Multiplex Communication: Diagnosis — Lexus LS IV (2006-2012)

HOW TO PROCEED WITH TROUBLESHOOTING

HINT

Use these procedures to troubleshoot the LIN communication system.
*: Use the Techstream.

VEHICLE BROUGHT TO WORKSHOP
INSPECT BATTERY VOLTAGE Standard voltage: 11 to 14 V If the voltage is below 11V, recharge or replace the battery before proceeding.
CHECK FOR DTC (ELECTRICAL POWER CONTROL SYSTEM)* Using the Techstream, check if the electric power control system is functioning normally. Result: RESULT REFERENCE Result Proceed to DTC B22B3 is not output A DTC B22B3 is output B B: GO TO ELECTRIC POWER CONTROL SYSTEM (See «DIAGNOSTIC TROUBLE CODE CHART»(ref-349751-S07630143042009120800000) ) A: Go to next step
INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* Using the Techstream, inspect the CAN communication function to ensure there are no malfunctions in the communication system (see «CAN COMMUNICATION SYSTEM»(ref-349742-S22957258702009120800000) ). Result: RESULT REFERENCE Result Proceed to No DTCs output A DTCs output B B: GO TO «CAN COMMUNICATION SYSTEM»(ref-349742-S22957258702009120800000) A: Go to next step
INSPECT COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM* Using the Techstream, inspect the LIN communication function to ensure there are no malfunctions in the communication system. Result: RESULT REFERENCE Result Proceed to No DTCs output A DTCs output B B: DIAGNOSTIC TROUBLE CODE CHART (See «DIAGNOSTIC TROUBLE CODE CHART»(ref-349747-S25300269312009120800000) ) 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* Data List/Active Test (see «DATA LIST/ACTIVE TEST»(ref-349747-S40228544462009120800000) ) Terminals of ECU (see «TERMINALS OF ECU»(ref-349747-S16380731502009120800000) )
ADJUST, REPAIR OR REPLACE NEXT: END

PROBLEM SYMPTOMS TABLE

HINT

Use the table below to help determine the cause of the problem symptom. The potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
Problem symptoms may occur if the electric power control system's functions malfunction. Follow the «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-349747-S33852239962009120800000) procedures.
Inspect the fuses and relays related to the system before inspecting the suspected areas below.

LIN communication system

Symptom	Suspected Area	See
Rain Sensor LIN Communication Malfunction	LIN communication line	RAIN SENSOR LIN COMMUNICATION MALFUNCTION
	Rain sensor	RAIN SENSOR LIN COMMUNICATION MALFUNCTION
	Front light ECU (Front controller)	RAIN SENSOR LIN COMMUNICATION MALFUNCTION
	Wire harness	RAIN SENSOR LIN COMMUNICATION MALFUNCTION
Rear Heater Control Panel LIN Communication Malfunction	LIN communication line	REAR HEATER CONTROL PANEL LIN COMMUNICATION MALFUNCTION
	Rear power seat module switch	REAR HEATER CONTROL PANEL LIN COMMUNICATION MALFUNCTION
	Air conditioning amplifier	REAR HEATER CONTROL PANEL LIN COMMUNICATION MALFUNCTION
	Wire harness	REAR HEATER CONTROL PANEL LIN COMMUNICATION MALFUNCTION
Seat Vibration System LIN Communication Malfunction	LIN communication line	SEAT VIBRATION SYSTEM LIN COMMUNICATION MALFUNCTION
	Seat vibrator switch	SEAT VIBRATION SYSTEM LIN COMMUNICATION MALFUNCTION
	Seat vibrator module	SEAT VIBRATION SYSTEM LIN COMMUNICATION MALFUNCTION
	Wire harness	SEAT VIBRATION SYSTEM LIN COMMUNICATION MALFUNCTION
Driver Side Switch Module LIN Communication Malfunction	LIN communication line	DRIVER SIDE SWITCH MODULE LIN COMMUNICATION MALFUNCTION
	Outer mirror switch	DRIVER SIDE SWITCH MODULE LIN COMMUNICATION MALFUNCTION
	No. 1 console switch	DRIVER SIDE SWITCH MODULE LIN COMMUNICATION MALFUNCTION
	Front seat climate control ECU LH	DRIVER SIDE SWITCH MODULE LIN COMMUNICATION MALFUNCTION
	Front seat climate control ECU RH	DRIVER SIDE SWITCH MODULE LIN COMMUNICATION MALFUNCTION
	Wire harness	DRIVER SIDE SWITCH MODULE LIN COMMUNICATION MALFUNCTION
Rear Side Switch Module LIN Communication Malfunction	LIN communication line	REAR SIDE SWITCH MODULE LIN COMMUNICATION MALFUNCTION
	Rear power seat module switch	REAR SIDE SWITCH MODULE LIN COMMUNICATION MALFUNCTION
	Position control ECU LH	REAR SIDE SWITCH MODULE LIN COMMUNICATION MALFUNCTION
	Position control ECU RH	REAR SIDE SWITCH MODULE LIN COMMUNICATION MALFUNCTION
	Rear seat climate control ECU LH	REAR SIDE SWITCH MODULE LIN COMMUNICATION MALFUNCTION
	Rear seat climate control ECU RH	REAR SIDE SWITCH MODULE LIN COMMUNICATION MALFUNCTION
	Wire harness	REAR SIDE SWITCH MODULE LIN COMMUNICATION MALFUNCTION

SYMPTOM CHART

Scheme 30

Scheme 30: TERMINALS OF ECU

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Scheme 56

CHECK MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK) Disconnect the DA, L12 and L13 ECU connectors. Measure the resistance and voltage according to the value(s) in the table below. TERMINAL DESCRIPTION Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition DA-40 (GND2) - Body ground W-B - Body ground Ground Always Below 1 ohms DA-41 (GND1) - Body ground W-B - Body ground Ground Always Below 1 ohms L12-1 (AM2) - DA-40 (GND2) W - W-B Battery power supply Always 11 to 14 V L13-6 (AM1) - DA-40 (GND2) W - W-B Battery power supply Always 11 to 14 V If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK MASTER SWITCH ASSEMBLY Disconnect the N13 master switch connector. Measure the resistance and voltage according to the value(s) in the table below. TERMINAL DESCRIPTION Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition N13-11 (B) - N13-12 (GND) B - R Ignition power supply Engine switch off --> Engine switch on (IG) Below 1 V --> 11 to 14 V N13-12 (GND) - Body ground R - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH Disconnect the N11 motor connector. Measure the resistance and voltage according to the value(s) in the table below. TERMINAL DESCRIPTION Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition N11-2 (B) - N11-1 (E) BE - B Battery power supply Always 11 to 14 V N11-1 (E) - Body ground B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH Disconnect the N3 motor connector. Measure the resistance and voltage according to the value(s) in the table below. TERMINAL DESCRIPTION Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition N3-2 (B) - N3-1 (E) BE - B Battery power supply Always 11 to 14 V N3-1 (E) - Body ground B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY LH Disconnect the O19 motor connector. Measure the resistance and voltage according to the value(s) in the table below. TERMINAL DESCRIPTION Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition O19-2 (B) - O19-1 (E) BE - B Battery power supply Always 11 to 14 V O19-1 (E) - Body ground B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH Disconnect the O8 motor connector. Measure the resistance and voltage according to the value(s) in the table below. TERMINAL DESCRIPTION Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition O8-2 (B) - O8-1 (E) BE-B Battery power supply Always 11 to 14 V O8-1 (E) - Body ground B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY (SLIDING ROOF ECU) Disconnect the X5 ECU connector. Measure the resistance and voltage according to the value(s) in the table below. TERMINAL DESCRIPTION Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition X5-1 (B) - X5-2 (E) B - W-B Battery power supply Always 11 to 14 V X5-2 (E) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK CERTIFICATION ECU (SMART KEY ECU) Disconnect the L15 ECU connector. Measure the resistance and voltage according to the value(s) in the table below. TERMINAL DESCRIPTION Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition L15-1 (+B1) - L15-17 (E) L - W-B Battery power supply Always 11 to 14 V L15-17 (E) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK ID CODE BOX (IMMOBILIZER CODE ECU) Disconnect the L32 box connector. Measure the resistance and voltage according to the value(s) in the table below. TERMINAL DESCRIPTION Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition L32-1 (+B) - L32-8 (GND) L - W-B Battery power supply Always 11 to 14 V L32-8 (GND) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) Disconnect the L33 ECU connector. Measure the resistance and voltage according to the value(s) in the table below. TERMINAL DESCRIPTION Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition L33-7 (B) - L33-1 (GND) P - W-B Battery power supply Always 11 to 14 V L33-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK FRONT LIGHT ECU (FRONT CONTROLLER) Disconnect the A50 ECU connector. Measure the resistance and voltage according to the value(s) in the table below. TERMINAL DESCRIPTION Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition A50-1 (FMB3) - A50-2 (E) LG - W-B Battery power supply Always 11 to 14 V A50-5 (FMIG) - A50-2 (E) Y - W-B IG power supply Engine switch off --> Engine switch on (IG) Below 1 V --> 11 to 14 V A50-2 (E) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK RAIN SENSOR Disconnect the X8 sensor connector. Measure the resistance and voltage according to the value(s) in the table below. TERMINAL DESCRIPTION Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition X8-4 (SIG) - X8-1 (ES) LG - BR IG power supply Engine switch off --> Engine switch on (IG) Below 1 V --> 11 to 14 V X8-1 (ES) - Body ground BR - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK LUGGAGE ROOM JUNCTION BLOCK ASSEMBLY (REAR JUNCTION BLOCK ECU) Disconnect the LA and LD ECU connectors. Measure the voltage and resistance according to the value(s) in the table below. TERMINAL DESCRIPTION Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition LD-4 (MPXB) - LA-29 (SG) R - W-B Battery power supply Always 11 to 14 V LA-29 (SG) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK MAP LIGHT ASSEMBLY (OVERHEAD JUNCTION ECU) Disconnect the X4 ECU connector. Measure the voltage and resistance according to the value(s) in the table below. TERMINAL DESCRIPTION Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition X4-6 (+B) - X4-16 (GND9) B - B Battery power supply Always 11 to 14 V X4-16 (GND9) - Body ground B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK OUTER MIRROR SWITCH Disconnect the L6 switch connector. Measure the resistance and voltage according to the value(s) in the table below. TERMINAL DESCRIPTION Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition L6-1 (E) - Body ground W-B - Body ground Ground Always Below 1 ohms L6-11 (IG) - L6-1 (E) G - W-B IG power supply Engine switch off --> Engine switch on (IG) Below 1 V --> 11 to 14 V L6-12 (B) - L6-1 (E) B - W-B Battery power supply Always 11 to 14 V If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK No. 1 CONSOLE SWITCH Disconnect the L75 switch connector. Measure the resistance and voltage according to the value(s) in the table below. TERMINAL DESCRIPTION Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition L75-1 (B) - L75-5 (E) B - W-B Battery power supply Always 11 to 14 V L75-5 (E) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK FRONT SEAT CLIMATE CONTROL ECU LH Disconnect the e34 ECU connector. Measure the resistance and voltage according to the value(s) in the table below. TERMINAL DESCRIPTION Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition e34-1 (IG) - e34-12 (GND) P - W-B IG power supply Engine switch off --> Engine switch on (IG) Below 1 V --> 11 to 14 V e34-2 (SYSB) - e34-12 (GND) R - W-B Battery power supply Always 11 to 14 V e34-12 (GND) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK FRONT SEAT CLIMATE CONTROL ECU RH Disconnect the e4 ECU connector. Measure the resistance and voltage according to the value(s) in the table below. TERMINAL DESCRIPTION Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition e4-1 (IG) - e4-12 (GND) Y - W-B IG power supply Engine switch off --> Engine switch on (IG) Below 1 V --> 11 to 14 V e4-2 (SYSB) - e4-12 (GND) W - W-B Battery power supply Always 11 to 14 V e4-11 (VER) - Body ground W-B - Body ground Ground Always Below 1 ohms e4-12 (GND) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY Disconnect the L76 ECU connector. Measure the resistance and voltage according to the value(s) in the table below. TERMINAL DESCRIPTION Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition L76-5 (IG+) - L76-1 (GND) V - W-B IG power supply Engine switch off --> Engine switch on (IG) Below 1 V --> 11 to 14 V L76-6 (+B1) - L76-1 (GND) L - W-B Battery power supply Always 11 to 14 V L76-7 (+B2) - L76-1 (GND) L - W-B Battery power supply Always 11 to 14 V L76-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK REAR POWER SEAT MODULE SWITCH (except Ottoman) Disconnect the r2 switch connector. Measure the resistance and voltage according to the value(s) in the table below. TERMINAL DESCRIPTION Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition r2-11 (B) - r2-3 (E) R - W-B Battery power supply Always 11 to 14 V r2-3 (E) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK REAR POWER SEAT MODULE SWITCH (for Ottoman) Disconnect the S15 switch connector. Measure the resistance and voltage according to the value(s) in the table below. TERMINAL DESCRIPTION Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition S15-6 (B) - S15-5 (E) R - W-B Battery power supply Always 11 to 14 V S15-5 (E) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK POSITION CONTROL ECU RH Disconnect the f5 ECU connector. Measure the resistance and voltage according to the value(s) in the table below. TERMINAL DESCRIPTION Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition f5-6 (SYSB) - f5-12 (SGND) R - BR Battery power supply Always 10 to 14 V f5-1 (SEL) - f5-11 (SEL2) B - B Right or left identification Always Below 1 ohms f5-12 (SGND) -Body ground BR - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK POSITION CONTROL ECU LH Disconnect the f25 ECU connector. Measure the resistance and voltage according to the value(s) in the table below. TERMINAL DESCRIPTION Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition f25-6 (SYSB) - f25-12 (SGND) R - BR Battery power supply Always 10 to 14 V f25-12 (SGND) -Body ground BR - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK REAR SEAT CLIMATE CONTROL ECU RH Disconnect the f8 ECU connector. Measure the resistance and voltage according to the value(s) in the table below. TERMINAL DESCRIPTION Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition f8-1 (IG) - f8-12 (GND) Y - W-B IG power supply Engine switch off --> Engine switch on (IG) Below 1 V --> 11 to 14 V f8-2 (SYSB) - f8-12 (GND) G - W-B Battery power supply Always 11 to 14 V f8-11 (VER) - Body ground W-B - Body ground Ground Always Below 1 ohms f8-12 (GND) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK REAR SEAT CLIMATE CONTROL ECU LH Disconnect the f28 ECU connector. Measure the resistance and voltage according to the value(s) in the table below. TERMINAL DESCRIPTION Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition f28-1 (IG) - f28-12 (GND) P - W-B IG power supply Engine switch off --> Engine switch on (IG) Below 1 V --> 11 to 14 V f28-2 (SYSB) - f28-12 (GND) V - W-B Battery power supply Always 11 to 14 V f28-12 (GND) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK SEAT VIBRATION MODULE ASSEMBLY Disconnect the S29 module connector. Measure the resistance and voltage according to the value(s) in the table below. TERMINAL DESCRIPTION Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition S29-1 (IG) - S29-8 (GND) BR - W-B IG power supply Engine switch off --> Engine switch on (IG) Below 1 V --> 11 to 14 V S29-8 (GND) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK INFRARED RAY SENSOR (for Ottoman) Disconnect the X13 sensor connector. Measure the resistance and voltage according to the value(s) in the table below. TERMINAL DESCRIPTION Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition X13-5 (IG) - Body ground L - Body ground IG power supply Engine switch off --> Engine switch on (IG) Below 1 V --> 11 to 14 V X13-1 (E) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.

DTC CHECK/CLEAR

HINT

Refer to the Techstream operator's manual for further details.

CHECK DTC Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Enter the following menus: Body Electrical/(desired system)/Trouble Codes. Read the DTCs by following the directions on the screen.
CLEAR DTC Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Enter the following menus: Body Electrical/(desired system)/Trouble Codes. Erase the DTCs by following the directions on the screen.

DATA LIST/ACTIVE TEST

DATA LIST HINT: Using the Techstream to read the Data List allows values or status of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time. NOTE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not. Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Enter the following menus: Body Electrical/(desired system)/Data List. According to the display on the Techstream, read the "Data List". Main Body: ITEM RANGE REFERENCE Tester Display Measurement Item/Range Normal Condition Diagnostic Note Communication D-Door Motor Connection status between power window regulator motor (for driver side) and main body ECU/OK or STOP OK: Connection STOP: No connection When there is malfunction, DTC is output Communication P-Door Motor Connection status between power window regulator motor (for front passenger side) and main body ECU/OK or STOP OK: Connection STOP: No connection When there is malfunction, DTC is output Communication RR-Door Motor Connection status between power window regulator motor (for rear RH) and main body ECU/OK or STOP OK: Connection STOP: No connection When there is malfunction, DTC is output Communication RL-Door Motor Connection status between power window regulator motor (for rear LH) and main body ECU/OK or STOP OK: Connection STOP: No connection When there is malfunction, DTC is output Communication Slide Roof Connection status between sliding roof ECU and main body ECU/OK or STOP OK: Connection STOP: No connection When there is malfunction, DTC is output Communication Master SW Connection status between power window ECU (master switch) and main body ECU/OK or STOP OK: Connection STOP: No connection When there is malfunction, DTC is output Body No. 5: ITEM RANGE REFERENCE Tester Display Measurement Item/Range Normal Condition Diagnostic Note LIN Communication Status of LIN communication/Without or With Without: No connection With: Connection - Curr Comm Rain Sensor Current communication with rain sensor/OK or Stop OK: Connection Stop: No connection - Hist Comm Rain Sensor History communication with rain sensor/OK or Stop OK: Connection Stop: No connection - Body No. 4: ITEM RANGE REFERENCE Tester Display Measurement Item/Range Normal Condition Diagnostic Note LIN Communication Status of LIN communication/Without or With Without: No connection With: Connection When there is malfunction, DTC is output D-SEAT SW: ITEM RANGE REFERENCE Tester Display Measurement Item/Range Normal Condition Diagnostic Note Communication FR Seat A/C Current communication with seat climate control controller RH (for driver side)/WITHOUT or WITH WITHOUT: No connection WITH: Connection When there is malfunction, DTC is output Communication FL Seat A/C Current communication with seat climate control controller LH (for front passenger side)/WITHOUT or WITH WITHOUT: No connection WITH: Connection When there is malfunction, DTC is output Communication Center Console Switch Current communication with No. 1 console switch/WITHOUT or WITH WITHOUT: No connection WITH: Connection When there is malfunction, DTC is output Rear Console Switch: ITEM RANGE REFERENCE Tester Display Measurement Item/Range Normal Condition Diagnostic Note Communication RR Seat Current communication with position control ECU (for rear RH) /WITHOUT or WITH WITHOUT: No connection WITH: Connection When there is malfunction, DTC is output Communication RL Seat Current communication with position control ECU (for rear LH)/WITHOUT or WITH WITHOUT: No connection WITH: Connection When there is malfunction, DTC is output Communication RR Seat A/C Current communication with seat climate control controller RH (for rear RH)/WITHOUT or WITH WITHOUT: No connection WITH: Connection When there is malfunction, DTC is output Communication RL Seat A/C Current communication with seat climate control controller LH (for rear LH)/WITHOUT or WITH WITHOUT: No connection WITH: Connection When there is malfunction, DTC is output

DIAGNOSTIC TROUBLE CODE CHART

HINT

If a trouble code is displayed during the DTC check, inspect the trouble areas listed for that code. For details of the code, refer to the "DTC Code" below.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.

LIN Communication System

DTC Code	Detection Item	Trouble Area
B1206	P/W Master Switch Communication Stop	Main body ECU (driver side junction block) Master switch Harness or connector
B1273	Sliding Roof ECU Communication Stop	Main body ECU (driver side junction block) Sliding roof drive gear sub-assembly (Sliding roof ECU) Harness or connector
B1492/92	Infrared Ray Sensor Communication Malfunction	Infrared ray sensor Air conditioning amplifier Harness or connector
B2287	LIN Communication Master Malfunction	Main body ECU (driver side junction block) Certification ECU (Smart key ECU) Harness or connector
B2321	Driver Side Door ECU Communication Stop	Main body ECU (driver side junction block) Front power window regulator motor LH Harness or connector
B2322	Front Passenger Side Door ECU Communication Stop	Main body ECU (driver side junction block) Front power window regulator motor RH Harness or connector
B2323	Rear Door RH ECU Communication Stop	Main body ECU (driver side junction block) Rear power window regulator motor RH Harness or connector
B2324	Rear Door LH ECU Communication Stop	Main body ECU (driver side junction block) Rear power window regulator motor LH Harness or connector
B2325	LIN Communication Bus Malfunction	Main body ECU (driver side junction block) Master switch Front power window regulator motor LH Front power window regulator motor RH Rear power window regulator motor LH Rear power window regulator motor RH Sliding roof drive gear sub-assembly (sliding roof ECU) Harness or connector
B2405	Sub Bus LIN Module Communication Malfunction	Luggage room junction block (rear junction block ECU) Map light assembly (overhead junction block) Harness or connector
B2785	Communication Malfunction between ECUs Connected by LIN	Certification ECU (smart key ECU) Main body ECU (driver side junction block) ID code box (immobilizer code ECU) Steering lock actuator assembly (steering lock ECU) Harness or connector
B2786	No Response from Steering Lock ECU	Certification ECU (smart key ECU) Steering lock actuator assembly (steering lock ECU) Harness or connector
B2789	No Response from ID BOX	Certification ECU (smart key ECU) ID code box (immobilizer code ECU) Harness or connector
U0211	Lost Communication with Rear Seat Control ECU RH	Rear power seat module switch Position control ECU RH Harness or connector
U0246	Lost Communication with Rear Seat Control ECU LH	Rear power seat module switch Position control ECU LH Harness or connector
U1127	Lost Communication with Center Console Switch ECU	Outer mirror switch No. 1 console switch Harness or connector
U1128	Lost Communication with Front Climate Control Seat ECU RH	Outer mirror switch Front seat climate control ECU RH Harness or connector
U1129	Lost Communication with Front Climate Control Seat ECU LH	Outer mirror switch Front seat climate control ECU LH Harness or connector
U1130	Lost Communication with Rear Climate Control Seat ECU RH	Rear power seat module switch Rear seat climate control ECU RH Harness or connector
U1131	Lost Communication with Rear Climate Control Seat ECU LH	Rear power seat module switch Rear seat climate control ECU LH Harness or connector

DTC CODE CHART

INSPECTION PROCEDURE

Note. When using the Techstream with the engine switch off to troubleshoot: Connect the Techstream to the vehicle, and turn a courtesy switch on and off at 1.5 second intervals until communication between the Techstream and vehicle begins.

HINT

DTC B2325 is output when the communication between all of the following components and main body ECU (driver side junction block) stops.

Scheme 57

Scheme 57: INSPECTION PROCEDURE

Scheme 58

CLEAR DTC Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC B1206 is not output. NG: Go to step 3 OK: USE SIMULATION METHOD TO CHECK (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-349706-S05264741182009120800000) )
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - MASTER SWITCH) Disconnect the L11 ECU connector. Disconnect the N13 switch connector. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition L11-10 (LIN2) - N13-17 (LIN1) Always Below 1 ohms L11-10 (LIN2) or N13-17 (LIN1) - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK MASTER SWITCH ASSEMBLY (BATTERY VOLTAGE AND GROUND) Disconnect the N13 switch connector. Measure the resistance and voltage according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition N13-12 (GND) - Body ground Always Below 1 ohms Standard voltage VOLTAGE SPECIFICATION Tester Connection Condition Specified Condition N13-11 (B) - Body ground Always 11 to 14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
REPLACE MASTER SWITCH ASSEMBLY Temporarily replace the master switch with a new or normally functioning one (see «REMOVAL»(ref-349743-S08783415772009120800000) ). Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC B1206 is not output. NG: REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK) OK: END (MASTER SWITCH IS DEFECTIVE)

HINT

DTC B2325 is output when the communication between all of the following components and main body ECU (driver side junction block) stops.

Scheme 59

Scheme 59: INSPECTION PROCEDURE

Scheme 60

CLEAR DTC Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC B1273 is not output. NG: Go to step 3 OK: USE SIMULATION METHOD TO CHECK (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-349706-S05264741182009120800000) )
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - SLIDING ROOF DRIVE GEAR) Disconnect the L11 ECU connector. Disconnect the X5 gear connector. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition L11-10 (LIN2) - X5-4 (MPX1) Always Below 1 ohms L11-10 (LIN2) or X5-4 (MPX1) - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY (BATTERY VOLTAGE AND GROUND) Disconnect the X5 gear connector. Measure the resistance and voltage according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition X5-2 (E) - Body ground Always Below 1 ohms Standard voltage VOLTAGE SPECIFICATION Tester Connection Condition Specified Condition X5-1 (B) - Body ground Always 11 to 14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY (SLIDING ROOF ECU) Temporarily replace the sliding roof gear with a new or normally functioning one (see «DISASSEMBLY»(ref-349761-S21755022332009120800000) ). Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC B1273 is not output. NG: REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK) OK: END (SLIDING ROOF DRIVE GEAR IS DEFECTIVE)

HINT

When DTC B2287 and B2785 are output simultaneously, perform the troubleshooting for DTC B2785 first (see DTC B2785 COMMUNICATION MALFUNCTION BETWEEN ECUS CONNECTED BY LIN ).

Scheme 61

Scheme 61: INSPECTION PROCEDURE

CLEAR DTC Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC B2287 is not output. NG: Go to step 3 OK: USE SIMULATION METHOD TO CHECK (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-349706-S05264741182009120800000) )
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - MAIN BODY ECU) Disconnect the L15 and DA ECU connectors. Measure the resistance and voltage according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition L15-10 (LIN) - DA-52 (LIN1) Always Below 1 ohms L15-10 (LIN) or DA-52 (LIN1) - Body ground Always 10 kohms or higher Standard voltage VOLTAGE SPECIFICATION Tester Connection Condition Specified Condition L15-10 (LIN) or DA-52 (LIN1) - Body ground Always Below 1 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK) Temporarily replace the main body ECU with a new or normally functioning one. Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC B2287 is not output. NG: REPLACE CERTIFICATION ECU (SMART KEY ECU) OK: END (MAIN BODY ECU IS DEFECTIVE)

HINT

DTC B2325 is output when the communication between all of the following components and main body ECU (driver side junction block) stops.

Scheme 62

Scheme 62: INSPECTION PROCEDURE

Scheme 63

CLEAR DTC Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC B2321 is not output. NG: Go to step 3 OK: USE SIMULATION METHOD TO CHECK (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-349706-S05264741182009120800000) )
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - FRONT POWER WINDOW REGULATOR MOTOR) Disconnect the L11 ECU connector. Disconnect the N11 motor connector. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition L11-10 (LIN2) - N11-9 (LIN) Always Below 1 ohms L11-10 (LIN2) or N11-9 (LIN) - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK FRONT POWER WINDOW REGULATOR MOTOR LH (BATTERY VOLTAGE AND GROUND) Disconnect the N11 motor connector. Measure the resistance and voltage according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition N11-2 (B) - Body ground Always Below 1 ohms Standard voltage VOLTAGE SPECIFICATION Tester Connection Condition Specified Condition N11-1 (E) - Body ground Always 11 to 14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
REPLACE FRONT POWER WINDOW REGULATOR MOTOR LH Temporarily replace the front power window regulator motor LH with a new or normally functioning one (see «REMOVAL»(ref-349743-S08783415772009120800000) ). Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC B2321 is not output. NG: REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK) OK: END (FRONT POWER WINDOW REGULATOR MOTOR IS DEFECTIVE)

HINT

DTC B2325 is output when the communication between all of the following components and main body ECU (driver side junction block) stops.

Scheme 64

Scheme 64: INSPECTION PROCEDURE

Scheme 65

CLEAR DTC Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC B2322 is not output. NG: Go to step 3 OK: USE SIMULATION METHOD TO CHECK (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-349706-S05264741182009120800000) )
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - FRONT POWER WINDOW REGULATOR MOTOR) Disconnect the L11 ECU connector. Disconnect the N3 motor connector. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition L11-10 (LIN2) - N3-9 (LIN) Always Below 1 ohms L11-10 (LIN2) or N3-9 (LIN) - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK FRONT POWER WINDOW REGULATOR MOTOR RH (BATTERY VOLTAGE AND GROUND) Disconnect the N3 motor connector. Measure the resistance and voltage according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition N3-1 (E) - Body ground Always Below 1 ohms Standard voltage VOLTAGE SPECIFICATION Tester Connection Condition Specified Condition N3-2 (B) - Body ground Always 11 to 14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
REPLACE FRONT POWER WINDOW REGULATOR MOTOR RH Temporarily replace the front power window regulator motor assembly RH with a new or normally functioning one (see «REMOVAL»(ref-349743-S08783415772009120800000) ). Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC B2322 is not output. NG: REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK) OK: END (FRONT POWER WINDOW REGULATOR MOTOR IS DEFECTIVE)

HINT

DTC B2325 is output when the communication between all of the following components and main body ECU (driver side junction block) stops.

Scheme 66

Scheme 66: INSPECTION PROCEDURE

Scheme 67

CLEAR DTC Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC B2323 is not output. NG: Go to step 3 OK: USE SIMULATION METHOD TO CHECK (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-349706-S05264741182009120800000) )
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - REAR POWER WINDOW REGULATOR MOTOR RH) Disconnect the L11 ECU connector. Disconnect the O8 motor connector. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition L11-10 (LIN2) - O8-9 (LIN) Always Below 1 ohms L11-10 (LIN2) or O8-9 (LIN) - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK REAR POWER WINDOW REGULATOR MOTOR RH (BATTERY VOLTAGE AND GROUND) Disconnect the O8 motor connector. Measure the resistance and voltage according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition O8-1 (E) - Body ground Always Below 1 ohms Standard voltage VOLTAGE SPECIFICATION Tester Connection Condition Specified Condition O8-2 (B) - Body ground Always 11 to 14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
REPLACE REAR POWER WINDOW REGULATOR MOTOR RH Temporarily replace the rear power window regulator motor RH with a new or normally functioning one (see «REMOVAL»(ref-349743-S08783415772009120800000) ). Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC B2323 is not output. NG: REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK) OK: END (REAR POWER WINDOW REGULATOR MOTOR RH IS DEFECTIVE)

HINT

DTC B2325 is output when the communication between all of the following components and main body ECU (driver side junction block) stops.

Scheme 68

Scheme 68: INSPECTION PROCEDURE

Scheme 69

CLEAR DTC Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC B2324 is not output. NG: Go to step 3 OK: USE SIMULATION METHOD TO CHECK (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-349706-S05264741182009120800000) )
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - REAR POWER WINDOW REGULATOR MOTOR LH) Disconnect the L11 ECU connector. Disconnect the O19 motor connector. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition L11-10 (LIN2) - O19-9 (LIN) Always Below 1 ohms L11-10 (LIN2) or O19-9 (LIN) - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK REAR POWER WINDOW REGULATOR MOTOR LH (BATTERY VOLTAGE AND GROUND) Disconnect the O19 motor connector. Measure the resistance and voltage according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition O19-1 (E) - Body ground Always Below 1 ohms Standard voltage VOLTAGE SPECIFICATION Tester Connection Condition Specified Condition O19-2 (B) - Body ground Always 11 to 14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
REPLACE REAR POWER WINDOW REGULATOR MOTOR LH Temporarily replace the rear power window regulator motor LH with a new or normally functioning one (see «REMOVAL»(ref-349743-S08341206512009120800000) ). Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC B2324 is not output. NG: REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK) OK: END (REAR POWER WINDOW REGULATOR MOTOR LH IS DEFECTIVE)

HINT

When DTC B2325 and a LIN communication stop DTC are output simultaneously, first perform the troubleshooting for the LIN communication stop DTC. Then perform the troubleshooting for DTC B2325.

Scheme 70

Scheme 70: INSPECTION PROCEDURE

CLEAR DTC Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC B2325 is not output. NG: Go to step 3 OK: USE SIMULATION METHOD TO CHECK (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-349706-S05264741182009120800000) )
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - MASTER SWITCH) Disconnect the L11 ECU connector. Disconnect the N13 switch connector. Measure the resistance and voltage according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition L11-10 (LIN2) - N13-17 (LIN1) Always Below 1 ohms L11-10 (LIN2) or N13-17 (LIN1) -Body ground Always 10 kohms or higher Standard voltage VOLTAGE SPECIFICATION Tester Connection Condition Specified Condition L11-10 (LIN2) or N13-17 (LIN1) - Body ground Always Below 1 V OK: REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK) NG: Go to next step
CLEAR DTC Reconnect the L11 ECU connector. Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Disconnect the N13 switch connector. Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). Result: RESULT REFERENCE Result Proceed to DTC B2325 is output A DTC B1206 is output B B: REPLACE MASTER SWITCH (See «REMOVAL»(ref-349743-S08783415772009120800000) ) A: Go to next step
CLEAR DTC Reconnect the N13 switch connector. Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Disconnect the N11 motor connector. Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). Result: RESULT REFERENCE Result Proceed to DTC B2325 is output A DTC B2321 is output B B: REPLACE FRONT POWER WINDOW REGULATOR MOTOR LH (See «REMOVAL»(ref-349743-S08783415772009120800000) ) A: Go to next step
CLEAR DTC Reconnect the N11 motor connector. Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Disconnect the N3 motor connector. Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). Result: RESULT REFERENCE Result Proceed to DTC B2325 is output A DTC B2322 is output B B: REPLACE FRONT POWER WINDOW REGULATOR MOTOR RH (See «REMOVAL»(ref-349743-S08783415772009120800000) ) A: Go to next step
CLEAR DTC Reconnect the N3 motor connector. Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Disconnect the O8 motor connector. Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). Result: RESULT REFERENCE Result Proceed to DTC B2325 is output A DTC B2323 is output B B: REPLACE REAR POWER WINDOW REGULATOR MOTOR RH (See «REMOVAL»(ref-349743-S08341206512009120800000) ) A: Go to next step
CLEAR DTC Reconnect the O8 motor connector. Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Disconnect the O19 motor connector. Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). Result: RESULT REFERENCE Result Proceed to DTC B2325 is output (w/ Sliding roof system) A DTC B2325 is output (w/o Sliding roof system) B DTC B2324 is output C B: REPAIR OR REPLACE HARNESS OR CONNECTOR C: REPLACE REAR POWER WINDOW REGULATOR MOTOR LH (See «REMOVAL»(ref-349743-S08341206512009120800000) ) A: Go to next step
CLEAR DTC Reconnect the O19 motor connector. Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Disconnect the X5 gear connector. Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). Result: RESULT REFERENCE Result Proceed to DTC B2325 is output A DTC B1273 is output B B: REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY (SLIDING ROOF ECU) (See «DISASSEMBLY»(ref-349761-S21755022332009120800000) ) A: REPAIR OR REPLACE HARNESS OR CONNECTOR

Scheme 71

Scheme 71: INSPECTION PROCEDURE

Scheme 72

CHECK HARNESS AND CONNECTOR (REAR JUNCTION BLOCK ECU - MAP LIGHT) Disconnect the S62 junction block connector. Disconnect the X6 light connector. Measure the resistance and voltage according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition S62-9 (LIN) - X6-2 (LIN) Always Below 1 ohms S62-9 (LIN) or X6-2 (LIN) - Body ground Always 10 kohms or higher Standard voltage VOLTAGE SPECIFICATION Tester Connection Condition Specified Condition S62-9 (LIN) or X6-2 (LIN) - Body ground Always Below 1 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK MAP LIGHT (BATTERY VOLTAGE AND GROUND) Disconnect the X4 light connector. Measure the resistance and voltage according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition X4-16 (GND9) - Body ground Always Below 1 ohms Standard voltage VOLTAGE SPECIFICATION Tester Connection Condition Specified Condition X4-6 (+B) - Body ground Always 11 to 14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
REPLACE MAP LIGHT ASSEMBLY (OVERHEAD JUNCTION BLOCK) Temporarily replace the map light with a new or normally functioning one (see «REMOVAL»(ref-349731-S26125408272009120800000) ). Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC B2405 is not output. NG: REPLACE LUGGAGE ROOM JUNCTION BLOCK (REAR JUNCTION BLOCK ECU) OK: END (MAP LIGHT IS DEFECTIVE)

HINT

When DTC B2785 and B2287 are output simultaneously, perform the troubleshooting for DTC B2785 first.

Scheme 73

Scheme 73: INSPECTION PROCEDURE

Scheme 74

Scheme 75

CLEAR DTC Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC B2785 is not output. NG: Go to step 3 OK: USE SIMULATION METHOD TO CHECK (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-349706-S05264741182009120800000) )
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - MAIN BODY ECU) Disconnect the L15 and DA ECU connectors. Measure the resistance and voltage according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition L15-10 (LIN) - DA-52 (LIN1) Always Below 1 ohms L15-10 (LIN) or DA-52 (LIN1) - Body ground Always 10 kohms or higher Standard voltage VOLTAGE SPECIFICATION Tester Connection Condition Specified Condition L15-10 (LIN) or DA-52 (LIN1) -Body ground Always Below 1 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - BODY GROUND) Reconnect the DA ECU connector. Disconnect the L15 ECU connector. Measure the resistance and voltage according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition L15-10 (LIN) - Body ground Always 10 kohms or higher Standard voltage VOLTAGE SPECIFICATION Tester Connection Condition Specified Condition L15-10 (LIN) - Body ground Always Below 1 V NG: Go to step 5 OK: REPLACE CERTIFICATION ECU (SMART KEY ECU)
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BODY GROUND) Disconnect the DA ECU connector. Measure the resistance and voltage according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition DA-23 (LIN1) - Body ground Always 10 kohms or higher Standard voltage VOLTAGE SPECIFICATION Tester Connection Condition Specified Condition DA-23 (LIN1) - Body ground Always Below 1 V NG: Go to step 6 OK: REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK)
CLEAR DTC Reconnect the L15 ECU connector. Reconnect the DA ECU connector. Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Disconnect the L33 ECU connector. Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). Result: RESULT REFERENCE Result Proceed to DTC B2785 is output A DTC B2786 is output B B: REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) (See «DISASSEMBLY»(ref-349720-S21651440712009120800000) ) A: Go to next step
CLEAR DTC Reconnect the L33 ECU connector. Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Disconnect the L32 box connector. Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). Result: RESULT REFERENCE Result Proceed to DTC B2785 is output A DTC B2789 is output B B: REPLACE ID CODE BOX (IMMOBILIZER CODE ECU) A: REPAIR OR REPLACE HARNESS OR CONNECTOR

HINT

DTC B2785 is output when the communication between all of the following components and certification ECU (smart key ECU) stops.

Scheme 76

Scheme 76: INSPECTION PROCEDURE

Scheme 77

CLEAR DTC Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC B2786 is not output. NG: Go to step 3 OK: USE SIMULATION METHOD TO CHECK (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-349706-S05264741182009120800000) )
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - STEERING LOCK ECU) Disconnect the L15 and L33 ECU connectors. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition L15-10 (LIN) - L33-5 (LIN) Always Below 1 ohms L15-10 (LIN) or L33-5 (LIN) - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK STEERING LOCK ACTUATOR ASSEMBLY (BATTERY VOLTAGE AND GROUND) Disconnect the L33 ECU connector. Measure the resistance and voltage according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition L33-1 (GND) - Body ground Always Below 1 ohms Standard voltage VOLTAGE SPECIFICATION Tester Connection Condition Specified Condition L33-7 (B) - Body ground Always 11 to 14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) Temporarily replace the steering lock actuator with a new one (see «DISASSEMBLY»(ref-349720-S21651440712009120800000) ). Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC B2786 is not output. NG: REPLACE CERTIFICATION ECU (SMART KEY ECU) OK: END (STEERING LOCK ECU IS DEFECTIVE)

HINT

DTC B2785 is output when the communication between all of the following components and certification ECU (smart key ECU) stops.

Scheme 78

Scheme 78: INSPECTION PROCEDURE

Scheme 79

CLEAR DTC Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC B2789 is not output. NG: Go to step 3 OK: USE SIMULATION METHOD TO CHECK (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-349706-S05264741182009120800000) )
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - ID CODE BOX) Disconnect the L15 ECU connector. Disconnect the L32 box connector. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition L15-10 (LIN) - L32-3 (LIN1) Always Below 1 ohms L15-10 (LIN) or L32-3 (LIN1) - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK ID CODE BOX (BATTERY VOLTAGE AND GROUND) Disconnect the L32 box connector. Measure the resistance and voltage according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition L32-8 (GND) - Body ground Always Below 1 ohms Standard voltage VOLTAGE SPECIFICATION Tester Connection Condition Specified Condition L32-1 (+B) - Body ground Always 11 to 14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
REPLACE ID CODE BOX (IMMOBILISER CODE ECU) Temporarily replace the ID code box (immobilizer code ECU) with a new one. Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC B2789 is not output. NG: REPLACE CERTIFICATION ECU (SMART KEY ECU) OK: END (ID CODE BOX IS DEFECTIVE)

HINT

When DTC U0211, U0246, U1130 and U1131 are output simultaneously, perform troubleshooting for "Rear Side Switch Module LIN Communication Malfunction" first (see REAR SIDE SWITCH MODULE LIN COMMUNICATION MALFUNCTION ).

Scheme 80

Scheme 80: INSPECTION PROCEDURE

Scheme 81

CLEAR DTC Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC U0211 is not output. NG: Go to step 3 OK: USE SIMULATION METHOD TO CHECK (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-349706-S05264741182009120800000) )
CHECK HARNESS AND CONNECTOR (REAR POWER SEAT MODULE SWITCH - POSITION CONTROL ECU RH) Disconnect the r2*1 or S15*2 module switch connector. HINT: *1: except Ottoman *2: for Ottoman Disconnect the f5 ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance except Ottoman: SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition r2-6 (LIN) - f5-7 (LIN) Always Below 1 ohms for Ottoman: SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition S15-3 (LIN) - f5-7 (LIN) Always Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK POSITION CONTROL ECU RH (BATTERY VOLTAGE AND GROUND) Disconnect the f5 ECU connector. Measure the resistance and voltage according to the value(s) in the table below. Standard voltage VOLTAGE SPECIFICATION Tester Connection Condition Specified Condition f5-6 (SYSB) - Body ground Always 11 to 14 V Standard resistance SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition f5-1 (SEL) - f5-11 (SEL2) Always Below 1 ohms f5-12 (SGND) - Body ground Always Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
REPLACE POSITION CONTROL ECU RH Temporarily replace the position control ECU RH with a new or normally functioning one. Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC U0211 is not output. NG: REPLACE REAR POWER SEAT MODULE SWITCH (See «REMOVAL»(ref-349754-S36108262392009120800000) ) OK: END (POSITION CONTROL ECU RH IS DEFECTIVE)

HINT

Scheme 82

Scheme 82: INSPECTION PROCEDURE

Scheme 83

CLEAR DTC Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC U0246 is not output. NG: Go to step 3 OK: USE SIMULATION METHOD TO CHECK (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-349706-S05264741182009120800000) )
REPAIR OR REPLACE HARNESS OR CONNECTOR (REAR POWER SEAT MODULE SWITCH - POSITION CONTROL ECU LH) Disconnect the r2*1 or S15*2 module switch connector. HINT: *1: except Ottoman *2: for Ottoman Disconnect the f25 ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance except Ottoman: SPECIFIED CONDITION CHART Tester Connection Switch Condition Specified Condition r2-6 (LIN) - f25-7 (LIN) Always Below 1 ohms for Ottoman: SPECIFIED CONDITION CHART Tester Connection Switch Condition Specified Condition S15-3 (LIN) - f25-7 (LIN) Always Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
POSITION CONTROL ECU LH (BATTERY VOLTAGE AND GROUND) Disconnect the f25 ECU connector. Measure the resistance and voltage according to the value(s) in the table below. Standard voltage VOLTAGE SPECIFICATION Tester Connection Switch Condition Specified Condition f25-6 (SYSB) - Body ground Always 11 to 14 V Standard resistance SPECIFIED CONDITION CHART Tester Connection Switch Condition Specified Condition f25-12 (SGND) - Body ground Always Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
REPLACE POSITION CONTROL ECU LH Temporarily replace the position control ECU LH with a new or normally functioning one. Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC U0246 is not output. NG: REPLACE REAR POWER SEAT MODULE SWITCH (See «REMOVAL»(ref-349754-S36108262392009120800000) ) OK: END (POSITION CONTROL ECU LH IS DEFECTIVE)

HINT

When DTC U1127, U1128 and U1129 are output simultaneously, perform troubleshooting for "Driver Side Switch Module LIN Communication Malfunction" first (see DRIVER SIDE SWITCH MODULE LIN COMMUNICATION MALFUNCTION ).

Scheme 84

Scheme 84: INSPECTION PROCEDURE

Scheme 85

CLEAR DTC Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC U1127 is not output. NG: Go to step 3 OK: USE SIMULATION METHOD TO CHECK (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-349706-S05264741182009120800000) )
CHECK HARNESS AND CONNECTOR (OUTER MIRROR SWITCH - NO. 1 CONSOLE SWITCH) Disconnect the L6 and L75 switch connectors. Measure the resistance and voltage according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition L6-7 (MPX) - L75-3 (MPX) Always Below 1 ohms L6-7 (MPX) or L75-3 (MPX) - Body ground Always 10 kohms or higher Standard voltage VOLTAGE SPECIFICATION Tester Connection Condition Specified Condition L6-7 (MPX) or L75-3 (MPX) - Body ground Always Below 1 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK NO. 1 CONSOLE SWITCH (BATTERY VOLTAGE AND GROUND) Disconnect the L75 switch connector. Measure the resistance and voltage according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition L75-5 (E) - Body ground Always Below 1 ohms Standard voltage VOLTAGE SPECIFICATION Tester Connection Condition Specified Condition L75-1 (B) - Body ground Always 11 to 14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
REPLACE NO. 1 CONSOLE SWITCH Temporarily replace the No. 1 console switch with a new or normally functioning one. Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC U1127 is not output. NG: REPLACE OUTER MIRROR SWITCH (See «REMOVAL»(ref-349753-S37125702932009120800000) ) OK: END (NO. 1 CONSOLE SWITCH IS DEFECTIVE)

HINT

Scheme 86

Scheme 86: INSPECTION PROCEDURE

Scheme 87

CLEAR DTC Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC U1128 is not output. NG: Go to step 3 OK: USE SIMULATION METHOD TO CHECK (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-349706-S05264741182009120800000) )
CHECK HARNESS AND CONNECTOR (OUTER MIRROR SWITCH - FRONT SEAT CLIMATE CONTROL ECU RH) Disconnect the L6 switch connector. Disconnect the e4 ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition L6-7 (MPX) - e4-13 (LIN) Always Below 1 ohms L6-7 (MPX) or e4-13 (LIN) - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK FRONT SEAT CLIMATE CONTROL ECU RH (BATTERY VOLTAGE AND GROUND) Disconnect the e4 ECU connector. Measure the resistance and voltage according to the value(s) in the table below. Standard voltage VOLTAGE SPECIFICATION Tester Connection Switch Condition Specified Condition e4-1 (IG) - Body ground Engine switch off Below 1 V e4-1 (IG) - Body ground Engine switch on (IG) 11 to 14 V e4-2 (SYSB) - Body ground Always 11 to 14 V Standard resistance SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition e4-11 (VER) - Body ground Always Below 1 ohms e4-12 (GND) - Body ground Always Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
REPLACE FRONT SEAT CLIMATE ECU RH Temporarily replace the front seat climate ECU RH with a new or normally functioning one. Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC U1128 is not output. NG: REPLACE OUTER MIRROR SWITCH (See «REMOVAL»(ref-349753-S37125702932009120800000) ) OK: END (FRONT SEAT CLIMATE CONTROL ECU RH IS DEFECTIVE)

HINT

Scheme 88

Scheme 88: INSPECTION PROCEDURE

Scheme 89

CLEAR DTC Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC U1129 is not output. NG: Go to step 3 OK: USE SIMULATION METHOD TO CHECK (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-349706-S05264741182009120800000) )
CHECK HARNESS AND CONNECTOR (OUTER MIRROR SWITCH - FRONT SEAT CLIMATE CONTROL ECU LH) Disconnect the L6 switch connector. Disconnect the e34 ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition L6-7 (MPX) - e34-13 (LIN) Always Below 1 ohms L6-7 (MPX) or e34-13 (LIN) - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK FRONT SEAT CLIMATE CONTROL ECU LH (BATTERY VOLTAGE AND GROUND) Disconnect the e34 ECU connector. Measure the resistance and voltage according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition e34-12 (GND) - Body ground Always Below 1 ohms Standard voltage VOLTAGE SPECIFICATION Tester Connection Switch Condition Specified Condition e34-1 (IG) - Body ground Engine switch off Below 1 V e34-1 (IG) - Body ground Engine switch on (IG) 11 to 14 V e34-2 (SYSB) - Body ground Always 11 to 14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
REPLACE FRONT SEAT CLIMATE CONTROL ECU LH Temporarily replace the front seat climate ECU LH with a new or normally functioning one. Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC U1129 is not output. NG: REPLACE OUTER MIRROR SWITCH (See «REMOVAL»(ref-349753-S37125702932009120800000) ) OK: END (FRONT SEAT CLIMATE CONTROL ECU LH IS DEFECTIVE)

HINT

Scheme 90

Scheme 90: INSPECTION PROCEDURE

Scheme 91

CLEAR DTC Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC U1130 is not output. NG: Go to step 3 OK: USE SIMULATION METHOD TO CHECK (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-349706-S05264741182009120800000) )
CHECK HARNESS OR CONNECTOR (REAR POWER SEAT SWITCH - SEAT CLIMATE CONTROL ECU RH) Disconnect the r2*1 or S15*2 module switch connector. HINT: *1: except Ottoman *2: for Ottoman Disconnect the f8 ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance except Ottoman: SPECIFIED CONDITION CHART Tester Connection Switch Condition Specified Condition r2-6 (LIN) - f8-13 (LIN) Always Below 1 ohms for Ottoman: SPECIFIED CONDITION CHART Tester Connection Switch Condition Specified Condition S15-3 (LIN) - f8-13 (LIN) Always Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK REAR SEAT CLIMATE CONTROL ECU RH (BATTERY VOLTAGE AND GROUND) Disconnect the f8 ECU connector. Measure the resistance and voltage according to the value(s) in the table below. Standard voltage VOLTAGE SPECIFICATION Tester Connection Switch Condition Specified Condition F8-1 (IG) - Body ground Engine switch off --> Engine switch on (IG) Below 1 V --> 11 to 14 V F8-2 (SYSB) - Body ground Always 11 to 14 V Standard resistance SPECIFIED CONDITION CHART Tester Connection Switch Condition Specified Condition F8-11 (VER) - Body ground Always Below 1 ohms F8-12 (GND) - Body ground Always Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
REPLACE REAR SEAT CLIMATE CONTROL ECU RH Temporarily replace the rear seat climate control ECU RH with a new or normally functioning one. Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC U1130 is not output. NG: REPLACE REAR POWER SEAT MODULE SWITCH (See «REMOVAL»(ref-349754-S36108262392009120800000) ) OK: END (REAR SEAT CLIMATE CONTROL ECU RH IS DEFECTIVE)

HINT

Scheme 92

Scheme 92: INSPECTION PROCEDURE

Scheme 93

CLEAR DTC Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC U1131 is not output. NG: Go to step 3 OK: USE SIMULATION METHOD TO CHECK (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-349706-S05264741182009120800000) )
CHECK HARNESS OR CONNECTOR (REAR POWER SEAT SWITCH - SEAT CLIMATE CONTROL ECU LH) Disconnect the r2*1 or S15*2 module switch connector. HINT: *1: except Ottoman *2: for Ottoman Disconnect the f28 ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance except Ottoman: SPECIFIED CONDITION CHART Tester Connection Switch Condition Specified Condition r2-6 (LIN) - f28-13 (LIN) Always Below 1 ohms r2-6 (LIN) or f28-13 (LIN) - Body ground Always 10 kohms or higher for Ottoman: SPECIFIED CONDITION CHART Tester Connection Switch Condition Specified Condition S15-3 (LIN) - f28-13 (LIN) Always Below 1 ohms S15-3 (LIN) or f28-13 (LIN) - Body ground Always 10 kohms or higher Standard voltage except Ottoman: VOLTAGE SPECIFICATION Tester Connection Switch Condition Specified Condition r2-6 (LIN) - f28-13 (LIN) Always Below 1 V for Ottoman: SPECIFIED CONDITION CHART Tester Connection Switch Condition Specified Condition S15-3 (LIN) - f28-13 (UN) Always Below 1 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK REAR SEAT CLIMATE CONTROL ECU LH (BATTERY VOLTAGE AND GROUND) Disconnect the f28 ECU connector. Measure the resistance and voltage according to the value(s) in the table below. Standard voltage VOLTAGE SPECIFICATION Tester Connection Switch Condition Specified Condition f28-1 (IG) - Body ground Engine switch off --> Engine switch on (IG) Below 1 V --> 11 to 14 V f28-2 (SYSB) - Body ground Always 11 to 14 V Standard voltage VOLTAGE SPECIFICATION Tester Connection Switch Condition Specified Condition f28-12 (GND) - Body ground Always Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
REPLACE REAR SEAT CLIMATE CONTROL ECU LH Temporarily replace the rear seat climate control ECU LH with a new or normally functioning one. Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). OK: DTC U1131 is not output. NG: REPLACE REAR POWER SEAT MODULE SWITCH (See «REMOVAL»(ref-349754-S36108262392009120800000) ) OK: END (REAR SEAT CLIMATE CONTROL ECU LH IS DEFECTIVE)

Scheme 94

Scheme 94: INSPECTION PROCEDURE

Scheme 95

READ VALUE USING TECHSTREAM (LIN COMMUNICATION) Using the Techstream, read the "Data List". Body No. 5: ITEM RANGE REFERENCE Tester Display Measurement Item/Range Normal Condition Diagnostic Note LIN Communication Status of LIN communication/Without or With Without: No connection With: Connection - Curr Comm Rain Sensor Current communication with rain sensor/OK or Stop OK: Connection Stop: No connection - OK: Techstream displays "With" and "OK" NG: Go to step 2 OK: USE SIMULATION METHOD TO CHECK (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-349706-S05264741182009120800000) )
CHECK HARNESS AND CONNECTOR (FRONT LIGHT ECU - RAIN SENSOR) Disconnect the A50 ECU connector. Disconnect the X8 sensor connector. Measure the resistance and voltage according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition A50-9 (LIN) - X8-3 (MPX) Always Below 1 ohms A50-9 (LIN) or X8-3 (MPX) - Body ground Always 10 kohms or higher Standard voltage VOLTAGE SPECIFICATION Tester Connection Condition Specified Condition A50-9 (LIN) or X8-3 (MPX) - Body ground Always Below 1 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: CHECK RAIN SENSOR (BATTERY VOLTAGE AND GROUND)
CHECK RAIN SENSOR (BATTERY VOLTAGE AND GROUND) Disconnect the X8 sensor connector. Measure the resistance and voltage according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition X8-1 (ES) - Body ground Always Below 1 ohms Standard voltage VOLTAGE SPECIFICATION Tester Connection Switch Condition Specified Condition X8-4 (SIG) - Body ground Engine Switch off Below 1 V X8-4 (SIG) - Body ground Engine Switch on (IG) 11 to 14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
REPLACE RAIN SENSOR Temporarily replace the rain sensor with a new or normally functioning one (see «RAIN SENSOR»(ref-349735-S34237239172009120800000) ).
READ VALUE USING TECHSTREAM (LIN COMMUNICATION) Using the Techstream, read the "Data List". Body No. 5: ITEM RANGE REFERENCE Tester Display Measurement Item/Range Normal Condition Diagnostic Note LIN Communication Status of LIN communication/Without or With Without: No connection With: Connection - Curr Comm Rain Sensor Current communication with rain sensor/OK or Stop OK: Connection Stop: No connection - OK: Techstream displays "With" and "OK". NG: REPLACE FRONT LIGHT ECU (FRONT CONTROLLER) OK: END (RAIN SENSOR IS DEFECTIVE)

Scheme 96

Scheme 96: INSPECTION PROCEDURE

Scheme 97

CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - REAR POWER SEAT MODULE SWITCH) Disconnect the L76 amplifier connector. Disconnect the r2*1 or S15*2 module switch connector. HINT: *1: except Ottoman *2: for Ottoman Measure the resistance and voltage according to the value(s) in the table below. Standard resistance except Ottoman: SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition L76-21 (LIN3) - r2-14 (RCLN) Always Below 1 ohms L76-21 (LIN3) or r2-14 (RCLN) - Body ground Always 10 kohms or higher for Ottoman: SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition L76-21 (LIN3) - S15-13 (RCLN) Always Below 1 ohms L76-21 (LIN3) or S15-13 (RCLN) - Body ground Always 10 kohms or higher Standard voltage except Ottoman: VOLTAGE SPECIFICATION Tester Connection Condition Specified Condition L76-21 (LIN3) or r2-14 (RCLN) - Body ground Always Below 1 V for Ottoman: SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition L76-21 (LIN3) or S15-13 (RCLN) - Body ground Always Below 1 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK REAR POWER SEAT MODULE SWITCH (BATTERY VOLTAGE AND GROUND) Disconnect the r2*1 or S15*2 module switch connector. HINT: *1: except Ottoman *2: for Ottoman Measure the resistance and voltage according to the value(s) in the table below. Standard resistance except Ottoman: SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition r2-3 (E) - Body ground Always Below 1 ohms for Ottoman: SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition S15-5 (E) - Body ground Always Below 1 ohms Standard voltage except Ottoman: VOLTAGE SPECIFICATION Tester Connection Condition Specified Condition r2-11 (B) - Body ground Always 11 to 14 V for Ottoman: SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition S15-6 (B) - Body ground Always 11 to 14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
REPLACE REAR POWER SEAT MODULE SWITCH (OPERATION) Temporarily replace the rear power seat module switch with a new or normally functioning one (see «REMOVAL»(ref-349754-S36108262392009120800000) ). Check the rear air conditioning function is normal. OK: Rear air conditioning function is normal. NG: REPLACE AIR CONDITIONING AMPLIFIER OK: END (REAR POWER SEAT MODULE SWITCH IS DEFECTIVE)

Scheme 98

Scheme 98: INSPECTION PROCEDURE

CLEAR DTC Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). Result: RESULT REFERENCE Result Proceed to DTC U1127, U1128 and U1129 are output A DTC U1127, U1128 or U1129 is output B B: No DTC is output C C: GO TO «DTC CHART»(ref-349747-S25300269312009120800000) A: USE SIMULATION METHOD TO CHECK (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-349706-S05264741182009120800000) )
CHECK HARNESS AND CONNECTOR (OUTER MIRROR SWITCH - NO. 1 CONSOLE SWITCH) Disconnect the L6 and L75 switch connectors. Measure the resistance and voltage according to the value(s) in the table below. Standard resistance SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition L6-7 (MPX) - L75-3 (MPX) Always Below 1 ohms L6-7 (MPX) or L75-3 (MPX) - Body ground Always 10 kohms or higher Standard voltage VOLTAGE SPECIFICATION Tester Connection Condition Specified Condition L6-7 (MPX) or L75-3 (MPX) - Body ground Always Below 1 V NG: Go to step 4 OK: REPLACE OUTER MIRROR SWITCH (See «REMOVAL»(ref-349753-S37125702932009120800000) )
CLEAR DTC Reconnect the L6 switch connector. Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Disconnect the L75 switch connector. Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). Result: RESULT REFERENCE Result Proceed to DTC U1127, U1128 and U1129 are output A DTC U1127 is output B B: REPLACE NO. 1 CONSOLE SWITCH A: Go to next step
CLEAR DTC Reconnect the L75 switch connector. Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Disconnect the e4 ECU connector. Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). Result: RESULT REFERENCE Result Proceed to DTC U1127, U1128 and U1129 are output A DTC U1128 is output B B: REPLACE FRONT SEAT CLIMATE CONTROL ECU RH A: Go to next step
CLEAR DTC Reconnect the e4 ECU connector. Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Disconnect the e34 ECU connector. Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). Result: RESULT REFERENCE Result Proceed to DTC U1127, U1128 and U1129 are output A DTC U1129 is output B B: REPLACE FRONT SEAT CLIMATE CONTROL ECU LH A: REPAIR OR REPLACE HARNESS OR CONNECTOR

Scheme 99

Scheme 99: INSPECTION PROCEDURE

CLEAR DTC Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Check for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). Result: RESULT REFERENCE Result Proceed to DTC U0211, U0246, U1130* and U1131* are output A DTC U0211, U0246, U1130* or U1131* is output B No DTC is output C HINT: *: w/ Rear Climate Control Seat System B: GO TO «DTC CHART»(ref-349747-S25300269312009120800000) C: USE SIMULATION METHOD TO CHECK (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-349706-S05264741182009120800000) ) A: Go to next step
CHECK HARNESS AND CONNECTOR (REAR POWER SEAT MODULE SWITCH - POSITION CONTROL ECU LH) Disconnect the r2*1 or S15*2 module switch connectors. HINT: *1: except Ottoman *2: for Ottoman Disconnect the f25 ECU connector. Measure the resistance and voltage according to the value(s) in the table below. Standard resistance except Ottoman: SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition r2-6 (LIN) - f25-7 (LIN) Always Below 1 ohms r2-6 (LIN) or f25-7 (LIN) - Body ground Always 10 kohms or higher for Ottoman: SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition S15-3 (LIN) - f25-7 (LIN) Always Below 1 ohms S15-3 (LIN) or f25-7 (LIN) - Body ground Always 10 kohms or higher Standard voltage except Ottoman: VOLTAGE SPECIFICATION Tester Connection Condition Specified Condition r2-6 (LIN) or f25-7 (LIN) - Body ground Always Below 1 V for Ottoman: SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition S15-3 (LIN) or f25-7 (LIN) - Body ground Always Below 1 V NG: Go to step 4 OK: REPLACE REAR POWER SEAT MODULE SWITCH (See «REMOVAL»(ref-349754-S36108262392009120800000) )
CLEAR DTC Reconnect the r2*1 or S15*2 module switch connectors. HINT: *1: except Ottoman *2: for Ottoman Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Disconnect the f25 ECU connector. Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). Result: RESULT REFERENCE Result Proceed to DTC U0211, U0246, U1130* and U1131* are output A DTC U0211 is output B HINT: *: w/ Rear Climate Control Seat System B: REPLACE POSITION CONTROL ECU RH A: Go to next step
CLEAR DTC Reconnect the f25 ECU connector. Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Disconnect the f25 ECU connector. Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). Result: RESULT REFERENCE Result Proceed to DTC U0211 and U0246 are output C DTC U0211, U0246, U1130* and U1131* are output A DTC U0246 is output B HINT: *: w/ Rear Climate Control Seat System B: REPLACE POSITION CONTROL ECU LH C: REPAIR OR REPLACE HARNESS OR CONNECTOR A: Go to next step
CLEAR DTC Reconnect the f25 ECU connector. Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Disconnect the f8 ECU connector. Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). Result: RESULT REFERENCE Result Proceed to DTC U0211, U0246, U1130* and U1131* are output A DTC U1130* is output B HINT: *: w/ Rear Climate Control Seat System B: REPLACE REAR SEAT CLIMATE CONTROL ECU RH A: Go to next step
CLEAR DTC Reconnect the f8 ECU connector. Clear the DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ).
CHECK FOR DTC Disconnect the f28 ECU connector. Recheck for DTC (see «DTC CHECK/CLEAR»(ref-349747-S34685845232009120800000) ). Result: RESULT REFERENCE Result Proceed to DTC U0211, U0246, U1130* and U1131* are output A DTC U1131* is output B HINT: *: w/ Rear Climate Control Seat System B: REPLACE REAR SEAT CLIMATE CONTROL ECU LH A: REPAIR OR REPLACE HARNESS OR CONNECTOR

Multiplex Communication: Diagnosis Lexus LS IV

HOW TO PROCEED WITH TROUBLESHOOTING

PROBLEM SYMPTOMS TABLE

Scheme 30

Scheme 31

Scheme 32

Scheme 33

Scheme 34

Scheme 35

Scheme 36

Scheme 37

Scheme 38

Scheme 39

Scheme 40

Scheme 41

Scheme 42

Scheme 43

Scheme 44

Scheme 45

Scheme 46

Scheme 47

Scheme 48

Scheme 49

Scheme 50

Scheme 51

Scheme 52

Scheme 53

Scheme 54

Scheme 55

Scheme 56

DTC CHECK/CLEAR

DATA LIST/ACTIVE TEST

DIAGNOSTIC TROUBLE CODE CHART

INSPECTION PROCEDURE

Scheme 57

Scheme 58

Scheme 59

Scheme 60

Scheme 61

Scheme 62

Scheme 63

Scheme 64

Scheme 65

Scheme 66

Scheme 67

Scheme 68

Scheme 69

Scheme 70

Scheme 71

Scheme 72

Scheme 73

Scheme 74

Scheme 75

Scheme 76

Scheme 77

Scheme 78

Scheme 79

Scheme 80

Scheme 81

Scheme 82

Scheme 83

Scheme 84

Scheme 85

Scheme 86

Scheme 87

Scheme 88

Scheme 89

Scheme 90

Scheme 91

Scheme 92

Scheme 93

Scheme 94

Scheme 95

Scheme 96

Scheme 97

Scheme 98

Scheme 99

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