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ON-BOARD DIAGNOSTIC FUNCTION

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• The on-board diagnostic system consists of a malfunction detection system that detects abnormalities in input/output signals, a data monitor function that reads out specified input/output signals.
• The data link connector 2 (DLC-2), which groups together all the connectors used for malfunction diagnosis and detecting/repair into a single location, has been adopted, thereby improving serviceability. Diagnosis is performed by connecting the WDS or equivalent to the DLC-2.
• In addition to DTC read-out, the WDS or equivalent is used to clear DTCs using the display screen of the diagnostic tester, and to access the PID/data monitor function, providing enhanced malfunction diagnosis and improved serviceability.

## Malfunction Detection Function

• The malfunction detection function detects malfunctions in the input/output signal system of the BCM.

DTC table

DTC No. | Description | Detection condition
--- | --- | ---
B1317 | Battery voltage high | Input voltage from the battery is excessively high
B1318 | Battery voltage low | Input voltage from the battery is excessively low
B1342 | ECU is faulted | BCM microcomputer malfunction
B2572 | Driver door lock switch short to ground | Short to GND in wiring harness between BCM and driver-side door lock-link switch
B2721 | Trunk lid/liftgate ajar output short to ground | Short to GND in wiring harness between BCM and trunk lid compartment light switch/cargo compartment light switch
B1873 | Turn signal/hazard power feed circuit short to ground | Short to GND in wiring harness between BCM and hazard warning switch
B1320 | Driver door ajar circuit open | Open circuit in wiring harness between BCM and front door switch (driver-side)
B1328 | Passenger door ajar circuit open | Open circuit in wiring harness between BCM and front door switch (passenger-side)
B1572 | Door ajar RL/RR circuit open | Open circuit in wiring harness between BCM and rear door switch (LH/RH)
B1614 | Rear wiper interval switch input circuit short to ground | Short to GND in wiring harness between BCM and rear wiper and washer switch (INT)
B2177 | Intruder sensor circuit failure | Short to GND in wiring harness between BCM and intruder sensor
B1520 | bonnet switch circuit open | Open circuit in wiring harness between BCM and bonnet switch
B1506 | Turn light signal circuit short to ground | Short to GND in wiring harness between BCM and turn switch
B1311 | Unlock switch circuit open | Open circuit in wiring harness between BCM and driver-side door lock-link switch (unlock signal)

## PID/Data Monitor Function

• The PID/data monitor function is used for optionally selecting input/output signal monitor items preset in the BCM and reading them out in real-time.

PID/data monitor item | Unit/Condition (Tester display) | Input/output part | BCM terminal
--- | --- | --- | ---
CCNT_GE | - | DTC | -
HOOD_SW | OPEN/CLOSE | bonnet switch | 8M
TR/LG_SW | OPEN/CLOSE | Trunk compartment light switch | 2F
DRSW_REAR | OPEN/CLOSE | Rear door switch (LH/RH) | 7D, 1F
DRSW_P | OPEN/CLOSE | Front door switch (passenger's side) | 7F
DRSW_D | OPEN/CLOSE | Front door switch (driver's side) | 7B
HAZARD | On/Off | Hazard warning switch | 4G
WPINT_REAR | On/Off | Rear wiper switch (INT position) | 4I
TURN_SW_R | On/Off | Turn switch (RH) | 4E
TURN_SW_L | On/Off | Turn switch (LH) | 4C
LLSW_D | LOCK/UNLOCK | Driver-side door lock-link switch | 7C, 7E
LLSW_P_R | LOCK/UNLOCK | Except driver-side door lock-link switch | 7G