MECHANICAL SYSTEM TEST [GW6A-EL, GW6AX-EL]

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Special service tool (SST)

49 D019 907   Oil pressure gauge (component part for 49 D019 9A0)		49 D019 908   Gauge (component part for 49 D019 9A0)		49 D019 909   Hose (component part for 49 D019 9A0)
49 D019 910   Adapter (component part for 49 D019 9A0)		49 D019 911   Adapter (component part for 49 D019 9A0)		49 D019 913     Adapter (component part for 49 D019 9A0)

Replacement part

Mechanical System Test Preparation

1.  Apply the parking brake securely and block the front and rear wheels using wheel blocks.

2.  Inspect the engine coolant amount. (See ENGINE COOLANT LEVEL INSPECTION [SKYACTIV-D 2.2].)

3.  Inspect the engine oil amount. (See ENGINE OIL LEVEL INSPECTION [SKYACTIV-D 2.2].)

4.  Inspect the ATF amount. (See AUTOMATIC TRANSAXLE FLUID (ATF) INSPECTION [GW6A-EL, GW6AX-EL].)

5.  Inspect idle speed. (See ENGINE TUNE-UP [SKYACTIV-D 2.2].)

6.  Verify that no DTCs are stored.

Line Pressure Test

1.  Perform the mechanical system test preparation. (See Mechanical System Test Preparation.)

2.  Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.)

3.  Remove the following parts as a single unit. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)

•  Air cleaner cover

•  Air cleaner element

•  Fresh-air duct

•  Air cleaner case

•  Air hose

•  Resonance chamber

4.  Remove the bolts and set the wiring harness and wiring harness bracket in a place which does not interfere with servicing.

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5.  Remove the square head plug of the line pressure detection port.

Warning

•  Do not remove the square head plug when the ATF temperature is high. Otherwise, the ATF could overflow and cause severe burns or serious injury. Remove the square head plug when the transaxle and ATF are at a low temperature.

Note

•  Use a suitable oil pressure gauge that corresponds to the line pressure because the maximum scale value differs depending on the oil pressure gauge.

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6.  Install the SSTs (49 D019 910, 49 D019 911, 49 D019 913, 49 D019 909, 49 D019 908) to the line pressure detection port as shown in the figure.

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7.  Install the following parts as a single unit. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)

•  Air cleaner cover

•  Air cleaner element

•  Fresh-air duct

•  Air cleaner case

•  Air hose

•  Resonance chamber

8.  Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.)

9.  Start the engine.

10.  Warm up the engine until the ATF temperature is 60—70 °C {140—158 °F}.

11.  Shift the selector lever to the D position.

12.  Measure the line pressure while idling in the D position.

13.  Measure the line pressures while idling in the M (1st gear) and R positions using the same procedure.

14.  Stop the engine.

15.  Replace the low pressure gauge (49 D019 908) with the high pressure gauge (49 D019 907).

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16.  Start the engine.

17.  Measure the line pressure at the time the engine stalls in the D position.

(1)  Forcefully depress the brake pedal with the left foot.

(2)  Shift the selector lever to the D position.

Caution

•  Perform the line pressure measurement at the time the engine stalls (procedure (3) to (4)) within 5 s. Otherwise, the transaxle could be damaged.

(3)  Depress the accelerator pedal fully with the right foot.

(4)  Quickly read the line pressure when the engine stalls and release the right foot from the accelerator pedal.

(5)  Shift the selector lever to the N position and idle the engine for 1 min or more.

18.  Measure the line pressures at the time the engine stalls in positions other than D using the same procedure.

•  If there is a malfunction, the following could be considered possible causes.

Status		Possible Cause
Lower than standard	Low in R, D, M (1st gear) position	•  Oil pump wear •  ATF leakage from oil pump, control valve body, or transaxle case •  Pressure regulator valve sticking •  Pressure control solenoid valve operation malfunction •  Solenoid reducing valve sticking
	Low in D, M (1st gear) position	•  ATF leakage from low clutch hydraulic circuit
	Low in R, M (1st gear) position	•  ATF leakage from low and reverse brake hydraulic circuit
	Low in R position	•  ATF leakage from R-3-5 brake hydraulic circuit
Higher than standard	High in R, D, M (1st gear) position	•  Pressure regulator valve sticking •  Pressure control solenoid valve operation malfunction

19.  Stop the engine.

20.  Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.)

21.  Remove the following parts as a single unit. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)

•  Air cleaner cover

•  Air cleaner element

•  Fresh-air duct

•  Air cleaner case

•  Air hose

•  Resonance chamber

22.  Remove the SSTs.

Warning

•  If the SSTs are removed when the ATF temperature is high, ATF could overflow and cause severe burns or serious injury. Remove the SSTs when the transaxle and ATF are at a low temperature.

23.  Install a new square head plug.

Note

•  Do not reuse the square head plug because it is coated with sealant.

24.  Tighten the wiring harness installation bolts in the order shown in the figure.

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25.  Install the following parts as a single unit. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)

•  Air cleaner cover

•  Air cleaner element

•  Fresh-air duct

•  Air cleaner case

•  Air hose

•  Resonance chamber

26.  Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.)

Stall test

1.  Perform the mechanical system test preparation. (See Mechanical System Test Preparation.)

2.  Apply the parking brake and set the wheel blocks on both the front and rear wheels.

3.  Start the engine.

4.  Measure the stall speed in the D position.

(1)  Forcefully depress the brake pedal with the left foot.

(2)  Shift the selector lever to the D position.

Caution

•  Stall speed: Maximum stall speed during stall test

•  If a stall condition is determined in the D or M position, the control for limiting the engine speed is operated to protect the transaxle. Engine speed increases momentarily and decreases gradually during the stall test, however, this does not indicate a malfunction.

•  Perform the stall speed measurement (procedure (3) to (4)) within 5 s. Otherwise, the transaxle could be damaged.

(3)  Depress the accelerator pedal fully with the right foot.

(4)  Quickly read the engine speed (stall speed) when the speed stabilizes and release the right foot from the accelerator pedal.

(5)  Shift the selector lever to the N position and idle the engine for 1 min or more.

5.  Measure the stall speed in the M (1st gear) and R positions using the same procedure.

•  If there is a malfunction, the following could be considered possible causes.

Status		Possible Cause
Higher than standard	High in R, D, M (1st gear) position	Line pressure is low	•  Oil pump wear •  ATF leakage from oil pump, control valve body, or transaxle case •  Pressure regulator valve sticking •  TR control valve sticking •  Pressure control solenoid valve operation malfunction
		•  Low and reverse brake slippage and one-way clutch damage
	High in D, M (1st gear) position	•  Low clutch slippage •  One-way clutch damage
	High in R position	Perform road test to determine whether problem is in R-3-5 brake or low and reverse brake •  Engine braking is applied in M (1st gear) position ―  R-3-5 brake slippage •  Engine braking is not applied in M (1st gear) position ―  Low and reverse brake slippage
Lower than standard	Low in R, D, M (1st gear) position	•  Engine malfunction •  One-way clutch slippage in torque converter

Time Lag Test

1.  Perform the mechanical system test preparation. (See Mechanical System Test Preparation.)

2.  Apply the parking brake securely and block the front and rear wheels using wheel blocks.

3.  Start the engine.

4.  Measure the time lag from N position to D position.

(1)  Shift the selector lever from N position to D position with the brake pedal depressed.

(2)  Measure the time from when the selector lever is shifted to the D position and the shift shock is clearly felt.

5.  Measure the time lag from N position to D position using the same procedure.

•  If there is a malfunction, the following could be considered possible causes.

Status		Possible Cause
Shift from N position to D position	Longer than standard	•  Line pressure is low •  Low clutch slippage •  ATF leakage from low clutch hydraulic circuit •  ATF leakage from low and reverse brake hydraulic circuit •  Shift solenoid No.1 operation malfunction •  Shift solenoid No.4 operation malfunction
	Shorter than standard	•  Line pressure is high •  N-D accumulator operation malfunction •  Shift solenoid No.1 operation malfunction •  Shift solenoid No.4 operation malfunction
Shift from N position to R position	Longer than standard	•  Line pressure is low •  Low and reverse brake slippage •  R-3-5 brake slippage •  ATF leakage from R-3-5 brake hydraulic circuit •  ATF leakage from low and reverse brake hydraulic circuit •  Shift solenoid No.3 operation malfunction •  Shift solenoid No.4 operation malfunction
	Shorter than standard	•  Line pressure is high •  N-R accumulator operation malfunction •  Shift solenoid No.3 operation malfunction •  Shift solenoid No.4 operation malfunction