Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.

Vehicle in Service Mode.
Verify that DTC P0AA1, P0AA4, P0AD9, P0ADB, P0ADC, P0ADD, P0ADF, P0AE0, P0AE4, P0AE6, P0AE7 or P1EC0 is not set.
- If any of the DTCs are set
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle
- If none of the DTCs are set
Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down.
NOTE: The following setup steps must be performed exactly in order to exercise the contactors.
OPEN the driver door using outside door handle. Leave driver door OPEN.
PRESS and HOLD the brake pedal.
NOTE: The brake pedal must remain depressed throughout the remainder of the contactor steps.
Command the Hybrid/EV Battery Contactors ALL OPEN with a scan tool.
NOTE: DO NOT press the power button and enter Vehicle in Service Mode.
Disconnect the S15 Manual Service Disconnect.
Command the Hybrid/EV Battery Negative Contactor between CLOSED and ALL OPEN with a scan tool while listening for the contactor to open.
NOTE: DO NOT use the scan tool Release Control button to turn OFF any of the contactors. Once the Release Control button is pushed the Circuit/System Verification will need to be restarted from the beginning.
Verify the Hybrid/EV Battery Negative Contactor is heard opening.
NOTE: It is normal for the contactors to only make noise while opening.
- If the Hybrid/EV Battery Negative Contactor operation cannot be heard
  Refer to Circuit/System Testing, Contactor Diagnosis.
- If the Hybrid/EV Battery Negative Contactor operation is heard
Command the Hybrid/EV Battery Positive Contactor between CLOSED and ALL OPEN with a scan tool while listening for the contactor to open.
Verify the Hybrid/EV Battery Positive Contactor is heard opening.
- If the Hybrid/EV Battery Positive Contactor operation cannot be heard
  Refer to Circuit/System Testing, Contactor Diagnosis.
- If the Hybrid/EV Battery Positive Contactor operation is heard
Command the Hybrid/EV Battery Precharge Contactor between CLOSED and ALL OPEN with a scan tool while listening for the contactor to open.
Verify the Hybrid/EV Battery Precharge Contactor is heard opening.
- If the Hybrid/EV Battery Precharge Contactor operation is not heard
  Refer to Circuit/System Testing, Contactor Diagnosis.
- If the Hybrid/EV Battery Precharge Contactor operation is heard
Release scan tool control. Install the S15 manual service disconnect.
Allow Hybrid/EV powertrain control modules to enter sleep mode by performing the following:
1. Turn the Vehicle OFF.
2. Ensure the scan tool is not communicating with any control modules by returning to the Home screen.
3. Shut all doors. Do NOT depress the brake pedal or activate any vehicle controls such as the parking lights, fuel door release, etc.
4. Ensure the scan tool is accessible without having to open doors or otherwise cause control module wake-up.
5. Wait 5 minutes with the vehicle in the prescribed condition so that the modules may enter sleep mode.
  NOTE: Sleep mode is usually entered within two minutes after shutting off the vehicle.
With a scan tool, verify the Hybrid/EV Powertrain Control Module 2 has gone to sleep by ensuring communication is not present.
- If communication is present
  Repeat the previous step.
- If communication is not present
Vehicle ON. Verify the scan tool hybrid/EV powertrain control module 2 High Voltage Inverter Voltage and Hybrid/EV Battery Pack Voltage are within 10V of each other.
- If not within 10 V of each other
  Refer to Circuit/System Testing, System Bus Diagnosis.
- If within 10 V of each other
All OK.