DTC B1860: Battery Connection: Diagnosis

STEP 1. Check TCU battery connector.
Q: Is the check result normal?

YES: Go to Step 2.

NO: Repair the connector or replace the TCU battery (Refer to TCU BATTERY REPLACEMENT ).

STEP 2. Check TCU battery.

Remove the TCU battery (Refer to TCU BATTERY REPLACEMENT ).

Connect a voltmeter between the TCU battery connector terminals, and check whether a needle of analog tester fluctuates.

Q: Is the check result normal?

YES: Go to Step 3.

NO: Replace the TCU battery (Refer to TCU BATTERY REPLACEMENT ).

G12150875

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

STEP 3. Using scan tool (M.U.T.-IIISE), check whether the DTC is set again.
Check again if the DTC is set in the TCU.

CAUTION: To prevent damage to scan tool (M.U.T.-IIISE), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-IIISE).
1. Connect scan tool (M.U.T.-IIISE). Refer to "HOW TO CONNECT THE SCAN TOOL (M.U.T.-IIISE) ."
2. Erase the DTC.
3. Turn the ignition switch from OFF position to ON position.
4. Check the DTC.
  Q: Is the DTC set?
  
  YES: Replace the TCU (Refer to TCU ).
  
  NO: The trouble can be an intermittent malfunction (Refer to How to use Troubleshooting/inspection Service Points - HOW TO COPE WITH INTERMITTENT MALFUNCTION ).