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Test Description

WARNING: This page is about a different car, the 2007 Pontiac G5 Pursuit, 2007 Pontiac G5, and 2007 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

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
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