DESCRIPTION
The automatic light control sensor (solar sensor), which is installed on the upper side of the instrument panel, detects sunlight and controls the air conditioning in auto mode. The output current from the solar sensor varies according to the amount of sunlight. When the amount of sunlight increases, the output current increases. As the amount of sunlight decreases, the output current decreases. The air conditioning amplifier assembly detects the output current from the solar sensor.
DTC Code |
DTC Detection Condition |
Trouble Area |
---|---|---|
B14A3 |
An open or short in the passenger side solar sensor circuit. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
HINT:
PROCEDURE
1. |
READ VALUE USING TECHSTREAM (SOLAR SENSOR) |
(a) Use the Data List to check if the automatic light control sensor (solar sensor) is functioning properly (See page ).
Tester Display |
Measurement Item/Rang |
Normal Condition |
Diagnostic Note |
---|---|---|---|
Solar Sensor (P side) |
Automatic light control sensor (solar sensor) / Min.: 0, Max.: 255 |
Passenger side solar sensor voltage increases as brightness increases |
Open in the circuit: 0. Short in the circuit: 255. |
OK:
The display is as specified in the normal condition column.
Result
Result |
Proceed to |
---|---|
OK (When troubleshooting according to problem symptoms table) |
A |
OK (When troubleshooting according to the DTC) |
B |
NG |
C |
A |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
B |
REPLACE AIR CONDITIONING AMPLIFIER ASSESMBLY |
|
2. |
CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) |
(a) Disconnect the G2 sensor connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
G2-6 (CLTB) - G2-3 (CLTE) |
Ignition switch off |
Below 1 V |
G2-6 (CLTB) - G2-3 (CLTE) |
Ignition switch ON |
11 to 14 V |
*a |
Front view of wire harness connector (to Automatic Light Control Sensor [Solar Sensor]) |
NG |
GO TO STEP 5 |
|
3. |
CHECK HARNESS AND CONNECTOR (SOLAR SENSOR - AIR CONDITIONING AMPLIFIER) |
(a) Disconnect the G2 sensor connector.
(b) Disconnect the F42 amplifier connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
G2-2 (TSR) - F42-32 (TSP) |
Always |
Below 1 Ω |
G2-2 (TSR) - Body ground |
Always |
10 kΩ or higher |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
4. |
CHECK AUTOMATIC LIGHT CONTROL SENSOR (SOLAR SENSOR) |
(a) Remove the automatic light control sensor (solar sensor) with its connector still connected (See page ). |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
G2-2 (TSR) - G2-3 (CLTE) |
Ignition switch ON Sensor subjected to electric light |
0.8 to 4.3 V |
G2-2 (TSR) - G2-3 (CLTE) |
Ignition switch ON Sensor covered with cloth |
Below 0.8 V |
*a |
Component with harness connected (Automatic Light Control Sensor [Solar Sensor]) |
NOTICE:
The connection procedure for using a digital tester such as a TOYOTA electrical tester is shown above. When using an analog tester, connect the negative (-) lead to terminal 2 and the positive (+) lead to terminal 3 of the solar sensor.
HINT:
OK |
REPLACE AIR CONDITIONING AMPLIFIER ASSESMBLY |
NG |
REPLACE AUTOMATIC LIGHT CONTROL SENSOR (SOLAR SENSOR) |
5. |
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - SOLAR SENSOR) |
(a) Disconnect the F9 ECU connector.
(b) Disconnect the G2 sensor connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F9-22 (CLTE) - G2-3 (CLTE) |
Always |
Below 1 Ω |
F9-20 (CLTB) - G2-6 (CLTB) |
Always |
Below 1 Ω |
F9-22 (CLTE) - Body ground |
Always |
10 kΩ or higher |
F9-20 (CLTB) - Body ground |
Always |
10 kΩ or higher |
OK |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Precaution
PRECAUTION
1. IGNITION SWITCH EXPRESSION
HINT:
The type of ignition switch used on this model differs according to the specifications
of the vehicle. The expressions listed in the table below are used in this section.
Expression
Ign ...
Adjustment
ADJUSTMENT
CAUTION / NOTICE / HINT
HINT:
Centering bolts are used to mount the door hinge to the vehicle body
and door. The door cannot be adjusted with the centering bolts installed
on it. Substitute the centering bolts with standard bolt ...