Component Location
General Description
All 13 units which consists of the Body Electrical Control System are linked by CAN*¹ line.
They are IPM(Inter Panel Module), FAM(Front Area Module), PDM(Power Distribution Module), DDM(Drive Door Module), ADM(Assist Door Module), ECW(Electronic Control Wiper), CLU(Cluster), MFSW(Multi Function Switch), PSM(Power Seat Module), SCM(Steering Control Module), PTM(Power Trunk Lid Module), FBWS(Front Back Warning System), DATC(Dual Auto Temperature Control Module).
*¹ CAN (Controller Area Network) : CAN is serial bus communication type which links not only communication system but also control units each other.
*² LIN (Local Interconnect Network) : LIN is serial communication type which is used in electrical control system. (This is less expensive.)
DTC Description
Type | Condition | Remark |
1 | CANH Circuit Open | B1602 is presented when IC detects one of errors among 7 types under normal communication condition. According to operation condition, some of module which are connected to CAN line may not detect B1602. Also, B1603 can be detected together. |
2 | CANL Circuit Open |
3 | CANH Circuit Short to Power |
4 | CANL Circuit Short to Power |
5 | CANH Circuit Short to Ground |
6 | CANL Circuit Short to Ground |
7 | CANH and CANL Short to each other |
DTC Detecting Condition
Item | Detecting Condition | Possible Cause |
DTC Strategy | CAN Communication Check
| IPM,PSM are not Sleep condition 1. CAN High Line short to battery 2. CAN Low Line short to battery 3. CAN High Line short to ground 4. CAN Low Line short to ground 5. CAN High and Low line short to each other 6. CAN High Line short to 5V power 7. CAN High Line open 8. CAN Low Line open Under Sleep condition, CAN High Line is 0V and CAN Low Line is battery voltage.
|
Enable Conditions | IPM, PSM power on (Under normal communication)
|
Threshold Value | CAN high : 0V or B+
CAN low : 0V or B+
|
Diagnostic Time | 2 sec
|
DTC Erasing Time | DTC is erased immediately after trouble fixed
|
Diagnostic Circuit Diagram
Signal Waveform & Data
Fig.1) CAN Low/High Signal Waveform
Fig.2) CAN BUS VOLTAGE LEVEL (LOW SPEED CAN)