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
|
J19-37 (LIN1) - J19-14 (GND)
|
SB - W-B
|
LIN communication signal
|
Ignition switch ON
|
Pulse generation
|
J19-14 (GND) - Body ground
|
W-B - Body ground
|
Ground
|
Always
|
Below 1 Ω
|
(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
|
J19-40 (D) - J19-14 (GND)
|
LG - W-B
|
Deicer relay
|
Ignition switch ON, windshield deicer switch off
|
11 to 14 V
|
Ignition switch ON, windshield deicer 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
|
|