Toyota 4Runner manuals

Toyota 4Runner: ECM Communication Stop Mode

DESCRIPTION

Detection Item

Symptom

Trouble Area

ECM Communication Stop Mode

Either condition is met:

  • "ECM (Engine)" is not displayed on the "CAN Bus Check" screen.
  • "ECM Communication Stop Mode" in "DTC Combination Table" applies.
  • Power source or inside ECM
  • ECM

WIRING DIAGRAM


CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (ECM - BATTERY AND BODY GROUND)

(a) Disconnect the B38, B39 and F51 ECM connectors.

Text in Illustration

*a

Front view of wire harness connector

(to ECM)

-

-

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

B38-12 (E1) - Body ground

Always

Below 1 Ω

B39-10 (ME01) - Body ground

Always

Below 1 Ω

B39-14 (E01) - Body ground

Always

Below 1 Ω

B39-15 (E02) - Body ground

Always

Below 1 Ω

F51-12 (EC) - Body ground

Always

Below 1 Ω

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

F51-24 (BATT) - Body ground

Always

11 to 14 V

F51-23 (+B2) - Body ground

Battery positive (+) voltage applied to terminal F51-9 (MREL)

11 to 14 V

F51-22 (+B) - Body ground

Battery positive (+) voltage applied to terminal F51-9 (MREL)

11 to 14 V


OK

REPLACE ECM


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

Yaw Rate Sensor Communication Stop Mode
DESCRIPTION Detection Item Symptom Trouble Area Yaw Rate Sensor Communication Stop Mode Either condition is met: "Yaw R ...

Main Body ECU Communication Stop Mode
DESCRIPTION Detection Item Symptom Trouble Area Main Body ECU Communication Stop Mode Either condition is met: "Main Bo ...

Other materials about Toyota 4Runner:

Inspection
INSPECTION PROCEDURE 1. INSPECT REAR AXLE SHAFT (a) Using a dial indicator, measure the rear axle shaft runout and flange runout. Maximum runout: Shaft runout: 1.50 mm (0.0591 in.) Flange runout: 0.05 mm (0.00197 in.) If the rear axle shaft or flange ...

Tire Pressure Warning Receiver(w/ Antenna)
Components COMPONENTS ILLUSTRATION Removal REMOVAL PROCEDURE 1. REMOVE ROOF HEADLINING ASSEMBLY (a) Remove the roof headlining assembly (See page ). 2. REMOVE TIRE PRESSURE WARNING ANTENNA AND RECEIVER (a) Disconnect the connector. ...

© 2016-2020 | www.to4runner.net

0.0059