Toyota Tundra Service Manual: System Voltage (P0560)

DESCRIPTION

This DTC is detected when the 4 wheel drive control ECU, which monitors the B terminal voltage, determines that the standard voltage is not met and detects a B terminal system malfunction.

DTC Code

DTC Detection Condition

  1. Diagnosis Condition
  2. Malfunction Status
  3. Malfunction Time
  4. Other

Trouble Area

P0560

  1. The ignition switch is ON and the transfer position switch is operated
  2. Open circuit or short to ground in the B terminal system (B terminal voltage is below 9.5 V)
  3. 1 second or more
  4. 1 trip detection logic
  • Battery
  • Charging system
  • Wire harness and connector
  • 4 wheel drive control ECU

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.
  • If only past DTCs are output, battery depletion may have occurred in the past.

PROCEDURE

1.

INSPECT BATTERY

(a) Inspect the battery (3UR-FE: See page , 3UR-FBE: See page , 1UR-FE: See page ).

NG

REPLACE BATTERY

OK

2.

CHECK BATTERY TERMINAL

(a) Check the battery terminals (3UR-FE: See page , 3UR-FBE: See page , 1UR-FE: See page ).

NG

REPAIR BATTERY TERMINAL OR REPLACE BATTERY

OK

3.

CHECK HARNESS AND CONNECTOR (B TERMINAL)

(a) Disconnect the 4 wheel drive control ECU connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

A25-6 (B) - Body ground

Always

11 to 14 V

Text in Illustration

*a

Front view of wire harness connector

(to 4 Wheel Drive Control ECU)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

CHECK HARNESS AND CONNECTOR (GND TERMINAL)

(a) Disconnect the 4 wheel drive control ECU connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A25-5 (GND) - Body ground

Always

Below 1 Ω

Text in Illustration

*a

Front view of wire harness connector

(to 4 Wheel Drive Control ECU)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5.

RECONFIRM DTC

(a) Clear the DTCs (See page ).

(b) Operate the transfer position switch.

(c) Check if the same DTC is output (See page ).

Result

Result

Proceed to

DTC is output

A

DTC is not output

B

A

REPLACE 4 WHEEL DRIVE CONTROL ECU

B

CHECK INTERMITTENT PROBLEMS

    Four Wheel Drive (4WD) Range Signal Circuit Range / Performance (P279E)

    Four Wheel Drive (4WD) Low Switch Circuit Range / Performance (P2772)

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