Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSNISSAN-DATSUN2024FRONTIER SL, RWDREPAIR AND DIAGNOSIS (SINGLE PAGE)BRAKESBRAKES CONTROL SYSTEMSBRAKE CONTROL SYSTEM (VDC/TCS/ABS) (DTC/CIRCUIT DIAGNOSIS)DTC/CIRCUIT DIAGNOSISPOWER SUPPLY AND GROUND CIRCUITDIAGNOSIS PROCEDURE

2024 Nissan-Datsun Frontier SL, RWD

Diagnosis Procedure

2024 Nissan-Datsun Frontier SL, RWDSECTION Diagnosis Procedure

CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) IGNITION POWER SUPPLY

Ignition switch OFF.
Disconnect ABS actuator and electric unit (control unit) harness connector.

Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.

(+)		(-)	Voltage (Approx.)
ABS actuator and electric unit (control unit)
Connector	Terminal
E127	18	Ground	0 V

Ignition switch ON.
NOTE: Start the engine.

Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.

(+)		(-)	Voltage (Approx.)
ABS actuator and electric unit (control unit)
Connector	Terminal
E127	18	Ground	Battery voltage

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 2.

CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) IGNITION POWER SUPPLY CIRCUIT

Ignition switch OFF.
Check the 10 A fuse (No. 43).
Disconnect IPDM E/R harness connector.

Check the continuity between ABS actuator and electric unit (control unit) harness connector and IPDM E/R.

ABS actuator and electric unit (control unit)		IPDM E/R		Continuity
Connector	Terminal	Connector	Terminal	Continuity
E127	18	E119	15	Yes

Check the continuity between ABS actuator and electric unit (control unit) harness connector and ground.

ABS actuator and electric unit (control unit)		-	Continuity
Connector	Terminal	-	Continuity
E127	18	Ground	No

Is the inspection result normal?

YES>>

Perform trouble diagnosis for ignition power supply.

NO>>

Repair / replace harness, connector, or fuse.

CHECK MOTOR AND MOTOR RELAY POWER SUPPLY

Ignition switch OFF.

Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.

(+)		(-)	Voltage (Approx.)
ABS actuator and electric unit (control unit)
Connector	Terminal
E127	4	Ground	Battery voltage
E125	47	Ground	Battery voltage

Ignition switch ON.
NOTE: Start the engine.

Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.

(+)		(-)	Voltage (Approx.)
ABS actuator and electric unit (control unit)
Connector	Terminal
E127	4	Ground	Battery voltage
E125	47	Ground	Battery voltage

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

GO TO 4.

CHECK MOTOR AND MOTOR RELAY POWER SUPPLY CIRCUIT
1. 1. Ignition switch OFF.
  2. Check the 30 A fusible link (No. P).
  3. Check the continuity and short circuit between ABS actuator and electric unit (control unit) harness connector terminals 4 and 47 and 30 A fusible link (No. P).
Is the inspection result normal?

YES>>

Perform trouble diagnosis for battery power supply.

NO>>

Repair / replace harness, connector, or fusible link.

CHECK ACTUATOR RELAY, ABS IN VALVE, ABS OUT VALVE POWER SUPPLY

Ignition switch OFF.

Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.

(+)		(-)	Voltage (Approx.)
ABS actuator and electric unit (control unit)
Connector	Terminal
E127	1	Ground	Battery voltage

Ignition switch ON.
NOTE: Start the engine.

Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.

(+)		(-)	Voltage (Approx.)
ABS actuator and electric unit (control unit)
Connector	Terminal
E127	1	Ground	Battery voltage

Is the inspection result normal?

YES>>

GO TO 7.

NO>>

GO TO 6.

CHECK ACTUATOR RELAY, ABS IN VALVE, ABS OUT VALVE POWER SUPPLY CIRCUIT
1. 1. Ignition switch OFF.
  2. Check the 40 A fusible link (No. R).
  3. Check the continuity and short circuit between ABS actuator and electric unit (control unit) harness connector terminal 1 and 40 A fusible link (No. R).
Is the inspection result normal?

YES>>

Perform trouble diagnosis for battery power supply.

NO>>

Repair / replace harness, connector, or fusible link.

CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) GROUND CIRCUIT

Check the continuity between ABS actuator and electric unit (control unit) harness connector and the ground.

ABS actuator and electric unit (control unit)		-	Continuity
Connector	Terminal	-	Continuity
E127	2	Ground	Yes
E127	3
E125	48

Is the inspection result normal?

YES>>

GO TO 8.

NO>>

Repair / replace harness, connector, or terminal.

CHECK TERMINAL
1. 1. Check the ABS actuator and electric unit (control unit) pin terminals for damage or loose connection with harness connector.
  2. Check the IPDM E/R pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?

YES>>

Replace the ABS actuator and electric unit (control unit). Refer to Removal and Installation .

NO>>

Repair / replace harness, connector, or terminal.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.