P0615
DTC P0615
Circuit Description
The engine control module (ECM) supplies 12 volts to the control circuit of the crank relay when start enable has been requested. The ECM monitors this circuit for conditions that are incorrect for the commanded state. If the ECM detects an improper circuit condition, crank relay DTC P0615 will set.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC P0615 Starter Relay Control Circuit
Conditions for Running the DTC
System voltage is between 9 - 16 volts.
Conditions for Setting the DTC
^ The ECM detects an improper voltage level on the control circuit that controls the crank relay.
^ The condition exists for at least 2 seconds.
Action Taken When the DTC Sets
^ The ECM will not illuminate the malfunction indicator lamp (MIL).
^ The ECM will store the conditions present when the DTC set as Failure Records data only.
Conditions for Clearing the MIL/DTC
^ The history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
^ The DTC can be cleared by using the scan tool Clear DTC Information function.
Diagnostic Aids
Ignition system DTCs set with the ignition switch in the START position if the crank relay or the starter is inoperative. When the ECM enables starter operation, the ECM also initiates the diagnostic test routines for other DTCs. If a condition exists which prevents the engine from cranking, the ECM will not receive signal input from the crankshaft position (CKP) and camshaft position (CMP) sensors, and the DTCs will set.
Reviewing the Failure Records vehicle mileage since the diagnostic test last failed may assist in diagnosing the condition. The information may help determine how often the condition that set the DTC occurs.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
2. Listen for an audible click when the crank relay operates. Turn the ignition switch back and forth from the ON to START positions. Repeat this as necessary.
3. This step tests the ground circuit of the crank relay.
4. This step verifies that the ECM is providing 12 volts to the control circuit of crank relay.
5. This step tests for an open in the control circuit to the crank relay.
