INSPECTION PROCEDURE 1: No Communication Possible Between Scan Tool and All Systems.: Diagnosis

STEP 1. Measure the power supply voltage at data link connector C-14.
Measure the voltage between data link connector C-14 terminal 16 and ground.
- The measured voltage should equal battery positive voltage.
Q: Is the measured voltage equal to battery positive voltage?
1. YES : Go to Step 4.
2. NO : Go to Step 2.
Fig 1: Identifying Data Link Connector C-14 Terminals
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Fig 2: Measuring Voltage Between Data Link Connector C-14 Terminal 16 And Ground
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
STEP 2. Check data link connector C-14, intermediate connector C-126, junction block connector C-212, C-214 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are the connectors and terminals in good condition?
1. YES : Go to Step 3.
2. NO : Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .
Fig 3: Identifying Data Link Connector C-14 Terminals
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Fig 4: Identifying Intermediate Connector C-126 Terminals
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Fig 5: Identifying Junction Block Connector C-212, C-214 Terminals
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STEP 3. Check the harness for open circuit or short circuit to ground between data link connector C-14 terminal 16 and fusible link 1.
Q: Is the harness wire in good condition?
1. YES : It can be assumed that this malfunction is intermittent. Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION .
2. NO : Repair or replace the harness wire.
Fig 6: Identifying Data Link Connector C-14 Terminals
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
STEP 4. Measure the ground circuit for resistance at the data link connector C-14.
Measure the resistance between terminal 4, 5 and ground.
- The resistance should measure less than 2 ohms.
Q: Is the measured resistance less than 2 ohms?
1. YES : Replace the scan tool.
2. NO : Go to Step 5.
Fig 7: Identifying Data Link Connector C-14 Terminals
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Fig 8: Measuring Resistance Between Connector C-14 Terminal 4, 5 And Ground
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
STEP 5. Check data link connector C-14 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are the connector and terminals in good condition?
1. YES : Go to Step 6.
2. NO : Repair or replace the harness wire.
Fig 9: Identifying Data Link Connector C-14 Terminals
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
STEP 6. Check the harness for open circuit between data link connector C-14 terminal 4, 5 and ground.
Q: Is the harness wire in good condition?
1. YES : It can be assumed that this malfunction is intermittent. Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION .
2. NO : Repair or replace the harness wire.
Fig 10: Identifying Data Link Connector C-14 Terminals
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.