ON-BOARD DIAGNOSTIC FUNCTION

id094000101700

• 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