TERMINALS OF ECU
1. CHECK POWER BACK DOOR ECU (POWER BACK DOOR MOTOR UNIT) (w/ POWER BACK DOOR SYSTEM)
(a) Disconnect the L20 power back door ECU connector.
(b) Measure the voltage and resistance according to the value(s) in the table below.
Tester Connection |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
L20-12 (B) - Body ground |
LG - Body ground |
Battery power supply |
Always |
11 to 14 V |
L20-10 (ECUB) - Body ground |
P - Body ground |
Battery power supply |
Always |
11 to 14 V |
L20-8 (IG) - Body ground |
SB - Body ground |
IG power supply |
Ignition switch ON |
11 to 14 V |
L20-8 (IG) - Body ground |
SB - Body ground |
IG power supply |
Ignition switch off |
Below 1 V |
L20-11 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
If the result is not as specified, there may be a malfunction in the wire harness.
(c) Reconnect the L20 power back door ECU connector.
(d) Initialize the power back door system (See page ).
(e) Measure the voltage according to the value(s) in the table below.
Tester Connection |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
L20-2 (DC+) - L20-1 (DC-) |
L - G |
Back door lock motor circuit |
Back door lock motor operating |
11 to 14 V |
L20-2 (DC+) - L20-1 (DC-) |
L - G |
Back door lock motor circuit |
Back door lock motor not operating |
Below 1 V |
L20-20 (FUL) - Body ground |
GR - Body ground |
Back door courtesy switch circuit |
Back door closed |
11 to 14 V |
L20-20 (FUL) - Body ground |
GR - Body ground |
Back door courtesy switch circuit |
Back door open |
Below 1 V |
L20-22 (HAF) - Body ground |
LG - Body ground |
Back door lock half-latch switch signal circuit |
Back door open → Back door closer operates → Back door closed |
Below 1 V → 11 to 14 V → Below 1 V |
L20-24 (POS) - Body ground |
P - Body ground |
Back door lock position switch signal circuit |
Back door open → Back door closer operates → Back door closed |
Below 1 V → 11 to 14 V → Below 1 V |
If the result is not as specified, the ECU may have a malfunction.
2. BACK DOOR CLOSER ECU (MULTIPLEX NETWORK DOOR ECU) (w/o POWER BACK DOOR SYSTEM)
(a) Disconnect the L21 back door closer ECU connector.
(b) Measure the voltage and resistance according to the value(s) in the table below.
Tester Connection |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
L21-4 (B) - Body ground |
LG - Body ground |
Battery power supply |
Always |
11 to 14 V |
L21-16 (ECUB) - Body ground |
P - Body ground |
Battery power supply |
Always |
11 to 14 V |
L21-15 (IG) - Body ground |
SB - Body ground |
IG power supply |
Ignition switch ON |
11 to 14 V |
L21-15 (IG) - Body ground |
SB - Body ground |
IG power supply |
Ignition switch off |
Below 1 V |
L21-3 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
If the result is not as specified, there may be a malfunction in the wire harness.
(c) Reconnect the L21 back door closer ECU connector.
(d) Measure the voltage according to the value(s) in the table below.
Tester Connection |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
L21-2 (DC+) - L21-1 (DC-) |
L - G |
Back door lock motor circuit |
Back door lock motor operating |
11 to 14 V |
L21-2 (DC+) - L21-1 (DC-) |
L - G |
Back door lock motor circuit |
Back door lock motor not operating |
Below 1 V |
L21-6 (FUL) - Body ground |
GR - Body ground |
Back door courtesy switch circuit |
Back door closed |
11 to 14 V |
L21-6 (FUL) - Body ground |
GR - Body ground |
Back door courtesy switch circuit |
Back door open |
Below 1 V |
L21-5 (HAF) - Body ground |
LG - Body ground |
Back door lock half-latch switch signal circuit |
Back door open → Back door closer operates → Back door closed |
Below 1 V → 11 to 14 V → Below 1 V |
L21-7 (POS) - Body ground |
P - Body ground |
Back door lock position switch signal circuit |
Back door open → Back door closer operates → Back door closed |
Below 1 V → 11 to 14 V → Below 1 V |
If the result is not as specified, the ECU may have a malfunction.
3. CHECK MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)
(a) Disconnect the D49 and 2F connectors.
(b) Measure the resistance according to the value(s) in the table below.
Tester Connection |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
D49-2 (BDSU) - Body ground |
GR - Body ground |
Back door opener switch signal circuit |
Back door opener switch on |
Below 1 Ω |
D49-2 (BDSU) - Body ground |
GR - Body ground |
Back door opener switch signal circuit |
Back door opener switch off |
10 kΩ or higher |
2F-16 (GND1) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
If the result is not as specified, there may be a malfunction on the wire harness side.
(c) Reconnect the D49 and 2F connectors.
(d) Measure the voltage according to the value(s) in the table below.
Tester Connection |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
D49-2 (BDSU) - Body ground |
GR - Body ground |
Back door opener switch signal circuit |
Back door opener switch off |
Pulse generation |
D49-2 (BDSU) - Body ground |
GR - Body ground |
Back door opener switch signal circuit |
Back door opener switch on |
Below 1 V |
If the result is not as specified, the ECU may have a malfunction.
Door Side Airbag Sensor LH Malfunction (B1695/16)
DESCRIPTION
The side collision sensor LH circuit (to determine deployment of the front seat
side airbag assembly LH and curtain shield airbag assembly LH) is composed of the
center airbag sensor assembly, rear airbag sensor LH and side airbag sensor LH.
...
Check Mode Procedure
CHECK MODE PROCEDURE
1. CHECK MODE (SIGNAL CHECK): DTC CHECK
(a) Turn the ignition switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON.
(d) Turn the Techstream on.
(e) Enter the following menus: Body Electrical / SRS Ai ...
Diagnosis System
DIAGNOSIS SYSTEM
1. DESCRIPTION
(a) The certification ECU (smart key ECU assembly) and ECM control the vehicle
engine immobiliser system functions. Engine immobiliser system data and Diagnostic
Trouble Codes (DTCs) can be read through the vehicle Data Li ...