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:

Transmission Range Sensor Circuit Malfunction (PRNDL Input) (P0705)
DESCRIPTION The Park/Neutral Position (PNP) switch detects the shift lever position and sends signals to the ECM. DTC Code DTC Detection Condition Trouble Area P0705 One of the following conditio ...

Removal
REMOVAL PROCEDURE 1. TABLE OF BOLT, SCREW AND NUT HINT: All bolts, screws and nuts relevant to installing and removing the instrument panel are shown along with their alphabet code in the table below. 2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL ...

© 2016-2022 | www.to4runner.net

0.1443