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
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 |
