Toyota CH-R Service Manual: How To Proceed With Troubleshooting

Toyota CH-R Service Manual / Power Assist Systems / Power Steering System / How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

Use these procedures to troubleshoot the power steering system.
*: Use the Techstream.

PROCEDURE

1.	VEHICLE BROUGHT TO WORKSHOP

2.	INSPECT BATTERY

(a) Turn the ignition switch off.

(b) Measure the voltage of the battery.

Standard Voltage:

11 to 14 V

HINT:

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

3.	CHECK DTC AND FREEZE FRAME DATA*

HINT:

Refer to DTC Check / Clear.

Click here

Chassis > EMPS > Trouble Codes

4.	PROBLEM SYMPTOM CONFIRMATION

Result	Proceed to
Symptom does not occur.	A
Symptom occurs.	B

GO TO STEP 6

5.	SYMPTOM SIMULATION

6.	CHECK CAN COMMUNICATION SYSTEM*

(a) Check for DTCs.

Click here

Result	Proceed to
CAN communication system DTCs are not output.	A
CAN communication system DTCs are output.	B

HINT:

If any CAN communication system DTCs are output, perform troubleshooting for the CAN communication system first.
If communication to the power steering ECU assembly cannot be established through the Techstream, inspect terminals CANH and CANL of the DLC3 and the power steering ECU assembly, and the IG circuit of the power steering ECU assembly.

PROCEED TO CAN COMMUNICATION SYSTEM

7.	CHECK FOR DTC*

(a) Check for DTCs.

Click here

Chassis > EMPS > Trouble Codes

HINT:

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

Click here

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

GO TO STEP 10

8.	PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table.

Click here

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

GO TO STEP 10

9.	OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Refer to Terminals of ECU.

Click here

(b) Refer to Data List / Active Test.

Click here

10.	REPAIR OR REPLACE

11.	CONFIRMATION TEST

END

Calibration

CALIBRATION TORQUE SENSOR ZERO POINT CALIBRATION (USING TECHSTREAM) NOTICE: Perform torque sensor zero point calibration if any of the following conditions occur: The power steering ECU a ...

Problem Symptoms Table

PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are lis ...

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