How To Fix Code C1241 Toyota

Diagnostic trouble lawmaking C1241 Land Cruiser

DESCRIPTION

WIRING DIAGRAM

INSPECTION Procedure

Audit BATTERY

Audit ECU-IG NO. 2 FUSE

READ VALUE USING INTELLIGENT TESTER (IG1 VOLTAGE VALUE)

RECONFIRM DTC

Audit Sideslip Control ECU (IG1 Concluding)

INSPECT SKID Command ECU (GND Final)

RECONFIRM DTC

DTC C1241/41 Low Bombardment Positive Voltage

Description

If the voltage supplied to the IG1 final is within the DTC detection range due to malfunctions in components such equally the battery and alternator circuit, this DTC is stored.

DTC Code	DTC Detection Status	Problem Area
C1241/41	When either of the following conditions is detected: ane. Both of the following conditions continue for at least 10 seconds. The vehicle speed is more 3 km/h (2 mph). The IG1 terminal voltage is below 9.5 V. ii. All of the following conditions continue for at least 0.two seconds. The solenoid relay remains on. The IG1 terminal voltage is below ix.5 Five. The relay contact is open up.	Bombardment ECU-IG No. two fuse Charging arrangement Harness or connector Master cylinder solenoid (Slip control ECU)

Wiring diagram

Inspection procedure

Detect:

When replacing the master cylinder solenoid, perform zero indicate calibration .

1. Check the battery voltage.

   Standard voltage:

   eleven to 14 Five

   Result

   Result		Go along to
   OK		A
   NG	1GR-Fe	B
   	2UZ-FE	C
   	1VD-FTV	D

	GO TO CHARGING SYSTEM (ON-VEHICLE INSPECTION)
	GO TO CHARGING SYSTEM (ON-VEHICLE INSPECTION)
	Go TO CHARGING SYSTEM (ON-VEHICLE INSPECTION)

2.Audit ECU-IG NO. 2 FUSE

1. Remove the ECU-IG No. 2 fuse from the main body ECU (cowl side junction block LH).

2. Measure the resistance according to the value(south) in the tabular array below.

   Standard Resistance:

   Tester Connexion	Condition	Specified Condition
   ECU-IG No. two fuse	Ever	Below 1 ?

	REPLACE ECU-IG NO. 2 FUSE

3.READ VALUE USING INTELLIGENT TESTER (IG1 VOLTAGE VALUE)

1. Install the ECU-IG No. 2 fuse.

2. Connect the intelligent tester to the DLC3.

3. Turn the ignition switch to ON and turn the intelligent tester on.

4. Outset the engine.

5. Enter the following menus: Chassis / ABS/VSC/TRC / Data List.

   ABS/VSC/TRC

   Tester Display	Measurement Particular/Range	Normal Condition	Diagnostic Note
   IG1 Voltage Value	IG1 voltage value/min.: 0 V, max.: 255 Five	nine.5 to 14.0 V	-

6. Measure the voltage output from the skid control ECU displayed on the intelligent tester.

   OK:

   The output voltage displayed on the intelligent tester is within 9.5 to xiv.0 V.

1. Clear the DTCs .

2. Check if the aforementioned DTCs are output .

   HINT:

   Reinstall the sensors, connectors, etc. and restore the previous vehicle atmospheric condition before rechecking for DTCs.

   Event

   Outcome		Proceed to
   DTC is output	LHD	A
   	RHD	B
   DTC is not output (When troubleshooting in accordance with the Diagnostic Trouble Code Chart)		C
   DTC is non output (When troubleshooting in accordance with the Trouble Symptoms Table)		D

	Supercede Principal CYLINDER SOLENOID
	USE SIMULATION METHOD TO CHECK
	Keep TO NEXT Excursion INSPECTION SHOWN IN Problem SYMPTOMS TABLE

A
Replace Master CYLINDER SOLENOID

5.Audit Sideslip CONTROL ECU (IG1 TERMINAL)

1. Disconnect the A24 skid control ECU connector.

2. Measure the voltage according to the value(southward) in the table beneath.

   Standard Voltage:

   Tester Connexion	Switch Status	Specified Condition
   A24-46 (IG1) - Torso footing	Ignition switch ON	11 to 14 V

	REPAIR OR REPLACE HARNESS OR CONNECTOR

vi.INSPECT SKID Command ECU (GND Concluding)

1. Disconnect the A24 and A25 skid control ECU connectors.

2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance:

   Tester Connection	Condition	Specified Status
   A24-1 (GND1) - Trunk ground	Always	Below 1 ?
   A24-32 (GND2) - Body ground	Always	Beneath 1 ?
   A25-iv (GND3) - Body ground	Ever	Below i ?

	REPAIR OR REPLACE HARNESS OR CONNECTOR

1. Clear the DTCs .

2. Check if the same DTCs are output .

   HINT:

   Reinstall the sensors, connectors, etc. and restore the previous vehicle conditions earlier rechecking for DTCs.

   Result

   Result		Go on to
   DTC is output	LHD	A
   	RHD	B
   DTC is not output (When troubleshooting in accordance with the Diagnostic Trouble Lawmaking Chart)		C
   DTC is not output (When troubleshooting in accordance with the Trouble Symptoms Table)		D

	Supervene upon MASTER CYLINDER SOLENOID
	Use SIMULATION METHOD TO CHECK
	PROCEED TO Side by side Circuit INSPECTION SHOWN IN Problem SYMPTOMS TABLE

A
Supersede MASTER CYLINDER SOLENOID

Source: https://auto-master.su/en/toyota/land-cruiser/abc/c1241

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