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.
Operation Check
OPERATION CHECK
1. CHECK WINDOW LOCK SWITCH
HINT:
Before performing the window lock switch operation check, make sure that the
window lock switch is off (the switch is not pushed in).
(a) Check that the front passenger and rear windows cannot be operat ...
Ignition Coil "A" Primary / Secondary Circuit (P0351-P0354)
DESCRIPTION
HINT:
These DTCs indicate malfunctions relating to the primary circuit.
If DTC P0351 is output, check the No. 1 ignition coil circuit.
If DTC P0352 is output, check the No. 2 ignition coil circuit.
If DTC P0353 is output, c ...
Taillight Relay Circuit
DESCRIPTION
The main body ECU (driver side junction block assembly) controls the operation
of the TAIL relay.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following
inspec ...