Lighting System (Diagnostics & Circuit Tests): Overview Scion xB II рестайлинг

DESCRIPTION

1. The running light relay assembly receives the light control switch HEAD signal and the ambient light level signal from the automatic light control sensor to control the headlight (H-LP) relay. HINT: If only a low beam headlight bulb on one side does not illuminate, inspect the bulb, fuse, or wire harness related to the bulb.

Scheme 109

1. When both of the following conditions are met, the high beam headlights will come on. Low beam headlights are turned on by the automatic light control or manual light control. Dimmer switch is in HIGH position.
2. The running light relay assembly dims the high beam headlights when operating them as daytime running lights.
3. When the dimmer switch is turned to the HIGH FLASH position, the high beam headlights will come on. HINT: If only a high beam headlight on one side does not illuminate, inspect the fuse, bulb, or wire harness that is related to the bulb. Before performing troubleshooting of the high beam headlight control, check that the low beam headlight operates normally.

Scheme 110

1. The running light relay assembly receives the following signals: Light control switch TAIL or HEAD signal Dimmer switch HIGH or HIGH FLASH (PASS) signal

Scheme 111

The main body ECU detects the condition of the door courtesy light switches.

HINT

1. The main body ECU receives door courtesy light switch signals to control the illuminated entry system.

1. When performing troubleshooting, inspect the switch that is related to the malfunction only. For example, if the illuminated entry system does not operate when opening the front passenger side door with the ignition switch off, inspect the front passenger side door courtesy light switch circuit only.

Scheme 112

Scheme 113

Scheme 114

1. READ VALUE USING TECHSTREAM (DOOR COURTESY SW) 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. According to the display on the Techstream, read the Data List. MAIN BODY Tester Display Measurement Item/Range Normal Condition Diagnostic Note D Door Courtesy SW Driver side door courtesy light switch signal/ ON or OFF ON: Driver side door is open OFF: Driver side door is closed - P Door Courtesy SW Passenger side door courtesy light switch signal/ ON or OFF ON: Passenger side door is open OFF: Passenger side door is closed - RR Door Courtesy SW Rear door RH courtesy light switch signal/ ON or OFF ON: Rear door RH is open OFF: Rear door RH is closed - RL Door Courtesy SW Rear door LH courtesy light switch signal/ ON or OFF ON: Rear door LH is open OFF: Rear door LH is closed - Back Door Courtesy SW Back door courtesy switch signal/ ON or OFF ON: Back door is open OFF: Back door is closed - OK Normal conditions listed above are displayed. RESULT Result Proceed to OK A Front door courtesy light switch RH or LH does not operate B Rear door courtesy light switch RH or LH does not operate C Back door courtesy switch does not operate D B --> See step 2 C --> See step 4 D --> See step 6 A --> See step 8
2. INSPECT FRONT DOOR COURTESY LIGHT SWITCH Remove the front door courtesy light switch. Refer to «REMOVAL»(ref-511401-S20285604532012102600000). Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition 1 - Switch body ON (Not pushed) Below 1 ohms 1 - Switch body OFF (Pushed) 10 kohms or higher TEXT IN ILLUSTRATION *a Component without harness connected (Front Door Courtesy Light Switch) *b Switch Body NG --> See step 9 OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY LIGHT SWITCH - MAIN BODY ECU) Disconnect the H1 front door courtesy light switch LH connector. Disconnect the I1 front door courtesy light switch RH connector. Disconnect the 2A or 2E main body ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance LH SIDE Tester Connection Condition Specified Condition H1-1 - 2A-21 (DCTY) Always Below 1 ohms H1-1 - Body ground Always 10 kohms or higher RH SIDE Tester Connection Condition Specified Condition I1-1 - 2E-20 (PCTY) Always Below 1 ohms I1-1 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE MAIN BODY ECU
4. INSPECT REAR DOOR COURTESY LIGHT SWITCH Remove the rear door courtesy light switch. Refer to «REMOVAL»(ref-511401-S35500386292012102600000). Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition 1 - Switch body ON (Not pushed) Below 1 ohms 1 - Switch body OFF (Pushed) 10 kohms or higher TEXT IN ILLUSTRATION *a Component without harness connected (Rear Door Courtesy Light Switch) *b Switch Body NG --> See step 10 OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (REAR DOOR COURTESY LIGHT SWITCH - MAIN BODY ECU) Disconnect the H3 rear door courtesy light switch LH connector. Disconnect the I3 rear door courtesy light switch RH connector. Disconnect the 2E or C45 main body ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance LH SIDE Tester Connection Condition Specified Condition H3-1 - C45-13 (LCTY) Always Below 1 ohms H3-1 - Body ground Always 10 kohms or higher RH SIDE Tester Connection Condition Specified Condition I3-1 - 2E-19 (RCTY) Always Below 1 ohms I3-1 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE MAIN BODY ECU
6. INSPECT BACK DOOR LOCK ASSEMBLY Remove the back door lock assembly. Refer to «DISASSEMBLY»(ref-511410-S11075043832012102600000). Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 (ACT-) - 3 (D+) Locked 10 kohms or higher Unlocked Below 1 ohms TEXT IN ILLUSTRATION *a Component without harness connected (Back Door Lock Assembly) *b Lock *c Unlock NG --> See step 11 OK: Go to next step
7. CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK ASSEMBLY - MAIN BODY ECU AND BODY GROUND) Disconnect the L3 back door lock assembly connector. Disconnect the 2A main body ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition L3-3 (D+) - 2A-7 (BCTY) Always Below 1 ohms L3-3 (D+) - Body ground Always 10 kohms or higher L3-1 (ACT-) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE MAIN BODY ECU
8. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-511436-S09711483722012102600000)
9. REPLACE FRONT DOOR COURTESY LIGHT SWITCH. Refer to «REMOVAL»(ref-511401-S20285604532012102600000)
10. REPLACE REAR DOOR COURTESY LIGHT SWITCH. Refer to «REMOVAL»(ref-511401-S35500386292012102600000)
11. REPLACE BACK DOOR LOCK ASSEMBLY. Refer to «DISASSEMBLY»(ref-511410-S11075043832012102600000)

The main body ECU receives door lock position switch signals to control the illuminated entry system.

Scheme 115

The running light relay assembly receives an engine condition signal via the generator.

Scheme 116

Scheme 117

1. CHECK RUNNING LIGHT RELAY ASSEMBLY Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition E91-8 (CHG-) - Body ground Engine running 11 to 14 V TEXT IN ILLUSTRATION *a Component with harness connected (Running Light Relay Assembly) NG --> See step 2 OK --> See step 3
2. INSPECT GENERATOR ASSEMBLY Inspect generator assembly. Refer to «INSPECTION»(/scion/xb/ii-2010-2015/remont/charging-system/#charging-system-service-information) . NG --> See step 4 OK --> REPAIR OR REPLACE HARNESS OR CONNECTOR (GENERATOR ASSEMBLY - RUNNING LIGHT RELAY ASSEMBLY)
3. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-511436-S09711483722012102600000)
4. REPLACE GENERATOR ASSEMBLY. Refer to «REMOVAL»(/scion/xb/ii-2010-2015/remont/charging-system/#charging-system-service-information)

The main body ECU receives information regarding the door courtesy switch and door lock position switch, and turns on the room light assembly.

Scheme 118

The running light relay assembly receives the parking brake switch signal.

Scheme 119

Scheme 120

1. CHECK HARNESS AND CONNECTOR (RUNNING LIGHT RELAY ASSEMBLY - BODY GROUND) Disconnect the C52 running light relay assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition C52-9 (PKB) - Body ground Parking brake is released 10 kohms or higher C52-9 (PKB) - Body ground Parking brake is applied Below 1 ohms NG --> See step 2 OK --> See step 3
2. INSPECT PARKING BRAKE SWITCH ASSEMBLY Remove the parking brake switch assembly. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Resistance 1 - Switch body Shaft is pushed in 10 kohms or higher 1 - Switch body Shaft is not pushed in Below 1 ohms TEXT IN ILLUSTRATION *a Component without harness connected (Parking Brake Switch Assembly) *a Free *b Pushed in NG --> See step 4 OK --> REPAIR OR REPLACE HARNESS OR CONNECTOR (PARKING BRAKE SWITCH CIRCUIT)
3. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-511436-S09711483722012102600000)
4. REPLACE PARKING BRAKE SWITCH ASSEMBLY. Refer to «REMOVAL»(/scion/xb/ii-2010-2015/remont/parking-brake-system/#parking-brake-service-information)

1. The running light relay assembly receives the light control switch TAIL signal to control the taillight relay.

HINT

1. If only one taillight does not illuminate, check the bulb or wire harness related to the bulb.
2. The taillight relay is installed in the instrument panel junction block, so unlike conventional relays, it cannot be removed for inspection.

Scheme 121

The running light relay assembly receives headlight dimmer switch assembly information to control the high beam headlight indicator.

Scheme 122

This circuit detects the state of the ignition switch, and sends it to the running light relay assembly.

Scheme 123

See also:
• INSPECTION
• REMOVAL