ELECTRICAL SUPPLY UNIT (ESU) INSPECTION
ELECTRICAL SUPPLY UNIT (ESU) INSPECTION
SM2336728
id094000003700
1.Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(US)].)
2.Remove the Electrical supply unit (ESU) (See ELECTRICAL SUPPLY UNIT (ESU) REMOVAL/INSTALLATION.)
3.Connect the Electrical supply unit (ESU) connector.
4.Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(US)].)
5.Verify that the voltages of each of the terminals are as indicated in the terminal voltage table (reference). (See Terminal Voltage Table (Reference).)
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• If the voltage is not as specified in the terminal voltage table (reference), inspect the parts under Inspection item(s) and related wiring harnesses.
-
― If the system does not work normally even though the inspection items are normal, identify the malfunctioning location according to the directions in [DIAGNOSTIC SYSTEM] and [SYMPTOM TROUBLESHOOTING] then perform repairs.
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am3zzw00024799
|
Terminal Voltage Table (Reference)
|
Terminal |
Signal |
Connected to |
Measurement condition |
Voltage (V) |
Inspection item(s) |
|
|---|---|---|---|---|---|---|
|
1A
|
—
|
—
|
—
|
—
|
—
|
|
|
1B
|
—
|
—
|
—
|
—
|
—
|
|
|
1C
|
—
|
—
|
—
|
—
|
—
|
|
|
1D
|
—
|
—
|
—
|
—
|
—
|
|
|
1E
|
GND_COUPLING_TEMP_SEN
|
AWD solenoid
|
Under any condition
|
1.0 or less
|
• AWD solenoid
• Related wiring harness
|
|
|
1F
|
GND_FUEL_SEN
|
• Fuel gauge sender unit
• Fuel gauge sender unit (SUB) *1
|
Under any condition
|
1.0 or less
|
• Fuel gauge sender unit
• Fuel gauge sender unit (SUB) *1
• Related wiring harness
|
|
|
1G
|
COUPLING_TEMP_SEN
|
AWD solenoid
|
Compared with temperature detected by coupling temp sensor
|
Refer to graph1 (See Graph 1.)
|
• AWD solenoid
• Related wiring harness
|
|
|
1H *1
|
FUEL_SEN_SUB
|
Fuel gauge sender unit(SUB)*3
|
Inspect the fuel gauge sender unit and related wiring harnesses because the terminal voltage at this terminal cannot be examined.
|
—
|
||
|
1I
|
GND_OIL_TEMP_SEN
|
Differential oil temperature sensor
|
Under any condition
|
1.0 or less
|
• AWD solenoid
• Related wiring harness
|
|
|
1J
|
FUEL_SEN_MAIN
|
Fuel gauge sender unit
|
Inspect the fuel gauge sender unit and related wiring harnesses because the terminal voltage at this terminal cannot be examined.
|
—
|
||
|
1K
|
OIL_TEMP_SEN
|
Differential oil temperature sensor
|
Compared with temperature detected by differential oil temperature sensor
|
Refer to graph2 (See Graph 2.)
|
• Differential oil temperature sensor
• Related wiring harness
|
|
|
1L
|
—
|
—
|
—
|
—
|
—
|
|
|
1M
|
R_SEAT_BELT_SW_R
|
Rear buckle switch (RH) /Rear center buckle switch
|
Under any condition
|
B+
|
• Rear buckle switch (RH) /Rear center buckle switch
• Related wiring harness
|
|
|
1N
|
—
|
—
|
—
|
—
|
—
|
|
|
1O
|
R_SEAT_BELT_SW_C
|
Rear buckle switch (RH) /Rear center buckle switch
|
Under any condition
|
B+
|
• Rear buckle switch (RH) /Rear center buckle switch
• Related wiring harness
|
|
|
1P
|
—
|
—
|
—
|
—
|
—
|
|
|
1Q
|
R_SEAT_BELT_SW_L
|
Rear buckle switch (LH)
|
Under any condition
|
B+
|
• Rear buckle switch (LH)
• Related wiring harness
|
|
|
1R
|
—
|
—
|
—
|
—
|
—
|
|
|
1S
|
AUTO_HOLD_IND
|
Electric parking brake switch
|
Indicator light off
|
1.0 V or less
|
• Electric parking brake switch
• Related wiring harness
|
|
|
Indicator light on
|
B+
|
|||||
|
1T
|
—
|
—
|
—
|
—
|
—
|
|
|
1U
|
AUTO_HOLD_SW
|
Electric parking brake switch
|
AUTO HOLD switch is in neutral position
|
4.50 V
|
• Electric parking brake switch
• Related wiring harness
|
|
|
AUTO HOLD switch is pushed down
|
1.0 V or less
|
|||||
|
1V
|
—
|
—
|
—
|
—
|
—
|
|
|
1W
|
CAN_L_P_ADAS
|
CAN system related module
|
Terminal used for communication therefore determination based on terminal voltage is not possible.
|
|||
|
1X
|
CAN_H_P_ADAS
|
CAN system related module
|
Terminal used for communication therefore determination based on terminal voltage is not possible.
|
|||
|
2A
|
—
|
—
|
—
|
—
|
—
|
|
|
2B
|
4WD_SOL_N
|
AWD solenoid
|
Ignition switched ON (engine off)
|
B+
|
• AWD solenoid
• Related wiring harness
|
|
|
Ignition switched OFF
|
1.0 or less
|
|||||
|
2C
|
4WD_SOL_P
|
AWD solenoid
|
Ignition switched ON (engine off)
|
B+
|
• AWD solenoid
• Related wiring harness
|
|
|
Ignition switched OFF
|
1.0 or less
|
|||||
|
2D
|
BURGLAR HORN
|
Theft-deterrent horn
|
Ignition is switched ON (engine off or on)
|
horn sounds
|
B+
|
• Theft-deterrent horn
• Related wiring harness
|
|
horn does not sounds
|
1.0 or less
|
|||||
|
2E
|
LIN
|
Body control module (BCM)
|
Terminal used for communication therefore determination based on terminal voltage is not possible.
|
|||
|
3A
|
CAN_H_1
|
CAN system related module
|
Terminal used for communication therefore determination based on terminal voltage is not possible.
|
|||
|
3B
|
HMSL
|
High-mount brake light
|
Brake pedal depressed
|
B+
|
• High-mount brake light
• Related wiring harness
|
|
|
Brake pedal not depressed
|
1.0 or less
|
|||||
|
3C
|
CAN_L_1
|
CAN system related module
|
Terminal used for communication therefore determination based on terminal voltage is not possible.
|
|||
|
3D *2
|
R_WIP_AS_SW
|
Rear wiper motor
|
Rear wiper switch at ON
|
1.0 or less
|
• Rear wiper motor
• Related wiring harness
|
|
|
Rear wiper switch at OFF
|
B+
|
|||||
|
3E
|
—
|
—
|
—
|
—
|
—
|
|
|
3F
|
—
|
—
|
—
|
—
|
—
|
|
|
3G
|
—
|
—
|
—
|
—
|
—
|
|
|
3H
|
CARGO_SW
|
• Trunk lid latch and lock actuator(4SD)
• Liftgate latch and lock actuator(5HB)
|
• Trunk lid latch switch is on (4SD)
• Liftgate latch switch is on (5HB)
|
B+
|
• Trunk lid latch and lock actuator(4SD)
• Liftgate latch and lock actuator(5HB)
• Related wiring harness
|
|
|
• Trunk lid latch switch is off (4SD)
• Liftgate latch switch is off (5HB)
|
1.0 or less
|
|||||
|
3I
|
—
|
—
|
—
|
—
|
—
|
|
|
3J
|
—
|
—
|
—
|
—
|
—
|
|
|
3K
|
—
|
—
|
—
|
—
|
—
|
|
|
3L
|
STOP_SIG
|
• Electronically controlled brake unit
• DSC HU/CM
|
Brake pedal depressed
|
B+
|
• Electronically controlled brake unit
• DSC HU/CM
• Related wiring harness
|
|
|
Brake pedal not depressed
|
1.0 or less
|
|||||
|
3M
|
—
|
—
|
—
|
—
|
—
|
|
|
3N
|
—
|
—
|
—
|
—
|
—
|
|
|
3O
|
—
|
—
|
—
|
—
|
—
|
|
|
3P
|
—
|
—
|
—
|
—
|
—
|
|
|
4A
|
GND2
|
Body ground
|
Under any condition
|
1.0 or less
|
Related wiring harness
|
|
|
4B
|
R_TURN_LAMP_RH
|
Rear combination light (RH)
|
Ignition switched ON (engine off)
|
Turn switch at right turn light position
|
Repeatedly switches between 1.0 or less and B+
|
• Rear combination light (RH)
• Related wiring harness
|
|
Turn switch is in position other than above
|
1.0 or less
|
|||||
|
4C
|
FUEL_LID_UL
|
Fuel-filler lid lock actuator
|
Fuel filler lid actuator unlatch
|
B+
|
• Fuel-filler lid lock actuator
• Related wiring harness
|
|
|
Except above.
|
1.0 or less
|
|||||
|
4D
|
R_TURN_LAMP_LH
|
Rear combination light (LH)
|
Ignition switched ON (engine off)
|
Turn switch at left turn light position
|
Repeatedly switches between 1.0 or less and B+
|
• Rear combination light (LH)
• Related wiring harness
|
|
Turn switch is in position other than above
|
1.0 or less
|
|||||
|
4E
|
FUEL_LID_L
|
Fuel-filler lid lock actuator
|
Fuel filler lid actuator latch
|
V B
|
• Fuel-filler lid lock actuator
• Related wiring harness
|
|
|
Except above.
|
1.0 or less
|
|||||
|
4F
|
BATT5_R_TURN
|
• F19 10A fuse
• F28 25A fuse
• MAIN 200A fuse
|
Under any condition
|
B+
|
• F19 10A fuse
• F28 25A fuse
• MAIN 200A fuse
• Related wiring harness
|
|
|
4G
|
E_LATCH_MOTOR
|
• Trunk lid latch and lock actuator(4SD)
• Liftgate latch and lock actuator(5HB)
|
Press liftgate opener switch
|
Repeatedly switches between 1.0 or less and B+
|
• Trunk lid latch and lock actuator(4SD)
• Liftgate latch and lock actuator(5HB)
• Related wiring harness
|
|
|
Except above.
|
1.0 or less.
|
|||||
|
4H
|
+B7_C_BCM
|
• F22 15A fuse
• MAIN 200A fuse
|
Under any condition
|
B+
|
• F22 15A fuse
• MAIN 200A fuse
• Related wiring harness
|
|
|
4I
|
+B3_R_WIPER
|
• F15 15A fuse
• F28 25A fuse
• MAIN 200A fuse
|
Under any condition
|
B+
|
• F15 15A fuse
• F28 25A fuse
• MAIN 200A fuse
• Related wiring harness
|
|
|
4J *2
|
R_WIP_MTR
|
Rear wiper motor
|
Ignition switched ON (engine off)
|
B+
|
• Rear wiper motor
• Related wiring harness
|
|
|
Ignition switched OFF
|
1.0 or less
|
|||||
|
5A
|
+B6_STOP
|
• F17 10A fuse
• F28 25A fuse
• MAIN 200A fuse
|
Under any condition
|
B+
|
• F17 10A fuse
• F28 25A fuse
• MAIN 200A fuse
• Related wiring harness
|
|
|
5B
|
STOP_LAMP
|
Rear combination light (LH)/(RH)
|
Brake pedal depressed
|
B+
|
• Rear combination light (LH)/(RH)
• Related wiring harness
|
|
|
Brake pedal not depressed
|
1.0 or less
|
|||||
|
5C
|
+B2_R_ESU2
|
• F21 10A fuse
• F28 25A fuse
• MAIN 200A fuse
|
Under any condition
|
B+
|
• F21 10A fuse
• F28 25A fuse
• MAIN 200A fuse
• Related wiring harness
|
|
|
5D
|
STOP_LAMP_SW
|
• Brake switch (No.1 SIGNAL)
• Body control module (BCM)
|
Brake switch is on
|
B+
|
• Brake switch (No.1 SIGNAL)
• Body control module (BCM)
• Related wiring harness
|
|
|
Brake switch is off
|
1.0 or less
|
|||||
|
5E
|
TAIL_LID_AND_LICENCE_LAMP
|
• Trunk lid light (LH)/(RH) (4SD)
• Liftgate light (LH)/(RH)(5HB)
• License plate light (LH)/(RH)
|
Light switch at TNS position
|
B+
|
• Trunk lid light (LH)/(RH) (4SD)
• Liftgate light (LH)/(RH)(5HB)
• License plate light (LH)/(RH)
• Related wiring harness
|
|
|
Light switch at OFF position
|
1.0 or less
|
|||||
|
5F
|
—
|
—
|
—
|
—
|
—
|
|
|
5G *3
|
BACKUP_BATT_MONITOR
|
Backup power supply
|
Under any condition
|
B+
|
• Backup power supply
• Related wiring harness
|
|
|
5H
|
—
|
—
|
—
|
—
|
—
|
|
|
5I
|
CARGO_LAMP
|
• Trunk compartment light(4SD)
• Liftgate_lock_switch(5HB)
• Cargo compartment light(5HB)
|
Under any condition
|
B+
|
• Trunk compartment light(4SD)
• Liftgate_lock_switch(5HB)
• Cargo compartment light(5HB)
• Related wiring harness
|
|
|
5J
|
DOOR_SW_FL
|
Door electrical supply unit (driver’s side)
|
Under any condition
|
B+
|
• Door electrical supply unit (driver’s side)
• Related wiring harness
|
|
|
5K
|
IG1
|
• F49 15A fuse
• IG1 RELAY No.2
|
Under any condition
|
B+
|
• F49 15A fuse
• IG1 RELAY No.2
• Related wiring harness
|
|
|
5L
|
DOOR_SW_RL
|
Rear door latch and lock actuator (LH)
|
Rear door (LH) open
|
1.0 or less
|
• Rear door latch switch
• Related wiring harness
|
|
|
Rear door (LH) closed
|
B+
|
|||||
|
5M
|
—
|
—
|
—
|
—
|
—
|
|
|
5N
|
—
|
—
|
—
|
—
|
—
|
|
|
5O
|
REVERSE_LAMP
|
• Trunk lid light (LH)/(RH)(4SD)
• Liftgate light (LH)/(RH) (5HB)
|
Ignition switched ON (engine off)
|
Selector lever at R position
|
B+
|
• Trunk lid light (LH)/(RH)(4SD)
• Liftgate light (LH)/(RH)(5HB)
• Related wiring harness
|
|
Other
|
1.0 or less
|
|||||
|
5P
|
+B1_R_ESU1
|
• F20 10A fuse
• F28 25A fuse
• MAIN 200A fuse
|
Under any condition
|
B+
|
• F20 10A fuse
• F28 25A fuse
• MAIN 200A fuse
• Related wiring harness
|
|
|
5Q
|
+B4_R_FOG
|
• F18 10A fuse
• F28 25A fuse
• MAIN 200A fuse
|
Under any condition
|
B+
|
• F18 10A fuse
• F28 25A fuse
• MAIN 200A fuse
• Related wiring harness
|
|
|
5R
|
TAIL_R_COMBI_LAMP
|
Rear combination light (LH)/(RH)
|
Light switch at TNS position
|
B+
|
• Rear combination light (LH)/(RH)
• Related wiring harness
|
|
|
Light switch at OFF position
|
1.0 or less
|
|||||
|
5S
|
R_FOG_LAMP
|
• Trunk lid light (LH)/(RH)(4SD)
• Liftgate light (LH)/(RH) (5HB)
|
Light switch at TNS position
|
Rear fog light at OFF
|
1.0 or less
|
• Trunk lid light (LH)/(RH)(4SD)
• Liftgate light (LH)/(RH) (5HB)
• Related wiring harness
|
|
Rear fog light at ON
|
B+
|
|||||
|
5T
|
GND1
|
Body ground
|
Under any condition
|
1.0 or less
|
Related wiring harness
|
|
*1:AWD
*2:5HB
*3:with backup power supply
Graph 1
am3zzw00027492
|
Graph 2
am3zzw00034623
|
