement
    •  Suspension Position Calibration
    •  Control Module References for air suspension control module replacement, setup and programming