DTC C1326 Battery Out of Range. Cadillac Seville 1999

For 1990-2009 cars only

Makes 🢒 Cadillac 🢒 1999 🢒 Seville 🢒 Suspension 🢒 Road Sensing Suspension (RSS) 🢒 DTC C1326 Battery Out of Range

Circuit Description

Battery voltage is supplied to the CVRSS module at connector C1, terminal B1. The CVRSS module monitors the supplied battery voltage to determine if it is within a valid operating range.

Conditions for Setting the DTC

•	DTC C1326 sets when the battery voltage is above approx. 17.5 volts.

•	DTC C1326 sets when the battery voltage falls below approx. 9.0 volts.

Conditions for Clearing the MIL/DTC

•	DTC C1326 clears when the battery voltage is less than 16.5 volts.

•	DTC C1326 clears when the battery voltage is greater than 10 volts.

Diagnostic Aids

•	DTC C1326 disables the ability to set most other CVRSS DTCs.

•	DTC C1326 may set when the vehicle is placed on a battery charger, on fast charge, for a long period of time.

Test Description

The number(s) below refer to the step number(s) on the diagnostic table.

This test determines whether the malfunction is in the charging system or the CVRSS control module.

Step	Action	Value(s)	Yes	No
1	Disconnect CVRSS control module connector C1. Measure the voltage between CVRSS control module connector C2 terminal B1 and ground. Is the voltage within the specified range?	9 V-15.5 V	Go to Step 2	Diagnose the charging system problem. Refer to Charging System Check .
2	Reconnect CVRSS control module connector C1 if the connector is disconnected. Clear the DTCs and cycle the ignition. Refer to Clearing DTCs . If the DTC returns, replace the CVRSS Control Module. If the DTC does not return, check for intermittents. Important: The controller must be calibrated. Calibrate the CVRSS service controller using the scan tool. Refer to Electronic Suspension Control Module Calibration . Is the CVRSS control module calibrated?	--	Go to Step 3	--
3	Clear the DTCs from memory. Refer to Clearing DTCs . Are the DTCs cleared from memory?	--	Go to Road Sensing Suspension Diagnostic System Check	--

Step

Action

Value(s)

Yes

Disconnect CVRSS control module connector C1.
Measure the voltage between CVRSS control module connector C2 terminal B1 and ground.

Is the voltage within the specified range?

9 V-15.5 V

Go to Step 2

Diagnose the charging system problem. Refer to Charging System Check .

Reconnect CVRSS control module connector C1 if the connector is disconnected.
Clear the DTCs and cycle the ignition. Refer to Clearing DTCs .
If the DTC returns, replace the CVRSS Control Module. If the DTC does not return, check for intermittents.

Important: The controller must be calibrated.

Calibrate the CVRSS service controller using the scan tool. Refer to Electronic Suspension Control Module Calibration .

Is the CVRSS control module calibrated?

Go to Step 3

Clear the DTCs from memory. Refer to Clearing DTCs .

Are the DTCs cleared from memory?

Go to Road Sensing Suspension Diagnostic System Check