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.
Data Signal Circuit between Navigation Receiver Assembly and Extension Module
DESCRIPTION
The stereo component tuner assembly sends the image data signal to the navigation
receiver assembly via this circuit.
WIRING DIAGRAM
PROCEDURE
1.
CHECK NAVIGATION WIRE
(a) Remove the navigation wire (See pag ...
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DESCRIPTION
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