Lighting System (Interior): Overview Toyota Corolla X

SYSTEM DESCRIPTION

1. ILLUMINATED ENTRY SYSTEM The illuminated entry system provides convenience when getting in or out of the vehicle at night. This function is controlled by the main body ECU. The operation and condition of this control are described below.

OPERATION AND CONDITION REFERENCE

OPERATION CHECK

1. INSPECT ILLUMINATED ENTRY SYSTEM OPERATION

Note. Perform this inspection with the customize parameter at the initial setting.

HINT

The illuminated entry system illuminates the lights below.

1. Personal light*1
2. Room light
3. Engine switch illumination*2 The operation and condition of this control are described below.

OPERATION AND CONDITION REFERENCE

DESCRIPTION

The main body ECU receives the IG signal to control the illuminated entry system.

Scheme 1

The main body ECU receives the ACC signal to control the illuminated entry system.

Scheme 2

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

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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. Main Body (Main Body ECU) DATA LIST REFERENCE Tester Display Measurement Item/Range Normal Condition Diagnostic Note D Door Courtesy SW Driver side door courtesy switch signal/ON or OFF ON: Driver side door is open OFF: Driver side door is closed - P Door Courtesy SW Front passenger side door courtesy switch signal/ON or OFF ON: Front passenger side door is open OFF: Front passenger side door is closed - RR Door Courtesy SW Rear door courtesy switch RH signal/ON or OFF ON: Rear door RH is open OFF: Rear door RH is closed - RL Door Courtesy SW Rear door courtesy switch LH signal/ON or OFF ON: Rear door LH is open OFF: Rear door LH is closed - Luggage Courtesy SW Luggage compartment door courtesy switch signal/ON or OFF ON: Luggage compartment door is open OFF: Luggage compartment door is closed - OK: Normal conditions listed above are displayed. NG: Go to step 2 OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See «PROBLEM SYMPTOMS TABLE»(ref-338661-S10111302792009082800000) )
2. INSPECT DOOR COURTESY SWITCH Inspect the front door courtesy switch (See «INSPECTION»(ref-338661-S42521082512009082800000) ), rear door courtesy switch (See «INSPECTION»(ref-338661-S19744515692009082800000) ), or luggage compartment door courtesy switch (See «INSPECTION»(ref-338661-S39245969812009082800000) ). OK: Door courtesy switches are normal. NG: REPLACE DOOR COURTESY SWITCH OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - SWITCH) Disconnect the E50*1 or E61*2 main body ECU connector. Disconnect the 2A and 2E instrument panel junction block connectors. Disconnect the L18 door lock assembly connector. Disconnect each door courtesy switch connector. Measure the resistance according to the value(s) in the table below. Standard Resistance: Front LH TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition 2A-21 (DCTY) - L3-1 Always Below 1 ohms L3-1 - Body ground Always 10 kohms or higher Front RH TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition 2E-20 (PCTY) - M1-1 Always Below 1 ohms M1-1 - Body ground Always 10 kohms or higher Rear LH TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition E50-8 (LCTY)*1 - L5-1 E61-13 (LCTY)*2 - L5-1 Always Below 1 ohms L5-1 - Body ground Always 10 kohms or higher Rear RH TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition 2E-19 (RCTY) - M3-1 Always Below 1 ohms M3-1 - Body ground Always 10 kohms or higher Luggage Compartment Door TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition 2A-7 (BCTY) - L18-3 Always Below 1 ohms L18-3 - Body ground Always 10 kohms or higher L18-2 - Body ground Always Below 1 ohms HINT: *1: w/ Smart Key System *2: w/o Smart Key System NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

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

Scheme 5

The main body ECU controls the personal light*1 and room light according to the door courtesy switch, door lock position switch, and ignition switch conditions.

HINT

*1: w/ Sliding Roof

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When either of the following conditions is met, the engine switch illumination comes on.

1. Light control switch is in TAIL position.
2. Interior light is turned on by the illuminated entry system.

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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 the operation. Main Body (Main Body ECU) ACTIVE TEST REFERENCE Tester Display Test Part Control Range Diagnostic Note Indicator for Lighting Engine switch illumination (All doors are closed) ON/OFF - OK: Engine switch illumination comes on. NG: Go to step 2 OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See «PROBLEM SYMPTOMS TABLE»(ref-338661-S10111302792009082800000) )
2. INSPECT ENGINE SWITCH Remove the engine switch. Connect a (+) lead from the battery to terminal 11 and a (-) lead to terminal 4 or 5. Check that the illumination comes on. OK: Engine switch illumination comes on. NG: REPLACE ENGINE SWITCH OK: Go to next step
3. CHECK HARNESS OR CONNECTOR (ENGINE SWITCH - MAIN BODY ECU AND BODY GROUND) Disconnect the E51 main body ECU connector. Disconnect the E38 engine switch connector. Measure the resistance according to the value(s) in the table below.

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Scheme 9

OK: REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

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1. REMOVE MAP LIGHT ASSEMBLY (w/o Sliding Roof) Using a moulding remover, disengage the 4 clips. Disconnect the connector and remove the map light assembly.
2. REMOVE MAP LIGHT ASSEMBLY (w/ Sliding Roof) Using a moulding remover, disengage the 4 clips. Disconnect the connector and remove the map light assembly.
3. REMOVE MAP LIGHT BULB (w/o Sliding Roof) Turn the 2 map light bulbs and the 2 map light sockets in the direction indicated by the arrow and remove them as a unit. Remove the 2 map light bulbs from the 2 map light sockets.
4. REMOVE MAP LIGHT BULB (w/ Sliding Roof) Turn the 2 map light bulbs and the 2 map light sockets in the direction indicated by the arrow and remove them as a unit. Remove the 2 map light bulbs from the 2 map light sockets.

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1. INSPECT MAP LIGHT ASSEMBLY (w/o Sliding Roof) Connect a positive (+) lead from the battery to terminal 1 and a negative (-) lead to terminal 2. Check that the personal lights come on. OK CONNECTOR TERMINALS REFERENCE Condition Specified Condition Personal light switch LH ON Personal light LH comes on Personal light switch LH OFF Personal light LH does not come on Personal light switch RH ON Personal light RH comes on Personal light switch RH OFF Personal light RH does not come on If the result is not as specified, replace the bulb or personal light assembly.
2. INSPECT MAP LIGHT ASSEMBLY (w/ Sliding Roof) Personal light switch operation Connect a positive (+) lead from the battery to terminal 6 and a negative (-) lead to terminal 7. Inspect the personal light operation while the interior light switch is off. OK CONNECTOR TERMINALS REFERENCE Condition Specified Condition Personal light switch LH ON Personal light LH comes on Personal light switch LH OFF Personal light LH does not come on Personal light switch RH ON Personal light RH comes on Personal light switch RH OFF Personal light RH does not come on If the result is not as specified, replace the bulb or map light assembly. Interior light switch operation Connect a positive (+) lead from the battery to terminal 6 and a negative (-) lead to both terminals 1 and 7. Inspect the personal light operation while both of the personal light switches (LH and RH) are off.

OK

CONNECTOR TERMINALS REFERENCE

If the result is not as specified, replace the bulb or map light assembly.

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1. INSTALL MAP LIGHT BULB (w/o Sliding Roof) Install the 2 map light bulbs to the 2 map light sockets. Turn the 2 map light bulbs and the 2 map light sockets in the direction indicated by the arrow and install them as a unit.
2. INSTALL MAP LIGHT BULB (w/ Sliding Roof) Install the 2 map light bulbs to the 2 map light sockets. Turn the 2 map light bulbs and the 2 map light sockets in the direction indicated by the arrow and install them as a unit.
3. INSTALL MAP LIGHT ASSEMBLY (w/o Sliding Roof) Connect the connector. Engage the 4 clips and install the map light assembly.
4. INSTALL MAP LIGHT ASSEMBLY (w/ Sliding Roof) Connect the connector. Engage the 4 clips and install the map light assembly.

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1. REMOVE NO. 1 ROOM LIGHT ASSEMBLY Using a screwdriver, disengage the 4 claws and remove the lens cover. HINT: Tape the screwdriver tip before use. Disengage the claw and guide in the order shown in the illustration, and remove the room light cover. HINT: Use the same procedure for the RH side and the LH side. Using a screwdriver, disengage the 2 claws as shown in the illustration. HINT: Tape the screwdriver tip before use. Disengage the 2 claws. Using a screwdriver, disengage the 4 claws and remove the No. 1 room light assembly.

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1. INSPECT NO. 1 ROOM LIGHT ASSEMBLY Measure the resistance according to the value(s) in the table below. Standard Resistance TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition Terminal E - Body ground Always Below 1 ohms If the result is not as specified, repair or replace harness or connector. Measure the voltage according to the value(s) in the table below. Standard Voltage TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition Terminal B - Body ground Always 11 to 14 V If the result is not as specified, repair or replace the harness or connector. Remove the wire harness from the room light assembly. Measure the resistance according to the value(s) in the table below. Standard Resistance TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition Terminal E - Light Busbar Light switch OFF 10 kohms or higher Light switch ON Below 1 ohms Terminal CTY - Light Busbar Light switch OFF 10 kohms or higher Light switch in DOOR Below 1 ohms Terminal B - Bulb Terminal Always Below 1 ohms If the result is not as specified, replace the switch base. Connect a (+) lead from the battery to terminal B and a (-) lead to light busbar. Check that the light comes on. OK: The light comes on. If the result is not as specified, replace the bulb.

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1. INSTALL NO. 1 ROOM LIGHT ASSEMBLY Engage the guide and claw in the order shown in the illustration, and install the room light cover. HINT: Use the same procedure for the RH side and the LH side. Engage the 4 claws and install the lens cover. Engage the 4 claws and install the room light switch base to the No. 1 room light assembly. Engage the 4 claws and install the No. 1 room light assembly.

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