PRE-RELEASE
DTC C0406
| DTC C0406 |
| 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 Descriptor |
DTC C0406 0B
Transfer Case Solenoid Valve Control Circuit High Current
| Diagnostic Fault Information |
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
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Control
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C0402 02, C0406 0B
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C0402 04
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-
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-
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Low Reference
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-
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C0402 04
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-
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-
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| Circuit/System Description |
The rear drive clutch solenoid valve is internal to the torque transfer device housing. The rear differential clutch control module supplies battery voltage to the control circuit and ground to the low reference circuit of the solenoid valve. The solenoid valve is controlled by a pulse width modulation (PWM) signal. The solenoid valve controls the hydraulic pressure to the clutch package of the torque transfer device. The locking level of the torque transfer device depends on the engagement of the clutch package.
| Conditions for Running the DTC |
The ignition is ON.
| Conditions for Setting the DTC |
| • |
The rear differential clutch control module detects a short to ground on the control circuit of the rear drive clutch solenoid valve.
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The rear differential clutch control module detects a current more than 11 A on the control circuit of the rear drive clutch solenoid valve.
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| Action Taken When the DTC Sets |
One or more of the following actions may occur:
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All-wheel drive (AWD) is disabled.
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Service Rear Axle is displayed on the driver information center.
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| Conditions for Clearing the DTC |
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The condition for setting the DTC is no longer present.
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The DTC is not detected in 40 consecutive ignition cycles.
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| Reference Information |
Schematic Reference
Rear Axle Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Rear Drive Axle 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 |
Engine running, observe the scan tool Rear Drive Clutch Status parameter. The scan tool should display TEMPORARILY LIMITED when stationary.
| Circuit/System Testing |
| Note | ||
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The rear drive clutch solenoid valve is calibrated with and is part of the rear differential clutch control module. Both components must be replaced as a matched set. |
Verify DTC C0406 is not set.
| Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for rear differential clutch control module replacement, setup, and programming
