For 1990-2009 cars

### Circuit Description

Voltage is supplied to the electronic suspension control (ESC) module in the battery positive voltage circuit and the ignition voltage circuit. The ESC module monitors the supplied voltage to determine if it is within a valid operating range.

### DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC C0895 Device Voltage

### Conditions for Running the DTC

The ignition switch is turned ON.

### Conditions for Setting the DTC

The DTC is set when the battery voltage is outside the normal range of 9-15.5 volts.

### Action Taken When the DTC Sets

Disable All Functionality

### Conditions for Clearing the MIL/DTC

• | The scan tool can be used to clear the DTC.

• | The DTC is saved as history when the ESC module no longer sees battery voltage outside the normal range of 9-15.5 volts. The DTC will clear if the fault does not return after 50 consecutive ignition cycles.

### Diagnostic Aids

DTC C0895 may set when the vehicle is placed on a battery charger, on fast charge, for a long period of time. It may also be set by an intermittent charging system malfunction.

### Test Description

The numbers below refer to the step numbers on the diagnostic table.

1. This test determines whether the malfunction is in the supply voltage or the ESC module.

2. This step checks for high resistance, a short to ground, or an open in the battery positive voltage circuit.

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
Schematic Reference: Electronic Suspension Control Schematics Connector End View Reference: Component Connector End Views
1 | Measure the voltage in the electronic suspension control (ESC) module battery positive voltage circuit. Does the voltage measure within the specified values? | 9-15.5 V | Go to Step 3 | Go to Step 2
2 | Test for high resistance, a short to ground or an open in the battery positive voltage circuit of the ESC module. Refer to Circuit Testing and Wiring Repairs. Did you find and correct the condition? | -- | Go to Step 7 | Go to Battery Inspection/Test
3 |

1. Use the scan tool in order to clear the DTCs.
2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.

Does the DTC reset?

--

Go to Step 4

Go to Step 6

4 | Inspect for poor connections at the harness connector of the ESC module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs. Did you find and correct the condition? | -- | Go to Step 7 | Go to Step 5
5 | Replace the ESC module. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | -- | Go to Step 7 | --
6 | Inspect for poor connections at the harness connector of the ESC module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs. Did you find and correct the condition? | -- | Go to Step 7 | Go to Diagnostic Aids
7 |

1. Use the scan tool in order to clear the DTCs.
2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.

Does the DTC reset?

--

Go to Step 2

System OK