TERMINALS OF ECU
CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
*A |
Main Body ECU (Multiplex Network Body ECU) with 2 Connectors |
- |
- |
*1 |
Main Body ECU (Multiplex Network Body ECU) |
- |
- |
*a |
2 Connectors |
- |
- |
*A |
Main Body ECU (Multiplex Network Body ECU) with 1 Connector |
- |
- |
*1 |
Main Body ECU (Multiplex Network Body ECU) |
- |
- |
*a |
1 Connector |
- |
- |
(a) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
Click here
(b) Reconnect the instrument panel junction block assembly connectors.
(c) Measure the resistance and voltage according to the value(s) in the table below.
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
MB-11 (GND1) - Body ground |
- |
Ground |
Always |
Below 1 Ω |
MB-31 (BECU) - Body ground |
- |
Battery power supply |
Always |
11 to 14 V |
MB-30 (ACC) - Body ground |
- |
ACC power supply |
Ignition switch ACC |
11 to 14 V |
MB-30 (ACC) - Body ground |
- |
ACC power supply |
Ignition switch off |
Below 1 V |
MB-32 (IG) - Body ground |
- |
IG power supply |
Ignition switch ON |
11 to 14 V |
MB-32 (IG) - Body ground |
- |
IG power supply |
Ignition switch off |
Below 1 V |
(d) Install the main body ECU (multiplex network body ECU) to the instrument panel junction block assembly.
Click here
(e) Measure the voltage according to the value(s) in the table below.
Tester Connection |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
3H-8 (ACT-) - Body ground |
LA-B - Body ground |
Door lock motor unlock drive output |
Door control switch or driver door key cylinder off |
Below 1 V |
3H-8 (ACT-) - Body ground |
LA-B - Body ground |
Door lock motor unlock drive output |
Door control switch or driver door key cylinder unlocked |
11 to 14 V |
3H-9 (ACT-) - Body ground |
B - Body ground |
Door lock motor unlock drive output |
Door control switch or driver door key cylinder off |
Below 1 V |
3H-9 (ACT-) - Body ground |
B - Body ground |
Door lock motor unlock drive output |
Door control switch or driver door key cylinder unlocked |
11 to 14 V |
3H-6 (ACT+) - Body ground |
R - Body ground |
Door lock motor lock drive output |
Door control switch or driver door key cylinder off |
Below 1 V |
3H-6 (ACT+) - Body ground |
R - Body ground |
Door lock motor lock drive output |
Door control switch or driver door key cylinder locked |
11 to 14 V |
3H-18 (ACT+) - Body ground |
R - Body ground |
Door lock motor lock drive output |
Door control switch or driver door key cylinder off |
Below 1 V |
3H-18 (ACT+) - Body ground |
R - Body ground |
Door lock motor lock drive output |
Door control switch or driver door key cylinder locked |
11 to 14 V |
3D-4 (ACTD) - Body ground |
B - Body ground |
Door lock motor unlock drive output |
Door control switch or driver door key cylinder off → on (unlock) |
Below 1 V → 11 to 14 V → Below 1 V |
F15-6 (FLCY) - Body ground |
R - Body ground |
Front door courtesy light switch (for LH) input |
Front door LH open |
Below 1 V |
F15-6 (FLCY) - Body ground |
R - Body ground |
Front door courtesy light switch (for LH) input |
Front door LH closed |
Pulse generation |
F15-27 (FRCY) - Body ground |
BR - Body ground |
Front door courtesy light switch (for RH) input |
Front door RH open |
Below 1 V |
F15-27 (FRCY) - Body ground |
BR - Body ground |
Front door courtesy light switch (for RH) input |
Front door RH closed |
Pulse generation |
3H-24 (LCTY) - Body ground |
BR - Body ground |
Rear door courtesy light switch (for LH) input |
Rear door LH open |
Below 1 V |
3H-24 (LCTY) - Body ground |
BR - Body ground |
Rear door courtesy light switch (for LH) input |
Rear door LH closed |
Pulse generation |
3A-31 (RCTY) - Body ground |
BR - Body ground |
Rear door courtesy light switch (for RH) input |
Rear door RH open |
Below 1 V |
3A-31 (RCTY) - Body ground |
BR - Body ground |
Rear door courtesy light switch (for RH) input |
Rear door RH closed |
Pulse generation |
3D-13 (LSFL) - Body ground |
B - Body ground |
Front door LH unlock detection switch input |
Front door LH unlocked |
Below 1 V |
3D-13 (LSFL) - Body ground |
B - Body ground |
Front door LH unlock detection switch input |
Front door LH locked |
Pulse generation |
3D-12 (LSFR) - Body ground |
GR - Body ground |
Front door RH unlock detection switch input |
Front door RH unlocked |
Below 1 V |
3D-12 (LSFR) - Body ground |
GR - Body ground |
Front door RH unlock detection switch input |
Front door RH locked |
Pulse generation |
3D-14 (LSR) - Body ground |
LG - Body ground |
Rear door LH/RH unlock detection switch input |
Rear door LH or RH unlocked |
Below 1 V |
3D-14 (LSR) - Body ground |
LG - Body ground |
Rear door LH/RH unlock detection switch input |
Rear door LH and RH locked |
Pulse generation |
F15-5 (PRG) - Body ground |
GR - Body ground |
Signal output to door control and tire pressure monitoring system receiver assembly |
Key inserted into ignition key cylinder → Key pulled out of ignition key cylinder |
11 to 14 V → Pulse generation → 11 to 14 V |
F15-4 (RDA) - Body ground |
LG - Body ground |
Signal input from door control and tire pressure monitoring system receiver assembly |
Ignition switch off, all doors closed and door control transmitter assembly switch not pressed |
11 to 14 V |
Ignition switch off, all doors closed and door control transmitter assembly switch pressed |
Pulse generation (0 to 12 V) |
|||
3A-41 (KSW) - Body ground |
V - Body ground |
Key unlock warning switch input |
No key in ignition key cylinder |
Pulse generation |
3A-41 (KSW) - Body ground |
V - Body ground |
Key unlock warning switch input |
Key in ignition key cylinder |
Below 1 V |
3F-29 (BZR) - Body ground*1 |
L - Body ground |
Wireless door lock buzzer signal |
Wireless door lock buzzer off |
Below 1 V |
3F-29 (BZR) - Body ground*1 |
L - Body ground |
Wireless door lock buzzer signal |
Wireless door lock buzzer on |
Pulse generation |
If the result is not as specified, the main body ECU (multiplex network body ECU) or instrument panel junction block assembly may be malfunctioning.
CHECK DOOR CONTROL AND TIRE PRESSURE MONITORING SYSTEM RECEIVER ASSEMBLY
(a) Disconnect the M23 door control and tire pressure monitoring system receiver assembly.
(b) Measure the voltage and resistance according to the value(s) in the table below.
HINT:
Measure the values on the wire harness side with the connectors disconnected.
Tester Connection |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
M23-7 (+B) - Body ground |
R - Body ground |
Battery power supply |
Always |
11 to 14 V |
M23-12 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
(c) Reconnect the M23 door control and tire pressure monitoring system receiver assembly.
(d) Measure the voltage according to the value(s) in the table below.
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
M23-5 (PRG) - M23-12 (GND) |
W - W-B |
Signal input from main body ECU (multiplex network body ECU) |
Key inserted into ignition key cylinder → Key pulled out of ignition key cylinder |
11 to 14 V → Pulse generation → 11 to 14 V |
M23-4 (RDA) - M23-12 (GND) |
G - W-B |
Signal output to main body ECU (multiplex network body ECU) |
Ignition switch off, all doors closed and door control transmitter assembly switch not pressed |
11 to 14 V |
Ignition switch off, all doors closed and door control transmitter assembly switch pressed |
Pulse generation (0 to 12 V) |
Toyota CH-R Service Manual > Blind Spot Monitor System: Blind Spot Monitor Master Module (C1AB6)
DESCRIPTION
This DTC is stored when the blind spot monitor sensor LH (Master) detects an
internal malfunction.
DTC No.
Detection Item
DTC Detection Condition
Trouble Area
C1AB6
Blind Spot Monitor Master Module
The ...
Toyota CH-R Service Manual > Vehicle Stability Control System: Motor Circuit Malfunction (C1428)
DESCRIPTION
This DTC is stored when the skid control ECU (brake actuator assembly) judges
that an abnormality occurred in the circuit used to operate the pump motor.
DTC No.
Detection Item
DTC Detection Condition
Trouble Area
C1428
...