Lighting System (Diagnostic Codes & Circuit Tests): Overview Lexus RX III рестайлинг

DESCRIPTION

The automatic light control sensor detects ambient light, converts it into an electrical signal, and outputs it to the main body ECU (multiplex network body ECU). The main body ECU (multiplex network body ECU) turns on or off the headlights and taillights according to the signal.

Scheme 152

The AFS ECU (headlight swivel ECU assembly) receives signals indicating the swerve-angle from the steering angle sensor (spiral cable sub-assembly) using CAN communication.

Scheme 153

The AFS ECU (headlight swivel ECU assembly) receives signals indicating the swerve-angle from the steering angle sensor (spiral cable sub-assembly) using CAN communication.

The AFS ECU (headlight swivel ECU assembly) receives signals indicating the front right wheel speed from the skid control ECU using CAN communication.

Scheme 154

The AFS ECU (headlight swivel ECU assembly) receives signals indicating the front right wheel speed from the skid control ECU using CAN communication.

The DTC is stored when the AFS ECU (headlight swivel ECU assembly) detects a malfunction in the rear height control sensor sub-assembly RH power source or rear height control sensor sub-assembly RH.

Scheme 155

Scheme 156

1. CHECK FOR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-602572-S39476733052014030500000) . Check for DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-602572-S39476733052014030500000) . OK DTC B2416 is not output. NG --> See step 2 OK --> See step 7
2. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / AFS / Data List. Read the display on the Techstream. AFS Tester Display Measurement Item/Range Normal Condition Diagnostic Note Height Sens Pw Supply Val Rear height control sensor power supply value / 0 to 6.25 V Approx. 5.0 V - OK Normal conditions listed above are displayed. NG --> See step 4 OK: Go to next step
3. INSPECT REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY RH Connect 3 dry cell batteries (1.5 V) in series. Remove the rear height control sensor sub-assembly RH. Refer to «COMPONENTS [03/2012 - ]»(ref-602715-S35347600522014030500000) . Connect a positive (+) lead from the battery to terminal 3 (SHB) and a negative (-) lead from the battery to terminal 1 (SHG). Measure the voltage between terminals 2 (SHRR) and 1 (SHG) while slowly moving the link up and down. Standard Voltage Tester Connection Condition Specified Condition 2 (SHRR) - 1 (SHG) +45° (High) 4.05 V 0° (Normal) 2.25 V -45° (Low) 0.45 V TEXT IN ILLUSTRATION *1 Component without harness connected (Rear Height Control Sensor Sub-assembly RH) NG --> See step 8 OK --> See step 6
4. CHECK HARNESS AND CONNECTOR (AFS ECU - REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY RH) Disconnect the A53 AFS ECU (headlight swivel ECU assembly) connector. Disconnect the R4 rear height control sensor sub-assembly RH connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A53-18 (SBR) - R4-3 (SHB) Always Below 1 ohms A53-21 (SGR) - R4-1 (SHG) Always Below 1 ohms A53-18 (SBR) - Body ground Always 10 kohms or higher A53-21 (SGR) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Rear Height Control Sensor Sub-assembly RH) *2 Front view of wire harness connector (to AFS ECU (Headlight Swivel ECU Assembly)) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. INSPECT REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY RH Connect 3 dry cell batteries (1.5 V) in series. Remove the rear height control sensor sub-assembly RH. Refer to «COMPONENTS [03/2012 - ]»(ref-602715-S35347600522014030500000) . Connect a positive (+) lead from the battery to terminal 3 (SHB) and a negative (-) lead from the battery to terminal 1 (SHG). Measure the voltage between terminals 2 (SHRR) and 1 (SHG) while slowly moving the link up and down. Standard Voltage Tester Connection Condition Specified Condition 2 (SHRR) - 1 (SHG) +45° (High) 4.05 V 0° (Normal) 2.25 V -45° (Low) 0.45 V TEXT IN ILLUSTRATION *1 Component without harness connected (Rear Height Control Sensor Sub-assembly RH) NG --> See step 8 OK --> See step 6
6. REPLACE AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY). Refer to «COMPONENTS [03/2012 - ]»(ref-602715-S24760932342014030500000)
7. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - 07/2012]»(ref-602551-S27510191402014030500000)
8. REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY RH. Refer to «COMPONENTS [03/2012 - ]»(ref-602715-S35347600522014030500000)

The DTC is stored when the AFS ECU (headlight swivel ECU assembly) detects a malfunction in the rear height control sensor sub-assembly RH power source or rear height control sensor sub-assembly RH.

The headlight swivel motor receives a signal from the AFS ECU (headlight swivel ECU assembly) to operate. The AFS ECU (headlight swivel ECU assembly) receives a signal indicating the operating conditions of the headlight swivel motor.

Scheme 157

The headlight swivel motor receives a signal from the AFS ECU (headlight swivel ECU assembly) to operate. The AFS ECU (headlight swivel ECU assembly) receives a signal indicating the operating conditions of the headlight swivel motor.

The AFS ECU (headlight swivel ECU assembly) receives signals indicating the height of the vehicle from the rear height control sensor sub-assembly RH.

Scheme 158

1. CHECK FOR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-602572-S39476733052014030500000) . Check for DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-602572-S39476733052014030500000) . OK DTC B241A is not output. NG --> See step 2 OK --> See step 8
2. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / AFS / Data List. Read the display on the Techstream. AFS Tester Display Measurement Item/Range Normal Condition Diagnostic Note Height Sens Pw Supply Val Rear height control sensor power supply value / 0 to 6.25 V Approx. 5.0 V - Rr Height Sens Signal Val Rear height control sensor signal value / 0 to 5 V Approx. 2.5 V (When the vehicle is level) Value is changed according to vehicle height OK Normal conditions listed above are displayed. NG --> See step 4 OK: Go to next step
3. INSPECT REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY RH Connect 3 dry cell batteries (1.5 V) in series. Remove the rear height control sensor sub-assembly RH. Refer to «COMPONENTS [03/2012 - ]»(ref-602715-S35347600522014030500000) . Connect a positive (+) lead from the battery to terminal 3 (SHB) and a negative (-) lead from the battery to terminal 1 (SHG). Measure the voltage between terminals 2 (SHRR) and 1 (SHG) while slowly moving the link up and down. Standard Voltage Tester Connection Condition Specified Condition 2 (SHRR) - 1 (SHG) +45° (High) 4.05 V 0° (Normal) 2.25 V -45° (Low) 0.45 V TEXT IN ILLUSTRATION *1 Component without harness connected (Rear Height Control Sensor Sub-assembly RH) NG --> See step 7 OK --> See step 6
4. CHECK HARNESS AND CONNECTOR (AFS ECU - REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY RH) Disconnect the A53 AFS ECU (headlight swivel ECU assembly) connector. Disconnect the R4 rear height control sensor sub-assembly RH connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A53-19 (SHRL) - R4-2 (SHRR) Always Below 1 ohms A53-19 (SHRL) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Rear Height Control Sensor Sub-assembly RH) *2 Front view of wire harness connector (to AFS ECU (Headlight Swivel ECU Assembly)) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. INSPECT REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY RH Connect 3 dry cell batteries (1.5 V) in series. Remove the rear height control sensor sub-assembly RH. Refer to «COMPONENTS [03/2012 - ]»(ref-602715-S35347600522014030500000) . Connect a positive (+) lead from the battery to terminal 3 (SHB) and a negative (-) lead from the battery to terminal 1 (SHG). Measure the voltage between terminals 2 (SHRR) and 1 (SHG) while slowly moving the link up and down. Standard Voltage Tester Connection Condition Specified Condition 2 (SHRR) - 1 (SHG) +45° (High) 4.05 V 0° (Normal) 2.25 V -45° (Low) 0.45 V TEXT IN ILLUSTRATION *1 Component without harness connected (Rear Height Control Sensor Sub-assembly RH) NG --> See step 7 OK --> See step 6
6. REPLACE AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY). Refer to «COMPONENTS [03/2012 - ]»(ref-602715-S24760932342014030500000)
7. REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY RH. Refer to «COMPONENTS [03/2012 - ]»(ref-602715-S35347600522014030500000)
8. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - 07/2012]»(ref-602551-S27510191402014030500000)

The AFS ECU (headlight swivel ECU assembly) receives signals indicating the height of the vehicle from the rear height control sensor sub-assembly RH.

When the AFS ECU (headlight swivel ECU assembly) detects a malfunction in itself, the DTC is stored.

When the AFS ECU (headlight swivel ECU assembly) detects a malfunction in itself, the DTC is stored.

The AFS ECU (headlight swivel ECU assembly) receives a signal from each headlight swivel motor using LIN communication.

The AFS ECU (headlight swivel ECU assembly) receives a signal from each headlight swivel motor using LIN communication.

The AFS ECU (headlight swivel ECU assembly) stores this DTC if initialization has not been performed after the ECU was replaced.

The AFS ECU (headlight swivel ECU assembly) sets this DTC if the vehicle specifications have not been stored in the ECU.

The AFS ECU (headlight swivel ECU assembly) stores this DTC if the sensor value received from the height control sensor is out of range when performing initialization of the AFS ECU (headlight swivel ECU assembly); for example, the vehicle is not level or being jacked up.

This DTC is stored if the AFS ECU is not installed properly.

This DTC is stored if the AFS ECU is not installed properly.

These DTCs are stored when the CAN communication system is malfunctioning.

These DTCs are stored when the CAN communication system is malfunctioning.

The main body ECU (multiplex network body ECU) receives the following switch information

1. Light control switch position off, tail, head or AUTO
2. Dimmer switch position high, low or high flash (pass)
3. Fog light switch position on or off

Scheme 159

The main body ECU (multiplex network body ECU) receives the following switch information

1. Light control switch position off, tail, head or AUTO
2. Dimmer switch position high, low or high flash (pass)
3. Fog light switch position on or off

The main body ECU (multiplex network body ECU) controls the daytime running lights.

Scheme 160

The main body ECU (multiplex network body ECU) controls the daytime running lights.

The main body ECU (multiplex network body ECU) controls the front fog light relay.

Scheme 161

The main body ECU (multiplex network body ECU) controls the front fog light relay.

The outer mirror control ECU receives the signal from the main body ECU (multiplex network body ECU) to control the door mirror foot light.

Scheme 162

The outer mirror control ECU receives the signal from the main body ECU (multiplex network body ECU) to control the door mirror foot light.

The main body ECU (multiplex network body ECU) detects the condition of the parking brake switch.

Scheme 163

The main body ECU (multiplex network body ECU) detects the condition of the parking brake switch.

The main body ECU (multiplex network body ECU) controls the operation of the TAIL relay.

Scheme 164

The main body ECU (multiplex network body ECU) controls the operation of the TAIL relay.

1. By connecting terminals LVL and CG of the DLC3, the zero point of the height control sensor is set in the AFS ECU (headlight swivel ECU assembly).

Scheme 165

1. By connecting terminals LVL and CG of the DLC3, the zero point of the height control sensor is set in the AFS ECU (headlight swivel ECU assembly).

The main body ECU (multiplex network body ECU) controls the headlight relays.

Scheme 166

Scheme 167

1. for Halogen Headlight
2. for HID Headlight

The main body ECU (multiplex network body ECU) controls the headlight relays.

The main body ECU (multiplex network body ECU) controls the high beam headlights.

Scheme 168

The main body ECU (multiplex network body ECU) controls the high beam headlights.