How To Proceed With Troubleshooting

NOTE:

Use these procedures to troubleshoot the engine immobiliser system.
*: Use the SSM4.

VEHICLE BROUGHT TO WORKSHOP
INSPECT BATTERY VOLTAGE
Standard voltage: 11 to 14V

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

NOTE: A simple method to determine whether the battery is depleted is to operate the horn.
TURN ENGINE SWITCH ON (IG)

Communication function inspection of the CAN communication system

Check CAN communication system. (Refer to HOW TO TROUBLESHOOT )

RESULT DESCRIPTION

Result	Proceed to
Functioning properly	A
Not functioning properly	B

Go to next stepA
Go to "CAN communication system (How to troubleshoot)" (Refer to HOW TO TROUBLESHOOT ).

Communication function inspection of large-scale multiplex communication system for vehicle body [LIN]

Perform a function check of the large-scale multiplex communication system for vehicle body [LIN] to see that no abnormal condition is present in the communication system. (Refer to HOW TO TROUBLESHOOT )

RESULT DESCRIPTION

Result	Proceed to
Functioning properly	A
Not functioning properly	B

Go to next step
To Large-scale multiplex communication system for vehicle body [LIN] (How to troubleshoot) (Refer to HOW TO TROUBLESHOOT )

CHECK FOR DTC (ENTRY AND START SYSTEM)*

Check for DTCs and make a note of any codes that are output.
Clear the DTCs. (See DTC CHECK/CLEAR )

Recheck for DTCs. Based on the DTCs output above, try to duplicate the engine immobiliser system DTC or steering lock system DTC by simulating the symptoms indicated by the DTCs.

RESULT DESCRIPTION

Result	Proceed to
DTC is not output	A
Steering lock system DTC is output (DTC B2781, B2782 or B2788)	B
Engine immobiliser system DTC is output (except DTC B2781, B2782 and B2788)	C

Go to next step
Go to "steering lock system (List of diagnostic codes)" (Refer to LIST OF DIAGNOSTIC CODES )
GO TO DIAGNOSTIC TROUBLE CODE CHART (See DIAGNOSTIC TROUBLE CODE CHART )

CHECK FOR DTC (ECD SYSTEM OR EFI SYSTEM)*

Clear the DTCs. (Refer to DTC CHECK/CLEAR )

Check for DTCs. (Refer to DTC CHECK/CLEAR )

NOTE: The DTCs for the engine immobiliser system are specified above. If other codes are output, check the DTC chart for the EFI system.

RESULT DESCRIPTION

Result	Proceed to
DTC is not output	A
Engine immobiliser system DTC is output (DTC B2799, B279A or B279C)	B
EFI system DTC is output)	C

Go to next step
GO TO DIAGNOSTIC TROUBLE CODE CHART (See DIAGNOSTIC TROUBLE CODE CHART )
To EFI system (list of diagnostic codes) (Refer to DTC TABLE )

PROBLEM SYMPTOMS TABLE

Refer to PROBLEM SYMPTOMS TABLE . (See PROBLEM SYMPTOMS TABLE )

RESULT DESCRIPTION

Result	Proceed to
Fault is not listed in problem symptoms table	A
Fault is listed in problem symptoms table	B

Go to next step
Go to step 10

OVERALL ANALYSIS AND TROUBLESHOOTING*
1. Check Data monitor/active Test (See DTC CHECK/CLEAR ).
2. Check ECM terminal arrangement. (See ECM TERMINAL ARRANGEMENT )
ADJUST, REPAIR OR REPLACE

CHECK FOR DTC*

Clear the DTCs. (See DTC CHECK/CLEAR )

Check for DTCs. (See DTC CHECK/CLEAR )

NOTE: Before checking for DTCs, perform the "DTC Output Confirmation Operation" of each diagnostic procedure. (See DIAGNOSTIC TROUBLE CODE CHART )

RESULT DESCRIPTION

Result	Proceed to
DTC is not output	A
Engine immobiliser system DTC is output	B

Go to next step
GO TO DIAGNOSTIC TROUBLE CODE CHART (See DIAGNOSTIC TROUBLE CODE CHART )

END