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 C0870 03: Control Module Voltage Reference Output Circuit Low VoltageDTC C0870 07: Control Module Voltage Reference Output Circuit High Voltage
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
5 V Reference | C0870 03 | C0595 05, C0600 05, C0605 05, C0670 05, C0675 05 | C0870 07 | -- |
Low Reference | -- | C0595 05, C0600 05, C0605 05, C0670 05, C0675 05 | -- | -- |
Circuit/System Description
The suspension control module supplies a 5 V reference voltage and a low reference to each body acceleration sensor and wheel acceleration sensor. The body acceleration sensors and wheel 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 and 16 V
Conditions for Setting the DTC
C0870 03
The 5 V reference voltage is less than 4.5 V for 1.5 s
C0870 07
The 5 V reference voltage is greater than 5.5 V 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
Connector End View Reference
Description and Operation
Electronic Suspension Control Description and Operation
Electrical Information Reference
| • | Circuit Testing |
| • | Wiring Repairs |
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Ignition ON, observe the scan tool Suspension Position Sensor 5V Reference parameter. The reading should be 5 V.
Circuit/System Testing
- Ignition OFF, disconnect the harness connectors at all the body acceleration sensors and wheel acceleration sensors.
- Ignition ON, test for 4.8-5.2 V between one of the 5 V reference circuits terminal 1 and ground.
- Ignition OFF, connect each component associated with the 5 V reference circuit one at a time while observing the scan tool Suspension Position Sensor 5V Reference parameter. Verify the reading is 5 V.
| ⇒ | If less than the specified range, test the 5 V reference circuit for a short to ground. If the circuit tests normal, replace the K19 Electronic Suspension Control (ESC) Module. |
| ⇒ | If greater than the specified value, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K19 Electronic Suspension Control (ESC) Module. |
| ⇒ | If not the specified value when a component is connected, test the signal circuit terminal 2 of that component for a short to voltage. If the circuit tests normal, replace the component. |
Repair Instructions
| • | Perform the Diagnostic Repair Verification after completing the diagnostic procedure. |
| • | Control Module References for suspension control module replacement, setup and programming |
