Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement page 216

Code No. 41 1st gear ratio does not meet the specification
Code No. 42 2nd gear ratio does not meet the specification
Code No. 43 3rd gear ratio does not meet the specification
Code No. 44 4th gear ratio does not meet the specification
Code No. 46 Reverse gear ratio does not meet the
specification
If the output from the output shaft speed sensor multiplied by each gear ratio is not
the same as the output from the input shaft speed sensor after shifting to each gear
has been completed, each diagnosis code is output. If each diagnosis code is output
four times, the transmission is locked into 3rd gear as a fail-safe measure, and the
N range lamp flashes at a frequency of 1 Hz.
MUT-II Self-Diag code
Is the diagnosis code No. 22 output?
MUT-II Self-Diag code
Is the diagnosis code No. 23 output?
Measure output waveform from the input shaft speed sensor. (using
an oscilloscope)
D Connect the connector A-90 and measure voltage between
1 and 2 at the engine-A/T-ECU or A/T-ECU.
D Engine: 2,000 r/min (approx. 50 km/h)
D Selector lever position: 3
(Voltage)
OK A waveform such as the one shown on P.23-43* (Inspec-
tion Procedure Using an Oscilloscope) is output (flashing
between 0 ¨ 5 V) and there is no noise appearing
in the waveform.
Measure output waveform from the output shaft speed sensor.
(using an oscilloscope)
D Connect the connector A-82 and measure voltage between
1 and 2 at the engine-A/T-ECU or A/T-ECU.
D Engine: 2,000 r/min (approx. 50 km/h)
D Selector lever position: 3
(Voltage)
OK A waveform such as the one shown on P.23- 43* (Inspec-
tion Procedure Using an Oscilloscope) is output (flashing
between 0 ¨ 5 V) and there is no noise appearing
in the waveform.
D Low and reverse brake system check (for code No. 41, 46)
D Underdrive clutch system check (for code No. 41, 42, 43)
D Second brake system check (for code No. 42, 44)
D Overdrive clutch system check (for code No. 43, 44)
D Reverse clutch system check (for code No. 46)
NOTE
*: Refer to '99 SPACE RUNNER/SPACE WAGON Workshop Manual (Pub. No. PWDE9803).
AUTOMATIC TRANSMISSION -
No
No
OK
OK
Troubleshooting
Probable cause
D Malfunction of the input shaft speed sensor
D Malfunction of the output shaft speed sensor
D Malfunction of the underdrive clutch retainer
D Malfunction of the transfer drive gear or driven gear
D Malfunction of the low and reverse brake system (for
code No. 41, 46)
D Malfunction of the underdrive clutch system (for code
No. 41, 42, 43)
D Malfunction of the second brake system (for code No.
42, 44)
D Malfunction of the overdrive clutch system (for code
No. 43, 44)
D Malfunction of the reverse clutch system (for code
No. 46)
D Noise generated
L: Refer to the Transmission Workshop Manual.
Yes
Code No. 22 Input shaft speed sensor system check
(Refer to P.23-5.)
Yes
Code No. 23 Output shaft speed sensor system check
(Refer to P.23-6.)
NG
Replace the input shaft speed sensor.
Check the trouble symptoms.
A/T overhaul L
D Replace the underdrive clutch retainer.
Check the trouble symptoms.
Eliminate the cause of the noise.
NG
Replace the output shaft speed sensor.
Check the trouble symptoms.
A/T overhaul L
D Replace the transfer drive gear and driven gear.
Check the trouble symptoms.
Eliminate the cause of the noise.
23-9
NG
NG
NG
NG