Home

Mazdamanuals.com

 NO.17 EXCESSIVE SHIFT SHOCK FROM N TO D OR N TO R POSITION/RANGE [JA5AX-EL]

NO.17 EXCESSIVE SHIFT SHOCK FROM N TO D OR N TO R POSITION/RANGE [JA5AX-EL]

id050305802200

17

Excessive shift shock from N to D or N to R position/range

DESCRIPTION

• Strong shock felt when shifting from N to D or N to R position/range at idle.

POSSIBLE CAUSE

• Shift shock may worsen when fail-safe is operating. If no DTC is output, shift shock may worsen due to poor operation of control valve body or sticking of clutch.
- Clutch burned (N→D: Low clutch, N→R: Reverse clutch or low and reverse brake)
• Line pressure low
• Incorrect throttle position signal
• Malfunction of TFT sensor
• Malfunction of sensor ground
• Misadjustment of throttle cable
• Malfunction of control valve body
- Poor hydraulic operation (Malfunction in range change)
- Idle speed high
- Poor tightening torque of engine mount, exhaust mount
- Line pressure high
Note
• Before following troubleshooting steps, make sure that Automatic Transaxle On-Board Diagnostic and Automatic Transaxle Basic Inspection are conducted.

Diagnostic procedure

STEP

INSPECTION

ACTION

1
• Does shift shock occur only when engine cold?
Yes
Go to next step.
No
Go to Step 3.
2
• Inspect TFT sensor and related harness: vibration, intermittent open/short circuit.
• Is it okay?
Yes
Go to next step.
No
Repair or replace part if necessary.
3
• Is line pressure okay?
Yes
Go to next step.
No
Repair or replace any defective parts according to inspection results.
4
• Is stall speed okay?
Yes
Go to next step.
No
Go to Step 6.
5
• Inspect TR switch and related harness: vibration, intermittent open/short circuit.
• Is it okay?
Yes
Go to next step.
No
Repair or replace part if necessary.
6
• Stop engine and turn ignition switch on.
• Inspect pressure control solenoid circuit.
• Is it okay?
Yes
• Overhaul control valve body and repair or replace any defective parts.
(See ATX Workshop Manual.)
• If problem remains, replace or overhaul transaxle and repair or replace any defective parts.
(See ATX Workshop Manual.)
No
• Inspect for pressure control solenoid mechanical stuck.
7
• Verify test results.
- If okay, return to diagnostic index to service any additional symptoms.
- If malfunction remains, inspect related Service Informations and perform repair or diagnosis.
• If vehicle repaired, troubleshooting completed.
• If vehicle not repaired or additional diagnostic information not available, replace TCM.