Lexus Link System (Diagnostic Codes): Overview Lexus LX J200

DESCRIPTION

This DTC is stored when the LEXUS Link service cannot be received.

This DTC is stored if the telephone ECU assembly has a writing error while downloading information from the LEXUS Link call center.

These DTCs are stored when an error occurs in the CPU of the telephone ECU assembly.

Note. Current DTC Historic DTC only Disconnect and reconnect battery. Check for current DTCs. If DTC returns, replace telephone ECU assembly and mayday battery (backup battery). If this is only a historic DTC, the system has already recovered normally and should be operating normally. Clear historic DTCs.

These DTCs are stored when a communication error occurs between the CPU and each interface in the telephone ECU assembly.

Note. Current DTC Historic DTC only Disconnect and reconnect battery. Check for current DTCs. If DTC returns, replace telephone ECU assembly and mayday battery (backup battery). If this is only a historic DTC, the system has already recovered normally and should be operating normally. Clear historic DTCs.

This DTC is stored when a communication error occurs between the CPU and each interface in the telephone ECU assembly.

Note. Current DTC Historic DTC only Disconnect and reconnect battery. Wait 5 minutes with engine switch on (IG). Check DTCs. If DTC is not output, place test phone call. If DTC 2-6 is output, replace telephone ECU assembly and mayday battery (backup battery). If this is only a historic DTC, the system has already recovered normally and should be operating normally. Place a test call to verify functionality and then clear historic DTCs.

This DTC is stored when one of the following occurs: 1) the telephone ECU assembly is malfunctioning; 2) the telephone antenna (GPS antenna) is malfunctioning; or 3) the antenna cord is malfunctioning.

Scheme 141

Scheme 142

1. INSPECT ANTENNA CORD SUB-ASSEMBLY Disconnect the antenna cord connector from the ECU. Disconnect the antenna cord connector from the telephone antenna. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A-1 (SIGNAL) - 1 Always Below 1 ohms A-1 (SIGNAL) - Body ground Always 10 kohms or higher NG --> REPLACE ANTENNA CORD SUB-ASSEMBLY THEN CLEAR HISTORIC DTC OK: Go to next step
2. CHECK TELEPHONE ECU ASSEMBLY (OPERATION) Temporarily replace the telephone ECU assembly and mayday battery with a new one. Refer to «REMOVAL»(ref-385269-S40035007542011021400000) . Check for the current DTC again. Refer to «DTC CHECK / CLEAR»(ref-385285-S27742832902011021400000) . OK System operates normally (red LED off). NG Current DTC 3-1 is output. NG --> REPLACE TELEPHONE ANTENNA ASSEMBLY (GPS ANTENNA) THEN CLEAR HISTORIC DTC OK --> See step 3
3. END (TELEPHONE ECU ASSEMBLY IS FAULTY; PERFORM REGISTRATION). Refer to «REGISTRATION»(ref-385285-S20978396562011021400000)

This DTC is stored when one of the following occurs: 1) the telephone ECU assembly is malfunctioning; 2) the telephone antenna (cellular phone antenna) is malfunctioning; or 3) the antenna cord is malfunctioning.

Scheme 143

Scheme 144

1. INSPECT ANTENNA CORD SUB-ASSEMBLY Disconnect the antenna cord connector from the ECU. Disconnect the antenna cord connector from the telephone antenna. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition B-1 (SIGNAL) - 1 Always Below 1 ohms Either terminal 1 - Body ground Always 10 kohms or higher NG --> REPLACE ANTENNA CORD SUB-ASSEMBLY THEN CLEAR HISTORIC DTC OK: Go to next step
2. CHECK TELEPHONE ECU ASSEMBLY (OPERATION) Temporarily replace the telephone ECU assembly and mayday battery with a new one. Refer to «REMOVAL»(ref-385269-S40035007542011021400000) . Check for DTC again. Refer to «DTC CHECK / CLEAR»(ref-385285-S27742832902011021400000) . OK System operates normally (red LED off). NG Current DTC 3-2 is output. NG --> REPLACE TELEPHONE ANTENNA ASSEMBLY THEN CLEAR HISTORIC DTC OK --> See step 3
3. END (TELEPHONE ECU ASSEMBLY IS FAULTY; PERFORM REGISTRATION). Refer to «REGISTRATION»(ref-385285-S20978396562011021400000)

This DTC is stored when the telephone antenna (GPS antenna) cannot receive information on the current location of the vehicle from the GPS satellite while driving for a short distance.

This DTC is stored when one of the following occurs: 1) the telephone ECU assembly is malfunctioning; 2) the red LED is malfunctioning; or 3) the wire harness between the telephone ECU assembly and map light (mayday switch) is open or shorted.

Scheme 145

Scheme 146

1. CHECK HARNESS AND CONNECTOR (TELEPHONE ECU ASSEMBLY - MAP LIGHT ASSEMBLY) Disconnect the P3 ECU connector. Disconnect the R12 map light connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition P3-4 (IND1) - R12-4 (IND1) Always Below 1 ohms P3-4 (IND1) or R12-4 (IND1) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR THEN CLEAR HISTORIC DTC OK: Go to next step
2. CHECK MAP LIGHT ASSEMBLY (RED LED OPERATION) Temporarily replace the map light with a new or normally functioning one. Refer to «REMOVAL»(ref-385288-S17507727852011021400000) . Check that the system operates normally. OK Red LED operates normally. NG --> See step 3 OK --> See step 5
3. REPLACE TELEPHONE ECU ASSEMBLY TOGETHER WITH MAYDAY BATTERY NEXT --> See step 4
4. PERFORM REGISTRATION. Refer to «REGISTRATION»(ref-385285-S20978396562011021400000)
5. END (MAP LIGHT (RED LED) IS FAULTY; CLEAR HISTORIC DTC). Refer to «DTC CHECK / CLEAR»(ref-385285-S27742832902011021400000)

This DTC is stored when one of the following occurs: 1) the telephone ECU assembly is malfunctioning; 2) the green LED is malfunctioning; or 3) the wire harness between the telephone ECU assembly and map light assembly (mayday switch) is open or shorted.

Scheme 147

Scheme 148

1. CHECK HARNESS AND CONNECTOR (TELEPHONE ECU ASSEMBLY - MAP LIGHT ASSEMBLY) Disconnect the P3 ECU connector. Disconnect the R12 map light connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition P3-11 (IND2) - R12-5 (IND2) Always Below 1 ohms P3-11 (IND2) or R12-5 (IND2) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR THEN CLEAR HISTORIC DTC OK: Go to next step
2. CHECK MAP LIGHT ASSEMBLY (GREEN LED OPERATION) Temporarily replace the map light with a new or normally functioning one. Refer to «REMOVAL»(ref-385288-S17507727852011021400000) . Check that the system operates normally. OK Green LED operates normally. NG --> See step 3 OK --> See step 5
3. REPLACE TELEPHONE ECU ASSEMBLY TOGETHER WITH MAYDAY BATTERY NEXT --> See step 4
4. PERFORM REGISTRATION. Refer to «REGISTRATION»(ref-385285-S20978396562011021400000)
5. END (MAP LIGHT (GREEN LED) IS FAULTY; CLEAR HISTORIC DTC). Refer to «DTC CHECK / CLEAR»(ref-385285-S27742832902011021400000)

This DTC is stored when one of the following occurs: 1) the telephone ECU assembly is malfunctioning; 2) the map light assembly is malfunctioning; 3) the microphone amplifier is malfunctioning; or 4) the wire harness between the telephone ECU assembly and map light is open or shorted.

Scheme 149

Scheme 150

Scheme 151

1. CHECK NAVIGATION SYSTEM Start the navigation system and check that the voice recognition microphone function operates normally. RESULT Result Proceed to Microphone function is normal A Microphone function is malfunctioning B B --> See step 7 A: Go to next step
2. CHECK HARNESS AND CONNECTOR (TELEPHONE ECU ASSEMBLY - MAP LIGHT ASSEMBLY) Disconnect the P2 ECU connector. Disconnect the R7 map light connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition P2-7 (MCVD) - R7-22 (ACC) Always Below 1 ohms P2-7 (MCVD) or R7-22 (ACC) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR THEN CLEAR HISTORIC DTC OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (MAP LIGHT ASSEMBLY - BODY GROUND) Disconnect the R7 map light connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition R7-16 (GND9) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR THEN CLEAR HISTORIC DTC OK: Go to next step
4. CHECK MAP LIGHT ASSEMBLY (OPERATION) Temporarily replace the map light with a new or normally functioning one. Refer to «REMOVAL»(ref-385288-S17507727852011021400000) . Check if DTC 4-3 is output. OK DTC 4-3 is not output. NG --> See step 5 OK --> See step 8
5. REPLACE TELEPHONE ECU ASSEMBLY TOGETHER WITH MAYDAY BATTERY NEXT --> See step 6
6. PERFORM REGISTRATION. Refer to «REGISTRATION»(ref-385285-S20978396562011021400000)
7. GO TO NAVIGATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-385263-S37676761772011021400000)
8. END (MAP LIGHT IS FAULTY; CLEAR HISTORIC DTC). Refer to «DTC CHECK / CLEAR»(ref-385285-S27742832902011021400000)

This DTC is stored when either of the following occurs: 1) the telephone ECU assembly is malfunctioning; or 2) the mayday switch on the map light assembly is malfunctioning.

Scheme 152

1. CHECK MAP LIGHT ASSEMBLY (MAYDAY SWITCH) Check that the mayday switch is not stuck by pressing the switch several times. Check for DTC again. Refer to «DTC CHECK / CLEAR»(ref-385285-S27742832902011021400000) . OK Current DTC 4-4 is not output. NG --> See step 2 OK --> See step 5
2. INSPECT MAP LIGHT ASSEMBLY (MAYDAY SWITCH) Remove the map light. Refer to «REMOVAL»(ref-385288-S17507727852011021400000) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 31 (SIG2) - 32 (GND3) SERVICES button is pressed 305 to 313 ohms 31 (SIG2) - 32 (GND3) Phone button is pressed 812 to 831 ohms 31 (SIG2) - 32 (GND3) PTT button is pressed 1811 to 1848 ohms NG --> REPLACE MAP LIGHT ASSEMBLY (MAYDAY SWITCH) THEN CLEAR HISTORIC DTC OK: Go to next step
3. REPLACE TELEPHONE ECU ASSEMBLY TOGETHER WITH MAYDAY BATTERY NEXT --> See step 4
4. PERFORM REGISTRATION. Refer to «REGISTRATION»(ref-385285-S20978396562011021400000)
5. CLEAR HISTORIC DTC. Refer to «DTC CHECK / CLEAR»(ref-385285-S27742832902011021400000)

This DTC is stored when either of the following occurs: 1) the telephone ECU assembly is malfunctioning; or 2) the mayday switch on the map light assembly is malfunctioning.

Scheme 153

1. CHECK MAP LIGHT ASSEMBLY (MAYDAY SWITCH) Check that the mayday switch is not stuck by pressing the switch several times. Check for DTC again. Refer to «DTC CHECK / CLEAR»(ref-385285-S27742832902011021400000) . OK Current DTC 4-5 is not output. NG --> See step 2 OK --> See step 5
2. INSPECT MAP LIGHT ASSEMBLY (MAYDAY SWITCH) Remove the map light. Refer to «REMOVAL»(ref-385288-S17507727852011021400000) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 30 (SIG1) - 32 (GND3) Emergency button is pressed 305 to 313 ohms 30 (SIG1) - 32 (GND3) VOL+ button is pressed 812 to 831 ohms 30 (SIG1) - 32 (GND3) VOL- button is pressed 1811 to 1848 ohms NG --> REPLACE MAP LIGHT ASSEMBLY (MAYDAY SWITCH) THEN CLEAR HISTORIC DTC OK: Go to next step
3. REPLACE TELEPHONE ECU ASSEMBLY TOGETHER WITH MAYDAY BATTERY NEXT --> See step 4
4. PERFORM REGISTRATION. Refer to «REGISTRATION»(ref-385285-S20978396562011021400000)
5. CLEAR HISTORIC DTC. Refer to «DTC CHECK / CLEAR»(ref-385285-S27742832902011021400000)

This DTC is stored when one of the following occurs: 1) the telephone ECU assembly is malfunctioning; 2) the mayday switch on the map light assembly is malfunctioning; or 3) the wire harness between the telephone ECU assembly and the map light is open.

Scheme 154

Scheme 155

1. CHECK HARNESS AND CONNECTOR (TELEPHONE ECU ASSEMBLY - MAP LIGHT ASSEMBLY) Disconnect the P3 ECU connector. Disconnect the R7 map light connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition P3-13 (SIG2) - R7-31 (SIG2) Always Below 1 ohms P3-12 (SIG-) - R7-32 (GND3) Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR THEN CLEAR HISTORIC DTC OK: Go to next step
2. INSPECT MAP LIGHT ASSEMBLY (MAYDAY SWITCH) Remove the map light. Refer to «REMOVAL»(ref-385288-S17507727852011021400000) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 31 (SIG2) - 32 (GND3) SERVICES button is pressed 305 to 313 ohms 31 (SIG2) - 32 (GND3) Phone button is pressed 812 to 831 ohms 31 (SIG2) - 32 (GND3) PTT button is pressed 1811 to 1848 ohms NG --> REPLACE MAP LIGHT ASSEMBLY (MAYDAY SWITCH) THEN CLEAR HISTORIC DTC OK: Go to next step
3. REPLACE TELEPHONE ECU ASSEMBLY TOGETHER WITH MAYDAY BATTERY NEXT --> See step 4
4. PERFORM REGISTRATION. Refer to «REGISTRATION»(ref-385285-S20978396562011021400000)

This DTC is stored when one of the following occurs: 1) the telephone ECU assembly is malfunctioning; 2) the mayday switch on the map light assembly is malfunctioning; or 3) the wire harness between the telephone ECU assembly and the map light is open.

Scheme 156

Scheme 157

1. CHECK HARNESS AND CONNECTOR (TELEPHONE ECU ASSEMBLY - MAP LIGHT ASSEMBLY) Disconnect the P3 ECU connector. Disconnect the R7 map light connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition P3-5 (SIG1) - R7-30 (SIG1) Always Below 1 ohms P3-12 (SIG-) - R7-32 (GND3) Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR THEN CLEAR HISTORIC DTC OK: Go to next step
2. INSPECT MAP LIGHT ASSEMBLY (MAYDAY SWITCH) Remove the map light. Refer to «REMOVAL»(ref-385288-S17507727852011021400000) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 30 (SIG1) - 32 (GND3) Emergency button is pressed 305 to 313 ohms 30 (SIG1) - 32 (GND3) VOL+ button is pressed 812 to 831 ohms 30 (SIG1) - 32 (GND3) VOL- button is pressed 1811 to 1848 ohms NG --> REPLACE MAP LIGHT ASSEMBLY (MAYDAY SWITCH) THEN CLEAR HISTORIC DTC OK: Go to next step
3. REPLACE TELEPHONE ECU ASSEMBLY TOGETHER WITH MAYDAY BATTERY NEXT --> See step 4
4. PERFORM REGISTRATION. Refer to «REGISTRATION»(ref-385285-S20978396562011021400000)

This DTC is stored when one of the following occurs: 1) the telephone ECU assembly is malfunctioning; 2) the bus buffer ECU is malfunctioning; 3) the main body ECU is malfunctioning; or 4) the CAN line/wire harness is open or shorted.

Scheme 158

This DTC is stored when one of the following occurs: 1) the telephone ECU assembly is malfunctioning; 2) the center airbag sensor is malfunctioning; or 3) the communication line is open or shorted.

Scheme 159

Scheme 160

1. CHECK FOR DTC (BLINKING PATTERN) Turn the engine switch from on (IG) to off. Turn the engine switch on (IG) and wait for 10 seconds. Check for the DTC again and wait for 20 seconds. Refer to «DTC CHECK / CLEAR»(ref-385285-S27742832902011021400000) . OK DTC 5-2 is not output. NG --> See step 2 OK --> See step 6
2. CHECK SUPPLEMENTAL RESTRAINT SYSTEM Check for DTC using the Techstream. Refer to «DIAGNOSIS SYSTEM»(ref-385222-S33412669092011021400000) . RESULT Result Proceed to DTC related to supplemental restraint system output A No DTC output B A --> See step 7 B: Go to next step
3. CHECK HARNESS AND CONNECTOR (TELEPHONE ECU ASSEMBLY - CENTER AIRBAG SENSOR) Disconnect the cable from the negative (-) battery terminal and wait for 90 seconds. WARNING: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system. NOTE: After the engine switch is turned off, the HDD navigation system requires approximately 6 minutes to record various types of memory and settings. As a result, after turning the engine switch off, wait 6 minutes or more before disconnecting the cable from the negative (-) battery terminal. When disconnecting the cable, some systems need to be initialized after the cable is reconnected. Refer to «INITIALIZATION»(ref-385196-S36681500272011021400000) . Disconnect the P2 ECU connector. Disconnect the E47 airbag sensor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition P2-16 (GSW) - E47-24 (GSW3) Always Below 1 ohms P2-16 (GSW) or E47-24 (GSW3) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR THEN CLEAR HISTORIC DTC OK: Go to next step
4. REPLACE TELEPHONE ECU ASSEMBLY TOGETHER WITH MAYDAY BATTERY NEXT --> See step 5
5. PERFORM REGISTRATION. Refer to «REGISTRATION»(ref-385285-S20978396562011021400000)
6. CLEAR HISTORIC DTC. Refer to «DTC CHECK / CLEAR»(ref-385285-S27742832902011021400000)
7. GO TO SUPPLEMENTAL RESTRAINT SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-385233-S32788714612011021400000)

This DTC is stored when the mayday battery (backup battery) voltage decreases to a specified level.

This DTC is stored when the vehicle battery voltage decreases to 9.0 V with the engine switch on (IG).

This DTC is stored when the mayday battery (backup battery) has been used.

After the engine switch is turned on (IG) and 10 seconds or more have passed, if the telephone ECU assembly does not recognize the mayday battery (backup battery), this DTC is stored.

HINT

This DTC is only a historic DTC.

Scheme 161

Scheme 162

1. CHECK HARNESS AND CONNECTOR (TELEPHONE ECU ASSEMBLY - MAYDAY BATTERY) Disconnect the P3 ECU connector. Disconnect the P4 battery connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition P3-2 (BBI+) - P4-1 (BBO+) Always Below 1 ohms P3-9 (BBI-) - P4-2 (BBO-) Always Below 1 ohms P3-2 (BBI+) or P4-1 (BBO+) - Body ground Always 10 kohms or higher P3-9 (BBI-) or P4-2 (BBO-) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR THEN CLEAR HISTORIC DTC OK: Go to next step
2. REPLACE MAYDAY BATTERY (BACKUP BATTERY) Replace the mayday battery. Refer to «REMOVAL»(ref-385269-S26917090892011021400000) . Perform registration. Refer to «REGISTRATION - Step 4»(ref-385285-S21893725832011021400000) . Check for DTC again. Refer to «DTC CHECK / CLEAR»(ref-385285-S27742832902011021400000) . OK No DTCs output. NG --> REPLACE TELEPHONE ECU ASSEMBLY THEN PERFORM REGISTRATION OK --> See step 3
3. END (MAYDAY BATTERY IS FAULTY; CLEAR HISTORIC DTC). Refer to «DTC CHECK / CLEAR»(ref-385285-S27742832902011021400000)

This DTC is stored when communication stops between the telephone ECU assembly and bus buffer ECU.

Scheme 163

Scheme 164

Scheme 165

1. CHECK HARNESS AND CONNECTOR (COMMUNICATION LINE) Disconnect the P2 and P5 ECU connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition P2-23 (MPX1) - P5-5 (S1) Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (TELEPHONE ECU ASSEMBLY - VEHICLE BATTERY AND BODY GROUND) Disconnect the P2 ECU connector. Measure the voltage and resistance according to the value(s) in the table below. Standard Voltage Standard Resistance Tester Connection Condition Specified Condition P2-1 (+B) - Body ground Always 11 to 14 V Tester Connection Condition Specified Condition P2-12 (E) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. REPLACE TELEPHONE ECU ASSEMBLY TOGETHER WITH MAYDAY BATTERY NEXT --> See step 4
4. PERFORM REGISTRATION. Refer to «REGISTRATION»(ref-385285-S20978396562011021400000)

This circuit supplies power to operate the telephone ECU assembly.

Scheme 166

Scheme 167

1. INSPECT FUSE (TEL, IGN, ACC) Remove the TEL and IGN fuses from the engine room relay block. Remove the ACC fuse from the cowl side junction block LH. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition TEL fuse Always Below 1 ohms IGN fuse Always Below 1 ohms ACC fuse Always Below 1 ohms NG --> REPLACE FUSE OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (ECU - VEHICLE BATTERY AND BODY GROUND) Disconnect the P2 ECU connector. Measure the voltage and resistance according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition P2-1 (+B) - Body ground Always 11 to 14 V P2-13 (IG2) - Body ground Engine switch on (IG) 11 to 14 V Engine switch off Below 1 V P2-14 (ACC) - Body ground Engine switch on (ACC) 11 to 14 V Engine switch off Below 1 V Standard Resistance Tester Connection Condition Specified Condition P2-12 (E) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. REPLACE TELEPHONE ECU ASSEMBLY TOGETHER WITH MAYDAY BATTERY NEXT --> See step 4
4. PERFORM REGISTRATION. Refer to «REGISTRATION»(ref-385285-S20978396562011021400000)