Sierra, Silverado 2006-2007

8.1L V8 VIN G Auto 8

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Trouble Code: P1688



Unmanaged Engine Torque Delivered to Transmission Control Module (TCM) Signal

Possible Causes:



Inspect the wiring for poor electrical connections at the TCM. Inspect for the following conditions:

A bent terminal
 
A backed-out terminal
 
A damaged terminal
 
Poor terminal tension
 
A chafed wire
 
A broken wire inside the insulation
 

When diagnosing for an intermittent short or open, massage the wiring harness while watching the test equipment for a change.You may have to drive the vehicle in order to experience a condition.
 

Trouble Code: P1689



Traction Control Delivered Torque Output Circuit

Possible Causes:

Thoroughly inspect connections or circuitry that may cause an intermittent malfunction. Refer to the following:



Testing for Electrical Intermittents
 
Testing for Intermittent Conditions and Poor Connections
 
Wiring Repairs
 
Connector Repairs
 

Trouble Code: P1751



Shift Valve 1 Performance

Possible Causes:



When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to assist in duplicating the failure conditions. Ensure the transmission fluid level is correct and there are no leaks.
 

Trouble Code: P1779



Engine Torque Delivered to Transmission Control Module (TCM) Signal

Possible Causes:



Inspect the wiring for poor electrical connections at the TCM. Inspect for the following conditions:

A bent terminal
 
A backed-out terminal
 
A damaged terminal
 
Poor terminal tension
 
A chafed wire
 
A broken wire inside the insulation
 

When diagnosing for an intermittent short or open, massage the wiring harness while watching the test equipment for a change.You may have to drive the vehicle in order to experience a condition.
 

Trouble Code: P1810



Transmission Fluid Pressure (TFP) Position Switch Circuit

Possible Causes:



Refer to the Transmission Fluid Pressure (TFP) Manual Valve Position Switch Logic table for the normal range signals and the invalid combinations. On the table, LOW is 0 volts, HI is ignition voltage.
 
Sediment in the valve body may cause improper operation of the TFP manual valve position switch. If sediment intrusion is suspected, clean the valve body and replace the TFP manual valve position switch.
 

Trouble Code: P1810



Transmission Fluid Pressure (TFP) Position Switch Circuit

Possible Causes:



Refer to the Transmission Fluid Pressure Manual Valve Position Switch Logic table for the normal range signals and the invalid combinations. On the table, LOW is 0 volts, HI is ignition voltage.
 
Sediment in the valve body may cause improper operation of the TFP manual valve position switch. If sediment intrusion is suspected, clean the valve body and replace the TFP manual valve position switch.
 

Trouble Code: P1825



Internal Mode Switch - Invalid Range

Possible Causes:



The IMS is part of a wire harness, which connects electrically to the control solenoid (w/body and TCM) valve assembly and is serviced separately from the control solenoid (w/body and TCM) valve assembly. Inspect the IMS, harness, connector, and control solenoid (w/body and TCM) valve assembly pins for metallic debris. Use the J 35616 GM-approved terminal test kit for any test that requires probing the control solenoid (w/body and TCM) valve assembly harness connector or a component harness connector.
 
Inspect for an incorrectly adjusted range selector lever cable. Refer to Range Selector Lever Cable Adjustment .
 
Inspect the manual shaft detent assembly for proper alignment with the manual shaft detent lever. The manual shaft detent roller must be centered over the detent lever and not contact the IMS actuator arm.
 

Trouble Code: P1831



Pressure Control (PC)/Shift Lock Solenoid Control Circuit Low Voltage

Trouble Code: P1832



Pressure Control (PC)/Shift Lock Solenoid Control Circuit High Voltage

Trouble Code: P1876



Up and Down Shift Enable Switch Circuit Low Voltage

Trouble Code: P1915



Internal Mode Switch Start/Wrong Range

Possible Causes:



The IMS is part of a wire harness, which connects electrically to the control solenoid (w/body and TCM) valve assembly and is serviced separately from the control solenoid (w/body and TCM) valve assembly. Inspect the IMS, harness, connector, and control solenoid (w/body and TCM) valve assembly pins for metallic debris. Use the J 35616 GM-approved terminal test kit for any test that requires probing the control solenoid (w/body and TCM) valve assembly harness connector or a component harness connector.
 
Inspect for an incorrectly adjusted range selector lever cable. Refer to Range Selector Lever Cable Adjustment .
 
Inspect the manual shaft detent assembly for proper alignment with the manual shaft detent lever. The manual shaft detent roller must be centered over the detent lever and not contact the IMS actuator arm.
 

Trouble Code: P1A00



Battery Energy Control Module Reset

Possible Causes:



For the ESCM running reset fault P1A00, this can be caused if the 12-volt battery drops below 9 volts. If this DTC is set, check if there were any instances that the 12-volt battery could have gotten low or disconnected, and if so, ignore/clear this fault if it is in history.
 

Trouble Code: P1A01



Battery Energy Control Module Long Term Memory Performance

Possible Causes:



For the ESCM running reset fault P1A00, this can be caused if the 12-volt battery drops below 9 volts. If this DTC is set, check if there were any instances that the 12-volt battery could have gotten low or disconnected, and if so, ignore/clear this fault if it is in history.
 

Trouble Code: P1A02



Battery Energy Control Module Loop Overrun

Possible Causes:



For the ESCM running reset fault P1A00, this can be caused if the 12-volt battery drops below 9 volts. If this DTC is set, check if there were any instances that the 12-volt battery could have gotten low or disconnected, and if so, ignore/clear this fault if it is in history.
 

Trouble Code: P1A03



Battery Energy Control Module Options Incorrect

Possible Causes:



For the ESCM running reset fault P1A00, this can be caused if the 12-volt battery drops below 9 volts. If this DTC is set, check if there were any instances that the 12-volt battery could have gotten low or disconnected, and if so, ignore/clear this fault if it is in history.
 

Trouble Code: P1A04



Battery Energy Control Module Programming Read Only Memory (ROM)

Possible Causes:



For the ESCM running reset fault P1A00, this can be caused if the 12-volt battery drops below 9 volts. If this DTC is set, check if there were any instances that the 12-volt battery could have gotten low or disconnected, and if so, ignore/clear this fault if it is in history.
 

Trouble Code: P1A05



Battery Energy Control Module Random Access Memory (RAM)

Possible Causes:



For the ESCM running reset fault P1A00, this can be caused if the 12-volt battery drops below 9 volts. If this DTC is set, check if there were any instances that the 12-volt battery could have gotten low or disconnected, and if so, ignore/clear this fault if it is in history.
 

Trouble Code: P1A06



Battery Energy Control Module Read Only Memory (ROM)

Possible Causes:



For the ESCM running reset fault P1A00, this can be caused if the 12-volt battery drops below 9 volts. If this DTC is set, check if there were any instances that the 12-volt battery could have gotten low or disconnected, and if so, ignore/clear this fault if it is in history.
 

Trouble Code: P1A07



Battery Energy Control Module 5-Volt Reference Circuit

Possible Causes:



For the ESCM running reset fault P1A00, this can be caused if the 12-volt battery drops below 9 volts. If this DTC is set, check if there were any instances that the 12-volt battery could have gotten low or disconnected, and if so, ignore/clear this fault if it is in history.
 

Trouble Code: P1A08



Battery Energy Control Module Stack Overrun

Possible Causes:



For the ESCM running reset fault P1A00, this can be caused if the 12-volt battery drops below 9 volts. If this DTC is set, check if there were any instances that the 12-volt battery could have gotten low or disconnected, and if so, ignore/clear this fault if it is in history.
 

Trouble Code: P1A09



Battery Energy Control Module Hybrid System Voltage

Possible Causes:



For the ESCM running reset fault P1A00, this can be caused if the 12-volt battery drops below 9 volts. If this DTC is set, check if there were any instances that the 12-volt battery could have gotten low or disconnected, and if so, ignore/clear this fault if it is in history.
 

Trouble Code: P1A24



Hybrid Battery 1 Voltage

Trouble Code: P1A2B



Hybrid Battery 2 Voltage

Trouble Code: P1A32



Hybrid Battery 3 Voltage

Trouble Code: P1A58



Hybrid Battery Pack Relay Open

Trouble Code: P1A64



Starter/Generator Control Module Reset

Trouble Code: P1A65



Starter/Generator Control Module Long Term Memory Performance

Trouble Code: P1A66



Starter/Generator Control Module Loop Overrun

Trouble Code: P1A67



Starter/Generator Control Module Options Incorrect

Trouble Code: P1A68



Starter/Generator Control Module Programming Read Only Memory (ROM)

Trouble Code: P1A69



Starter/Generator Control Module Random Access Memory (RAM)

Trouble Code: P1A6A



Starter/Generator Control Module Read Only Memory (ROM)

Trouble Code: P1A6B



Starter/Generator Control Module 5-Volt Reference Circuit

Trouble Code: P1A6C



SGCM Service Calibration Fault

Possible Causes:



This DTC may be stored as a history DTC without affecting the operation of the module. If stored only as a history DTC and not retrieved as a current DTC, do not replace the module.
 
If this DTC is retrieved as both a current and history DTC, reprogram the module.
 

Trouble Code: P1A75



Starter/Generator Control Module Coolant Temperature Sensor 2 Performance

Trouble Code: P1A76



Starter/Generator Control Module Coolant Temperature Sensor 2 Circuit Low Voltage

Trouble Code: P1A77



Starter/Generator Control Module Coolant Temperature Sensor 2 Circuit High Voltage

Trouble Code: P1A78



Starter/Generator Control Module Coolant Temperature Sensor 3 Performance

Trouble Code: P1A79



Starter/Generator Control Module Coolant Temperature Sensor 3 Circuit Low Voltage

Trouble Code: P1A7A



Starter/Generator Control Module Coolant Temperature Sensor 3 Circuit High Voltage

 
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