Toyota RAV4 manuals

Toyota Sienna Service Manual: Low Battery Positive Voltage

DTC C1241/41 Low Battery Positive Voltage

DESCRIPTION

If there is a problem with the brake actuator assembly (skid control ECU) power supply circuit, the skid control ECU outputs the DTC and prohibits the ABS operation with the fail safe function.

If the voltage supplied to the IG1 terminal is not within the DTC detection threshold due to malfunctions in such as the battery and alternator circuit, this DTC is stored.

Low Battery Positive Voltage

WIRING DIAGRAM

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT: After steps 1 and 2 are completed, start the inspection from step 3 when using the intelligent tester, and from step 4 when not using the intelligent tester.

1 INSPECT BATTERY

(a) Check the battery voltage.

Standard voltage: 11 to 14 V

2 INSPECT FUSE (ECU-IG FUSE)

INSPECT FUSE (ECU-IG FUSE)

(a) Remove the ECU-IG fuse from the driver side J/B.

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

Standard resistance

3 READ VALUE OF INTELLIGENT TESTER (IG1 POWER SUPPLY)

(a) Install the ECU-IG fuse.

(b) Connect the intelligent tester to the DLC3.

(c) Turn the ignition switch to the ON position and turn the intelligent tester main switch on.

(d) Start the engine.

(e) Select the DATA LIST mode on the intelligent tester.

ABS:

(f) Measure the voltage output from the ECU displayed on the intelligent tester.

OK: "Normal" is displayed.

4 INSPECT SKID CONTROL ECU (IG1 TERMINAL VOLTAGE)

INSPECT SKID CONTROL ECU (IG1 TERMINAL VOLTAGE)

(a) Disconnect the skid control ECU connector.

(b) Turn the ignition switch to ON position.

(c) Measure the voltage according to the value(s) in the table below.

Standard voltage

5 INSPECT SKID CONTROL ECU (GND TERMINAL CONTINUITY)

INSPECT SKID CONTROL ECU (GND TERMINAL CONTINUITY)

(a) Turn the ignition switch off.

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

Standard resistance

6 RECONFIRM DTC

(a) Clear the DTCs (See page BC-10).

(b) Check that the same DTC is recorded (See page BC- 10).

HINT: Reinstall the sensors, connectors, etc. and restore the vehicle to its prior condition before rechecking for DTCs.

Result

REPLACE BRAKE ACTUATOR ASSEMBLY

Open in ABS Solenoid Relay Circuit
DESCRIPTION This relay supplies power to each ABS solenoid. Immediately after the ignition switch is turned to the ON position, the relay turns on if the solenoid is determined to be normal ...

Open in Stop Light Switch Circuit
DTC C1249/49 Open in Stop Light Switch Circuit DESCRIPTION This skid control ECU inputs the stop light switch signal and detects the status of brake operation. The skid control ECU has an open ...

Other materials:

Transmission Fluid Temperature Sensor "A"
DESCRIPTION The ATF (Automatic Transmission Fluid) temperature sensor converts the fluid temperature into a resistance value which is input into the ECM. The ECM applies a voltage to the temperature sensor through ECM terminal THO1. The sensor resistance changes with the transmission f ...

Installation
1. Install air fuel ratio sensor (for bank 2 sensor 1) (a) Using SST, install the sensor to the exhaust manifold LH. SST 09224-00010 Torque: 40 N*m (408 kgf*cm, 30 ft.*lbf) for use with SST 44 N*m (449 kgf*cm, 32 ft.*lbf) for use without SST HINT: Use a torque wrench with a fulcrum ...

Security Horn Circuit
DESCRIPTION During the alarm sounding state, the relay in the ECU turns on and off in a cycle of approximately 0.2 seconds, causing the security horn to sound. WIRING DIAGRAM INSPECTION PROCEDURE 1 INSPECT SECURITY HORN ASSEMBLY Disconnect the T1 security horn connector.  C ...

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