How To Proceed With Troubleshooting

HINT:

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

VEHICLE BROUGHT TO WORKSHOP
INSPECT BATTERY VOLTAGE
Standard voltage:

11 to 14 V

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

START HYBRID CONTROL SYSTEM

Result:

RESULT REFERENCE

Result	Proceed to
Power switch cannot be turned ON (ACC) or hybrid control system can be started	A
Power switch can be turned ON (ACC) and hybrid control system cannot be started	B

B: GO TO HYBRID CONTROL SYSTEM

A: GO TO Next Step

INSPECT COMMUNICATION FUNCTION OF MULTIPLEX COMMUNICATION SYSTEM (BEAN)*

Using the intelligent tester, check if the Multiplex Communication System (MPX) is functioning normally (see DTC CHECK / CLEAR ).

Result:

RESULT REFERENCE

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

B: GO TO MULTIPLEX COMMUNICATION SECTION

A: GO TO Next Step

CHECK FOR DTC*

Check for DTCs and note any codes that are output (see DTC CHECK / CLEAR ).
Delete the DTC.

Recheck for DTCs. Based on the DTCs output above, try to force output of the same hybrid control system DTC or engine immobiliser system DTC by simulating the symptoms indicated by the DTC.

Result:

RESULT REFERENCE

Result	Proceed to
DTC output does not reoccur	A
Hybrid control system DTC output reoccurs	B
Engine immobiliser system DTC output reoccurs	C

B: GO TO HYBRID CONTROL SYSTEM

C: GO TO step 8

A: GO TO Next Step

PROBLEM SYMPTOMS TABLE

Result:

RESULT REFERENCE

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

B: GO TO step 8

A: GO TO Next Step

OVERALL ANALYSIS AND TROUBLESHOOTING*
1. DATA LIST/ACTIVE TEST (see DATA LIST / ACTIVE TEST )
2. Terminals of ECU (see TERMINALS OF ECU )
ADJUST, REPAIR OR REPLACE
CONFIRMATION TEST
NEXT: END