DTC C0800. Cadillac XLR 2004

For 1990-2009 cars only

Makes 🢒 Cadillac 🢒 2004 🢒 XLR 🢒 DTC 🢒 DTC C0800

Circuit Description

The distance sensing cruise control (DSCC) module monitors the ignition 1 voltage circuit to determine if the voltage is within the normal operating range. When the DSCC module detects that the ignition 1 voltage is below 9.2 V or above 16 V, the DTC C0800 sets.

DTC Descriptors

This diagnostic procedure supports the following DTCs:

•	DTC C0800 Device Power 1 Circuit Voltage Below Threshold

•	DTC C0800 Device Power 1 Circuit Voltage Above Threshold

DTC Symptom	DTC Symptom Descriptor
03	Voltage Below Threshold
07	Voltage Above Threshold

Conditions for Running the DTC

C0800 03 and 07

•	Ignition is in RUN.

•	Vehicle moving at a speed greater than 40.2 km/h (25 mph).

Conditions for Setting the DTC

C0800 03

•	The DSCC module detects that the ignition 1 voltage is less than 9.2 volts.

•	The above condition is present for 7 seconds.

C0800 07

•	The DSCC module detects that the ignition 1 voltage is greater than 16 volts.

•	The above condition is present for 7 seconds.

Action Taken When the DTC Sets

C0800 03 and 07

The following actions occur:

•	Loss of DSCC function.

•	Cruise Not Ready indicator illuminates in the DIC.

Conditions for Clearing the DTC

•	The DTC becomes history when the fault is no longer present.

•	A History DTC clears after 100 malfunction free ignition cycles.

•	The DSCC module receives a clear code command from the scan tool.

Diagnostic Aids

Refer to Testing for Intermittent Conditions and Poor Connections .

Step	Action	Values	Yes	No
Schematic Reference : Cruise Control Schematics Connector End View Reference: Master Electrical Component List
1	Did you perform the Diagnostic System Check - Vehicle?	--	Go to Step 2	Go to Diagnostic System Check - Vehicle
2	Install a scan tool. Turn ON the ignition, with the engine OFF. With a scan tool, observe the Ignition 1 Voltage parameter in the distance sensing cruise control (DSCC) module data list. Does the scan tool indicate that the Ignition 1 Voltage parameter is within the specified range?	9.2-16 V	Go to Diagnostic Aids	Go to Step 3
3	Is DTC P0562, P0563 current in the powertrain control module (PCM) and/or B1325 current in the body control module (BCM)?	--	Go to Diagnostic Trouble Code (DTC) List - Vehicle	Go to Step 4
4	Turn OFF the ignition. Disconnect the DSCC module. Turn ON the ignition, with the engine OFF. Measure the voltage from the DSCC module ignition 1 voltage circuit to a good ground. Does the voltage measure greater than the specified value?	9.2 V	Go to Step 5	Go to Step 8
5	Turn ON the ignition, with the engine OFF. Measure the voltage between the DSCC module ignition 1 voltage circuit and the DSCC module ground circuit. Does the voltage measure less than the specified value?	9.2 V	Go to Step 9	Go to Step 6
6	Test the DSCC module ignition 1 voltage circuit for a short to voltage. Refer to Circuit Testing and to Wiring Repairs . Did you find and correct the condition?	--	Go to Step 11	Go to Step 7
7	Inspect for poor connections at the harness connector of the DSCC module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	--	Go to Step 11	Go to Step 8
8	Repair the high resistance in the DSCC module ignition 1 voltage circuit. Refer to Wiring Repairs . Did you complete the repair?	--	Go to Step 11	--
9	Repair the high resistance in the DSCC module ground circuit. Refer to Wiring Repairs . Did you complete the repair?	--	Go to Step 11	--
10	Replace the DSCC module. Refer to Distance Sensing Cruise Control Module Replacement . Did you complete the replacement?	--	Go to Step 11	--
11	Use the scan tool in order to clear the DTCs. Operate the vehicle within the Conditions for Running the DTC. Does the DTC reset?	--	Go to Step 2	System OK