Mitsubishi Grandis. Manual - part 860

TROUBLESHOOTING <A/T>

AUTOMATIC TRANSMISSION (FF)

23A-107

STEP 10. Check the shift switch assembly.

Refer to 

P.23A-145

.

Q: Is the check result normal?

YES : 

Go to Step 11.

NO : 

Replace the shift switch assembly.

STEP 11. Connector check: C-121 shift switch 
assembly connector

Check for the contact with terminals.

Q: Is the check result normal?

YES : 

Go to Step 12.

NO : 

Repair the defective connector.

STEP 12. Measure the voltage at shift switch 
assembly connector C-121
(1) Disconnect the connector, and measure the 

voltage between terminal 1 and earth at the 
wiring harness side.

(2) Selector lever position: D
(3) Ignition switch: ON

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 13.

NO : 

Go to Step 15.

AC310613

BA

C-121

Connector: C-121
<LHD>

Harness side

AC310631AW

C-121

Harness side

Connector: C-121
<RHD>

AC310613

BA

C-121

Connector: C-121
<LHD>

Harness side

AC310631AW

C-121

Harness side

Connector: C-121
<RHD>

TROUBLESHOOTING <A/T>

AUTOMATIC TRANSMISSION (FF)

23A-108

STEP 13. Connectors check: C-112 
engine-A/T-ECU connector

Check for the contact with terminals.

Q: Is the check result normal?

YES : 

Go to Step 14.

NO : 

Repair the defective connector.

STEP 14. Check the harness between shift switch 
assembly connector C-121 terminal No.4 and 
engine-A/T-ECU connector C-112 terminal No.85.

Check the output line for short-circuited or open 
circuit.

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Repair the wiring harness.

AC311284

Connector: C-112 <LHD>

Connector: C-112 <RHD>

Harness side

Engine-A/T-ECU

C-112 (GR)

C-112 (GR)

Engine-A/T-ECU

AG

AC310613

BA

C-121

Connector: C-121
<LHD>

Harness side

AC310631AW

C-121

Harness side

Connector: C-121
<RHD>

AC311284

Connector: C-112 <LHD>

Connector: C-112 <RHD>

Harness side

Engine-A/T-ECU

C-112 (GR)

C-112 (GR)

Engine-A/T-ECU

AG

TROUBLESHOOTING <A/T>

AUTOMATIC TRANSMISSION (FF)

23A-109

STEP 15. Connector check: C-17 intermediate 
connector

Check for the contact with terminals.

Q: Is the check result normal?

YES : 

Go to Step 16.

NO : 

Repair the defective connector.

STEP 16. Check the harness between shift switch 
assembly connector C-121 terminal No.1 and 
inhibitor switch connector B-111 terminal No.1.

Check the power supply line for short or open circuit.

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Repair the wiring harness.

STEP 17. Check the shift switch assembly.

Refer to 

P.23A-145

.

Q: Is the check result normal?

YES : 

Go to Step 18.

NO : 

Replace the shift switch assembly.

AC310615

AR

Connector: C-17
<LHD>

C-17

AC310628

Connector: C-17
<RHD>

AV

C-17

AC310613

BA

C-121

Connector: C-121
<LHD>

Harness side

AC310631AW

C-121

Harness side

Connector: C-121
<RHD>

AC303714AH

Connector: B-111

B-111 (B)

Harness side

TROUBLESHOOTING <A/T>

AUTOMATIC TRANSMISSION (FF)

23A-110

STEP 18. Connectors check: C-121 shift switch 
assembly connector, C-112 engine-A/T-ECU 
connector, C-17 intermediate connector