Lexus Enform System (Diagnostics - Introduction): Other Lexus IS III

PRECAUTION [04/2013 - ]

1. PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE BATTERY TERMINAL NOTE: After the engine switch is turned off, the radio receiver assembly records various types of memory and settings. As a result, after turning the engine switch off, make sure to wait at least 60 seconds before disconnecting the cable from the negative (-) battery terminal. When disconnecting the cable from the negative (-) battery terminal, initialize the following system after the cable is reconnected. System Name See Procedure Air Conditioning System Refer to «INITIALIZATION [04/2013 - ]»(ref-665529-S01115916402014102400000) Variable Gear Ratio Steering System If the cable has been disconnected from the negative (-) battery terminal before 60 seconds has elapsed, it is necessary to initialize the system. To initialize the system, perform the following procedures: Move the vehicle to an open area with good GPS reception. HINT: The GPS icon is displayed on the map screen when the reception is good. Turn the engine switch on (IG), and then wait several minutes while the system acquires time and location data and activates Destination Assist and Destination.

Scheme 167

SYSTEM DIAGRAM [04/2013 - ]

HINT

Refer to following systems for details of the system diagram for LEXUS ENFORM System.

1. Navigation System Refer to «SYSTEM DIAGRAM [04/2013 - ]»(ref-665842-S34179145322014102400000)
2. Safety Connect System Refer to «SYSTEM DIAGRAM [04/2013 - ]»(ref-665566-S25638673452014102400000)

Scheme 168

CAUTION / NOTICE / HINT

HINT

1. Use the following procedure to troubleshoot the LEXUS ENFORM system.
2. *: Use the Techstream.

PROCEDURE

1. VEHICLE BROUGHT TO WORKSHOP Result Proceed to NEXT Result: 1 NEXT See step 2
2. CHECK THE CUSTOMER'S CONTRACT STATUS Check if the satellite radio and LEXUS ENFORM contracts are valid, or if the contract period has ended using the vehicle inquiry function on TIS. Result Result Proceed to Both Contracts are valid. A Contract for satellite radio is not valid. B Contract for LEXUS ENFORM is not valid. C Result: 3 B GO TO NAVIGATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - ]»(ref-665842-S39059601552014102400000) Result: 2 C GO TO SAFETY CONNECT SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - ]»(ref-665566-S39949187282014102400000) Result: 1 A See step 3
3. CHECK CAN COMMUNICATION SYSTEM* Check if CAN communication system DTCs are output. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - ]»(ref-665785-S15342612202014102400000) Result Result Proceed to CAN DTCs are not output. A CAN DTCs are output. B Result: 2 B GO TO CAN COMMUNICATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - ]»(ref-665785-S15342612202014102400000) Result: 1 A See step 4
4. CHECK FOR DTC* Perform Health Check. Refer to «HEALTH CHECK [04/2013 - ]»(ref-665566-S14981125862014102400000) Check for DTCs and note any codes that are output. Clear the DTCs. Recheck for DTCs. Try to reproduce the DTCs by simulating the conditions indicated by the DTCs. Result Result Proceed to DTCs are not output. A Navigation system DTCs are output. B Safety connect system DTCs are output. C LEXUS ENFORM system DTCs are output. D Result: 2 B GO TO NAVIGATION SYSTEM. Refer to «DIAGNOSTIC TROUBLE CODE TABLE [04/2013 - ]»(ref-665842-S06453215322014102400000) Result: 3 C GO TO SAFETY CONNECT SYSTEM. Refer to «DIAGNOSTIC TROUBLE CODE TABLE [04/2013 - ]»(ref-665566-S04196394082014102400000) Result: 4 D GO TO DIAGNOSTIC TROUBLE CODE TABLE. Refer to «DIAGNOSTIC TROUBLE CODE TABLE [04/2013 - ]»(ref-665845-S01973699822014102400000) Result: 1 A See step 5
5. PROBLEM SYMPTOMS TABLE Refer to Problem Symptoms Table. Refer to «PROBLEM SYMPTOMS TABLE [04/2013 - ]»(ref-665845-S21116358192014102400000) Result 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 DTCs are output, perform the simulation method. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - ]»(ref-665529-S21853141262014102400000) Result: 2 B See step 7 Result: 1 A See step 6
6. PERFORM TROUBLESHOOTING* Refer to Terminals of ECU. Refer to «TERMINALS OF ECU [04/2013 - ]»(ref-665845-S00552086032014102400000) Result Proceed to NEXT Result: 1 NEXT See step 7
7. REPAIR OR REPLACE Result Proceed to NEXT Result: 1 NEXT See step 8
8. CONFIRMATION TEST Result Proceed to NEXT Result: 1 NEXT END

TERMINALS OF ECU [04/2013 - ]

1. DCM (TELEMATICS TRANSCEIVER) Refer to «TERMINALS OF ECU [04/2013 - ]»(ref-665566-S01691017642014102400000)
2. RADIO RECEIVER ASSEMBLY Refer to «TERMINALS OF ECU [04/2013 - ]»(ref-665842-S12429427042014102400000)