AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-115
CIRCUIT OPERATION
•
A coil built into the output shaft speed sensor
generates 0
⇔
5 volts pulse signal at both ends
of this coil when the output shaft rotates. The
pulse signal frequency increases with a rise in
output shaft speed.
•
Both ends of the coil are connected to the PCM
(terminals 57 and 104) via the output shaft speed
sensor connector (terminals 1 and 2).
•
The PCM detects the output shaft speed by the
signal input to terminal 104.
•
The output shaft speed sensor generates the
pulse signal as the teeth of the transfer drive gear
pass the magnetic tip of the sensor.
DTC SET CONDITIONS
If the output from the output shaft speed sensor is
continuously 50 percent lower than the vehicle speed
for one second or more while driving in 3rd or 4th
gear at a speed of 30 km/h (19 mph) or more, it is
judged to be an open circuit or short-circuit in the
output shaft speed sensor and diagnostic trouble
code number "23" is output. If diagnostic trouble
code number "23" is output four times, the
transmission is locked into 3rd gear or 2nd gear as a
fail-safe measure, and the "N" range light flashes
once per second.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set:)
•
Malfunction of the output shaft speed sensor
•
Malfunction of the transfer drive gear or driven
gear
•
Damaged harness, connector
•
Malfunction of the PCM
DIAGNOSIS
Required Special Tool:
MB991502: Scan Tool (MUT-II)
AC001837AE
CONNECTOR: B-38
AC001741 AJ
CONNECTOR: C-28
AC001657
CONNECTORS: C-54 <2.4L ENGINE> OR
C-55 <3.0L ENGINE>, C-61 <2.4L ENGINE>
OR C-63 <3.0L ENGINE>
PCM
AM
C-54 <2.4L ENGINE>
OR
C-55 <3.0L ENGINE>
C-61 <2.4L ENGINE>
OR
C-63 <3.0L ENGINE>
AC001691
CONNECTORS: C-101, C-107
C-101
JUNCTION BLOCK
(FRONT VIEW)
C-107
AN