Diagnostic Trouble Code (DTC) Detecting Criteria (H4SO): Overview

ECM OPERATION AT DTC SETTING

Memorize the freeze frame data. (For test mode $02)

Memorize the freeze frame data. (For test mode $02)
Memorize the diagnostic value and trouble standard value. (For test mode $06)

Memorize the freeze frame data. (For test mode $02)
Memorize the diagnostic value and trouble standard value. (For test mode $06)

Memorize the freeze frame data. (For test mode $02)

Memorize the freeze frame data. (For test mode $02)
Memorize the diagnostic value and trouble standard value. (For test mode $06)

COMPONENT DESCRIPTION

Atmospheric pressure sensor is built in ECM.

Scheme 341

Scheme 341: ENABLE CONDITION

Memorize the freeze frame data. (For test mode $02)

Memorize the freeze frame data. (For test mode $02)
Memorize the diagnostic value and trouble standard value. (For test mode $06)

Memorize the freeze frame data. (For test mode $02)

Memorize the freeze frame data. (For test mode $02)
Memorize the diagnostic value and trouble standard value. (For test mode $06)

Memorize the freeze frame data. (For test mode $02)
Memorize the diagnostic value and trouble standard value. (For test mode $06)

Memorize the freeze frame data. (For test mode $02)
Memorize the diagnostic value and trouble standard value. (For test mode $06)

Memorize the freeze frame data. (For test mode $02)

Memorize the freeze frame data. (For test mode $02)
Memorize the diagnosis value and trouble standard value. (For test mode $06)

Memorize the freeze frame data. (For test mode $02)
Memorize the diagnosis value and trouble standard value. (For test mode $06)

Memorize the freeze frame data. (For test mode $02)
Memorize the diagnostic value and trouble standard value. (For test mode $06)

Memorize the freeze frame data. (For test mode $02)

Inhibitor switch ensures the safety at engine start. This switch is installed to the right side of transmission case, and operated by selector lever. When the selector lever is in the "P" or "N" range, the engine will start because the electric circuit in inhibitor switch is closed and the starter circuit is connected. When the selector lever is in the "R", "D", "3", "2" or "1" range, the electric circuit in inhibitor switch is open; therefore, the engine cannot be cranked. In the "R" range, the back-up light will illuminate because the back-up light circuit in the switch is connected. In addition to the functions above, the inhibitor switch has the circuit which detects the selected range position at the present and transmits the range signal to the TCM.

Scheme 342

Scheme 342: ENABLE CONDITION

Scheme 343

Enable condition A
Enable condition B

Memorize the freeze frame data. (For test mode $02)

ATF temperature sensor is installed to the hydraulic control valve body of transmission as a unit with transmission harness. This sensor detects ATF temperature and outputs it as electric resistance signal.

Scheme 344

Scheme 344: ENABLE CONDITION

Memorize the freeze frame data. (For test mode $02)

Torque converter turbine speed sensor (output shaft speed sensor) is installed to the outside of transmission case. This sensor detects the turbine speed of torque converter by the peripheral speed of high clutch drum connected to input shaft. And then it transmits the sine wave signal (32 pulses per rev.) to TCM. TCM calculates the ratio of the input shaft speed to vehicle speed, and then makes a judgment whether to shift or not.

Scheme 345

Scheme 345: ENABLE CONDITION

Memorize the freeze frame data. (For test mode $02)

This vehicle speed sensor (output shaft speed sensor) is installed to the outside of transmission case.

This sensor detects the front wheel speed, and transmits the sine wave signal (16 pulses per rev.) to TCM.

TCM converts the signal to pulse signal, and transmits to both of the ECM and the combination meter.

Scheme 346

Scheme 346: ENABLE CONDITION

Memorize the freeze frame data. (For test mode $02)

Engine speed sensor is installed to the outside of engine body and crank part. This sensor detects the crank speed, and transmits the sine wave signal (2 pulses per rev.) to TCM.

Scheme 347

Scheme 347: ENABLE CONDITION

Memorize the freeze frame data. (For test mode $02)

Lock-up duty solenoid is installed to the transmission hydraulic control valve body. The duty ratio is controlled by the signal from TCM. This allows the lock-up clutch to be connected or released smoothly by controlling the lock-up control valve.

Scheme 348

Scheme 348: ENABLE CONDITION

Memorize the freeze frame data. (For test mode $02)

Line pressure duty solenoid is installed to the transmission hydraulic control valve body. The duty ratio is controlled by the signal from TCM. This allows controlling the pressure modifier valve and accumulator control valve A, and allows the line pressure to be adjusted to the pressure appropriate for driving condition.

Scheme 349

Scheme 349: ENABLE CONDITION

Memorize the freeze frame data. (For test mode $02)

Shift solenoid 1 Shift solenoid is installed to the transmission hydraulic control valve body. This solenoid is switched on or off by the signal from TCM. Gear positions will change depending on the solenoid condition which is ON or OFF.

Scheme 350

Scheme 350: ENABLE CONDITION

Memorize the freeze frame data. (For test mode $02)

Shift solenoid 2 Shift solenoid is installed to the transmission hydraulic control valve body. This solenoid is switched on or off by the signal from TCM. Gear positions will change depending on the solenoid condition which is ON or OFF.

Scheme 351

Scheme 351: ENABLE CONDITION

Memorize the freeze frame data. (For test mode $02)

Low clutch timing solenoid Low clutch timing solenoid is installed to the transmission hydraulic control valve body. This solenoid is switched on or off by the signal from TCM. This allows controlling the low clutch timing valve B and reverse inhibitor valve.

Scheme 352

Scheme 352: ENABLE CONDITION

Memorize the freeze frame data. (For test mode $02)

2-4 brake duty solenoid is installed to the transmission hydraulic control valve body. The duty ratio is controlled by the signal from TCM. This solenoid decreases the change gear shock by adjusting the 2-4 brake pressure during 2-4 brake operation.

Scheme 353

Scheme 353: ENABLE CONDITION

Memorize the freeze frame data. (For test mode $02)

2-4 brake timing solenoid is installed to the transmission hydraulic control valve body. This solenoid is switched on or off by the signal from TCM. This allows controlling the 2-4 brake timing valve B and decreases the change gear shock.

Scheme 354

Scheme 354: ENABLE CONDITION

Memorize the freeze frame data. (For test mode $02)

Atmospheric pressure sensor is built in ECM.

Scheme 355

Scheme 355: ENABLE CONDITIONS

Memorize the freeze frame data. (For test mode $02)

Atmospheric pressure sensor is built in ECM.

Scheme 356

Scheme 356: ENABLE CONDITIONS

Memorize the freeze frame data. (For test mode $02)

Memorize the freeze frame data. (For test mode $02)
Memorize the diagnostic value and trouble standard value. (For test mode $06)

Memorize the freeze frame data. (For test mode $02)

Diagnostic Trouble Code (DTC) Detecting Criteria (H4SO): Overview Subaru Outback BP

ECM OPERATION AT DTC SETTING

COMPONENT DESCRIPTION

Scheme 341

Scheme 342

Scheme 343

Scheme 344

Scheme 345

Scheme 346

Scheme 347

Scheme 348

Scheme 349

Scheme 350

Scheme 351

Scheme 352

Scheme 353

Scheme 354

Scheme 355

Scheme 356

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