PRE-RELEASE
DTC P0961-P0963
| DTC P0961-P0963 |
| 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 P0961
Line Pressure Control Solenoid Valve Performance
DTC P0962
Line Pressure Control Solenoid Valve Control Circuit Low Voltage
DTC P0963
Line Pressure Control Solenoid Valve Control Circuit High Voltage
| Diagnostic Fault Information |
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
| Line PC Solenoid Control | P0962 | P0963 | P0963 | P0961 |
| Typical Scan Tool Data |
Line Pressure Control Solenoid Valve Performance Test Status
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
| Operating conditions: Ignition ON Parameter Normal Range: OK | ||||
| Line PC Solenoid Control | - | - | - | Fault or Malfunction |
Line Pressure Control Solenoid Valve Control Circuit Low Voltage Test Status
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
| Operating conditions: Ignition ON Parameter Normal Range: OK | ||||
| Line PC Solenoid Control | Fault or Malfunction | - | - | - |
Line Pressure Control Solenoid Valve Control Circuit High Voltage Test Status
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
| Operating conditions: Ignition ON Parameter Normal Range: OK | ||||
| Line PC Solenoid Control | - | Fault or Malfunction | Fault or Malfunction | - |
| Circuit/System Description |
The line pressure control (PC) solenoid is part of the control solenoid valve assembly, which has no serviceable components. The normally high line PC solenoid regulates and directs the PC solenoid oil pressure to the pressure regulator valve and isolator valve. Increasing line PC solenoid pressure increases transmission line pressure. The transmission control module (TCM) varies the current to the line PC solenoid through a low side driver. Decreasing the current to the line PC solenoid increases line PC solenoid oil pressure by closing OFF the solenoid exhaust port. Increasing the current to the line PC solenoid decreases line PC oil pressure by opening the solenoid exhaust port. Line PC solenoid power is supplied by the TCM through a high side driver (HSD). The HSD protects the circuit and components from excessive current flow. If excessive current flow is detected, the HSD will turn OFF. When the fault is corrected the HSD will reset.
| Conditions for Running the DTC |
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The engine speed is 400 RPM or greater for 5.0 seconds.
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The ignition voltage is 8.6 volts or greater.
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| Conditions for Setting the DTC |
P0961
The TCM detects an internal electrical malfunction of the line PC solenoid where the measured line PC solenoid current does not equal the commanded line PC solenoid current for 5.0 seconds.P0962
The TCM detects a short to ground on the line PC solenoid control circuit for 2 seconds.P0963
The TCM detects an open or a short to voltage on the line PC solenoid control circuit for 5 seconds.| Action Taken When the DTC Sets |
P0961 or P0963
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DTCs P0961 and P0963 are Type B DTCs.
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The TCM freezes transmission adaptive functions.
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The TCM commands maximum line pressure.
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P0962
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DTC P0962 is a Type A DTC.
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The TCM limits the transmission to Reverse and 5th gear operation.
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The TCM inhibits the torque converter clutch (TCC).
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The TCM commands maximum line pressure.
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The TCM freezes transmission adaptive functions.
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The TCM turns the HSD OFF.
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The TCM inhibits Tap Up/Down function.
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The TCM inhibits manual shifting of forward gears.
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The TCM enables torque management.
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| Conditions for Clearing the DIC/DTC |
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DTCs P0961 and P0963 are Type B DTCs.
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DTC P0962 is a Type A DTC.
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| Reference Information |
Connector End View Reference
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Component Connector End Views
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Inline Harness Connector End Views
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Description and Operation
Transmission General Description
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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DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Special Tools
DT-47825-20 Adapter Harness
For equivalent regional tools, refer to Special Tools .
| Circuit/System Verification |
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Engine running in Park position. Move the gear shift lever into each gear position and back into Park position. Verify with a scan tool the following test status parameters displays OK:
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Line Pressure Control Solenoid Valve Performance Test Status
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Line Pressure Control Solenoid Valve Control Circuit High Voltage Test Status
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Line Pressure Control Solenoid Valve Control Circuit Low Voltage Test Status
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After you complete the steps described above, check the diagnostic trouble code is not reset by driving the vehicle according to the conditions for running diagnostic trouble codes (DTC). You can also drive the vehicle according to the conditions you see in Freeze Frame/ Failure records. If the vehicle passes the circuit/system verification procedure, then stop. Do not perform the circuit/system test or component test as this may result in unnecessary part replacement. Refer to
Testing for Intermittent Conditions and Poor Connections
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| Circuit/System Testing |
| 1. |
Remove control solenoid valve assembly Q8 with ignition OFF. See Replacing control solenoid valve assembly and transmission control module . |
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| 2. |
Perform the
Control Solenoid Valve and Transmission Control Module Assembly Inspection
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Place the Q8 control solenoid valve assembly on a clean work surface near the transmission assembly.
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Connect the
DT-47825-20
harness between the vehicle wire harness X1 20-way transmission electrical connector, and the Q8 control solenoid valve assembly electrical connector.
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| 5. |
Ignition ON, verify with a scan tool the following test status parameters display OK:
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Line Pressure Control Solenoid Valve Performance Test Status
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Line Pressure Control Solenoid Valve Control Circuit High Voltage Test Status
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Line Pressure Control Solenoid Valve Control Circuit Low Voltage Test Status
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If any test status parameter displays Fault or Malfunction, replace the Q8 control solenoid valve assembly.
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| Repair Instructions |
| Note | ||
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Perform the
Resetting of the transmission's adaption
after all transmission repairs.
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Before replacing the TCM, perform the
Control Solenoid Valve and Transmission Control Module Assembly Inspection
.
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Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for control solenoid valve assembly replacement, setup, and programming
