Diagnostic Test

1. Ignition on, engine not running.
2. With the scan tool under Data Display, read the TCASE (DTCM) Switch voltage.

Q: Is the voltage less than 0.2 volts? 

Yes : 

• Go To 2

No : 

• Go To  8

Fig 1: Checking 5 Volt Selector Switch Supply Circuit For Short To Voltage (K77)

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

1. Turn the ignition off
2. Disconnect the Transfer Case Selector Switch connector.
3. Turn the ignition on.
4. Measure the voltage between ground and the (K77) 5-volt Selector Switch Supply circuit.

Q: Is the voltage less than 0.2 volts? 

Yes : 

• Go To 3

No : 

• Go To  5

Fig 2: Checking 5 Volt Selector Switch Supply Circuit For Open (K77)

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

1. Turn the ignition off.
2. Disconnect the Instrument Cluster C1 connector.
3. Measure the resistance of the (K77) 5 Volt Selector Switch Supply circuit between the Instrument cluster C1 harness connector and the Transfer Case Selector Switch harness connector.

Q: Is the resistance greater than 5.0 ohms? 

Yes : 

• Repair the (K77) 5 Volt Selector Switch Supply circuit for an open.
• Perform the TRANSFER CASE VERIFICATION TEST - VER 1 .

No : 

• Go To 4

Fig 3: Checking 5 Volt Selector Switch Supply Circuit For Short To Ground (K77)

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

1. Measure the resistance between the (K77) 5 Volt Selector Switch Supply circuit and ground.

Q: Is the resistance less than 5.0 ohms? 

Yes : 

• Repair the (K77) 5 Volt Selector Switch Supply circuit for a short to ground.
• Perform the TRANSFER CASE VERIFICATION TEST - VER 1 .

No : 

• Replace the Instrument Cluster in accordance with the Service Information.
• Perform the BODY VERIFICATION TEST - VER 1 and TRANSFER CASE VERIFICATION TEST - VER 1 .

Fig 4: Checking Transfer Case Selector Switch

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

1. Turn the ignition off.
2. Connect a jumper wire between the (K77) 5 Volt Selector Switch Supply circuit and the (K977) Mode Select circuit in the Transfer Case Selector Switch connector.
3. Ignition on, engine not running.
4. With the scan tool in Data Display, read the Range Switch voltage.
   NOTE: The switch voltage should be approximately 5 volts.

Q: Is the voltage 5.0 volts (± .02 volts)? 

Yes : 

• Replace the Transfer Case Selector Switch in accordance with the Service Information.
• Perform the TRANSFER CASE VERIFICATION TEST - VER 1 .

No : 

• Go To 6

Fig 5: Checking Mode Select Circuit For Short To Ground (K977)

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

1. Disconnect the Instrument Cluster C2 connector.
2. Measure the resistance between the (K977) Mode Select circuit and ground.

Q: Is the resistance less than 5.0 ohms? 

Yes : 

• Repair the (K977) Mode Select circuit for a short to ground.
• Perform the TRANSFER CASE VERIFICATION TEST - VER 1 .

No : 

• Go To 7

Fig 6: Checking Mode Select Circuit For Open (K977)

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

1. Measure the resistance of the (K977) Mode Select circuit between the Instrument Cluster C2 harness connector and the Transfer Case Selector Switch harness connector.

Q: Is the resistance above 5.0 ohms? 

Yes : 

• Repair the (K977) Mode Select circuit for an open.
• Perform the TRANSFER CASE VERIFICATION TEST - VER 1 .

No : 

• Replace the Instrument Cluster in accordance with the Service Information.
• Perform the BODY VERIFICATION TEST - VER 1 and TRANSFER CASE VERIFICATION TEST - VER 1 .

1. The conditions necessary to set this DTC are not present at this time.
2. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
3. While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors.
4. Look for the data to change or for the DTC to reset during the wiggle test.

Q: Were any problems found? 

Yes : 

• Repair as necessary.
• Perform the TRANSFER CASE VERIFICATION TEST - VER 1 .

No : 

• Test complete.