Chevrolet Trax: DTC P0965-P0967
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 Descriptors
DTC P0965
Pressure Control Solenoid Valve 2 Performance
DTC P0966
Pressure Control Solenoid Valve 2 Control Circuit Low Voltage
DTC P0967
Pressure Control Solenoid Valve 2 Control Circuit High Voltage
Circuit/System Description
Pressure control solenoid valve 2 is part of the control solenoid valve
assembly which has no serviceable components. The normally low pressure control
solenoid valve 2 regulates and directs fluid pressure to the 3-5
reverse clutch regulator valve. Increasing pressure control solenoid valve 2
pressure increases pressure to the 3-
5 reverse clutch. The transmission control module (TCM) varies the current to
the pressure control solenoid
valve 2 by controlling the amount of time the low side driver is ON and OFF.
Increasing the current to the
pressure control solenoid valve 2 increases pressure control solenoid valve 2
fluid pressure by closing OFF the
solenoid valve exhaust port. Decreasing the current to the pressure control
solenoid valve 2 decreases clutch
pressure control solenoid valve 2 fluid pressure by opening the solenoid valve
exhaust port. Power to pressure
control solenoid valve 2 is supplied by the TCM through a high side driver. The
high side driver protects the
circuit and components from excessive current flow. If excessive current flow is
detected, the high side driver
will turn OFF. When the fault is corrected, the high side driver will reset.
Conditions for Running the DTC
- Engine speed is 400-7,500 RPM for 5 s.
- Ignition voltage is 9-32 V.
- Runs continuously when above conditions are met.
Conditions for Setting the DTC
P0965
TCM detects an internal electrical performance malfunction of the pressure
control solenoid valve 2 control
circuit where the measured pressure control solenoid valve 2 current does not
equal the commanded pressure
control solenoid valve 2 current for 5 s.
P0966
TCM detects a short to ground on the pressure control solenoid valve 2
control circuit for 1 s.
P0967
TCM detects an open or short to voltage on the pressure control solenoid
valve 2 control circuit for 1 s.
Action Taken When the DTC Sets
P0965
- P0965 is a Type C DTC.
- TCM freezes transmission adaptive functions on the 3-5 Reverse clutch.
P0966 or P0967
- P0966 and P0967 are Type A DTCs.
- TCM limits the transmission to 4th gear and reverse.
- TCM commands maximum line pressure.
- TCM freezes transmission adaptive functions.
- TCM forces the torque converter clutch (TCC) OFF.
- TCM forces the high side driver OFF.
- TCM inhibits Tap Up/Down function.
- TCM inhibits manual shifting of forward gears.
- TCM enables torque management.
Conditions for Clearing the DTC
- P0965 is a Type C DTC.
- P0966 and P0967 are Type A DTCs.
Reference Information
Schematic Reference
Automatic Transmission Controls Schematics (Encore, MH8 or MHB) ,
Automatic Transmission
Controls Schematics (Trax, MH8 or MHB)
Connector End View Reference
WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS -
INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT
CONNECTOR END VIEWS - INDEX - TRAX
- Inline Harness Connector End Views (Encore) , Inline Harness
Connector End Views (Trax)
Description and Operation
- Electronic Component Description
- Transmission Component and System Description
- Transmission General Description
Electrical Information Reference
- Circuit Testing
- Connector Repairs
- Testing for Intermittent Conditions and Poor Connections
- Wiring Repairs
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (LUV) ,
Powertrain Diagnostic Trouble
Code (DTC) Type Definitions (2H0)
Scan Tool Reference
Control Module References for scan tool information
Special Tools
DT-48616-10 Adapter Harness
For equivalent regional tools, refer to Special Tools .
Circuit/System Verification
- Operate the vehicle in second gear long enough to ensure at least a 3ºC
(5ºF) rise in TCM temperature,
then operate the vehicle with the transmission in Park for 5 s.
- Operate the vehicle in drive range. Allow the transmission to shift
through all forward gear ranges.
- Verify the scan tool parameters listed below do not display Malfunction:
- Pressure Control Solenoid Valve 2 Performance Test Status
- Pressure Control Solenoid Valve 2 Control Circuit Low Voltage Test
Status
- Pressure Control Solenoid Valve 2 Control Circuit High Voltage Test
Status
If Malfunction is displayed
Refer to Circuit/System Testing.
If Malfunction is not displayed
- Operate the vehicle within the Conditions for Running the DTC. You may
also operate the vehicle within
the conditions that you observed from the Freeze Frame/Failure Records data.
- Verify the DTC does not set.
If the DTC sets
Refer to Circuit/System Testing.
If the DTC does not set
- All OK.
Circuit/System Testing
NOTE: You must perform the Circuit/System Verification first.
- Ignition OFF, remove the Q8 Control Solenoid Valve Assembly.
- Verify the Q8 Control Solenoid Valve Assembly is not contaminated with
any debris and clean as
necessary. Refer to Control Solenoid Valve and Transmission Control Module
Assembly Inspection.
Repair as necessary.
- Verify the resistance is within the specified range for each solenoid
valve listed in the Control Solenoid
Valve and Transmission Control Module Assembly Inspection.
If the resistance is not within range
Replace the Q8 Control Solenoid Valve Assembly.
If the resistance is within range
- Place the Q8 Control Solenoid Valve Assembly on a clean work surface
near the transmission assembly.
- Connect the DT-48616-10 adapter harness between the vehicle harness
connector and the Q8 Control
Solenoid Valve Assembly connector. Ignition ON.
- Verify the scan tool parameters listed below do not display Malfunction:
- Pressure Control Solenoid Valve 2 Performance Test Status
- Pressure Control Solenoid Valve 2 Control Circuit Low Voltage Test
Status
- Pressure Control Solenoid Valve 2 Control Circuit High Voltage Test
Status
If Malfunction is displayed
Replace the Q8 Control Solenoid Valve Assembly.
If Malfunction is not displayed
- All OK.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
- Perform the Transmission Adaptive Values Learn following all
transmission repairs
- Control Module References for Control Solenoid Valve Assembly
replacement, programming and setup
READ NEXT:
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.
Diag
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.
Diag
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.
Diag
SEE MORE:
Preparation Procedure
NOTE:
Horizontal aim is not adjustable on this vehicle. Adjust the fog lamp as
required
using the adjusting screw above the projector lens on the outside of the front
bumper fascia. Prior to aiming the fog lamps, perform the following steps:
Completely assemble all of the co
Safety belts work for everyone,
including pregnant women. Like all
occupants, they are more likely to
be seriously injured if they do not
wear safety belts.
A pregnant woman should wear a
lap-shoulder belt, and the lap
portion should be worn as low as
possible, below the rounding,
throughout the p