Honda Ridgeline. Manual — part 424
05
06
−
−
−
−
−
−
YES
NO
YES
NO
YES
NO
21-132
Climate Control
A/C Pressure Switch Circuit Troubleshooting (cont’d)
UNDER-HOOD RELAY BOX CONNECTOR H (18P)
A/C PRESSURE SWITCH 4P CONNECTOR
BLU/RED
BLU/RED
A/C PRESSURE SWITCH 4P CONNECTOR
BLU/RED
JUMPER WIRE
18. Check for proper A/C system pressure.
Replace the A/C pressure switch.
Repair the A/C pressure problem.
19. Disconnect under-hood relay box connector H (18P).
20. Check for continuity between the A/C pressure
switch connector No. 4 terminal and under-hood
relay box connector H (18P) No. 3 terminal.
Go to step 21.
Repair open in the wire between the relay
control module and the A/C pressure switch.
21. Reconnect under-hood relay box connector H (18P).
22. Connect the A/C pressure switch connector No. 4
terminal to body ground with a jumper wire.
23. Start the engine.
Replace the relay control module.
Check for loose wires or poor connections. If
the connections are good, check the grounds. If the
grounds are good, replace the relay control
module.
Wire side of female terminals
Wire side of female terminals
Wire side of female terminals
Is the pr essur e within specif ications?
Is ther e continuity?
Do the A/ C compr essor and f ans come on?
*01
SJC8AH7G10500035301FEAT00
01
SJC8AH7G10500035301KBAT02
−
21-133
21-133
In-car Temperature Sensor Test
In-car Temperature Sensor
Replacement
IN-CAR TEMPERATURE SENSOR
14
10
32
0
50
10
68
20
86
30
104 °F
40 °C
TEMPERATURE
RESISTANCE
(k
)
12
11
10
9
8
7
6
5
4
3
2
1
A
B
1. Remove the in-car temperature sensor (see page
21-133).
2. Test the in-car temperature sensor while holding it
in front of the dashboard center vent.
• Measure the resistance with the system set to
Max Cool.
• Measure the resistance with the system set to
Max Hot.
3. Compare the resistance reading between the No. 1
and No. 2 terminals of the in-car temperature
sensor with the specifications shown in the graph;
the resistance should be within the specifications.
4. If the resistance is not as specified, replace the in-
car temperature sensor (see page 21-133).
1. Remove the driver’s dashboard lower cover
(see page 20-83).
2. Remove the self-tapping screws and the in-car
temperature sensor (A) from the driver’s
dashboard lower cover (B).
3. Install the sensor in the reverse order of removal.
Be sure to connect the air hose securely.
Terminal side of male terminals
+
−
−
−
01
SJC8AH7G10500057401FEAT00
01
SJC8AH7G10500057401KBAT02
21-134
21-134
Climate Control
Sunlight Sensor Test
Sunlight Sensor Replacement
ORN
RED/BLK
A
A
B
1. Remove the sunlight sensor (A) from the
dashboard.
2. Turn the ignition switch ON (II). Measure the
voltage between the terminals with the (
) probe
on the No. 1 terminal and the (
) probe on the
No. 2 terminal with the connector connected.
NOTE: The voltage readings will not change under
the light of a flashlight or a fluorescent lamp.
Voltage should be:
• 3.6
3.7 V or more with the sensor out of direct
sunlight.
• 3.3
3.5 V or less with the sensor in direct
sunlight.
3. If the voltage is not as specified, replace the
sunlight sensor (see page 21-134).
1. Remove the sunlight sensor (A) from the
dashboard, then disconnect the connector (B). Be
careful not to damage the sensor and the
dashboard.
2. Install the sensor in the reverse order of removal.
01
SJC8AH7G24100012701FEAT01
01
02
SJC8AH7G24100012701KBAT00
Max Cool:
About 0.5 V
Max Hot:
About 4.5 V
21-135
21-135
Driver’s Air Mix Control Motor Test
Driver’s Air Mix Control Motor
Replacement
DRIVER’S AIR MIX CONTROL MOTOR
A
A
B
NOTE: Before testing, check for HVAC DTCs (see page
21-8).
1. Disconnect the 7P connector from the driver’s air
mix control motor.
Incorrectly applying power and ground to
the driver’s air mix control motor will
damage it. Follow the instructions carefully.
2. Connect battery power to the No. 1 terminal of the
driver’s air mix control motor, and ground the No. 2
terminal; the driver’s air mix control motor should
run, and stop at Max Cool. If it doesn’t, reverse the
connections; the driver’s air mix control motor
should run, and stop at Max Hot. When the driver’s
air mix control motor stops running, disconnect
battery power immediately.
3. If the driver’s air mix control motor did not run in
step 2, remove it, then check the driver’s air mix
control linkage and door for smooth movement.
• If the linkage and door move smoothly, replace
the driver’s air mix control motor (see page
21-135).
• If the linkage or door sticks or binds, repair them
as needed.
• If the driver’s air mix control motor runs
smoothly, go to step 4.
4. Measure the resistance between the No. 5 and
No. 7 terminals. It should be between 4.2 to 7.8 k
.
5. Reconnect the driver’s air mix control motor 7P
connector, then turn the ignition switch ON (II).
6. Using the backprobe set, measure the voltage
between the No. 3 and No. 7 terminals.
7. If either the resistance or voltage readings are not
as specified, replace the driver’s air mix control
motor (see page 21-135).
1. Remove the driver’s dashboard lower cover
(see page 20-83).
2. Remove the self-tapping screws and the duct (A).
3. Disconnect the 7P connector (A) from the driver’s
air mix control motor (B). Remove the self-tapping
screws and the driver’s air mix control motor from
the heater unit.
4. Install the motor in the reverse order of removal.
Make sure the pin on the motor is properly
engaged with the linkage. After installation, make
sure the motor runs smoothly.
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