TERMINALS OF ECU
1. CHECK AIR CONDITIONING AMPLIFIER
(a) Disconnect the J19 air conditioning amplifier connector.
(b) Measure the resistance and voltage according to the value(s) in the table
below.
|
Terminal No. (Symbol)
|
Wiring Color
|
Terminal Description
|
Condition
|
Specified Condition
|
|
J19-1 (IG+) - J19-14 (GND)
|
B - W-B
|
Ignition power supply
|
Ignition switch ON
|
11 to 14 V
|
|
Ignition switch OFF
|
Below 1 V
|
|
J19-21 (B) - J19-14 (GND)
|
GR - W-B
|
Battery power source
|
Always
|
11 to 14 V
|
|
J19-14 (GND) - Body ground
|
W-B - Body ground
|
Ground
|
Always
|
Below 1 Ω
|
|
J19-37 (LIN1) - J19-14 (GND)
|
SB - W-B
|
LIN communication signal
|
Ignition switch ON
|
Pulse generation
|
(c) Reconnect the J19 air conditioning amplifier connector.
(d) Measure the voltage according to the value(s) in the table below.
|
Terminal No. (Symbol)
|
Wiring Color
|
Terminal Description
|
Condition
|
Specified Condition
|
|
J19-38 (RDEF) - J19-14 (GND)
|
Y - W-B
|
Defogger relay
|
Ignition switch ON, rear window defogger switch off
|
11 to 14 V
|
|
Ignition switch ON, rear window defogger switch on
|
Below 1 V
|
2. CHECK AIR CONDITIONING CONTROL ASSEMBLY
(a) Disconnect the J127 air conditioning control assembly connector.
(b) Measure the voltage and resistance according to the value(s) in the table
below.
|
Terminal No. (Symbol)
|
Wiring Color
|
Terminal Description
|
Condition
|
Specified Condition
|
|
J127-4 (IG+) - J127-5 (GND)
|
Y - W-B
|
Ignition power supply
|
Ignition switch ON
|
11 to 14 V
|
|
Ignition switch OFF
|
Below 1 V
|
|
J127-5 (GND) - Body ground
|
W-B - Body ground
|
Ground
|
Always
|
Below 1 Ω
|
|
J127-7 (STX) - J127-5 (GND)
|
SB - W-B
|
LIN communication signal
|
Ignition switch ON
|
Pulse generation
|
| 
