2010 Cadillac CTS Sedan AWD V6-3.0L Page 1518
conditions that you observed from the Freeze Frame/Failure Records data.
Circuit/System Testing
1. Test the voltage and ground inputs to the K20 ECM for the following:
* A short
* An open
* High resistance
2. Ignition ON, observe the DTC information with a scan tool.
瀚慖f DTC P0602, P0610, or P0630 failed this ignition, program the K20 ECM. If the DTC resets, replace the K20 ECM.
3. Observe the DTC information with a scan tool. DTC P0601, P0603, P0604, P0606, P0607, P062B, P062F, P16F3, or P2610 should not set.
瀚慖f a DTC failed this ignition, replace the K20 ECM.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
Control Module References (See: Testing and Inspection/Programming and Relearning) for engine control module replacement, setup, and
programming
P0615
DTC P0615, P0616, or P0617
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions)provides an overview of each diagnostic category.
DTC Descriptors
DTC P0615
- Starter Relay Control Circuit
DTC P0616
- Starter Relay Control Circuit Low Voltage
DTC P0617
- Starter relay Control Circuit High Voltage
Diagnostic Fault Information
Circuit/System Description
When the ignition switch is placed in the START position, a discrete signal is supplied to the body control module (BCM) notifying it that the
ignition is in the START position. The BCM then sends a message to the engine control module (ECM) that crank has been requested. The ECM
then verifies that the clutch pedal is depressed or the transmission is in Park/Neutral. If it is, the ECM then supplies 12 V to the control circuit of the
starter relay. When this occurs, battery voltage is supplied through the switch of the starter relay to the starter solenoid.
Conditions for Running the DTC
* The ignition is in the START position.
* The system voltage is between 9.5-18 V.
