How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

• Use the following procedure to troubleshoot the start function.
• *: Use the Techstream.

PROCEDURE

1. VEHICLE BROUGHT TO WORKSHOP

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1. CUSTOMER PROBLEM ANALYSIS CHECK

HINT:

• In 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 problem analysis:

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

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1. INSPECT 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.

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1. CHECK CAN COMMUNICATION SYSTEM*

(a) Use the Techstream to check if the CAN communication system is functioning normally (See page ).

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

B

GO TO CAN COMMUNICATION SYSTEM

A

1. CHECK LIN COMMUNICATION SYSTEM*

(a) Use the Techstream to check if the LIN communication system (LIN) is functioning normally (See page ).

Result	Proceed to
LIN communication DTC is not output	A
LIN communication DTC is output	B

B

GO TO LIN COMMUNICATION SYSTEM

A

1. CHECK FOR DTC*

(a) Check for DTC and note any codes that are output (See page ).

(b) Clear the DTC.

(c) Recheck for DTCs.

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

B

GO TO DIAGNOSTIC TROUBLE CODE CHART

A

1. INSPECT BASIC OPERATION

(a) Check that the engine starts normally when the engine switch is pushed while the brake pedal is depressed and the shift lever is in P.

(b) Check that the power source mode can be changed by pushing the engine switch.

HINT:

Without depressing the brake pedal, push the engine switch repeatedly. The power source mode should change from off to on (ACC), to on (IG) and back to off.

With the brake pedal depressed, push the engine switch. The engine should start regardless of the original power source mode.

OK:

Engine can start normally.

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1. PROBLEM SYMPTOMS TABLE

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

B

GO TO STEP 10

A

1. OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Terminals of ECU (See page )

(b) Data List / Active Test (See page )

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1. REPAIR OR REPLACE

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1. CONFIRMATION TEST

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END