DTC P0715
Diagnostic Instructions
DTC Descriptor
| DTC P0715: Input Speed Sensor Circuit |
Diagnostic Fault Information
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
ISS Supply Voltage
|
P0715
|
P0715
|
-
|
P0715
|
ISS Signal
|
P0715
|
P0715
|
P0715
|
P0715
|
|
| |
Typical Scan Tool Data
Transmission ISS
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Operating Conditions: Engine running,
normal operating temperature
Parameter Normal Range: 450-7 000
RPM
|
ISS Supply Voltage
|
Out of Range
|
Out of Range
|
OK
|
ISS Signal
|
0 RPM
|
0 RPM
|
0 RPM
|
|
| |
Circuit/System Description
The input shaft speed sensor (ISS) is a hall-effect type sensor.
The ISS detects revolutions of the intermediate shaft's C2 drum. As
the C2 drum rotates, the sensor produces a signal frequency based
on the machined surface of the C2 drum. This signal is transmitted
to the Transmission Control Module (TCM). The TCM uses the ISS
signal in connection with the output speed sensor signal to control
engine torque, shift timing, and lock-up.
Conditions for Running the DTC
P0715
| • |
The ignition voltage is
10.2-15.5 V. |
| • |
The engine speed is greater
than 400 RPM for 2 s. |
| • |
The transmission is not in
emergency mode. |
| • |
TCM communication is
normal. |
Conditions for Setting the DTC
Voltage signal is less than 0.2 V or more than 2.7 V for 100 ms
over 10 times.
Action Taken When the DTC Sets
| • |
DTC P0715 is a Type A
DTC. |
| • |
The TCM freezes transmission
adaptive functions. |
| • |
The TCM turns OFF all
solenoids. |
| • |
The TCM allows the vehicle
after a stop to operate only in the second gear and "R"
range. |
Conditions for Clearing the DTC
| • |
DTC P0715 is a Type A
DTC. |
| • |
Output speed is greater than
300 RPM for more than 70 s. |
Diagnostic Aids
Damage or misalignment of the C2 drum machined teeth surface may
cause a speed sensor malfunction.
Reference Information
Schematic Reference
Automatic Transmission Controls Schematics
Connector End View Reference
Component Connector End Views
Electrical Information Reference
Description and Operation
Transmission Component and System Description
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
| 1. |
Engine idling, observe the
scan tool Transmission ISS parameter while varying the engine
speed. The Transmission ISS parameter should change with the engine
speed and not drop out. |
| 2. |
Operate the vehicle within the
Conditions for Running the DTC to verify the DTC does not reset.
You may also operate the vehicle within the conditions you observed
from the Freeze Frame/Failure Records data. |
Circuit/System Testing
Static Test
| 1. |
Ignition OFF, remove the K71
Transmission Control Module. |
| 2. |
Test for more than 1 MΩ
between the low reference circuit terminal 13 X2 and the voltage
supply circuit terminal 12 X2. |
| ⇒ |
If less than the specified range, test the wiring
harness for internal short. If the circuit tests normal, replace
the automatic transmission. |
| 3. |
Test for infinite resistance
between each terminal and the low reference circuit terminal 13 X2
and also to the voltage supply circuit terminal 12 X2. |
| ⇒ |
If less than the specified range, replace the
wiring harness. |
| 4. |
If all circuits test normal,
test or replace the K71 Transmission Control Module. Verify the DTC
does not reset. |
| ⇒ |
If the DTC resets, replace the automatic
transmission. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
|
