Nissan Frontier D40. Manual — part 637
TRAILER TOW
EXL-21
< FUNCTION DIAGNOSIS >
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Component Parts Location
INFOID:0000000005561509
Component Description
INFOID:0000000005561510
1.
Stop lamp switch E38 (manual trans-
mission) or E39 (automatic transmis-
sion) (view with lower instrument panel
LH removed)
2.
Brake pedal
3.
BCM, M18, M19, M20 (view with lower
instrument panel LH removed)
4.
Trailer turn relay LH E164
5.
IPDM E/R E121, E122, E124
6.
Trailer turn relay RH E165
7.
Trailer tow relay 2 E228
8.
Trailer tow relay 1 E227
9.
Combination switch (lighting and turn
signal switch) M28
10. Combination meter M24
AWLIA1765GB
Part name
Description
BCM
• Receives lighting and turn signal requests from combination
switch (lighting and turn signal switch).
• Receives stop lamp signal requests from combination meter via
CAN communication.
• Sends lighting signal request to the IPDM E/R to control the tail
lamp relay via CAN communication.
• Sends turn/hazard/brake control signal to the trailer turn relays.
IPDM E/R
Activates the tail lamp relay upon request from the BCM via CAN
communication.
Combination meter
• Receives stop lamp switch signal from stop lamp switch.
• Sends stop lamp signal request to the BCM via CAN communi-
cation.
Combination switch (lighting and turn signal switch)
Outputs lighting and turn signal requests to the BCM.
EXL-22
< FUNCTION DIAGNOSIS >
COMBINATION SWITCH READING SYSTEM
COMBINATION SWITCH READING SYSTEM
System Diagram
INFOID:0000000005561511
System Description
INFOID:0000000005561512
OUTLINE
• BCM reads the status of the combination switch (light, turn signal, wiper and washer) and recognizes the
status of each switch.
• BCM is a combination of 5 output terminals (OUTPUT 1 - 5) and 5 input terminals (INPUT 1 - 5). It reads a
maximum of 20 switch status.
COMBINATION SWITCH MATRIX
LIIA1323E
COMBINATION SWITCH READING SYSTEM
EXL-23
< FUNCTION DIAGNOSIS >
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Combination switch circuit
Combination switch INPUT-OUTPUT system list
NOTE:
Headlamp has a dual system switch.
COMBINATION SWITCH READING FUNCTION
Description
• BCM reads the status of the combination switch at 10ms interval normally.
NOTE:
BCM reads the status of the combination switch at 20ms interval when BCM is controlled at low power con-
sumption control mode.
• BCM operates as follows and judges the status of the combination switch.
- INPUT 1 - 5 outputs the voltage waveforms of 5 systems simultaneously.
- It operates the transistor on OUTPUT side in the following order: OUTPUT 5
→
4
→
3
→
2
→
1.
System
OUTPUT 1
OUTPUT 2
OUTPUT 3
OUTPUT 4
OUTPUT 5
INPUT 1
—
FR WASHER
FR WIPER LOW
TURN LH
TURN RH
INPUT 2
FR WIPER HI
—
FR WIPER INT
PASSING
HEADLAMP 1
INPUT 3
INT VOLUME 1
—
—
HEADLAMP 2
HI BEAM
INPUT 4
—
INT VOLUME 3
AUTO LIGHT
—
TAIL LAMP
INPUT 5
INT VOLUME 2
—
—
FR FOG
—
LIIA1325E
JPMIA0067GB
EXL-24
< FUNCTION DIAGNOSIS >
COMBINATION SWITCH READING SYSTEM
- The voltage waveform of INPUT corresponding to the formed circuit changes according to the operation of
the transistor on OUTPUT side if any (1 or more) switches are ON.
- It reads this change of the voltage as the status signal of the combination switch.
Operation Example
In the following operation example, the combination of the status signals of the combination switch is replaced
as follows: INPUT 1 - 5 to “1 - 5” and OUTPUT 1 - 5 to “A - E”.
Example 1: When a switch (TURN RH switch) is turned ON
• The circuit between INPUT 1 and OUTPUT 5 is formed when the TURN RH switch is turned ON.
• BCM detects the combination switch status signal “1E” when the signal of OUTPUT 5 is input to INPUT 1.
• BCM judges that the TURN RH switch is ON when the signal “1E” is detected.
Example 2: When some switches (turn RH switch, front wiper LO switch) are turned ON
JPMIA0068GB
JPMIA0073GB
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