Mitsubishi Outlander GS45X. Manual - part 1687

AUTOMATIC TRANSAXLE DIAGNOSIS <A/T>

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LOGIC FLOW CHARTS (Monitor Sequence)

.

Good

END

No

No

No

No

No

Malfunction

Malfunction

No

AC802664

Vabs: Vehicle speed signal of ABS

Voss: Calculated vehicle speed
          by output shaft speed sensor

Vabs

20 km/h (12.4 mph)

Voss

5 km/h (3.1 mph)

START

Continuous failure for 2.5 secs.

Continuous failure for 2 sec.

Yes

Yes

Yes

Voss

20 km/h (12.4 mph)

Yes

Yes

Yes

Yes

No

          Rapid Voss change
     -20 km/h (-12.4 mph)/ 50 msec

          Not occur Vabs change
     -20 km/h (-12.4 mph)/ 50 msec

AUTOMATIC TRANSAXLE DIAGNOSIS <A/T>

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DTC SET CONDITIONS

Check Conditions

• Vehicle speed: 20 km/h (12.4 mph) or more.

• Vehicle speed signal from ABS: more than -20 

km/h (-12.4 mph)/0.05 seconds.

Judgment Criteria

• Rapid vehicle speed change: -20 km/h (-12.4 

mph)/0.05 second or less. (2 seconds)

Check Conditions

• Vehicle speed signal from ABS: 20 km/h (12.4 

mph) or more.

Judgment Criteria

• Vehicle speed: 5 km/h (3.1 mph) or less. (2.5 sec-

onds)

.

OBD-II DRIVE CYCLE PATTERN

Drive with the vehicle speed 20 km/h (12.4 mph).

.

TROUBLESHOOTING HINTS (THE MOST 
LIKELY CAUSES FOR THIS CODE TO BE 
SET ARE:)

• Malfunction of the output shaft speed sensor sys-

tem circuit

• Damaged harness or connector

• Malfunction of the output shaft speed sensor

• Malfunction of the TCM

• Malfunction of the output shaft speed sensor 

rotor (A/T assembly)

DIAGNOSIS

STEP 1. Check the TCM terminal voltage and frequency.
[C-37 TCM connector (vehicle side, connected)]
Check that the voltage between C-37 terminal No. 48 and C-38 
terminal No. 13 or C-38 terminal No. 26 is 0 V, and then check 
the frequency of C-37 terminal No. 37.

• At D range, vehicle speed is 30 km/h (19 mph): Approx. 588 

Hz

Q: Is the check result normal?

YES : Go to Step 6.
NO :  Go to Step 2.

STEP 2. Check the power supply and sensor ground.
[B-108 output shaft speed sensor connector (vehicle side, dis-
connected)]

• With the ignition switch ON: Terminal No. 1 to No. 3 → Bat-

tery positive voltage

Q: Is the check result normal?

YES : Go to Step 3.
NO :  Go to Step 4.

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STEP 3. Check the wiring harness between the output 
shaft speed sensor and TCM.
Check for continuity between B-108 output shaft speed sensor 
terminals and C-37 TCM terminals.
NOTE: Prior to the wiring harness inspection, check the inter-
mediate connectors A-12 and repair that if necessary.

• Between B-108 terminal No. 2 and C-37 terminal No. 37: 

Continuity exists.

When the continuity check result is OK, check that the wiring 
harness is not shorted to the body and other wiring harness.
Q: Is the check result normal?

YES : Replace the output shaft speed sensor with the one of 

the same transaxle of the same model. Then go to 
Step 7.

NO :  Repair or replace the failure section, and then go to 

Step 6.

STEP 4. Check the path between the ignition switch and 
the output shaft speed sensor.

• Check the wiring harness for an open/short circuit between 

the ignition switch and B-108 output shaft speed sensor 
connector terminal No. 1.

• Check for a blown fuse.

Q: Is the check result normal?

YES : Go to Step 5.
NO :  Repair or replace the failure section.

STEP 5. Check the wiring harness between the output 
shaft speed sensor and TCM.
Check for continuity between B-108 output shaft speed sensor 
terminals and C-37 TCM terminals.
NOTE: Prior to the wiring harness inspection, check the inter-
mediate connectors A-12 and repair that if necessary.

• Between B-108 terminal No. 1 and C-37 terminal No. 48: 

Continuity exists.

When the continuity check result is OK, check that the wiring 
harness is not shorted to the body and other wiring harness.
Q: Is the check result normal?

YES : Go to Step 8.
NO :  Repair or replace the failure section.

STEP 6. Drive the vehicle for a while.
Check that the normal code is displayed.
Q: Is the check result normal?

YES : The procedure is complete.
NO :  Replace the TCM.

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STEP 7. After replacing the output shaft speed sensor, 
drive the vehicle for a while, and then check the DTC 
again.
Q: Is the check result normal?

YES : Replace the output shaft speed sensor.
NO :  Replace the TCM. Then go to Step 9.

STEP 8. Check the TCM connector pin terminal and the 
connection status.
Q: Is there a failure point?

YES : Repair or replace the failure section.
NO :  Replace the TCM.

STEP 9. Diagnostic trouble code recheck.

1. Erase the diagnostic trouble code.
2. Drive the vehicle at 20 km/h (12.4 mph) or more.
3. Check if the diagnostic trouble code is set.

Q: Is the diagnostic trouble code set?

YES : Remove the A/T. Carry out the internal check and 

repair the defective part (the output shaft speed 
sensor rotor may be defective).

NO :  The procedure is complete.