SLOW ENGAGING AFTER OPERATING SELECTOR LEVER FROM N TO D POSITION [GW6A-EL]

id050318104500

TROUBLESHOOTING ITEM

Slow engaging after operating selector lever from N to D position

DESCRIPTION

•  When depressing the accelerator pedal just after operating the selector lever from N to D position with the ATF temperature at 60 °C {140 °F} or more, it takes 3 s or more to engage.

•  Malfunction symptom only occurs once when accelerating from a standstill.

•  Engagement after operating the selector lever from N to R position is normal.

POSSIBLE CAUSE

1.  Insufficient TCM learning (Insufficient learning in N to D position)

2.  Low clutch piston malfunction

3.  Low clutch hydraulic system sealing malfunction

4.  Control valve body malfunction

TROUBLESHOOTING ITEM	Slow engaging after operating selector lever from N to D position
DESCRIPTION	• When depressing the accelerator pedal just after operating the selector lever from N to D position with the ATF temperature at 60 °C {140 °F} or more, it takes 3 s or more to engage. • Malfunction symptom only occurs once when accelerating from a standstill. • Engagement after operating the selector lever from N to R position is normal.
POSSIBLE CAUSE	1. Insufficient TCM learning (Insufficient learning in N to D position) 2. Low clutch piston malfunction 3. Low clutch hydraulic system sealing malfunction 4. Control valve body malfunction

Diagnostic Procedure

Step

Inspection

Results

Action

1

VERIFY DTCs

•  Are any DTCs detected?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

(See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (GW6A-EL)].)

No

Go to the next step.

2

PERFORM INITIAL LEARNING AND N TO D RANGE LEARNING

1.  Perform the initial learning.
(See INITIAL LEARNING [GW6A-EL].)

2.  Perform the N to D position learning using the following procedure:

(1) Set the ATF temperature to 30 °C {86 °F} or more.

(2) Shift the selector lever to N position.

(3) Shift the selector lever to D position and wait for 5 s or more.

(4) Shift the selector lever to N position and wait for 5 s or more.

(5) Perform steps (3) to (4) 10 times.

•  Has the malfunction symptom been eliminated?

Yes

Complete the symptom troubleshooting.

No

Go to the next step.

3

VERIFY IF MALFUNCTION CAUSE IS CONTROL VALVE BODY

•  Inspect the value at the following TCM PIDs using the M-MDS.
(See ON-BOARD DIAGNOSTIC SYSTEM PID/DATA MONITOR INSPECTION [TCM (GW6A-EL)].)

―  ECU_A

―  ECU_B

―  ECU_C

―  GEAR_SEL

―  LINEDES

―  OP_SW1

―  OP_SW2

―  OP_SW3

―  OP_SW4

―  OSS

―  SS1

―  SS2

―  SS3

―  SS4

―  SSLU

―  SSLU_PRES

―  SSP

―  SSP_PRES

―  TR

―  TSS

―  VSS

•  Is there any malfunction?

Yes

Replace the control valve body.

(See CONTROL VALVE BODY REMOVAL/INSTALLATION [GW6A-EL].)

No

Replace the automatic transaxle.

(See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [GW6A-EL].)

Step	Inspection	Results	Action
1	VERIFY DTCs • Are any DTCs detected?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (GW6A-EL)].)
1	VERIFY DTCs • Are any DTCs detected?	No	Go to the next step.
2	PERFORM INITIAL LEARNING AND N TO D RANGE LEARNING 1. Perform the initial learning. (See INITIAL LEARNING [GW6A-EL].) 2. Perform the N to D position learning using the following procedure: (1) Set the ATF temperature to 30 °C {86 °F} or more. (2) Shift the selector lever to N position. (3) Shift the selector lever to D position and wait for 5 s or more. (4) Shift the selector lever to N position and wait for 5 s or more. (5) Perform steps (3) to (4) 10 times. • Has the malfunction symptom been eliminated?	Yes	Complete the symptom troubleshooting.
2		No	Go to the next step.
3	VERIFY IF MALFUNCTION CAUSE IS CONTROL VALVE BODY • Inspect the value at the following TCM PIDs using the M-MDS. (See ON-BOARD DIAGNOSTIC SYSTEM PID/DATA MONITOR INSPECTION [TCM (GW6A-EL)].) ― ECU_A ― ECU_B ― ECU_C ― GEAR_SEL ― LINEDES ― OP_SW1 ― OP_SW2 ― OP_SW3 ― OP_SW4 ― OSS ― SS1 ― SS2 ― SS3 ― SS4 ― SSLU ― SSLU_PRES ― SSP ― SSP_PRES ― TR ― TSS ― VSS • Is there any malfunction?	Yes	Replace the control valve body. (See CONTROL VALVE BODY REMOVAL/INSTALLATION [GW6A-EL].)
3		No	Replace the automatic transaxle. (See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [GW6A-EL].)