Toyota 4Runner: How To Proceed With Troubleshooting

Toyota 4Runner Service Manual / Audio / Visual / Telematics / Cellular Communication / Safety Connect System / How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

Use the following procedures to troubleshoot the Safety Connect system.
*: Use the Techstream.

PROCEDURE

1.	VEHICLE BROUGHT TO WORKSHOP

2.	CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK

When troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.

The following 5 items are important points in the problem analysis:

What	Vehicle model, system name
When	Date, time, frequency of occurrence
Where	Road conditions
Under what conditions?	Driving conditions, weather conditions
How did it happen?	Problem symptoms

3.	INSPECT BATTERY VOLTAGE

(a) Measure the battery voltage.

Standard voltage:

11 to 14 V

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

4.	CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK

5.	VERIFY THAT CUSTOMER SUBSCRIPTION IS ACTIVE

(a) Enter the VIN into Vehicle Inquiry on the Techstream and verify the subscription type and expiration date.

6.	PERFORM HEALTH CHECK

(a) Perform "Health Check" and check for current DTCs (See page ).

Result	Proceed to
No DTC is output	A
DTC is output	B
PRL update required	C

GO TO DIAGNOSTIC TROUBLE CODE CHART

PERFORM PRL UPDATE

7.	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

HINT:

If the symptom does not recur and no DTC is output, perform the symptoms reproduction method (See page ).

GO TO STEP 9

8.	OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Refer to Terminals of ECU (See page ).

(b) Refer to Data List / Active Test (See page
).

9.	ADJUST, REPAIR OR REPLACE

10.	CONFIRMATION TEST

END

System Description

SYSTEM DESCRIPTION 1. DESCRIPTION (a) Safety Connect performs ACN (Automatic Collision Notification), manual emergency calling, stolen vehicle tracking and roadside assistance service, by audio an ...

Dcm Operation History

DCM OPERATION HISTORY 1. DCM OPERATION HISTORY This function shows the telematics network status when the DCM (Telematics Transceiver) was operated. Use this function when no DTC is stored but the ...

Other materials about Toyota 4Runner:

Front Fog Light Circuit
DESCRIPTION The main body ECU receives headlight dimmer switch information signals, and illuminates the front fog light. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuses and bulbs for circuits related to this system before performing ...

System Description
SYSTEM DESCRIPTION 1. DESCRIPTION (a) The steering lock system locks or unlocks the steering by activating the steering lock bar with a motor. The steering lock ECU activates the motor based on signals from the certification ECU and power management cont ...