Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category |
DTC Descriptor
DTC P0615: Starter Relay Circuit MalfunctionDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Module Circuit | Low Code | Low Code | High Code | -- |
Coil Side Supply Voltage Circuit | Low Code | Low Code | -- | -- |
Circuit Description
The engine control module (ECM) supplies a ground path for the starter 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 incorrect circuit condition, a starter relay DTC P0615 will set.
Conditions for Running the DTC
System voltage is between 9 and 16 volts.
Conditions for Setting the DTC
The ECM detects an incorrect voltage level on the control or output circuit that controls the starter relay.
Action Taken When the DTC Sets
DTC P0615 is a type B DTC.
Conditions for Clearing the MIL/DTC
DTC P0615 is a type B DTC.
Diagnostic Aids
| • | Ignition system DTCs set with the ignition switch in the START position if the starter relay or the starter is inoperative. When the ECM enables starter operation. If a condition exists which prevents the engine from cranking the ECM will not receive signal input from the CKP and CMP sensors and these DTCs will set. |
| • | Reviewing the Failure Records 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. |
Reference Information
Schematic Reference
Connector End View Reference
Component Connector End Views .
Electrical Information Reference
| • | Circuit Testing . |
| • | Wiring Repairs . |
DTC Type Reference
Diagnostic Trouble Code (DTC) Type Definitions .
Scan Tool Reference
Circuit/System Verification
Ignition ON, command the Starter relay ON and OFF with a scan tool. Feel or listen to verify that the relay turns ON and OFF with each command.
Circuit/System Testing
- Ignition OFF, disconnect the Starter relay.
- Ignition ON, verify that a test lamp does not illuminate between the control terminal and a known ground.
- Ignition ON, Connect a test lamp between the control circuit terminal and a known ground.
- Connect a test lamp between the Battery + terminal and a known ground.
- Disconnect the starter motor solenoid wire at the starter motor, Connect a test lamp between the starter solenoid wire and a known ground. Connect a 10-A fusible link wire between the battery positive post and the starter motor supply circuit terminal and verify test light illuminates.
| ⇒ | If the test lamp illuminates, test the control circuit for a short to voltage. |
Command the relay ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
| ⇒ | If the test lamp is always ON, test the relay control circuit for a short to Voltage . If the circuit tests normal replace the ECM. |
| ⇒ | If the test lamp is always OFF, test the relay control circuit for a short to ground or an open/high resistance. If the circuit tests normal replace the ECM. |
| ⇒ | If the test lamp does not activate, test the Battery + for a short to ground or an open/high resistance. |
| ⇒ | If the test lamp does not activate, test the Starter motor solenoid voltage supply circuit for a short to ground or an open/high resistance. If all circuits test normal, replace the relay. |
Component Testing
- Ignition OFF, disconnect the starter relay.
- Test for 0.2 ohms of resistance between terminals 85 and 86.
- Test for infinite resistance between the following terminals: 30 and 86, 30 and 87, 30 and 85, 85 and 87.
- Test for less than 2 ohms of resistance between terminals 30 and 87A.
- Install a 5-A fusible link wire between relay terminal 85 and 12 volts. Install a jumper wire between relay terminal 86 and a known ground. Test for less than 2 ohms of resistance between terminals 30 and 87.
| ⇒ | If the resistance is not within the specified range, replace the relay. |
| ⇒ | If not the specified value, replace the relay. |
| ⇒ | If greater than the specified range, replace the relay. |
| ⇒ | If greater than the specified range, replace the relay. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
