Mitsubishi Outlander: DTC B1BBA, B1BBC, B1BBD, B1C23, B1C24, B1C25, B1C26, B1CB2, B210D, B210E, B2206, B2212, B2250, B2262

DTC B1BBA: Passenger Seat Weight Sensor Power Supply Circuit

CAUTION If DTC B1BBA is set in the occupant classification- ECU, always diagnose the CAN main bus lines.

CIRCUIT OPERATION

The load data from the weight sensor is classified with the occupant classification-ECU, and its classified information is send to SRS-ECU by CAN bus line. The SRS-ECU determines the air bag deployment based on this classified information, and controls the power supply circuit to the inflator.

DTC SET CONDITIONS

This DTC is set if the weight sensor power supply line is defective.

TROUBLESHOOTING HINTS

• The weight sensor may be defective.
• The occupant classification-ECU may be defective.
• The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector

DIAGNOSIS

Required Special Tools:

• MB991958 Scan Tool (M.U.T.-III Sub Assembly)
  • MB991824: Vehicle Communication Interface (V.C.I.)
  • MB991827 M.U.T.-III USB Cable
  • MB991910 M.U.T.-III Main Harness A (Vehicles with CAN communication system)

STEP 1. Using scan tool MB991958, diagnose the CAN bus line.

CAUTION To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.

1. Connect scan tool MB991958. Refer to "How to connect the scan tool".
2. Turn the ignition switch to the "ON" position.
3. Diagnose the CAN bus line.
4. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the CAN bus line found to be normal?

YES : Go to Step 2.

NO : Repair the CAN bus line.

STEP 2. Recheck for diagnostic trouble code.

Check again if the DTC is set.

1. Erase the DTC.
2. Turn the ignition switch to the "ON" position.
3. Check if the DTC is set.
4. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the DTC set?

YES : Go to Step 3.

NO : There is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction).

STEP 3. Using scan tool MB991958,read the occupant classification-ECU diagnostic trouble code.

Check if the DTC B210D or B210E is set the occupant classification- ECU.

Q: Is the DTC B1B78, B1B7D, B1B82 or B1B87 set?

YES : Diagnose the occupant classification-ECU.

NO : Replace the passenger seat cushion frame assembly.

DTC B1BBC: Occupant Classification System Negative System Weight

CAUTION If DTC B1BBC is set in the occupant classification- ECU, always diagnose the CAN main bus lines.

CIRCUIT OPERATION

The load data from the weight sensor is classified with the occupant classification-ECU, and its classified information is send to SRS-ECU by CAN bus line. The SRS-ECU determines the air bag deployment based on this classified information, and controls the power supply circuit to the inflator.

DTC SET CONDITION

This DTC is set if the passenger seat weight is −15 Kg (−35 pound) or less.

TROUBLESHOOTING HINTS

An object is caught in between the passenger seat and floor.

DIAGNOSIS

Required Special Tools:

• MB991958 Scan Tool (M.U.T.-III Sub Assembly)
  • MB991824: Vehicle Communication Interface (V.C.I.)
  • MB991827 M.U.T.-III USB Cable
  • MB991910 M.U.T.-III Main Harness A (Vehicles with CAN communication system)

STEP 1. Check for an object caught in between the passenger seat and floor.

Q: Is the check result normal?

YES : Go to Step 2.

NO : It corrects.

STEP 2. Using scan tool MB991958, diagnose the CAN bus line.

CAUTION To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.

1. Connect scan tool MB991958. Refer to "How to connect the scan tool".
2. Turn the ignition switch to the "ON" position.
3. Diagnose the CAN bus line.
4. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the CAN bus line found to be normal?

YES : Go to Step 3.

NO : Repair the CAN bus line.

STEP 3. Recheck for diagnostic trouble code.

Check again if the DTC is set.

1. Erase the DTC.
2. Turn the ignition switch to the "ON" position.
3. Check if the DTC is set.
4. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the DTC B1BBC set?

YES : Replace the passenger seat cushion frame assembly.

NO : There is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction).

DTC B1BBD: Occupant Classification-ECU Current Configuration table Unprogrammed

CAUTION If DTC B1BBD is set in the occupant classification- ECU, always diagnose the CAN main bus lines.

DTC SET CONDITIONS

The DTC is set if the check error occurs in the coding data of the occupant classification-ECU.

TROUBLESHOOTING HINTS

• Zero calibration not executed
• The occupant Classification-ECU may be defective.

DIAGNOSIS

Required Special Tools:

• MB991958 Scan Tool (M.U.T.-III Sub Assembly)
  • MB991824: Vehicle Communication Interface (V.C.I.)
  • MB991827 M.U.T.-III USB Cable
  • MB991910 M.U.T.-III Main Harness A (Vehicles with CAN communication system)

STEP 1. Using scan tool MB991958, diagnose the CAN bus line.

CAUTION To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.

1. Connect scan tool MB991958. Refer to "How to connect the scan tool".
2. Turn the ignition switch to the "ON" position.
3. Diagnose the CAN bus line.
4. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the CAN bus line found to be normal?

YES : Go to Step 2.

NO : Repair the CAN bus line.
 

STEP 2. Recheck for diagnostic trouble code.

Check again if the DTC is set the occupant classification-ECU.

1. Zero calibration of occupant classification -ECU
2. Erase the DTC.
3. Turn the ignition switch to the "ON" position.
4. Check if the DTC is set.
5. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the DTC set?

YES : Replace the passenger seat cushion frame assembly (Refer to GROUP 52A, Front Seat Assembly).

NO : There is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction).

DTC B1C23: Passenger Seat Weight Sensor (front: LH) Configuration Mismatch
DTC B1C24: Passenger Seat Weight Sensor (front: RH) Configuration Mismatch
DTC B1C25: Passenger Seat Weight Sensor (rear: LH) Configuration Mismatch
DTC B1C26: Passenger Seat Weight Sensor (rear: RH) Configuration Mismatch

CAUTION If DTC B1C23, B1C24 B1C25, B1C26 is set in the occupant classification-ECU, always diagnose the CAN main bus lines.

DTC SET CONDITIONS

The DTC is set if the weight sensor serial No. of the coding data in the occupant classification-ECU does not match the serial No. sent from the weight sensor.

TROUBLESHOOTING HINTS

• Zero calibration not executed

DIAGNOSIS

Required Special Tools:

• MB991958 Scan Tool (M.U.T.-III Sub Assembly)
  • MB991824: Vehicle Communication Interface (V.C.I.)
  • MB991827 M.U.T.-III USB Cable
  • MB991910 M.U.T.-III Main Harness A (Vehicles with CAN communication system)

STEP 1. Using scan tool MB991958, diagnose the CAN bus line.

CAUTION To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.

1. Connect scan tool MB991958. Refer to "How to connect the scan tool".
2. Turn the ignition switch to the "ON" position.
3. Diagnose the CAN bus line.
4. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the CAN bus line found to be normal?

YES : Go to Step 2.

NO : Repair the CAN bus line.

STEP 2. Recheck for diagnostic trouble code.

Check again if the DTC is set.

1. Erase the DTC.
2. Turn the ignition switch to the "ON" position.
3. Check if the DTC is set.
4. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the DTC set?

YES : Perform the zero calibration, and check the DTC again. If the DTC is set, replace the front seat cushion frame (RH).

NO : There is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction).

DTC B1CB2: Occupant Classification-ECU Parameter Table Incompatible
DTC B2212: Occupant Classification-ECU Internal Failure
DTC B2250: Occupant Classification-ECU not Parameter Flash Required
DTC B2262: Occupant Classification-ECU Electrostatic Discharge Event Detected

CAUTION If DTC B1CB2, B2212, B2250, B2262 is set in the occupant classification-ECU, always diagnose the CAN main bus lines.

TROUBLE JUDGMENT

The above DTC is set if an abnormality is detected in the circuit inside the occupant classification-ECU.

TROUBLESHOOTING HINTS

Malfunction of the occupant classification-ECU

DIAGNOSIS

Required Special Tools:

• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
  • MB991824: Vehicles Communication Interface (V.C.I.)
  • MB991827: M.U.T.-III USB Cable
  • MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

STEP 1. Using scan tool MB991958, diagnose the CAN bus line.

CAUTION To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.

1. Connect scan tool MB991958. Refer to "How to connect the scan tool".
2. Turn the ignition switch to the "ON" position.
3. Diagnose the CAN bus line.
4. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the CAN bus line found to be normal?

YES : Go to Step 2.

NO : Repair the CAN bus line.

STEP 2. Recheck for diagnostic trouble code.

Check again if the DTC is set.

1. Erase the DTC.
2. Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
3. Check if DTC is set.
4. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the DTC set?

YES : Replace the passenger seat cushion frame assembly.

NO : There is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction).

DTC B210D: Battery Voltage Low
DTC B210E: Battery Voltage High

Occupant Classification-ECU Power Supply Circuit

CAUTION If DTC B210D, B210E is set in the occupant classification- ECU, always diagnose the CAN main bus lines.

TROUBLE JUDGMENT

The occupant classification-ECU sets DTC B210D if the power supply fuse voltage decreases to the specified value or less, and sets DTC B210E if the power supply fuse voltage increases to the specified value or more.

TECHNICAL DESCRIPTION (COMMENT)

The power supply fuse or the occupant classification- ECU may have a problem.

TROUBLESHOOTING HINTS

• The power supply fuse may be defective.
• The occupant classification-ECU may be defective.
• The battery may be defective.
• The generator may be defective.
• The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector

DIAGNOSIS

Required Special Tools:

• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
  • MB991824: Vehicle Communication Interface (V.C.I.)
  • MB991827: M.U.T.-III USB Cable
  • MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

STEP 1. Measure the voltage at the occupant classification-ECU connector.

1. Disconnect the D-34-2 occupant classification-ECU connector.
2. Measure the voltage between the D-34-2 harness side connector terminal No. 21 and the body ground.

• The voltage should measure 12 volts (battery positive voltage).

Q: Is the measured voltage approximately 12 volts (battery positive voltage)?

YES : Go to Step 10.

NO : Go to Step 2.

STEP 2. Power supply fuse No.17 check.

Q: Is the fuse in good condition?

YES : Go to Step 4.

NO : Go to Step 3.

STEP 3. Wiring harness check between the C-315 ETACS-ECU connector terminal No.4 and the D-34-2 occupant classification-ECU connector terminal No. 21.

• Short circuit check for SRS-ECU power supply wire

Q: Is the check result normal?

YES : Replace the power supply fuse.

NO : Repair the wiring harness. And then replace the power supply fuse.

STEP 4. Battery check.

Refer to GROUP 54A, Battery Test.

Q: Is the check result normal?

YES : Go to Step 5.

NO : Charge (B210D only) or replace the battery.

STEP 5. Measure the voltage at the ETACS-ECU connector.

1. Disconnect the C-309 ETACS-ECU connector.
2. Measure the voltage between the C-309 harness side connector terminal No. 1 and the body ground.

• The voltage should measure 12 volts (battery positive voltage).

Q: Is the measured voltage approximately 12 volts (battery positive voltage)?

YES : Go to Step 7.

NO : Go to Step 6.

STEP 6. Wiring harness check between the fusible link (34) and the C-309 ETACS-ECU connector terminal No. 1.

• Open circuit check for ETACS-ECU power supply wire

Q: Is the check result normal?

YES : Go to Step 10.

NO : Repair the wiring harness.

STEP 7. Using scan tool MB991958, diagnose the ETACS.

CAUTION To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.

1. Connect scan tool MB991958. Refer to "How to connect the scan tool".
2. Erase the DTC.
3. Turn the ignition switch to the "ON" position.
4. Diagnose the CAN bus line.
5. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the CAN bus line found to be normal?

YES : Diagnose the ETACS.

NO : Check the input signal of ETACS-ECU ignition switch (IG1) (Refer to GROUP 54A − ETACS, Symptom procedures P.54A-789). Than go to step 8.

STEP 8. Using scan tool MB991958, diagnose the CAN bus line.

CAUTION To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.

1. Connect scan tool MB991958. Refer to "How to connect the scan tool".
2. Turn the ignition switch to the "ON" position.
3. Diagnose the CAN bus line.
4. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the CAN bus line found to be normal?

YES : Go to Step 9.

NO : Repair the CAN bus line (Refer to GROUP 54C, Diagnosis P.54C-17).

STEP 9. Recheck for diagnostic trouble code.

Check again if the DTC is set.

1. Erase the DTC.
2. Turn the ignition switch to "ON" position.
3. Check if the DTC is set.
4. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the DTC set?

YES : Go to Step 10.

NO : There is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction).

STEP 10. Recheck for diagnostic trouble code.

Check again if the DTC is set.

1. Erase the DTC.
2. Turn the ignition switch to the "ON" position.
3. Check if the DTC is set.
4. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is DTC B210D or B210E set?

YES : Replace the passenger seat cushion frame assembly (Refer to GROUP 52A, Front Seat Assembly P.52A-19).

NO : There is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction).

DTC B2206: Chassis number does not match

CAUTION If DTC B2206 is set in the occupant classification- ECU, always diagnose the CAN bus line.

TROUBLE JUDGMENT

If the registered chassis number is different from the chassis number transmitted on the CAN bus lines, the occupant classification-ECU sets the DTC B2206.

JUDGMENT CRITERIA

If the chassis number registered to occupant classification- ECU and the chassis number on CAN bus lines do not match, the occupant classification-ECU determines that a problem has occurred.

TROUBLESHOOTING HINTS

• Chassis number not written
• The occupant classification-ECU may be defective.
• The CAN bus line may be defective.

DIAGNOSIS

Required Special Tools:

• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
  • MB991824: Vehicle Communication Interface (V.C.I.)
  • MB991827: M.U.T.-III USB Cable
  • MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

STEP 1. Using scan tool MB991958, diagnose the CAN bus line.

CAUTION To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.

1. Connect scan tool MB991958. Refer to "How to connect the Scan Tool (M.U.T.-III)".
2. Turn the ignition switch to the "ON" position.
3. Diagnose the CAN bus line.
4. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the CAN bus line found to be normal?

YES : Accuracy check is performed. Then go to Step 2.

NO : Repair the CAN bus line.

STEP 2. Recheck for diagnostic trouble code.

Check again if the DTC is set to the occupant classification- ECU.

1. Zero calibration of occupant classification-ECU.
2. Erase the DTC.
3. Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
4. Check if DTC is set.
5. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the DTC set?

YES : Replace the passenger seat cushion frame assembly (Refer to GROUP 52A, Front Seat Assembly).

NO : There is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction).

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