Multiple Systems Malfunction
Multiple Systems Malfunction
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
Diagnostic Fault Information
Circuit/System Description
The transit isolation connector enables power to be removed from certain components in the vehicle during transit, or storage, to reduce parasitic current draw. The transit isolation connector is in-line with the B+ feed to each module on this circuit.
The following components will not be powered when the Transit Isolation Connector is disconnected:
* Radio
* HVAC
* Interior Lamps
* Remote Function Actuator
* Instrument Cluster
Diagnostic Aids
The Transit Isolation Connector (X412) is disconnected at the assembly plant on every vehicle, before shipping, to reduce the battery parasitic current draw.
Reference Information
Schematic Reference
* Body Control System Schematics [1][2]Body Control Systems
* Power Distribution Schematics Power Distribution Schematics
Connector End View Reference
Component Connector End Views Fuel Pump and Level Sensor Assembly
Description and Operation
Power Mode Description and Operation Power Mode
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
Scan Tool Reference
Control Module References Control Module References for scan tool information
Circuit/System Testing
Note:
Use the schematic to identify the following:
* Control modules the vehicle is equipped with
* The control modules ground, B+, and ignition circuit terminal ID's and connectors
1. Verify DTCs B1325, B1330, B1420, B1424, B1517, C0800, C0895, C0899, C0900, P0560, P0562, or P0563 are not set.
• If any of the DTC's are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle.
Note:
The Transit Isolation Connector (X412) is disconnected at the assembly plant on every vehicle, before shipping, to reduce the battery parasitic current draw.
2. Verify that in-line harness connector X412 is connected.
• If the in-line harness connector X412 is not connected, connect in-line harness connector X412.
3. Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down. Test for less than 15 ohms between each ground circuit terminal and ground.
• If greater than the specified range, test the ground circuit for an open/high resistance.
4. If equipped, verify that a test lamp illuminates between each B+ circuit terminal and ground.
• If the test lamp does not illuminate, test the B+ circuit for an open/high resistance.
5. If equipped, Ignition ON, verify that a test lamp illuminates between each ignition circuit terminal and ground.
• If the test lamp does not illuminate, test the ignition circuit for an open/high resistance.
6. If all circuits test normal, replace the K9 body control module.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
Control Module References Control Module References for control module replacement, programming and setup