17-56 SELF-DIAGNOSIS SYSTEM
Gear Position Sensor (Service Code 25) (DTC P0914, P0917)
Gear Position Sensor Output Voltage Inspection
Remove the gear position sensor (see Gear Position Sen-
sor Removal in the Electrical System chapter).
Measure the output voltage at the gear position sensor in
the same way as input voltage inspection, note the follow-
Connect the measuring adapter [A] between these con-
Main Harness [B]
Gear Position Sensor [C]
Digital Meter [D]
Special Tool - Measuring Adapter: 57001-1700
Gear Position Sensor Output Voltage
Connections to Adapter:
Digital Meter (+) → Y (sensor G/R) lead
Digital Meter (–) → BK (sensor G) lead
Measure the output voltage with the engine stopped and
with the connector joined.
Turn the ignition switch on.
Rotate the gear position sensor, confirm the output volt-
age will be raise or lower.
Turn the ignition switch off.
If the reading is out of the standard, replace the gear po-
If the reading is within the standard, remove the ECU and
check the wiring for continuity between main harness con-
Disconnect the ECU and sensor connectors.
Wiring Continuity Inspection
ECU Connector [A] ← →
Gear Position Sensor Connector [B]
ECU Terminal 74 [C] ←→ Sensor Terminal [D]
ECU Terminal 38 [E] ←→ Sensor Terminal [F]
If the wiring is good, check the ECU for its ground and
power supply (see ECU Power Supply Inspection in the
Fuel System (DFI) chapter).
If the ground and power supply are good, replace the ECU
(see ECU Removal/Installation in the Fuel System (DFI)
Output Voltage (V)