Diagnostic Test

WARNING: This page is about a different car, the 2016 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DTC
1. Test drive or operate the vehicle in accordance with the when monitored and set conditions.
2. With the scan tool, read DTCs and record on the repair order.
  Is the DTC active or pending?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
CHECK THE BATTERY CONDITION
1. Turn he ignition off.
2. Using the approved Battery tester, check the Battery state of charge.
  Did the Battery pass the load test?
  
  Yes
  - Go To 3
  No
  - Replace the Battery and retest.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
CHECK THE (T760) IN-RUSH CURRENT RELAY CONTROL CIRCUIT VOLTAGE
1. Disconnect the ICR Relay harness connector.
2. Turn the ignition on.
3. Measure the voltage on the (T760) In-Rush Relay Control circuit at the ICR Relay harness connector.
  Is there any voltage present?
  
  Yes
  - Go To 4
  No
  - Refer to 5.
CHECK THE (T760) IN-RUSH RELAY CONTROL CIRCUIT FOR A SHORT TO ANOTHER VOLTAGE SUPPLY
1. Turn the ignition off.
2. Disconnect the PDC C3 harness connector.
3. Check for continuity between the (T760) In-Rush Relay Control circuit and all other circuits at the PDC C3 harness connector.
  Is there continuity between the (T760) In-Rush Relay Control circuit and any other circuit?
  
  Yes
  - Repair the short between the (T760) In-Rush Relay Control circuit and the circuit that showed continuity.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Replace the PDC in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
CHECK THE IN-RUSH CURRENT RELAY
1. Turn the ignition off.
2. Remove the (A11) Fused Battery Cable from the In-Rush Current Relay.
3. Remove the (A8) Battery Starter Feed Cable from the In-Rush Current Relay.
  NOTE:
  These are live Battery Feeds. Be careful to insulate and/or isolate the cable so that it cannot make contact with any engine ground.
4. Measure the resistance across the terminals of the In-Rush Current Relay.
  NOTE:
  The relay is normally closed when not energized and therefore not passing through the resistor inside the relay.
  
  Is the resistance below 2.0 Ohms?
  
  Yes
  - The In-Rush Current Relay is not stuck closed at this time. This may be an intermittent condition. Try energizing and de-energizing the relay several times while testing continuity across the relay to check for an intermittent stuck condition.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Replace the In-Rush Current Relay in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .