TERMINALS OF ECU
1. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY
(a) Disconnect the D47 air conditioning amplifier assembly connector.
(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 connector disconnected.
Tester Connection |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
D47-1 (IG+) - D47-14 (GND) |
Y - W |
Power source (IG) |
Ignition switch ON |
11 to 14 V |
D47-1 (IG+) - D47-14 (GND) |
Y - W |
Power source (IG) |
Ignition switch off |
Below 1 V |
D47-21 (B) - D47-14 (GND) |
V - W |
Power source (Back-up) |
Always |
11 to 14 V |
D47-14 (GND) - Body ground |
W - 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 D47 air conditioning amplifier assembly connector.
(d) Measure the voltage and check for pulses according to the value(s) in the table below.
Tester Connection |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
D47-18 (D) - D47-14 (GND) |
G - W |
Rear defogger signal |
Ignition switch ON, rear window defogger switch off |
11 to 14 V |
D47-18 (D) - D47-14 (GND) |
G - W |
Rear defogger signal |
Ignition switch on, rear window defogger switch ON |
Below 1 V |
D47-37 (LIN1) - D47-14 (GND) |
SB - W |
LIN communication line |
Ignition switch ON |
Pulse generation |
If the result is not as specified, the air conditioning amplifier assembly may have a malfunction.
2. CHECK AIR CONDITIONING CONTROL ASSEMBLY
(a) Disconnect the E3 air conditioning control assembly connector.
(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 connector disconnected.
Tester Connection |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
E3-4 (IG+) - E3-5 (GND) |
GR - W |
Power source (IG) |
Ignition switch ON |
11 to 14 V |
E3-4 (IG+) - E3-5 (GND) |
GR - W |
Power source (IG) |
Ignition switch off |
Below 1 V |
E3-5 (GND) - Body ground |
W - 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 E3 air conditioning control assembly connector.
(d) Check for pulses according to the value(s) in the table below.
Tester Connection |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
E3-2 (LIN1) - E3-5 (GND) |
SB - W |
LIN communication line |
Ignition switch ON |
Pulse generation |
If the result is not as specified, the air conditioning control assembly may have a malfunction.
System Description
SYSTEM DESCRIPTION
1. POWER DOOR LOCK CONTROL SYSTEM DESCRIPTION
(a) The power door lock system locks/unlocks all doors.
The door control switch sends "lock/unlock" request signals to the main body
ECU (driver side junction block assembly). Then ...
Precaution
PRECAUTION
1. NOTICE FOR INITIALIZATION:
NOTICE:
When disconnecting the cable from the negative (-) battery terminal, initialize
the following systems after the cable is reconnected.
System Name
See Procedure
Back D ...
Unlock Warning Switch Circuit
DESCRIPTION
The key unlock warning switch assembly turns on when the ignition key is inserted
into the ignition key cylinder and turns off when the ignition key is removed.
The main body ECU (driver side junction block assembly) operates the key confinemen ...