Toyota Sienna Service Manual: Skid Control ECU Communication Stop Mode

Toyota Sienna Service Manual / Can communication / Can communication system / Fail-safe chart / Skid Control ECU Communication Stop Mode

DESCRIPTION

Detection Item	Symptom	Trouble Area
Skid Control ECU Communication Stop Mode	"ABS/VSC/TRC" is not displayed on the "Communication Bus Check" screen of the intelligent tester Applies to "Skid Control ECU Communication Stop Mode" in the "DTC COMBINATION TABLE"	Power source circuit of skid control ECU Skid control ECU branch wire or connector Skid control ECU with Actuator

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 (SKID CONTROL ECU BRANCH WIRE)

CHECK OPEN IN CAN BUS WIRE (SKID CONTROL ECU BRANCH WIRE)

Turn the ignition switch off.
Disconnect the skid control ECU with Actuator connector.
Measure the resistance according to the value(s) in the table below.

Standard resistance

Standard resistance

2 CHECK WIRE HARNESS (IG1, GND1, GND2)

CHECK WIRE HARNESS (IG1, GND1, GND2)

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

Standard resistance

Standard resistance

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

Standard voltage

REPLACE ABS & TRACTION ACTUATOR ASSEMBLY

Fail-safe chart

1. FAIL-SAFE FUNCTION When communication fails in any of the main wires (communication lines) due to a short circuit or other causes, the fail-safe function, which is specified for each syst ...

Distance Control ECU Communication Stop Mode

DESCRIPTION Detection Item Symptom Trouble Area Distance Control ECU Communication Stop Mode Distance control" is not displayed on the &qu ...

Other materials:

ECM / PCM Processor
DESCRIPTION The ECM continuously monitors its internal processors (CPUs), A/F sensor transistors and heated oxygen sensor (HO2S) transistors. This self-check ensures that the ECM is functioning properly. These are diagnosed by internal "mirroring" of the main and sub CPUs to det ...

Removal
1. PRECAUTION CAUTION: Be sure to read "PRECAUTION" thoroughly before servicing. 2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL CAUTION: Wait for 90 seconds after disconnecting the cable to prevent the airbag working. 3. REMOVE FRONT SEAT ASSEMBLY (for Manual Seat) 4. REMOVE ...

Inspection
1. Inspect heated oxygen sensor (for bank 1 sensor 2) (a) Measure the resistance of the sensor. Standard resistance If the resistance is not as specified, replace the sensor. 2. HEATED OXYGEN SENSOR (for Bank 2 Sensor 2) (a) Measure the resistance of the sensor. Standard resistance ...