FOREWORD [BCM]
- If there is any vehicle malfunction complaint lodged by a customer, perform malfunction diagnosis according to the troubleshooting procedure.
Troubleshooting Procedure Flowchart. Scheme 34
*1 CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [MULTIPLEX COMMUNICATION SYSTEM]
Scheme 35
Scheme 36
- If the malfunction does not recur, verify the malfunction cause by performing the following actions: Based on the repair order form, attempt to drive the vehicle or perform tests to replicate the malfunction, record the data (such as BCM circuit voltage) at that time, and detect the malfunction cause. Shake the wiring harness or connector of the electrical component which is suspected to be the cause of the malfunction, and inspect for malfunction or occurrence of any DTCs. (Scheme 35): Shaking Wiring Harness Or Connector Of Electrical Component Inspect the female terminals on the connector of the electric component which is suspected to be the cause of the malfunction for poor connection. (Scheme 36): Inspecting Female Terminals On Connector Of Electric Component
Scheme 37
![Scheme 37: DTC INSPECTION [BCM]](https://i.diagnostdata.com/repair/3b/3bb7bfad4df80ca57dbeba6421424d122a95a4ebe08cce104776d8312b43e4fe.webp)
- Connect the M-MDS (IDS) to the DLC-2. (Scheme 37): Identifying DLC-2 Location
- Verify the following vehicle conditions: All the switches are turned off (except the ignition switch). All the doors, hood, and trunk (4SD)/liftgate (5HB) are closed. All the doors, and trunk (4SD)/liftgate (5HB) are unlocked. All the seat belts are unbuckled. Parking brake lever is pulled.
- After the vehicle is identified, select the following items from the initialization screen of the IDS. Select "Self Test". Select "Modules". Select "BCM/GEM".
- Verify the DTC according to the directions on the screen. If any DTCs are displayed, perform troubleshooting according to the corresponding DTC inspection.
- After completion of repairs, clear all DTCs stored in the BCM. (See «CLEARING DTC [BCM]»(ref-579384-S03398474482013100700000).)
CLEARING DTCS [BCM]
- Connect the M-MDS (IDS) to the DLC-2. see scheme 9: Identifying DLC-2 Location
- After the vehicle is identified, select the following items from the initialization screen of the IDS. Select "Self Test". Select "Modules". Select "BCM/GEM".
- Verify the DTC according to the directions on the screen.
- Press the clear button on the DTC screen to clear the DTC.
- Switch the ignition to off.
- Switch the ignition to ON and wait for 5 s or more.
- Perform DTC inspection. (See «DTC INSPECTION [BCM]»(ref-579384-S41521314722013100700000).)
- Verify that no DTCs are displayed.
| DESCRIPTION | Error signal from keyless receiver |
|---|---|
| DETECTION CONDITION | BCM receives the error signal from keyless receiver continuously 12 times . |
| POSSIBLE CAUSE | Keyless receiver malfunction BCM malfunction |
| DESCRIPTION | Error signal from keyless receiver |
|---|---|
| DETECTION CONDITION | BCM receives the error signal from keyless receiver continuously 12 times . |
| POSSIBLE CAUSE | Keyless control module DTC is stored. Keyless receiver malfunction Keyless control module malfunction BCM malfunction |
DESCRIPTION Communication error between keyless receiver and BCM DETECTION CONDITION BCM cannot receive the signal from keyless receiver continuously 12 times . POSSIBLE CAUSE Keyless receiver connector or terminals malfunction BCM connector or terminals malfunction Short to ground in wiring harness between keyless receiver terminal D and BCM terminal 4K Open circuit in wiring harness between keyless receiver terminal D and BCM terminal 4K Keyless receiver malfunction BCM malfunction
Scheme 38
DESCRIPTION Communication error between keyless receiver and BCM DETECTION CONDITION BCM cannot receive the signal from keyless receiver continuously 12 times . POSSIBLE CAUSE Keyless control module DTC is stored. Keyless receiver connector or terminals malfunction Keyless control module connector or terminals malfunction Short to ground in wiring harness between keyless receiver terminal C and keyless control module terminal 3W Open circuit in wiring harness between keyless receiver terminal C and keyless control module terminal 3W BCM connector or terminals malfunction Short to ground in wiring harness between keyless control module terminal 3X and BCM terminal 4K Open circuit in wiring harness between keyless control module terminal 3X and BCM terminal 4K Keyless receiver malfunction Keyless control module malfunction BCM malfunction
Scheme 39
4SD
DESCRIPTION Trunk lid latch switch circuit malfunction DETECTION CONDITION Short to ground in the trunk lid latch switch circuit with the trunk closed (trunk lid latch switch off). POSSIBLE CAUSE Trunk lid latch and release actuator connector or terminals malfunction Trunk lid latch switch malfunction BCM connector or terminals malfunction Short to ground in wiring harness between trunk lid latch and release actuator terminal C and BCM terminal 6F BCM malfunction
Scheme 40
5HB
DESCRIPTION Liftgate latch switch circuit malfunction DETECTION CONDITION Short to ground in the liftgate latch switch circuit with the liftgate closed (liftgate latch switch off). POSSIBLE CAUSE Liftgate latch and lock actuator connector or terminals malfunction Liftgate latch switch malfunction BCM connector or terminals malfunction Short to ground in wiring harness between liftgate latch and lock actuator terminal C and BCM terminal 6F BCM malfunction
Scheme 41
FS5A-EL
DESCRIPTION TR switch circuit malfunction DETECTION CONDITION Short to power supply in the TR switch circuit with the selector lever in P or N position. POSSIBLE CAUSE TR switch connector or terminals malfunction BCM connector or terminals malfunction Short to power supply in wiring harness between TR switch terminal D and BCM terminal 1Q TR switch malfunction BCM malfunction *1 Vehicles without advanced keyless entry and push button start system *2 Vehicles with advanced keyless entry and push button start system
Scheme 42
FW6A-EL
DESCRIPTION Back-up light relay circuit malfunction DETECTION CONDITION Short to power supply in the back-up light relay circuit with the selector lever in P or N position. POSSIBLE CAUSE Back-up light relay malfunction BCM connector or terminals malfunction Short to power supply in wiring harness between back-up light relay terminal C and BCM terminal 1Q BCM malfunction *1 Vehicles without advanced keyless entry and push button start system *2 Vehicles with advanced keyless entry and push button start system
MTX
DESCRIPTION Back-up light switch circuit malfunction DETECTION CONDITION Short to power supply in the back-up light switch circuit with the shift lever in neutral position. POSSIBLE CAUSE Back-up light switch connector or terminals malfunction BCM connector or terminals malfunction Short to power supply in wiring harness between back-up light switch terminal B and BCM terminal 1Q Back-up light switch malfunction BCM malfunction *1 Vehicles without advanced keyless entry and push button start system *2 Vehicles with advanced keyless entry and push button start system
PID/DATA MONITOR TABLE [BCM]
| PID name | Unit/Status | Description | Inspection item |
|---|---|---|---|
| AUTO_L_SW *1 | Off/On | Off: Light switch is not at AUTO position. On: Light switch is at AUTO position. | Light switch |
| BRK_FLUID | NORMAL/LOW | NORMAL: Brake fluid level is above MIN. LOW: Brake fluid level is less than MIN. | Brake fluid level sensor |
| DRSW_D | Close/OPEN | Close: Front door (LH) is closed. OPEN: Front door (LH) is opened. | Front door latch switch (LH) |
| DRSW_LR | Close/OPEN | Close: Rear door (LH) is closed. OPEN: Rear door (LH) is opened. | Rear door latch switch (LH) |
| DRSW_P | Close/OPEN | Close: Front door (RH) is closed. OPEN: Front door (RH) is opened. | Front door latch switch (RH) |
| DRSW_RR | Close/OPEN | Close: Rear door (RH) is closed. OPEN: Rear door (RH) is opened. | Rear door latch switch (RH) |
| FOG_F_SW | Off/On | Off: Front fog light switch is in off position. On: Front fog light switch is in on position. | Front fog light switch |
| H/L_HI_SW | Off/On | Off: Light switch is not at HI position. On: Light switch is at HI position. | Light switch |
| HAZARD | Off/On | Off: Hazard warning switch is off. On: Hazard warning switch is on. | Hazard warning switch |
| HOOD_SW *2 | Close/OPEN | Close: Hood is closed. OPEN: Hood is opened. | Hood latch switch |
| KEY_LOCK_SW | Off/Lock | Off: Front door key cylinder switch (LH) is not at LOCK position. Lock: Front door key cylinder switch (LH) is at LOCK position. | Front door key cylinder switch (LH) |
| KEY_UNLK_SW | Off/Unlock | Off: Front door key cylinder switch (LH) is not at UNLOCK position. Unlock: Front door key cylinder switch (LH) is at UNLOCK position. | Front door key cylinder switch (LH) |
| PRK_BRK | Off/On | Off: Parking brake lever is released. On: Parking brake lever is pulled. | Parking brake switch |
| R_DEF_SW | Off/On | Off: Rear window defroster switch is off. On: Rear window defroster switch is on. | Climate control unit |
| R_GEAR_SW | Not_R/R | ATX Not_R: Selector lever is not at R position. R: Selector lever is at R position. MTX Not_R: Shift lever is not at reverse position. R: Shift lever is at reverse position. | FS5A-EL TR switch FW6A-EL Back-up light relay MTX Back-up light switch |
| TNS_SW | Off/On | Off: Light switch is not at TNS position. On: Light switch is at TNS position. | Light switch |
| TR/LG_SW | Close/OPEN | Close: Trunk (4SD)/Liftgate (5HB) is closed. OPEN: Trunk (4SD)/Liftgate (5HB) is opened. | 4SD Trunk lid latch switch 5HB Liftgate latch switch |
| TURN_SW_L | Off/On | Off: Turn switch is not at LEFT position. On: Turn switch is at LEFT position. | Turn switch |
| TURN_SW_R | Off/On | Off: Turn switch is not at RIGHT position. On: Turn switch is at RIGHT position. | Turn switch |
| VPWR | V | Indicate the BCM power supply voltage. | Battery |
| WASHER_F | Off/On | Off: Windshield washer switch is off. On: Windshield washer switch is on. | Windshield washer switch |
| WASHER_R *3 | Off/On | Off: Rear washer switch is off. On: Rear washer switch is on. | Rear washer switch |
| WIP_F_HI | Off/On | Off: Windshield wiper switch is not at HI position. On: Windshield wiper switch is at HI position. | Windshield wiper switch |
| WIP_F_INT | Off/On | Off: Windshield wiper switch is not at INT position. On: Windshield wiper switch is at INT position. | Windshield wiper switch |
| WIP_F_LO | Off/On | Off: Windshield wiper switch is not at LO position. On: Windshield wiper switch is at LO position. | Windshield wiper switch |
| WIP_F_PPOS | Off/On | Off: Auto stop switch is off. On: Auto stop switch is on. | Windshield wiper motor |
| WIP_R_INT *3 | Off/On | Off: Rear wiper switch is not at INT position. On: Rear wiper switch is at INT position. | Rear wiper switch |
| WIP_R_ON *3 | Off/On | Off: Rear wiper switch is not at ON position. On: Rear wiper switch is at ON position. | Rear wiper switch |
| *1 Vehicles with auto light system *2 Vehicles with theft-deterrent system *3 5HB | |||