POWER ASSIST SYSTEMS: POWER STEERING SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING; 2016 MY Sienna [12/2015

Last Modified: 04-05-2023	6.11:8.1.0	Doc ID: RM100000000WPH3
Model Year Start: 2016	Model: Sienna	Prod Date Range: [12/2015 - 08/2016]
Title: POWER ASSIST SYSTEMS: POWER STEERING SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING; 2016 MY Sienna [12/2015 - 08/2016]

HOW TO PROCEED WITH TROUBLESHOOTING

CAUTION / NOTICE / HINT

HINT:

1.	VEHICLE BROUGHT TO WORKSHOP

2.	CUSTOMER PROBLEM ANALYSIS

(a) Confirm problem symptoms

See page

3.	INSPECT BATTERY VOLTAGE

Standard voltage:

11 to 14 V

If the voltage is below 11 V, recharge or replace the battery before proceeding.

4.	CHECK DTC AND FREEZE FRAME DATA*

HINT:

Refer to DTC Check / Clear.

See page

5.	PROBLEM SYMPTOM CONFIRMATION

6.	CHECK CAN COMMUNICATION SYSTEM*

(a) Refer to DTC output for the CAN communication system.

See page

Result	Proceed to
CAN system DTC is not output	A
CAN system DTC is output	B

HINT:

When any CAN communication system DTCs are output, perform troubleshooting on the CAN communication system first.
When communication to the power steering ECU is not established through the Techstream, inspect terminals CANH and CANL of the DLC3 and the power steering ECU, and the IG circuit of the power steering ECU.

7.	CHECK FOR DTC*

(a) Refer to DTC Check/Clear.

See page

HINT:

Refer to Diagnostic Trouble Code Chart when any DTCs are output.

See page

Result	Proceed to
DTCs are not output.	A
DTCs are output.	B

8.	PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table.

See page

Result	Proceed to
Fault is not listed in Problem Symptoms Table.	A
Fault is listed in Problem Symptoms Table.	B

9.	OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Refer to Terminals of ECU.

See page

(b) Refer to Data List / Active Test.

See page

10.	REPAIR OR REPLACE

11.	CONFIRMATION TEST

END