Mitsubishi Eclipse. Manual — part 784
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-145
STEP 17. Replace the output shaft speed sensor.
(1) Replace the output shaft speed sensor. Refer to GROUP
23B, Transaxle
(2) Test drive the vehicle.
(3) Check for A/T diagnostic trouble code.
Q: Is A/T DTC 23 set?
YES : Go to Step 18.
NO : The procedure is complete.
STEP 18. Replace the transfer drive gear or driven gear.
(1) Replace the transfer drive gear or driven gear. Refer to
GROUP 23B, Transaxle
, Output Shaft
(2) Test drive the vehicle.
(3) Check for A/T diagnostic trouble code.
Q: Is A/T DTC 23 set?
YES : An A/T DTC may have set due to external radio
frequency interference (RFI) possibility caused by
cellular phone activity, or aftermarket components
installed on the vehicle.
NO : The procedure is complete.
STEP 19. Using scan tool MB991958, check data list item
23: Output Shaft Speed Sensor.
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Start the engine.
(3) Set scan tool MB991958 to data reading mode for item 23:
Output Shaft Speed Sensor.
• When driving at constant speed of 50 km/h (31 mph),
the display should be "1,600
− 1,900 r/min." <2.4L
Engine>, "1,300
− 1,600 r/min." <3.0L Engine> (Gear
range: 3rd gear)
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?
YES : It can be assumed that this malfunction is intermittent.
Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points
− How to
Cope with Intermittent Malfunction
.
NO : Replace the PCM.
AC001837AD
OUTPUT SHAFT
SPEED SENSOR
AC002221AC
TRANSFER
DRIVE GEAR
TRANSFER
DRIVEN GEAR
AC303127
AB
MB991911
16-PIN
MB991827
MB991824
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-146
DTC 26: Stoplight Switch System
AC106632AB
Stoplight Switch System Circuit
AC001729
C-03
CONNECTOR: C-03
AV
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-147
.
CIRCUIT OPERATION
• Battery positive voltage is supplied to the stop-
light switch (terminal 2).
• When the brake pedal is depressed, battery posi-
tive voltage is applied to the PCM (terminal 123).
.
DTC SET CONDITIONS
If the stoplight switch is on for five minutes or more
while driving above 50 km/h (31 mph), or all of the
stoplight bulbs are blown, it is judged there is a short
circuit or open circuit in the stoplight switch. This
causes DTC 26 to be set.
.
AC106611AB
CONNECTOR: C-28
C-28
AC001657
CONNECTOR: C-61 <2.4L ENGINE> OR
C-63 <3.0L ENGINE>
PCM
BC
C-61 <2.4L ENGINE> OR C-63 <3.0L ENGINE>
AC106616 AB
CONNECTOR BLOCK (LH)
CONNECTOR: C-89
C-89
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-148
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are:)
• Malfunction of the stoplight switch circuit
• Malfunction of stoplight valve
• Damaged harness or connector
• Malfunction of the PCM
DIAGNOSIS
Required Special Tool:
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: MUT-III USB Cable
• MB991911: MUT-III Main Harness B
STEP 1. Check the stoplight turning on or off.
Check that the stoplights are turned on when the brake pedal is
depressed, or turned off when released.
Q: Is the operating properly?
YES : Go to Step 9.
NO : Go to Step 2.
STEP 2. Check the brake pedal height.
Refer to GROUP 35A, On-vehicle Service
− Brake Pedal
Check and Adjustment
Q: Is the height adjusted properly?
YES : Go to Step 3.
NO : Adjust the brake pedal to the proper height.
STEP 3. Using scan tool MB991958, check data list item 26:
Stoplight Switch.
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958 to data reading mode for item 26:
Stoplight Switch.
• When the brake pedal is depressed, the display on the
scan tool MB991958 should be "ON."
• When the brake pedal is not depressed, the display on
the scan tool MB991958 should be "OFF."
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the switch operating properly?
YES : If can be assumed that this malfunction may be
intermittent. Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points
− How to
Cope with Intermittent Malfunction
.
NO : Go to Step 4.
AC303127
AB
MB991911
16-PIN
MB991827
MB991824
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