DTC C0870
| DTC C0870 |
| Diagnostic Instructions |
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Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
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Review
Strategy Based Diagnosis
for an overview of the diagnostic approach.
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Diagnostic Procedure Instructions
provides an overview of each diagnostic category.
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| 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 | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
| 5V 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 verticle suspension acceleration sensor. The body acceleration sensors and verticle 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 |
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The electronic suspension control is disabled for the duration of the ignition cycle.
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The driver information center displays the SERVICE SUSPENSION SYSTEM message.
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| Conditions for Clearing the DTC |
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A present DTC will clear on the next consecutive malfunction-free ignition cycle.
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A history DTC will clear after 41 consecutive malfunction-free ignition cycles.
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| Reference Information |
Schematic Reference
Electronic Suspension Control Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Electronic Suspension Control Description and Operation
Electrical Information Reference
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Circuit Testing
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Connector Repairs
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Testing for Intermittent Conditions and Poor Connections
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Wiring Repairs
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Scan Tool Reference
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.
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| 2. |
Ignition ON, test for 4.8-5.2 V between any one of the 5 V reference circuits terminal and ground.
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| 3. |
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.
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| 4. |
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.
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| 5. |
Test for 4.8-5.2 V between all 5 vertical body and suspension acceleration sensor signal circuits terminals and ground.
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| 6. |
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.
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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.
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| 8. |
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.
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| 9. |
If not within the specified range when a particular acceleration sensor is connected, replace that sensor.
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| Repair Instructions |
Perform the Diagnostic Repair Verification after completing the repair.
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Electronic Suspension Front Vertical Accelerometer Replacement - Upper
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Electronic Suspension Front Vertical Accelerometer Replacement - Lower
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Electronic Suspension, Vertical Accelerometer Replacement - Rear
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Control Module References
for suspension control module replacement, setup, and programming
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