DTC P0961-P0963
Diagnostic Instructions
DTC Descriptors
DTC P0961: Line Pressure Control Solenoid Valve
System 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: Engine running,
normal operating temperature
Parameter Normal Range: OK
|
Line Pressure Control Solenoid Valve 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: Engine running,
normal operating temperature
Parameter Normal Range: OK
|
Line Pressure Control Solenoid Valve 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: Engine running,
normal operating temperature
Parameter Normal Range: OK
|
Line Pressure Control Solenoid Valve 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. 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
P0961, P0962, or P0963
• |
The engine speed is 400 RPM or greater for
5 seconds. |
• |
The ignition voltage is 9.0 volts or
greater. |
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 seconds.
P0962
The TCM detects a short-circuit to ground on the line PC
solenoid control circuit for 2 seconds.
P0963
The TCM detects an open circuit or short-circuit to voltage on
the line PC solenoid control circuit for 5 seconds.
Action Taken When the DTC Sets
P0961 or P0963
• |
DTCs P0961 and P0963 are
Type B DTCs. |
• |
The TCM freezes transmission adaptive
functions. |
• |
The TCM commands maximum line pressure. |
P0962
• |
DTC P0962 is a Type A DTC. |
• |
The TCM limits the transmission to 5th gear and
reverse. |
• |
The TCM inhibits the torque converter
clutch (TCC). |
• |
The TCM commands maximum line pressure. |
• |
The TCM freezes transmission adaptive
functions. |
• |
The TCM turns the high side driver OFF. |
• |
The TCM inhibits Tap Up/Down function. |
• |
The TCM inhibits manual shifting of forward
gears. |
• |
The TCM enables torque management. |
Conditions for Clearing the DIC/DTC
• |
DTCs P0961 and P0963 are
Type B DTCs. |
• |
DTC P0962 is a Type A DTC. |
Reference Information
Schematic Reference
Automatic Transmission Controls Schematics
Connector End View Reference
Description and Operation
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
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
- 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 display
OK.
• |
Line Pressure Control Solenoid Valve Performance
Test Status |
• |
Line Pressure Control Solenoid Valve Control
Circuit High Voltage Test Status |
• |
Line Pressure Control Solenoid Valve Control
Circuit Low Voltage Test Status |
- After performing the above steps, verify that the DTC
does not reset by operating the vehicle within the Conditions for
Running the DTC. You may also operate the vehicle within the
conditions you observe from the Freeze Frame/Failure Records data.
If the vehicle passes the Circuit/System Verification procedure,
then STOP. Do not perform the Circuit/System Testing or Component
Testing as this may result in an unnecessary part replacement.
Refer to
Testing for Intermittent Conditions and Poor Connections .
Circuit/System Testing
Note: You must perform the
Circuit/System Verification first.
- Ignition OFF, remove the Q8 control solenoid valve
assembly. Refer to
Control Solenoid Valve and Transmission Control Module Assembly
Replacement .
- Perform the
Control Solenoid Valve and Transmission Control Module Assembly
Inspection .
- Place the Q8 control solenoid valve assembly on a
clean work surface near the transmission assembly.
- Connect DT-48616-10 harness between the
vehicle wire harness X1 14-way transmission electrical
connector, and the Q8 control solenoid valve assembly electrical
connector.
- Ignition ON, verify with a scan tool the following
test status parameters display OK.
• |
Line Pressure Control Solenoid Valve Performance
Test Status |
• |
Line Pressure Control Solenoid Valve Control
Circuit High Voltage Test Status |
• |
Line Pressure Control Solenoid Valve Control
Circuit Low Voltage Test Status |
⇒ |
If any test status parameter displays Fault or
Malfunction, replace the Q8 control solenoid valve assembly. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
|