LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chevrolet >> 2007 >> Cobalt LTZ >> Repair and Diagnosis >> Steering >> Power Steering System >> Diagnostic Information and Procedures >> DTC C0845 >> Test Description
September 30: LEMON manuals is back up on a temporary server! Slowness is possible

Test Description

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

  1. 2:  This step tests if the malfunction is intermittent.
  2. 5:  This step tests if a short to ground exists in the ignition 1 voltage circuit, or in the PSCM.
DTC C0845

Step Action Yes No
Connector End Views Reference: Power Steering Connector End Views 
1 Did you perform the Diagnostic System Check - Vehicle? Go to Step 2  Go to DIAGNOSTIC SYSTEM CHECK - VEHICLE
2 
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, attempt to establish communication with the power steering control module (PSCM).
Does the scan tool communicate with the PSCM?		 Go to Step 6  Go to Step 3 
3
  1. Turn OFF the ignition.
  2. Inspect the 2 A EPS fuse for an open.
Is the fuse open?		 Go to Step 4  Go to Step 7 
4
  1. Replace the 2 A EPS fuse.
  2. Turn ON the ignition, with the engine OFF.
Does the fuse open?		 Go to Step 5  Go to Diagnostic Aids
5  Test the ignition 1 voltage circuit of the PSCM for a short to ground. Refer to Testing for Short to Ground and Wiring Repairs .
Did you find and correct the condition?		 Go to Step 11  Go to Step 10 
6 Test the ignition 1 voltage circuit for a short to voltage. Refer to Testing for a Short to Voltage and Wiring Repairs .
Did you find and correct the condition?		 Go to Step 11  Go to Diagnostic Aids
7 Test the ignition 1 voltage circuit of the PSCM for an open. Refer to Circuit Testing and to Wiring Repairs .
Did you find and correct the condition?		 Go to Step 11  Go to Step 8 
8 Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs .
Did you find and correct the condition?		 Go to Step 11  Go to Step 9 
9 Inspect for poor connections at the harness connector of the PSCM. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs .
Did you find and correct the condition?		 Go to Step 11  Go to Step 10 
10 Replace the electronic power steering (EPS) assembly. Refer to Steering Column Replacement .
Did you complete the replacement?		 Go to Step 11  -
11
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC.
Does DTC C0845 reset?		 Go to Step 2  System OK
scientia non olet · About LEMON Manuals