Throttle Sensor (Method With SUBARU Select Monitor)

NOTE:

Individual difference of the accelerator pedal may not be corrected sufficiently on the ECM side after the DTC was cleared or the battery was removed and installed on the vehicle. Therefore, using the Subaru Select Monitor, check that the accelerator opening angle signal indicates [100%], when the accelerator pedal is fully depressed, and then perform the inspection.
If the accelerator opening angle signal does not indicate [100%], check the accelerator pedal. Ref. to SPEED CONTROL SYSTEMS (H4DO)>ACCELERATOR PEDAL>INSPECTION .

Start the engine and wait for 10 seconds or more.
Stop the engine.
Turn the ignition switch to ON within 4 to 5 seconds. (Engine OFF)

While reading the accelerator opening angle signal and throttle sensor voltage using Subaru Select Monitor, depress the accelerator pedal to fully open and fully closed. Ref. to ENGINE (DIAGNOSTICS) (H4DO)>DATA MONITOR .

Check

When voltage is within standard values → Normal
When voltage is not within standard values → It is possible that there is a connector connection failure, harness open circuit, short circuit, or malfunction of the throttle body. Perform inspection or replacement.
If throttle sensor voltage does not change when the accelerator pedal is fully open → Go to step 5.

Throttle sensor	Accelerator pedal	Acceleration opening angle signal	Standard
Main	Not depressed (full closed)	0.0 %	Approx. 0.6 - 0.9 V
Main	Depressed (full opened)	100.0 %	Approx. 3.9 - 4.2 V
Sub	Not depressed (full closed)	0.0 %	Approx. 1.5 - 1.8 V
Sub	Depressed (full opened)	100.0 %	Approx. 4.1 - 4.4 V

If throttle sensor voltage did not change when the accelerator pedal was fully open in step 4, perform the following procedure.

Read the DTC using Subaru Select Monitor and record the DTC.
NOTE: Because a DTC is detected when inspection was performed with the connector disconnected from the TCM, this procedure is required in order to identify the detected DTC.
Turn the ignition switch to OFF.
Disconnect the ground terminal from battery sensor. Ref. to REPAIR CONTENTS>NOTE > BATTERY .
Disconnect the connector from TCM. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION(TR580)>TRANSMISSION CONTROL MODULE (TCM)>REMOVAL .

Connect the ground cord.

Tightening torque:

32.3 N.m (3.3 kgf-m, 23.8 ft-lb)

Courtesy of SUBARU OF AMERICA, INC.

Connect the ground terminal to battery sensor. Ref. to REPAIR CONTENTS>NOTE > BATTERY .
Turn the ignition switch to ON. (Engine OFF)
Using the Subaru Select Monitor, read the accelerator opening angle signal and throttle sensor voltage when accelerator pedal is fully closed and fully open. Ref. to ENGINE (DIAGNOSTICS) (H4DO)>DATA MONITOR .

Start the engine.
While reading the accelerator opening angle signal and throttle sensor voltage using Subaru Select Monitor, depress the accelerator pedal to fully open and fully closed. Ref. to ENGINE (DIAGNOSTICS) (H4DO)>DATA MONITOR .
CAUTION: When depressing the accelerator pedal to fully open, perform it in as short a time as possible, but within the range where the inspection result is not adversely affected.
NOTE:
Perform the inspection in the following conditions.
- Select lever is in "P" range.
- Parking brake activated
Check
- When voltage is within standard values → Normal
- When voltage is not within standard values → It is possible that there is a connector connection failure, harness open circuit, short circuit, or malfunction of the throttle body. Perform inspection or replacement.
After inspection, install the related parts in the reverse order of removal.
NOTE: A DTC is detected when inspection was performed with the connector disconnected from the TCM. Read the DTC and clear the memory. Ref. to COMMON (DIAGNOSTICS)>CLEAR MEMORY>OPERATION .