C0870
DTC C0870
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.
DTC Descriptors
DTC C0870 03
-
Control Module Voltage Reference Output Circuit Low Voltage
DTC C0870 07
-
Control Module Voltage Reference Output Circuit High Voltage
Diagnostic Fault Information
Circuit/System Description
The suspension control module supplies a 5 V reference voltage and a low reference to each body acceleration sensor and vertical suspension acceleration sensor. The body acceleration sensors and vertical suspension acceleration sensors supply a signal of 0.5-4.5 V to the suspension control module.
Conditions for Running the DTC
System voltage is between 9-16 V.
Conditions for Setting the DTC
C0870 03
The suspension control module detected a short to ground on the 5 V reference circuit for 1.5 s.
C0870 07
The suspension control module detected a short to voltage on the 5 V reference circuit for 1.5 s.
Action Taken When the DTC Sets
* The electronic suspension control is disabled for the duration of the ignition cycle.
* The driver information center displays the SERVICE SUSPENSION SYSTEM message.
Conditions for Clearing the DTC
* A present DTC will clear on the next consecutive malfunction-free ignition cycle.
* A history DTC will clear after 41 consecutive malfunction-free ignition cycles.
Reference Information
Schematic Reference
Electronic Suspension Control Schematics Electrical Diagrams
Connector End View Reference
Component Connector End Views Sunshade - Left
Description and Operation
Electronic Suspension Control Description and Operation Description and Operation
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 Verification
Ignition ON, observe the scan tool Suspension Position Sensor 5 V Reference parameter. The parameter should be 4.8-5.2 V.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connectors at all 5 vertical body and suspension acceleration sensors.
2. Ignition ON, test for 4.8-5.2 V between any one of the 5 V reference circuits terminal and ground.
• If less than the specified range, test all of the 5 V reference circuits for a short to ground. If the circuits test normal, replace the K19 Suspension Control Module.
• If greater than the specified range, test all of the 5 V reference circuits for a short to voltage. If the circuits test normal, replace the K19 Suspension Control Module.
3. Test for 4.8-5.2 V between all 5 vertical body and suspension acceleration sensor signal circuits terminals and ground.
• If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K19 Suspension Control Module.
• If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K19 Suspension Control Module.
4. Reconnect each acceleration sensor, one at a time, cycling the ignition OFF and then ON between each connection while observing the scan tool Suspension Position Sensor 5 V Reference parameter. Verify the parameter is between 4.8-5.2 V.
• If not within the specified range when a particular acceleration sensor is connected, replace that sensor.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Electronic Suspension Body Front Vertical Accelerometer Replacement - Upper Electronic Suspension Body Front Vertical Accelerometer Replacement - Upper
* Electronic Suspension Wheel Front Vertical Accelerometer Replacement - Lower Electronic Suspension Wheel Front Vertical Accelerometer Replacement - Lower
* Electronic Suspension Rear Position Sensor Replacement Service and Repair
* Control Module References Control Module References for suspension control module replacement, programming, and setup