DTC B210A: +B power supply (low); DTC B210B: +B power supply (high): Diagnosis

WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.

Required Special Tools:

MB991223: Harness Set
MB992006: Extra Fine Probe

STEP 1. Power supply fuse check
Q: Is the fuse in good condition?
1. YES: Go to Step 2.
2. NO: Replace the power supply fuse, and then go to Step 7.
STEP 2. Battery check
Refer to BATTERY TEST .

Q: Is the battery in good condition?
1. YES: Go to Step 3.
2. NO: Charge or replace the battery.
STEP 3. Charging system check
Refer to ON-VEHICLE SERVICE .

Q: Is the charging system in good condition?
1. YES: Go to Step 4.
2. NO: Repair or replace the charging system component(s).
STEP 4. Voltage measurement at ETACS-ECU connector (IODI terminal).
1. Disconnect the connector, and measure at the wiring harness side.
2. Measure the resistance between the ETACS-ECU connector (IOD1 terminal) and ground.
  OK: The voltage should measure approximately 12 volts (battery positive voltage).
Q: Is the check result normal?
1. YES: Go to Step 6.
2. NO: Go to Step 5.
STEP 5. Check of short to power supply, short to ground, and open circuit in IODI line between fusible link and ETACS-ECU connector
Q: Is the check result normal?
1. YES: The trouble can be an intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
2. NO: Repair the connector(s) or wiring harness.

STEP 6. Using scan tool (M.U.T.-III), check data list.

Check the power supply fuse voltage.

CAUTION: To prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III).

Connect scan Tool (M.U.T.-III). Refer to "HOW TO CONNECT THE SCAN TOOL (M.U.T.-III) ."

Check the ETACS data list.

Turn the ignition switch to the "LOCK" (OFF) position.

Item No.	Item name	Normal condition
Item 253	Voltage sensing of IOD Line	Battery positive voltage

OK: Normal condition is displayed.

Q: Is the check result normal?

YES: Go to Step 7.
NO: Replace the ETACS-ECU.

STEP 7. Recheck for diagnostic trouble code.
Check again if the DTC is stored in the ETACS-ECU.
1. Erase the DTC.
2. Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
3. Check if DTC is stored.
Q: Is the DTC stored?
1. YES: Replace the ETACS-ECU.
2. NO: The trouble can be an intermittent malfunction (HOW TO COPE WITH INTERMITTENT MALFUNCTION ).