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The ignition is ON. System voltage is 10-18 volts. Conditions for Setting the DTC The system monitors the voltage on the neutral indicator control circuit. If the system detects a voltage of 2 volts or less for 1.5 seconds when the 2 high indicator is If the system detects a voltage of 4.5 volts or more when the 2 high indicator is commanded, Action Taken When the DTC Sets The SERVICE 4WD indicator is commanded on for this DTC for the remainder of the ignition Conditions for Clearing the DTC The transfer case shift control module clears the DTC if the condition for setting the DTC is A history DTC clears after 40 consecutive warm up cycles without a fault present. History DTCs can be cleared using a scan tool. Reference Information Schematic Reference Transfer Case Control Schematics Connector End View Reference Component Connector End Views Electrical Information Reference Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections Wiring Repairs
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Transfer Case - MP 1625/1626-NQF - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Scan Tool Reference Scan Tool Data List Scan Tool Data Definitions Diagnostic Aids A short to ground on the neutral indicator control circuit will cause the neutral indicator to Circuit/System Testing Check the 12 volt reference circuit pin 2 at the transfer case shift control switch for voltage with If less than battery voltage check the 12 volt reference circuit for an open or high resistance. If the neutral indicator is on at all times check the neutral indicator control circuit for a With the ignition on shift the transmission to neutral and using transfer case output controls Repair Procedures Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Transfer Case Shift Control Switch Replacement (Without SLT) or Transfer Case Control Module References for TCSCM replacement, setup, and programming Transfer Case High/Low Clutch Reset DTC B2725
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Transfer Case - MP 1625/1626-NQF - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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 B2725 08 Active Transfer Case Mode Switch Circuit Diagnostic Fault Information Circuit/System Description The active transfer case mode switch circuit consists of 5 modes. The transfer case shift control Conditions for Running the DTC The ignition is ON. System voltage is 10.5-18 volts. Conditions for Setting the DTC The system constantly monitors the voltage on switch signal circuit. If the system detects a voltage level under 0.38 volts or greater than 4.86 volts for 60 Action Taken When the DTC Sets Circuit Short to Ground Open/High Resistance Short to Voltage Signal Invalid Active Transfer Case Mode DTC B2725 08 DTC B2725 08 DTC B2725 DTC B2725 08
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Transfer Case - MP 1625/1626-NQF - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
All shifting is disabled. The SERVICE 4WD indicator remains illuminated for the remainder of the current ignition Conditions for Clearing the DTC The transfer case shift control module clears the DTC if the condition for setting the DTC is A history DTC clears after 40 consecutive warm up cycles without a fault present. History DTCs can be cleared using a scan tool. Reference Information Schematic Reference Transfer Case Control Schematics Connector End View Reference Component Connector End Views Electrical Information Reference Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections Wiring Repairs Scan Tool Reference Scan Tool Data List Scan Tool Data Definitions Diagnostic Aids A short to ground on the neutral indicator control circuit will cause the neutral indicator to Circuit/System Testing
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Transfer Case - MP 1625/1626-NQF - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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