LIN Communication System (Diagnostic Codes): Diagnosis Lexus ES XV60

INSPECTION PROCEDURE

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure. If the main body ECU (multiplex network body ECU) is replaced, refer to Registration. Refer to REGISTRATION [06/2012 - ]

Scheme 134

1. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Remove the instrument panel junction block assembly. Refer to «REMOVAL [06/2012 - ]»(ref-598640-S21213941222014021400000) . Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly. Measure the resistance according to the value(s) in the table below. HINT: This inspection is to check the LIN line in the instrument panel junction block assembly that connects the wire harness to the built-in main body ECU (multiplex network body ECU). Standard Resistance Tester Connection Condition Specified Condition 3B-30 (LIN2) - MB-16 (LIN2) Always Below 1 ohms TEXT IN ILLUSTRATION *a Component without harness connected (Instrument Panel Junction Block Assembly) *b Component without harness connected (Instrument Panel Junction Block Assembly) NG --> See step 6 OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - MULTIPLEX NETWORK MASTER SWITCH) Disconnect the M4 multiplex network master switch assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 3B-30 (LIN2) - M4-17 (LIN1) Always Below 1 ohms 3B-30 (LIN2) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK MASTER SWITCH - BATTERY, BODY GROUND) Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition M4-11 (B) - M4-12 (GND) Always 11 to 14 V Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition M4-12 (GND) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY Replace the multiplex network master switch assembly. Refer to «REMOVAL [06/2012 - ]»(ref-598640-S21213941222014021400000) . NEXT: Go to next step
5. CHECK DTC OUTPUT Clear the DTCs. Refer to «DTC CHECK / CLEAR [06/2012 - ]»(ref-598669-S03554316722014021400000) . Recheck for DTCs. OK DTC B1206 is not output. NG --> See step 7 OK --> END (MULTIPLEX NETWORK MASTER SWITCH WAS DEFECTIVE)
6. REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to «REMOVAL [06/2012 - ]»(ref-598640-S21213941222014021400000)
7. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL [06/2012 - ]»(ref-598640-S21213941222014021400000)

Note. Before starting repair, check that the power source system of the accessory ECU is not malfunctioning. If the main body ECU (multiplex network body ECU) is replaced, refer to Registration. Refer to REGISTRATION [06/2012 - ]

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure. If the main body ECU (multiplex network body ECU) is replaced, refer to Registration. Refer to REGISTRATION [06/2012 - ] When the sliding roof ECU (sliding roof drive gear sub-assembly) is replaced or removed and reinstalled, it requires initialization. Refer to INITIALIZATION [06/2012 - ] .

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure. If the main body ECU (multiplex network body ECU) is replaced, refer to Registration. Refer to REGISTRATION [06/2012 - ] When a power window regulator motor assembly is replaced or removed and reinstalled, it requires initialization. Refer to INITIALIZATION [06/2012 - ] .

Scheme 135

1. CHECK DTC OUTPUT Clear the DTCs. Refer to «DTC CHECK / CLEAR [06/2012 - ]»(ref-598669-S03554316722014021400000) . Recheck for DTCs. Result Result Proceed to Only DTC B2321 is output. A DTC B1206 and B2321 are output simultaneously. B HINT: When DTC B1206 and B2321 are output simultaneously, perform troubleshooting for DTC B1206 first. B --> See step 9 A: Go to next step
2. CHECK HARNESS AND CONNECTOR (MASTER SWITCH - POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Driver Door)) Disconnect the M4 multiplex network master switch connector. Disconnect the M8 power window regulator motor (for driver door) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition M4-16 (LIN2) - M8-9 (LIN) Always Below 1 ohms M4-16 (LIN2) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. INSPECT MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY Remove the multiplex network master switch assembly. Refer to «REMOVAL [06/2012 - ]»(ref-598693-S26576611572014021400000) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 16 (LIN2) - 17 (LIN1) Always Below 1 ohms 16 (LIN2) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *a Component without harness connected (Multiplex Network Master Switch Assembly) NG --> See step 7 OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Driver Door) - BATTERY, BODY GROUND) Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition M8-2 (B) - Body ground Always 11 to 14 V Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition M8-1 (GND) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Driver Door) Replace the power window regulator motor assembly (for driver door). Refer to «REMOVAL [06/2012 - ]»(ref-598693-S32047285602014021400000) . NEXT: Go to next step
6. CHECK DTC OUTPUT Clear the DTCs. Refer to «DTC CHECK / CLEAR [06/2012 - ]»(ref-598669-S03554316722014021400000) . Check for DTCs. OK DTC B2321 is not output. NG --> See step 8 OK --> END (POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Driver Door) WAS DEFECTIVE)
7. REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY. Refer to «REMOVAL [06/2012 - ]»(ref-598693-S26576611572014021400000)
8. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL [06/2012 - ]»(ref-598640-S21213941222014021400000)
9. GO TO DTC B1206. Refer to «DTC B1206: P/W Master Switch Communication Stop»(ref-598671-S34050125832014021400000)

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure. If the main body ECU (multiplex network body ECU) is replaced, refer to Registration. Refer to REGISTRATION [06/2012 - ] When a power window regulator motor assembly is replaced or removed and reinstalled, it requires initialization. Refer to INITIALIZATION [06/2012 - ] .

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure. If the main body ECU (multiplex network body ECU) is replaced, refer to Registration. Refer to REGISTRATION [06/2012 - ] When a power window regulator motor assembly is replaced or removed and reinstalled, it requires initialization. Refer to INITIALIZATION [06/2012 - ] .

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure. If the main body ECU (multiplex network body ECU) is replaced, refer to Registration. Refer to REGISTRATION [06/2012 - ] When a power window regulator motor assembly is replaced or removed and reinstalled, it requires initialization. Refer to INITIALIZATION [06/2012 - ] .

Scheme 136

1. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Remove the instrument panel junction block assembly. Refer to «REMOVAL [06/2012 - ]»(ref-598640-S21213941222014021400000) . Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly. Measure the resistance according to the value(s) in the table below. HINT: This inspection is to check the LIN line in the instrument panel junction block assembly that connects the wire harness to the built-in main body ECU (multiplex network body ECU). Standard Resistance Tester Connection Condition Specified Condition 3C-26 (LIN2) - MB-16 (LIN2) Always Below 1 ohms TEXT IN ILLUSTRATION *a Component without harness connected (Instrument Panel Junction Block Assembly) *b Component without harness connected (Instrument Panel Junction Block Assembly) NG --> See step 6 OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear LH Door)) Disconnect the O2 power window regulator motor assembly (for rear LH door) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 3C-26 (LIN2) - O2-9 (LIN) Always Below 1 ohms 3C-26 (LIN2) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear LH Door) - BATTERY, BODY GROUND) Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition O2-2 (B) - Body ground Always 11 to 14 V Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition O2-1 (GND) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear LH Door) Replace the power window regulator motor assembly (for rear LH door). Refer to «REMOVAL [06/2012 - ]»(ref-598693-S39681092412014021400000) . NEXT: Go to next step
5. CHECK DTC OUTPUT Clear the DTCs. Refer to «DTC CHECK / CLEAR [06/2012 - ]»(ref-598669-S03554316722014021400000) . Check for DTCs. OK DTC B2324 is not output. NG --> See step 7 OK --> END (POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear LH Door) WAS DEFECTIVE)
6. REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to «REMOVAL [06/2012 - ]»(ref-598640-S21213941222014021400000)
7. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL [06/2012 - ]»(ref-598640-S21213941222014021400000)

Note. When the sliding roof ECU (sliding roof drive gear sub-assembly) is replaced or removed and reinstalled, it requires initialization. Refer to INITIALIZATION [06/2012 - ] . If the main body ECU (multiplex network body ECU) is replaced, refer to Registration. Refer to REGISTRATION [06/2012 - ] When a power window regulator motor assembly is replaced or removed and reinstalled, it requires initialization. Refer to INITIALIZATION [06/2012 - ] .

Scheme 137

1. CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Driver Door) - MASTER SWITCH) Disconnect the M4 multiplex network master switch connector. Disconnect the M8 power window regulator motor (for driver door) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition M4-16 (LIN2) - M8-9 (LIN) Always Below 1 ohms M4-16 (LIN2) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
2. INSPECT MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY Remove the multiplex network master switch assembly. Refer to «REMOVAL [06/2012 - ]»(ref-598693-S26576611572014021400000) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 16 (LIN2) - 17 (LIN1) Always Below 1 ohms 16 (LIN2) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *a Component without harness connected (Multiplex Network Master Switch Assembly) NG --> See step 14 OK: Go to next step
3. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Remove the instrument panel junction block assembly. Refer to «REMOVAL [06/2012 - ]»(ref-598640-S21213941222014021400000) . Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly. Measure the resistance according to the value(s) in the table below. HINT: This inspection is to check the LIN line in the instrument panel junction block assembly that connects the wire harness to the built-in main body ECU (multiplex network body ECU). Standard Resistance Tester Connection Condition Specified Condition 3C-26 (LIN2) - MB-16 (LIN2) Always Below 1 ohms 3B-30 (LIN2) - MB-16 (LIN2) Always Below 1 ohms TEXT IN ILLUSTRATION *a Component without harness connected (Instrument Panel Junction Block Assembly) *b Component without harness connected (Instrument Panel Junction Block Assembly) *c Component without harness connected (Instrument Panel Junction Block Assembly) - - NG --> See step 11 OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (INSTRUMENT JUNCTION BLOCK - EACH ECU) Disconnect the L9 power window regulator motor assembly (for front passenger door) connector. Disconnect the M4 multiplex network master switch assembly connector. Disconnect the T4 sliding roof ECU (sliding roof drive gear sub-assembly) connector. Disconnect the N2 power window regulator motor assembly (for rear RH door) connector. Disconnect the O2 power window regulator motor assembly (for rear LH door) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 3C-26 (LIN2) - O2-9 (LIN) Always Below 1 ohms 3B-30 (LIN2) - N2-9 (LIN) Always Below 1 ohms 3B-30 (LIN2) - M4-17 (LIN1) Always Below 1 ohms 3B-30 (LIN2) - L9-9 (LIN) Always Below 1 ohms 3B-30 (LIN2) - T4-11 (MPX1) Always Below 1 ohms 3C-26 (LIN2) - Body ground Always 10 kohms or higher 3B-30 (LIN2) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. CHECK DTC OUTPUT (POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear LH Door)) Reconnect the M4 multiplex network master switch assembly connector. Reconnect the 3B and 3C instrument panel junction block assembly connector. Reconnect the T4 sliding roof ECU (sliding roof drive gear sub-assembly) connector. Reconnect the N2 power window regulator motor assembly (for rear RH door) connector. Reconnect the M8 power window regulator motor assembly (for driver door) connector. Reconnect the L9 power window regulator motor assembly (for front passenger door) connector. Clear the DTCs. Refer to «DTC CHECK / CLEAR [06/2012 - ]»(ref-598669-S03554316722014021400000) . After 10 seconds have elapsed, check if the trouble occurs again. Check for DTCs again. Result Result Proceed to DTC B2325 is output A DTC B2325 is not output B B --> See step 12 A: Go to next step
6. CHECK DTC OUTPUT (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY) Reconnect the O2 power window regulator motor assembly (for rear LH door) connector. Disconnect the M4 multiplex network master switch assembly connector. Clear the DTCs. Refer to «DTC CHECK / CLEAR [06/2012 - ]»(ref-598669-S03554316722014021400000) . After 10 seconds have elapsed, check if the trouble occurs again. Check for DTCs again. Result Result Proceed to DTC B2325 is output A DTC B2325 is not output B B --> See step 14 A: Go to next step
7. CHECK DTC OUTPUT (POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear RH Door)) Reconnect the M4 multiplex network master switch assembly connector. Disconnect the N2 power window regulator motor assembly (for rear RH door) connector. Clear the DTCs. Refer to «DTC CHECK / CLEAR [06/2012 - ]»(ref-598669-S03554316722014021400000) . After 10 seconds have elapsed, check if the trouble occurs again. Check for DTCs again. Result Result Proceed to DTC B2325 is output A DTC B2325 is not output B B --> See step 15 A: Go to next step
8. CHECK DTC OUTPUT (POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Driver Door)) Reconnect the N2 power window regulator motor assembly (for rear RH door) connector. Disconnect the M8 power window regulator motor assembly (for driver door) connector. Clear the DTCs. Refer to «DTC CHECK / CLEAR [06/2012 - ]»(ref-598669-S03554316722014021400000) . After 10 seconds have elapsed, check if the trouble occurs again. Check for DTCs again. Result Result Proceed to DTC B2325 is output A DTC B2325 is not output B B --> See step 16 A: Go to next step
9. CHECK DTC OUTPUT (POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Front Passenger Door)) Reconnect the M8 power window regulator motor assembly (for driver door) connector. Disconnect the L9 power window regulator motor assembly (for front passenger door) connector. Clear the DTCs. Refer to «DTC CHECK / CLEAR [06/2012 - ]»(ref-598669-S03554316722014021400000) . After 10 seconds have elapsed, check if the trouble occurs again. Check for DTCs again. Result Result Proceed to DTC B2325 is output A DTC B2325 is not output B B --> See step 17 A: Go to next step
10. CHECK DTC OUTPUT (SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY)) Reconnect the L9 power window regulator motor assembly (for front passenger door) connector. Disconnect the T4 sliding roof ECU (sliding roof drive gear sub-assembly) connector. Clear the DTCs. Refer to «DTC CHECK / CLEAR [06/2012 - ]»(ref-598669-S03554316722014021400000) . After 10 seconds have elapsed, check if the trouble occurs again. Check for DTCs again. Result Result Proceed to DTC B2325 is output A DTC B2325 is not output (for Standard) B DTC B2325 is not output (for Glass Roof) C B --> See step 13 C --> See step 19 A --> See step 18
11. REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to «REMOVAL [06/2012 - ]»(ref-598640-S21213941222014021400000)
12. REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear LH Door). Refer to «REMOVAL [06/2012 - ]»(ref-598693-S39681092412014021400000)
13. REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY). Refer to «REMOVAL [06/2012 - ]»(ref-598692-S32707791212014021400000)
14. REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY. Refer to «REMOVAL [06/2012 - ]»(ref-598693-S26576611572014021400000)
15. REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear RH Door). Refer to «REMOVAL [06/2012 - ]»(ref-598693-S39681092412014021400000)
16. REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Driver Door). Refer to «REMOVAL [06/2012 - ]»(ref-598693-S32047285602014021400000)
17. REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Front Passenger Door). Refer to «REMOVAL [06/2012 - ]»(ref-598693-S32047285602014021400000)
18. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL [06/2012 - ]»(ref-598640-S21213941222014021400000)
19. REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY). Refer to «REMOVAL [06/2012 - ]»(ref-598692-S04128187732014021400000)

Note. If the certification ECU (smart key ECU assembly) is replaced, register the keys. Refer to REGISTRATION [06/2012 - ] . If the steering lock ECU (steering lock actuator assembly) is replaced, register the ECU code. Refer to REGISTRATION [06/2012 - ] . If the ID code box (immobilizer code ECU) is replaced, register the ECU code and ECU communication ID. Refer to REGISTRATION [06/2012 - ] . When using the Techstream with the vehicle engine switch off, connect the Techstream to the vehicle and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Access. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure. If the certification ECU (smart key ECU assembly) is replaced, register the keys. Refer to REGISTRATION [06/2012 - ] . If the steering lock ECU (steering lock actuator assembly) is replaced, register the ECU code. Refer to REGISTRATION [06/2012 - ] . When using the Techstream with the vehicle engine switch off, connect the Techstream to the vehicle and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Access. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure. If the certification ECU (smart key ECU assembly) is replaced, register the keys. Refer to REGISTRATION [06/2012 - ] . If the ID code box (immobilizer code ECU) is replaced, register the ECU code and ECU communication ID. Refer to REGISTRATION [06/2012 - ] . When using the Techstream with the vehicle engine switch off, connect the Techstream to the vehicle and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Access. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.

Note. When using the Techstream with the vehicle engine switch off, connect the Techstream to the vehicle and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Access. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle. If the certification ECU (smart key ECU assembly) is replaced, register the keys. Refer to REGISTRATION [06/2012 - ] .