Toyota Sienna Quiz
Can communication

ECM Communication Stop Mode

In this manual: Can communication
Introduction — 55Service specifications — 7Maintenance — 7Engine — 264U151e automatic transaxle — 108Transfer — 19Propeller shaft — 8Drive shaft — 14Differential — 16Axle — 18Suspension — 37Tire and wheel — 54Brake control — 141Parking brake — 16Steering Column — 11Power steering — 18Air conditioning — 106Supplemental restraint system — 146Seat belt — 22Theft deterrent — 14Engine immobiliser — 17Cruise control — 65Lighting — 61Wiper and washer — 13Door lock — 42Meter — 28Audio / visual — 94Navigation — 108Park assist / monitoring — 33Horn — 5Garage door opener — 42GR-FE Engine control system — 126Supplemental restraint system — 147Other system — 14Windshield / windowglass — 43Mirror — 23Instrument panel — 6Seat belt — 22Seat — 92Engine hood / door — 104Exterior — 39Interior — 5Sliding roof — 9Multiplex communication — 18Can communication — 23
6steps
~36min
2/5difficulty
Done 0 of 6

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:

  • Turn the ignition switch off before measuring the resistances of CAN bus main wires and CAN bus branch wires.
  • After the ignition switch is turned off, check that the key reminder warning system and light reminder warning system are not in operation.
  • Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches, or the doors. If any doors need to be opened in order to check connectors, open the doors and leave them open.

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

Standard voltage

Standard voltage

REPLACE ECM

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