Diagnostic Test

WARNING: This page is about a different car, the 2015 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DTC
NOTE:
Make sure the 12-Volt battery is fully charged before proceeding.

NOTE:
This DTC must be active for the results of this test to be valid.
1. Turn the ignition on.
2. With the scan tool, read DTCs and record on vehicle work order.
3. With the scan tool, erase DTCs.
4. Cycle the ignition switch from off to on.
5. With the scan tool, read EPS DTCs.
  Is the DTC active?
  
  Yes
  - Go To 2
  No
  - Test Complete.
(A950) FUSED B(+) CIRCUIT OPEN OR HIGH RESISTANCE
1. Turn the ignition off.
2. Disconnect the EPS Module C2 harness connector.
  NOTE:
  Wiggle test the wiring harness and electrical connectors while testing the circuit.
3. Using a 12-volt test light connected to ground, check the (A950) Fused B(+) circuit in the EPS Module C2 harness connector.
  NOTE:
  The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
  
  Does the test light illuminate brightly?
  
  Yes
  - Go To 3
  No
  - Repair the (A950) Fused B(+) circuit for an open or high resistance.
  - Perform the EPS VERIFICATION TEST. Refer to STANDARD PROCEDURE .
(Z926) GROUND CIRCUIT OPEN OR HIGH RESISTANCE
NOTE:
Wiggle test the wiring harness and electrical connectors while testing the circuit.
1. Using a 12-volt test light connected to 12-volts, check the (Z926) Ground circuit in the EHPS Module C1 harness connector.
  NOTE:
  The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
  
  Does the test light illuminate brightly?
  
  Yes
  - Replace and program the Electric Power Steering (EPS) Module in accordance with the Service Information. Refer to GEAR, INDEPENDENT FRONT SUSPENSION, REMOVAL .
  - Perform the EPS VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Repair the (Z926) Ground circuit for an open or high resistance.
  - Perform the EPS VERIFICATION TEST. Refer to STANDARD PROCEDURE .