Toyota RAV4 manuals

Toyota Sienna Service Manual: ECM Communication Stop Mode

DESCRIPTION

Detection Item

Symptom

Trouble Area

ECM Communication Stop Mode
  • "Engine" is not displayed on the "Communication Bus Check" screen of the intelligent tester
  • Applies to "ECM Communication Stop Mode" in the "DTC COMBINATION TABLE"
  • Power source circuit of ECM
  • CAN main wire or connector
  • ECM

WIRING DIAGRAM

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

HINT: Operating the ignition switch, any switches, or any doors triggers related ECU and sensor communication with the CAN. This communication will cause the resistance value to change.

1 CHECK OPEN IN CAN BUS WIRE (ECU MAIN BUS WIRE)

CHECK OPEN IN CAN BUS WIRE (ECU MAIN BUS WIRE)

  1. Disconnect ECM connector (E5).
  2. Measure the resistance according to the value(s) in the table below.

Standard resistance

Standard resistance

2 CHECK WIRE HARNESS (E1, BATT, +BM, IGSW)

CHECK WIRE HARNESS (E1, BATT, +BM, IGSW)

  1. Disconnect the ECM connector (E11).
  2. Measure the resistance according to the value(s) in the table below.

Standard resistance

Standard resistance

  1. Disconnect the ECM connector (E4).

CHECK WIRE HARNESS (E1, BATT, +BM, IGSW)

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

Standard voltage

Standard voltage

REPLACE ECM

Yaw Rate Sensor Communication Stop Mode
DESCRIPTION Detection Item Symptom Trouble Area Yaw Rate Sensor Communication Stop Mode "Yaw rate/ Deceleration sensor" is not displayed ...

CAN Bus Line
DESCRIPTION When any DTC for the CAN communication system is output, first measure the resistance between the terminals of the DLC3 to specify the trouble area, and check that there is no short ...

Other materials:

Random / Multiple Cylinder Misfire Detected
DESCRIPTION When the engine misfires, high concentrations of hydrocarbons (HC) enter the exhaust gas. High HC concentration levels can cause increase in exhaust emission levels. Extremely high concentrations of HC can also cause increases in the Three-Way Catalytic Converter (TWC) tem ...

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 ...

DTC check / clear
1. CHECK DTC  Connect the intelligent tester to the Controller Area Network Vehicle Interface Module (CAN VIM). Then connect the CAN VIM to the DLC3.  Turn the ignition switch on.  Turn the tester ON.  Enter the following menu items: DIAGNOSIS / OBD/ MOBD / IM ...

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