Toyota 4Runner: How To Proceed With Troubleshooting

Toyota 4Runner Service Manual / Audio / Visual / Telematics / Park Assist / Monitoring / Rear View Monitor System(for Navigation Receiver Type) / How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

Use these procedures to troubleshoot the rear view monitor system.

PROCEDURE

1.	VEHICLE BROUGHT TO WORKSHOP

2.	CUSTOMER PROBLEM ANALYSIS

(a) Ask the customer about the problems and the conditions at the time the malfunction occurred to make sure the problem symptom was not temporarily caused by radio waves in the surrounding environment.

HINT:

The rear view monitor display may be temporarily distorted due to radio waves around the vehicle.

Problem Symptom	Cause
Both of the following conditions are met: The problem symptom indicates a rear view monitor display malfunction and the problem symptom cannot be reproduced. DTC C1622 is output as "Hist" only.*	The display may be temporarily distorted when the vehicle is close to an object that transmits radio waves, such as a telecommunication tower, an airport or a truck equipped with a transceiver.

*: DTCs output as "Hist" will not be output again after DTCs are cleared.

3.	INSPECT BATTERY VOLTAGE

(a) Measure the battery voltage.

Standard Voltage:

11 to 14 V

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

4.	CHECK FOR DTC

(a) Check for DTCs and note any codes that are output (Click here ).

(b) Clear the DTCs (Click here ).

Result	Proceed to
No DTCs are output	A
DTCs are output	B

GO TO STEP 10

5.	PROBLEM SYMPTOM CONFIRMATION

(a) Problem symptom confirmation.

Result	Proceed to
Symptom does not occur	A
Symptom occurs	B

GO TO STEP 7

6.	SYMPTOM SIMULATION

7.	CHECK IF SAME SYMPTOM APPEARS IN NAVIGATION SYSTEM

(a) Refer to Navigation System (See page ).

Result	Proceed to
Symptom does not appear	A
Symptom appears	B

FOLLOW THE NAVIGATION SYMPTOM CHART TO PERFORM TROUBLESHOOTING

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

GO TO STEP 10

9.	BASED ON MALFUNCTION SYMPTOM, PERFORM TROUBLESHOOTING BELOW

(a) Terminals of ECU (See page ).

10.	ADJUST, REPAIR OR REPLACE

11.	CONFIRMATION TEST

END

System Diagram

SYSTEM DIAGRAM ...

System Description

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