Lighting System (Diagnostic Codes & Circuit Tests): Other Toyota Corolla XI

PROCEDURE

1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Body Electrical / Main Body / Data List. Read the display on the Techstream. Body Electrical > Main Body > Data List Tester Display Measurement Item Range Normal Condition Diagnostic Note Illumination Rate Info Illumination rate information 0.00 ms. to 2162.65 ms. Value is output according to ambient light level - Body Electrical > Main Body > Data List Tester Display Illumination Rate Info OK Normal condition listed above is displayed. Result Proceed to OK NG Result: 1 OK REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL [08/2013 - ]»(ref-635627-S03921509152014070300000) Result: 2 NG See step 2
2. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) - AUTOMATIC LIGHT CONTROL SENSOR) Disconnect the F1 automatic light control sensor connector. Disconnect the E31 main body ECU (multiplex network body ECU) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E31-22 (CLTE) - F1-3 (CLTE) Always Below 1 ohms E31-21 (CLTS) - F1-4 (CLTS) Always Below 1 ohms E31-20 (CLTB) - F1-1 (CLTB) Always Below 1 ohms E31-22 (CLTE) - Body ground Always 10 kohms or higher E31-21 (CLTS) - Body ground Always 10 kohms or higher E31-20 (CLTB) - Body ground Always 10 kohms or higher Result Proceed to OK NG Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR Result: 1 OK See step 3
3. INSPECT MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Reconnect the E31 main body ECU (multiplex network body ECU) connector. *a Component with harness connected (Main Body ECU (Multiplex Network Body ECU)) Measure the voltage and resistance according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition E31-20 (CLTB) - E31-22 (CLTE) Ignition switch off Below 1 V Ignition switch ON 11 to 14 V Standard Resistance Tester Connection Condition Specified Condition E31-22 (CLTE) - Body ground Always Below 1 ohms Result Proceed to OK NG Result: 2 NG REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL [08/2013 - ]»(ref-635627-S03921509152014070300000) Result: 1 OK See step 4
4. INSPECT AUTOMATIC LIGHT CONTROL SENSOR Reconnect the F1 automatic light control sensor connector. *a Component with harness connected (Automatic Light Control Sensor) Connect an oscilloscope to the automatic light control sensor connector. Check the waveform. OK Tester Connection Tool Setting Condition Specified Condition F1-3 (CLTE) - F1-4 (CLTS) 5 V/DIV., 5 ms./DIV. Ignition switch ON, light control switch in AUTO position Correct waveform is as shown HINT: If the ambient light becomes brighter, width A becomes narrower. Result Proceed to OK NG Result: 1 OK REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL [08/2013 - ]»(ref-635627-S03921509152014070300000) Result: 2 NG REPLACE AUTOMATIC LIGHT CONTROL SENSOR. Refer to «REMOVAL [08/2013 - ]»(ref-635610-S24540990402014070300000)

1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Body Electrical / Combination Meter / Data List. Read the display on the Techstream. Body Electrical > Combination Meter > Data List Tester Display Measurement Item Range Normal Condition Diagnostic Note Turn Signal Switch (Right) Turn signal switch (right) signal ON or OFF ON: Turn signal switch (right) on OFF: Turn signal switch (right) off - Turn Signal Switch (Left) Turn signal switch (left) signal ON or OFF ON: Turn signal switch (left) on OFF: Turn signal switch (left) off - Turn Switch Signal (Full Turn) Turn signal switch (full turn) signal ON or OFF ON: Turn signal switch (left or right) on OFF: Turn signal switch (left and right) off - Body Electrical > Combination Meter > Data List Tester Display Turn Signal Switch (Right) Turn Signal Switch (Left) Turn Switch Signal (Full Turn) OK Normal conditions listed above are displayed. Result Proceed to OK NG Result: 1 OK PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE [08/2013 - ]»(ref-635445-S33172269652014070300000) Result: 2 NG See step 2
2. INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY Remove the headlight dimmer switch assembly. Refer to «REMOVAL [08/2013 - 04/2014]»(ref-635610-S41449169582014070300000) & «REMOVAL [04/2014 - ]»(ref-635610-S15107336172014070300000) Measure the resistance according to the value(s) in the table below. *a Component without harness connected (Headlight Dimmer Switch Assembly) Standard Resistance Tester Connection Condition Specified Condition 12 (TR) - 15 (EL) Turn signal switch in neutral position 10 kohms or higher 11 (TL) - 15 (EL) Turn signal switch in neutral position 10 kohms or higher 13 (CR) - 15 (EL) Turn signal switch in neutral position 10 kohms or higher 12 (TR) - 15 (EL) Turn signal switch in right turn position Below 1 ohms 13 (CR) - 15 (EL) Turn signal switch in full right turn position Below 1 ohms 11 (TL) - 15 (EL) Turn signal switch in left turn position Below 1 ohms 13 (CR) - 15 (EL) Turn signal switch in full left turn position Below 1 ohms Result Proceed to OK NG Result: 2 NG REPLACE HEADLIGHT DIMMER SWITCH ASSEMBLY. Refer to «REMOVAL [08/2013 - 04/2014]»(ref-635610-S41449169582014070300000) & «REMOVAL [04/2014 - ]»(ref-635610-S15107336172014070300000) Result: 1 OK See step 3
3. CHECK HARNESS AND CONNECTOR (HEADLIGHT DIMMER SWITCH ASSEMBLY - COMBINATION METER ASSEMBLY) Disconnect the E43 and E47 combination meter assembly connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E10-12 (TR) - E47-9 (ER) Always Below 1 ohms E10-11 (TL) - E47-10 (EL) Always Below 1 ohms E10-13 (CR) - E43-29 (L) Always Below 1 ohms E10-15 (EL) - Body ground Always Below 1 ohms E47-9 (ER) - Body ground Always 10 kohms or higher E47-10 (EL) - Body ground Always 10 kohms or higher E43-29 (L) - Body ground Always 10 kohms or higher Result Proceed to OK NG Result: 1 OK PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE [08/2013 - ]»(ref-635445-S33172269652014070300000) Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR

1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Body Electrical / Main Body / Data List. Read the display on the Techstream. Body Electrical > Main Body > Data List Tester Display Measurement Item Range Normal Condition Diagnostic Note Dimmer SW Dimmer switch high position signal ON or OFF ON: Dimmer switch in high or high flash position OFF: Dimmer switch in low position - Passing Light SW Dimmer switch high flash position (pass) signal ON or OFF ON: Dimmer switch in high flash position OFF: Dimmer switch not in high flash position - Front Fog Light SW Fog light switch front position signal ON or OFF ON: Fog light switch in front position OFF: Fog light switch off w/ Front Fog Light Auto Light SW Light control switch AUTO (DRL) position signal ON or OFF ON: Light control switch in AUTO (DRL) position OFF: Light control switch not in AUTO (DRL) position for Light Control Switch with AUTO or DRL position Head Light SW (Head) Light control switch head position signal ON or OFF ON: Light control switch in head position OFF: Light control switch not in head position - Head Light SW (Tail) Light control switch tail position signal ON or OFF ON: Light control switch in tail or head position OFF: Light control switch in neither tail nor head position - Body Electrical > Main Body > Data List Tester Display Dimmer SW Passing Light SW Front Fog Light SW Auto Light SW Head Light SW (Head) Head Light SW (Tail) OK Normal conditions listed above are displayed. Result Proceed to OK NG Result: 1 OK PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE [08/2013 - ]»(ref-635445-S33172269652014070300000) Result: 2 NG See step 2
2. INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY HINT: Inspect the items that did not change as a result of monitoring the Data List. Remove the headlight dimmer switch assembly. Refer to «REMOVAL [08/2013 - 04/2014]»(ref-635610-S41449169582014070300000) & «REMOVAL [04/2014 - ]»(ref-635610-S15107336172014070300000) Measure the resistance according to the value(s) in the table below. *A for Light Control Switch with AUTO or DRL Position *B w/ Front Fog Light *a Component without harness connected (Headlight Dimmer Switch Assembly) Standard Resistance LIGHT CONTROL SWITCH Tester Connection Condition Specified Condition 18 (T) - 15 (EL) Light control switch off (DRL OFF*3) 10 kohms or higher 19 (H) - 15 (EL) Light control switch off (DRL OFF*3) 10 kohms or higher 20 (A)*1 - 15 (EL) Light control switch off (DRL OFF*3) 10 kohms or higher 18 (T) - 15 (EL) Light control switch in tail position Below 1 ohms 18 (T) - 15 (EL) Light control switch in head position Below 1 ohms 19 (H) - 15 (EL) Light control switch in head position Below 1 ohms 20 (A)*1 - 15 (EL) Light control switch in AUTO (DRL) position Below 1 ohms DIMMER SWITCH Tester Connection Condition Specified Condition 14 (HU) - 15 (EL) Dimmer switch in low position 10 kohms or higher 14 (HU) - 15 (EL) Dimmer switch in high position Below 1 ohms 14 (HU) - 15 (EL) Dimmer switch in high flash position Below 1 ohms 17 (HF) - 15 (EL) Dimmer switch in high flash position Below 1 ohms FOG LIGHT SWITCH Tester Connection Condition Specified Condition 9 (BFG)*2 - 8 (LFG) Fog light switch off 10 kohms or higher 9 (BFG)*2 - 8 (LFG) Fog light switch in front position Below 1 ohms *1: for Light Control Switch with AUTO or DRL Position *2: w/ Front Fog Light *3: w/ DRL OFF Switch Result Proceed to OK NG Result: 2 NG REPLACE HEADLIGHT DIMMER SWITCH ASSEMBLY. Refer to «REMOVAL [08/2013 - 04/2014]»(ref-635610-S41449169582014070300000) & «REMOVAL [04/2014 - ]»(ref-635610-S15107336172014070300000) Result: 1 OK See step 3
3. CHECK HARNESS AND CONNECTOR (HEADLIGHT DIMMER SWITCH ASSEMBLY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) Disconnect the E31 main body ECU (multiplex network body ECU) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E10-9 (BFG)*2 - E31-27 (FFOG)*2 Always Below 1 ohms E10-14 (HU) - E31-5 (HU) Always Below 1 ohms E10-17 (HF) - E31-8 (HF) Always Below 1 ohms E10-18 (T) - E31-30 (TAIL) Always Below 1 ohms E10-19 (H) - E31-29 (HEAD) Always Below 1 ohms E10-20 (A)*1 - E31-28 (A)*1 Always Below 1 ohms E10-9 (BFG)*2 - Body ground Always 10 kohms or higher E10-14 (HU) - Body ground Always 10 kohms or higher E10-17 (HF) - Body ground Always 10 kohms or higher E10-18 (T) - Body ground Always 10 kohms or higher E10-19 (H) - Body ground Always 10 kohms or higher E10-20 (A)*1 - Body ground Always 10 kohms or higher E10-15 (EL) - Body ground Always Below 1 ohms E10-8 (LFG)*2 - Body ground Always Below 1 ohms *1: for Light Control Switch with AUTO or DRL Position *2: w/ Front Fog Light Result Proceed to OK NG Result: 1 OK REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL [08/2013 - ]»(ref-635627-S03921509152014070300000) Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR

1. CHECK OPERATION (LOW BEAM HEADLIGHTS) Check the operation of the low beam headlights. OK The low beam headlights operate normally. Result Proceed to OK NG Result: 2 NG GO TO PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE [08/2013 - ]»(ref-635445-S33172269652014070300000) Result: 1 OK See step 2
2. PERFORM ACTIVE TEST USING TECHSTREAM Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Body Electrical / Main Body / Active Test. Check that the daytime running lights illuminate. Body Electrical > Main Body > Active Test Tester Display Measurement Item Control Range Diagnostic Note Daytime Running Light Daytime running lights ON/OFF - Body Electrical > Main Body > Active Test Tester Display Daytime Running Light OK The daytime running lights illuminate with the appropriate brightness. Result Proceed to OK NG Result: 1 OK PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE [08/2013 - ]»(ref-635445-S33172269652014070300000) Result: 2 NG See step 3
3. INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY Remove the driver side junction block assembly. Refer to «REMOVAL [08/2013 - ]»(ref-635627-S03921509152014070300000) Remove the main body ECU (multiplex network body ECU) from the driver side junction block assembly. Measure the resistance according to the value(s) in the table below. *a Component without harness connected (Driver Side Junction Block Assembly) - - Standard Resistance Tester Connection Condition Specified Condition 3A-28 - MB-25 (DRL) Always Below 1 ohms 3A-49 - MB-25 (DRL) Always Below 1 ohms Result Proceed to OK NG Result: 1 OK REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL [08/2013 - ]»(ref-635627-S03921509152014070300000) Result: 2 NG REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY. Refer to «REMOVAL [08/2013 - ]»(ref-635627-S03921509152014070300000)

CAUTION / NOTICE / HINT

Note. Inspect the fuses and bulbs for circuits related to this system before performing the following procedure.

Scheme 78

Scheme 79

1. CHECK OPERATION (TAILLIGHTS) Check the operation of the taillights. OK Taillights operate normally. Result Proceed to OK NG Result: 2 NG GO TO PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE [08/2013 - ]»(ref-635445-S33172269652014070300000) Result: 1 OK See step 2
2. PERFORM ACTIVE TEST USING TECHSTREAM Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Body Electrical / Main Body / Active Test. Check that the relay operates. Body Electrical > Main Body > Active Test Tester Display Measurement Item Control Range Diagnostic Note Front Fog Light Relay Front fog light relay ON/OFF Light control switch is in tail position Body Electrical > Main Body > Active Test Tester Display Front Fog Light Relay OK Front fog light relay operates. (Front fog lights come on.) Result Proceed to OK NG Result: 1 OK PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE [08/2013 - ]»(ref-635445-S33172269652014070300000) Result: 2 NG See step 3
3. CHECK HARNESS AND CONNECTOR (FR FOG RELAY - BATTERY) Remove the FR FOG relay. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition 5 - Body ground Always 11 to 14 V Result Proceed to OK NG Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR Result: 1 OK See step 4
4. CHECK HARNESS AND CONNECTOR (FR FOG RELAY INPUT VOLTAGE) Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition 2 - Body ground Taillights on 11 to 14 V Result Proceed to OK NG Result: 2 NG See step 9 Result: 1 OK See step 5
5. INSPECT FR FOG RELAY Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 3 - 5 Voltage not applied between terminals 1 and 2 10 kohms or higher 3 - 5 Voltage applied between terminals 1 and 2 Below 1 ohms Result Proceed to OK NG Result: 2 NG REPLACE FR FOG RELAY Result: 1 OK See step 6
6. CHECK HARNESS AND CONNECTOR (FR FOG RELAY - FOG LIGHT ASSEMBLY LH AND FOG LIGHT ASSEMBLY RH) Disconnect the A19 fog light assembly LH connector. Disconnect the A16 fog light assembly RH connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 3 - A19-2 Always Below 1 ohms 3 - A16-2 Always Below 1 ohms 3 - Body ground Always 10 kohms or higher Result Proceed to OK NG Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR Result: 1 OK See step 7
7. CHECK HARNESS AND CONNECTOR (FR FOG RELAY - DRIVER SIDE JUNCTION BLOCK ASSEMBLY) Disconnect the 3C driver side junction block assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - 3C-43 Always Below 1 ohms 1 - Body ground Always 10 kohms or higher Result Proceed to OK NG Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR Result: 1 OK See step 8
8. INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY Remove the driver side junction block assembly. Refer to «REMOVAL [08/2013 - ]»(ref-635627-S03921509152014070300000) Remove the main body ECU (multiplex network body ECU) from the driver side junction block assembly. Measure the resistance according to the value(s) in the table below. *a Component without harness connected (Driver Side Junction Block Assembly) - - Standard Resistance Tester Connection Condition Specified Condition 3C-43 - MB-13 (FFGO) Always Below 1 ohms Result Proceed to OK NG Result: 1 OK REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL [08/2013 - ]»(ref-635627-S03921509152014070300000) Result: 2 NG REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY. Refer to «REMOVAL [08/2013 - ]»(ref-635627-S03921509152014070300000)
9. CHECK HARNESS AND CONNECTOR (FR FOG RELAY - DRIVER SIDE JUNCTION BLOCK ASSEMBLY) Disconnect the 3D driver side junction block assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2 - 3D-37 Always Below 1 ohms 2 - Body ground Always 10 kohms or higher Result Proceed to OK NG Result: 1 OK REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY. Refer to «REMOVAL [08/2013 - ]»(ref-635627-S03921509152014070300000) Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR

Note. Inspect the fuses and bulbs for circuits related to this system before performing the following procedure.

Scheme 80

1. PERFORM ACTIVE TEST USING TECHSTREAM Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Body Electrical / Main Body / Active Test. Check that the relay operates. Body Electrical > Main Body > Active Test Tester Display Measurement Item Control Range Diagnostic Note Taillight Relay Taillight relay ON/OFF - Body Electrical > Main Body > Active Test Tester Display Taillight Relay OK Taillight relay operates. (Taillights illuminate.) Result Proceed to OK NG Result: 1 OK PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE [08/2013 - ]»(ref-635445-S33172269652014070300000) Result: 2 NG See step 2
2. CHECK HARNESS AND CONNECTOR (BATTERY - DRIVER SIDE JUNCTION BLOCK ASSEMBLY) Disconnect the 3B driver side junction block assembly connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition 3B-1 - Body ground Always 11 to 14 V Result Proceed to OK NG Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR Result: 1 OK See step 3
3. INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY Remove the driver side junction block assembly. Refer to «REMOVAL [08/2013 - ]»(ref-635627-S03921509152014070300000) Remove the main body ECU (multiplex network body ECU) from the driver side junction block assembly. *a Component without harness connected (Driver Side Junction Block Assembly) - - Connect a positive (+) lead from the battery to terminal 3B-1. Connect a negative (-) lead from the battery to terminal MB-14 (TRLY). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition 3A-6 - Battery negative (-) terminal Always 11 to 14 V 3A-4 - Battery negative (-) terminal Always 11 to 14 V 3E-29 - Battery negative (-) terminal Always 11 to 14 V 3A-2 - Battery negative (-) terminal Always 11 to 14 V 3A-3 - Battery negative (-) terminal Always 11 to 14 V Result Proceed to OK NG Result: 1 OK REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL [08/2013 - ]»(ref-635627-S03921509152014070300000) Result: 2 NG REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY. Refer to «REMOVAL [08/2013 - ]»(ref-635627-S03921509152014070300000)

Note. Inspect the fuses for circuits related to this system before performing the following procedure.

1. PERFORM ACTIVE TEST USING TECHSTREAM Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Body Electrical / Main Body / Active Test. Check that the headlight relay operates. Body Electrical > Main Body > Active Test Tester Display Measurement Item Control Range Diagnostic Note Headlight Relay Headlight relay (Low beam headlights) ON/OFF - Body Electrical > Main Body > Active Test Tester Display Headlight Relay OK Headlight relay operates. (Low beam headlights illuminate with the appropriate brightness.) Result Proceed to OK NG Result: 1 OK PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE [08/2013 - ]»(ref-635445-S33172269652014070300000) Result: 2 NG See step 2
2. INSPECT H-LP RELAY Remove the H-LP relay from the engine room relay block and junction block assembly. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 3 - 5 Voltage not applied between terminals 1 and 2 10 kohms or higher 3 - 5 Voltage applied between terminals 1 and 2 Below 1 ohms Result Proceed to OK NG Result: 2 NG REPLACE H-LP RELAY Result: 1 OK See step 3
3. CHECK HARNESS AND CONNECTOR (BATTERY - H-LP RELAY) Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition 1 - Body ground Always 11 to 14 V 3 - Body ground Always 11 to 14 V Result Proceed to OK NG Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR Result: 1 OK See step 4
4. CHECK HARNESS AND CONNECTOR (H-LP RELAY - HEADLIGHT ASSEMBLY LH AND HEADLIGHT ASSEMBLY RH) Disconnect the A30 headlight assembly LH connector. Disconnect the A29 headlight assembly RH connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 5 - A30-1 (LO) Always Below 1 ohms 5 - A29-1 (LO) Always Below 1 ohms 5 - Body ground Always 10 kohms or higher Result Proceed to OK NG Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR Result: 1 OK See step 5
5. CHECK HARNESS AND CONNECTOR (H-LP RELAY - DRIVER SIDE JUNCTION BLOCK ASSEMBLY) Disconnect the 3A driver side junction block assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2 - 3A-34 Always Below 1 ohms 2 - Body ground Always 10 kohms or higher Result Proceed to OK NG Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR Result: 1 OK See step 6
6. INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY Remove the driver side junction block assembly. Refer to «REMOVAL [08/2013 - ]»(ref-635627-S03921509152014070300000) Remove the main body ECU (multiplex network body ECU) from the driver side junction block assembly. Measure the resistance according to the value(s) in the table below. *a Component without harness connected (Driver Side Junction Block Assembly) - - Standard Resistance Tester Connection Condition Specified Condition 3A-34 - MB-15 (HRLY) Always Below 1 ohms 3A-34 - Body ground Always 10 kohms or higher Result Proceed to OK NG Result: 1 OK REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL [08/2013 - ]»(ref-635627-S03921509152014070300000) Result: 2 NG REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY. Refer to «REMOVAL [08/2013 - ]»(ref-635627-S03921509152014070300000)

Note. Inspect the fuses and bulbs for circuits related to this system before performing the following procedure. Check the operation of the low beam headlights. If the low beam headlights do not operate normally, refer to Problem Symptoms Table. Refer to PROBLEM SYMPTOMS TABLE [08/2013 - ]

Scheme 81

Scheme 82

1. PERFORM ACTIVE TEST USING TECHSTREAM Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Body Electrical / Main Body / Active Test. Check that the high beam headlights illuminate. Body Electrical > Main Body > Active Test Tester Display Measurement Item Control Range Diagnostic Note Head Light Hi High beam headlights ON/OFF - Body Electrical > Main Body > Active Test Tester Display Head Light Hi OK The high beam headlights illuminate. Result Proceed to OK NG Result: 1 OK PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE [08/2013 - ]»(ref-635445-S33172269652014070300000) Result: 2 NG See step 2
2. INSPECT DIM RELAY Remove the DIM relay from the engine room relay block and junction block assembly. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 3 - 5 Voltage not applied between terminals 1 and 2 10 kohms or higher 3 - 5 Voltage applied between terminals 1 and 2 Below 1 ohms Result Proceed to OK NG Result: 2 NG REPLACE DIM RELAY Result: 1 OK See step 3
3. CHECK HARNESS AND CONNECTOR (H-LP RELAY - DIM RELAY) Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition 2 - Body ground Headlights (low beam) on 11 to 14 V 3 - Body ground Headlights (low beam) on 11 to 14 V Result Proceed to OK NG Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR Result: 1 OK See step 4
4. CHECK HARNESS AND CONNECTOR (DIM RELAY - HEADLIGHT ASSEMBLY LH AND HEADLIGHT ASSEMBLY RH) Disconnect the A28 headlight assembly LH connector. Disconnect the A27 headlight assembly RH connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 5 - A28-2 (HI) Always Below 1 ohms 5 - A27-2 (HI) Always Below 1 ohms 5 - Body ground Always 10 kohms or higher Result Proceed to OK NG Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR Result: 1 OK See step 5
5. CHECK HARNESS AND CONNECTOR (DIM RELAY - DRIVER SIDE JUNCTION BLOCK ASSEMBLY) Disconnect the 3A driver side junction block assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - 3A-50 Always Below 1 ohms 1 - Body ground Always 10 kohms or higher Result Proceed to OK NG Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR Result: 1 OK See step 6
6. INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY Remove the driver side junction block assembly. Refer to «REMOVAL [08/2013 - ]»(ref-635627-S03921509152014070300000) Remove the main body ECU (multiplex network body ECU) from the driver side junction block assembly. Measure the resistance according to the value(s) in the table below. *a Component without harness connected (Driver Side Junction Block Assembly) - - Standard Resistance Tester Connection Condition Specified Condition 3A-50 - MB-22 (DIM) Always Below 1 ohms Result Proceed to OK NG Result: 1 OK REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL [08/2013 - ]»(ref-635627-S03921509152014070300000) Result: 2 NG REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY. Refer to «REMOVAL [08/2013 - ]»(ref-635627-S03921509152014070300000)