Lighting: Overview — Scion xB II (2007-2010)

SYSTEM DESCRIPTION

LIGHTING SYSTEM Illumination control system (Illuminated entry system): When the doors are unlocked through a key or transmitter operation, or when a door is opened or closed, the illuminated entry system turns on the interior light. The main body ECU receives the following signals (A). Door courtesy light switch signal Door detection switch signal Ignition switch signal The main body ECU controls the following signal based on the signals listed in A. Illumination operation signal The main body ECU controls the on/off and fade-in/fade-out operation of the following parts. Room light assembly Battery saver system: When the ignition switch is turned to OFF and any of the doors is open continuously for 20 minutes, the main body ECU turns the illumination operation signal off. As a result, the room light assembly turn off. The main body ECU receives the following signals (B). Door courtesy light switch signal Engine switch signal The main body ECU controls the following signal based on the signals listed in B (C). Illumination operation signal The main body ECU controls the illumination period of the following parts based on the signals listed in C. Room light assembly

DESCRIPTION

The turn signal flasher assembly in the main body ECU turns on when it receives signals from the headlight dimmer switch integrated with the turn signal switch, causing the turn signal lights to flash.

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Scheme 1: WIRING DIAGRAM

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Scheme 3: INSPECTION PROCEDURE

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CHECK OPERATION OF TURN SIGNAL LIGHT When the turn signal light switch is operated, check that the appropriate turn signal light flashes. Result RESULT REFERENCE Result Proceed to No lights flash A Front turn signal light (LH or RH) does not flash B Side turn signal light (LH or RH) does not flash C Rear turn signal light (LH or RH) does not flash D B: Go to step 8 C: Go to step 12 D: Go to step 17 A: Go to Next Step
INSPECT FUSE (ECU-IG NO. 2, TURN-HAZ) Remove the ECU IG NO. 2 fuse from the main body ECU. Remove the TURN-HAZ fuse from the engine room relay block. Measure the resistance according to the value (s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition ECU IG NO. 2 fuse Always Below 1 ohms TURN-HAZ fuse Always Below 1 ohms Reinstall the ECU IG NO. 2 and TURN-HAZ fuses. NG: REPLACE FUSE (See «PARTS LOCATION»(ref-289762-S34220633722008070700000) ) OK: Go to Next Step
INSPECT HEADLIGHT DIMMER SWITCH Remove the headlight dimmer switch. Inspect the turn signal light switch. Measure the resistance according to the value (s) in the table below Standard resistance RESISTANCE SPECIFICATION Tester Connection Switch Condition Specified Condition 13 (TR) - 12 (EL) Right Below 1 ohms 13 (TR) - 12 (EL) Neutral 10 kohms or higher 15 (TL) - 12 (EL) Left Below 1 ohms 15 (TL) - 12 (EL) Neutral 10 kohms or higher Reinstall the headlight dimmer switch. NG: REPLACE HEADLIGHT DIMMER SWITCH (See «REMOVAL»(ref-289762-S08372555642008070700000) ) OK: Go to Next Step
CHECK HARNESS AND CONNECTOR (HEADLIGHT DIMMER SWITCH - MAIN BODY ECU) Disconnect the C11 headlight dimmer switch connector. Disconnect the 2S main body ECU connector. Measure the resistance according to the value (s) in the table below Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition C11-15 (TL) - 2S-11 (EL) Always Below 1 ohms C11-13 (TR) - 2S-12 (ER) Always Below 1 ohms C11-12 (EL) - 2S-1 (E) Always Below 1 ohms C11-15 (TL) or 2S-11 (EL) - Body ground Always 10 kohms or higher C11-13 (TR) or 2S-12 (ER) - Body ground Always 10 kohms or higher C11-12 (EL) or 2S-1 (E) - Body ground Always 10 kohms or higher Reconnect the headlight dimmer switch connector. Reconnect the main body ECU connector. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to Next Step
CHECK HARNESS AND CONNECTOR (TURN-HAZ FUSE - MAIN BODY ECU) Disconnect the 2B main body ECU connector. Measure the voltage according to the value (s) in the table below. Standard voltage VOLTAGE SPECIFICATION Tester Connection Condition Specified Condition 2B-32 (+B)- Body ground Always 11 to 14 V Reconnect the main body ECU connector. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to Next Step
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BODY GROUND) Disconnect the 2E main body ECU connector. Measure the resistance according to the value (s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition 2E-17 (E) - Body ground Always Below 1 ohms Reconnect the main body ECU connector. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to Next Step
INSPECT MAIN BODY ECU Remove the main body ECU. Remove the turn signal flasher assembly from the main body ECU. Remove the IG1 relay from the main body ECU. Measure the resistance according to the value (s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition 2B-32 - Turn signal flasher assembly terminal 4 (+B) Always Below 1 ohms 2E-17 - 2S-1 - Turn signal flasher assembly terminal 7 (E) Always Below 1 ohms 2S-11 - Turn signal flasher assembly terminal 5 (EL) Always Below 1 ohms 2S-12 - Turn signal flasher assembly terminal 6 (ER) Always Below 1 ohms IG1 relay terminal 3- Turn signal flasher assembly terminal 1 (IG) Always Below 1 ohms Reinstall the IG1 relay. Reinstall the turn signal flasher assembly. Reinstall the main body ECU. NG: REPLACE MAIN BODY ECU OK: REPLACE TURN SIGNAL FLASHER ASSEMBLY (See «PARTS LOCATION»(ref-289762-S34220633722008070700000) )
INSPECT BULB (FRONT TURN SIGNAL BULB) Remove the front turn signal light Apply battery voltage to the terminals and check that the front turn signal light illuminates. OK MEASUREMENT CONDITION AND SPECIFIED CONDITION Measurement Condition Specified Condition Positive battery - Terminal 3 Negative battery - Terminal 2 Front turn signal light illuminates Reinstall the front turn signal light. NG: REPLACE BULB (See «DISASSEMBLY»(ref-289762-S30460201102008070700000) ) OK: Go to Next Step
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - FRONT TURN SIGNAL LIGHT BULB) Disconnect the A6 and A12 front turn signal light connectors. Disconnect the 2B main body ECU connector. Measure the resistance according to the value (s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition 2B-31 (LR) - A12-3 Always Below 1 ohms 2B-14 (LL) - A6-3 Always Below 1 ohms 2B-31 (LR) or A12-3 - Body ground Always 10 kohms or higher 2B-14 (LL) or A6-3 - Body ground Always 10 kohms or higher Reconnect the front turn signal light connectors. Reconnect the main body ECU connector. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to Next Step
CHECK HARNESS AND CONNECTOR (FRONT TURN SIGNAL LIGHT - BODY GROUND) Disconnect the A6 and A12 front turn signal light connectors. Measure the resistance according to the value (s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition A6-2 - Body ground Always Below 1 ohms A12-2 - Body ground Always Below 1 ohms Reconnect the front turn signal light connectors. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to Next Step
INSPECT MAIN BODY ECU Remove the main body ECU. Remove the turn signal flasher assembly from the main body ECU. Measure the resistance according to the value (s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition 2B-14 - Turn signal flasher assembly terminal 3 (LL) Always Below 1 ohms 2B-31 - Turn signal flasher assembly terminal 2 (LR) Always Below 1 ohms Reinstall the turn signal flasher assembly. Reinstall the main body ECU. NG: REPLACE MAIN BODY ECU OK: REPLACE TURN SIGNAL FLASHER ASSEMBLY (See «PARTS LOCATION»(ref-289762-S34220633722008070700000) )
INSPECT SIDE TURN SIGNAL LIGHT ASSEMBLY Remove the side turn signal light assembly from the outer rear view mirror assembly. Apply battery voltage to the terminals and check that the side turn signal light illuminates. OK MEASUREMENT CONDITION AND SPECIFIED CONDITION Measurement Condition Specified Condition Positive battery - Terminal 1 Negative battery - Terminal 2 Side turn signal light illuminates Reinstall the side turn signal light assembly. NG: REPLACE SIDE TURN SIGNAL LIGHT ASSEMBLY (See «REMOVAL»(ref-289762-S24709020002008070700000) ) OK: Go to Next Step
INSPECT OUTER REAR VIEW MIRROR ASSEMBLY (SYSTEM VOLTAGE) Disconnect the D2 and E2 outer rear view mirror assembly connectors. Measure the voltage according to the value (s) in the table below Standard voltage VOLTAGE SPECIFICATION Tester Connection Switch Condition Specified Condition D2-4 - D2-5 Turn signal (right turn) OFF --> ON Below 1 V --> 11 to 14 V (60 to 120 times per minute) E2-4 - E2-5 Turn signal (left turn) OFF --> ON Below 1 V --> 11 to 14 V (60 to 120 times per minute) Reconnect the outer rear view mirror assembly connectors. NG: Go to step 14 OK: REPLACE OUTER REAR VIEW MIRROR ASSEMBLY (See «REMOVAL»(ref-289778-S22980910482008070700000) )
CHECK HARNESS AND CONNECTOR (OUTER REAR VIEW MIRROR ASSEMBLY - MAIN BODY ECU) Disconnect the D2 and E2 side turn signal light assembly connectors. Disconnect the 2S main body ECU connector. Measure the resistance according to the value (s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition 2S-16 (LR) - D2-4 Always Below 1 ohms 2S-13 (LL) - E2-4 Always Below 1 ohms 2S-16 (LR) or D2-4 - Body ground Always 10 kohms or higher 2S-13 (LL) or E2-4 - Body ground Always 10 kohms or higher Reconnect the outer rear view mirror assembly connectors. Reconnect the main body ECU connector NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to Next Step
CHECK HARNESS AND CONNECTOR (OUTER REAR VIEW MIRROR ASSEMBLY - BODY GROUND) Disconnect the D2 and E2 outer rear view mirror assembly connectors. Measure the resistance according to the value (s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition D2-5 - Body ground Always Below 1 ohms E2-5 - Body ground Always Below 1 ohms Reconnect the outer rear view mirror assembly connectors. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to Next Step
INSPECT MAIN BODY ECU Remove the main body ECU. Remove the turn signal flasher assembly from the main body ECU. Measure the resistance according to the value (s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition 2S-13 - Turn signal flasher assembly terminal 3 (LL) Always Below 1 ohms 2S-16 - Turn signal flasher assembly terminal 2 (LR) Always Below 1 ohms Reinstall the turn signal flasher assembly. Reinstall the main body ECU. NG: REPLACE MAIN BODY ECU OK: REPLACE TURN SIGNAL FLASHER ASSEMBLY (See «PARTS LOCATION»(ref-289762-S34220633722008070700000) )
INSPECT BULB (REAR TURN SIGNAL LIGHT BULB) Remove the rear combination light assembly. Apply battery voltage to the terminals and check that the rear turn signal light illuminates. OK MEASUREMENT CONDITION AND SPECIFIED CONDITION Measurement Condition Specified Condition Positive battery - Terminal 2 Negative battery - Terminal 1 Rear turn signal light illuminates Reinstall the rear combination light assembly. NG: REPLACE BULB (See «REMOVAL»(ref-289762-S15573166552008070700000) ) OK: Go to Next Step
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - REAR TURN SIGNAL LIGHT BULB) Disconnect the H5 and H6 rear combination light assembly connectors. Disconnect the 2A main body ECU connector. Measure the resistance according to the value (s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition 2A-28 (LR) - H6-2 Always Below 1 ohms 2A-27 (LL) - H5-2 Always Below 1 ohms 2A-28 (LR) or H6-2 -Body ground Always 10 kohms or higher 2A-27 (LL) or H5-2 -Body ground Always 10 kohms or higher Reconnect the rear combination light assembly connectors. Reconnect the main body ECU connector. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to Next Step
CHECK HARNESS AND CONNECTOR (REAR TURN SIGNAL LIGHT - BODY GROUND) Disconnect the H5 and H6 rear combination light assembly connectors. Measure the resistance according to the value (s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition H5-1 - Body ground Always Below 1 ohms H6-1 - Body ground Always Below 1 ohms NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to Next Step
INSPECT MAIN BODY ECU Remove the main body ECU. Remove the turn signal flasher assembly from the main body ECU. Measure the resistance according to the value (s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition 2A-27 - Turn signal flasher assembly terminal 3 (LL) Always Below 1 ohms 2A-28 - Turn signal flasher assembly terminal 2 (LR) Always Below 1 ohms Reinstall the turn signal flasher assembly. Reinstall the main body ECU. NG: REPLACE MAIN BODY ECU OK: REPLACE TURN SIGNAL FLASHER ASSEMBLY (See «PARTS LOCATION»(ref-289762-S34220633722008070700000) )

When the hazard warning signal switch is turned on, the turn signal flasher assembly in the main body ECU turns on to flash the hazard warning signal lights

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Scheme 22: WIRING DIAGRAM

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Scheme 23: INSPECTION PROCEDURE

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INSPECT FUSE (TURN-HAZ) Remove the TURN-HAZ fuse from the engine room relay block. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition TURN-HAZ fuse Always Below 1 ohms Reinstall the TURN-HAZ fuse. NG: REPLACE FUSE (See «PARTS LOCATION»(ref-289762-S34220633722008070700000) ) OK: Go to Next Step
INSPECT HAZARD WARNING SIGNAL SWITCH Remove the hazard warning signal switch. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Switch Condition Specified Condition 1 - 4 OFF 10 kohms or higher 1 - 4 ON Below 1 ohms Reinstall the hazard warning signal switch. NG: REPLACE HAZARD WARNING SIGNAL SWITCH (See «REMOVAL»(ref-289762-S21990853442008070700000) ) OK: Go to Next Step
CHECK HARNESS AND CONNECTOR (HAZARD WARNING SIGNAL SWITCH - MAIN BODY ECU) Disconnect the C35 hazard warning signal switch connector. Disconnect the 2S main body ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition C35 - 4-2S-17 (HAZ) Always Below 1 ohms C35-4 or 2S-17 (HAZ) - Body ground Always 10 kohms or higher Reconnect the hazard warning signal switch connector. Reconnect the main body ECU connector. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to Next Step
CHECK HARNESS AND CONNECTOR (HAZARD WARNING SIGNAL SWITCH - BODY GROUND) Disconnect the C35 hazard warning signal switch connector. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition C35-1 - Body ground Always Below 1 ohms Reconnect the hazard warning signal switch connector. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to Next Step
CHECK HARNESS AND CONNECTOR (TURN-HAZ FUSE - MAIN BODY ECU) Disconnect the 2B main body ECU connector. Measure the voltage according to the value(s) in the table below. Standard voltage VOLTAGE SPECIFICATION Tester Connection Condition Specified Condition 2B-32 (+B) - Body ground Always 11 to 14 V Reconnect the main body ECU connector. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to Next Step
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BODY GROUND) Disconnect the 2E main body ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition 2E-17 (E)- Body ground Always Below 1 ohms Reconnect the main body ECU connector. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to Next Step
INSPECT MAIN BODY ECU Remove the main body ECU. Remove the turn signal flasher assembly from the main body ECU. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition 2B-32 - Turn signal flasher assembly terminal 4 (+B) Always Below 1 ohms 2E-17 - Turn signal flasher assembly terminal 7 (E) Always Below 1 ohms 2S-17 - Turn signal flasher assembly terminal 8 (HAZ) Always Below 1 ohms Reinstall the turn signal flasher assembly. Reinstall the main body ECU. NG: REPLACE MAIN BODY ECU OK: REPLACE TURN SIGNAL FLASHER ASSEMBLY (See «PARTS LOCATION»(ref-289762-S34220633722008070700000) )

When the light control switch, located on the headlight dimmer switch, is turned to the TAIL position, the front parking lights, front side marker lights, rear taillights and license plate light illuminate.

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Scheme 29: WIRING DIAGRAM

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Scheme 30: INSPECTION PROCEDURE

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CHECK WHETHER LIGHTS ILLUMINATE Check whether the following lights illuminate: Front parking light, Front side marker lights, Rear taillights and License plate light Result RESULT REFERENCE Result Proceed To No lights illuminate A Front parking lights do not illuminate B Front side marker lights do not illuminate C Rear taillights do not illuminate D License plate lights do not illuminate E B: Go to step 6 C: Go to step 8 D: Go to step 10 E: Go to step 12 A: Go to Next Step
INSPECT FUSE (TAIL) Remove the TAIL fuse from the main body ECU. Measure the resistance according to the value (s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition TAIL fuse Always Below 1 ohms Reinstall the TAIL fuse. NG: REPLACE FUSE (See «PARTS LOCATION»(ref-289762-S34220633722008070700000) ) OK: Go to Next Step
INSPECT HEADLIGHT DIMMER SWITCH (LIGHT CONTROL SWITCH) Remove the headlight dimmer switch assembly. Inspect the light control switch. Measure the resistance according to the value (s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Switch Condition Specified Condition C11-18 (T) - C11-12 (EL) OFF 10 kohms or higher C11-18 (T) - C11-12 (EL) TAIL Below 1 ohms C11-18 (T) - C11-12 (EL) HEAD Below 1 ohms Reinstall the headlight dimmer switch. NG: REPLACE HEADLIGHT DIMMER SWITCH (See «REMOVAL»(ref-289762-S08372555642008070700000) ) OK: Go to Next Step
CHECK HARNESS AND CONNECTOR (HEADLIGHT DIMMER SWITCH - MAIN BODY ECU, BODY GROUND) Disconnect the C11 headlight dimmer switch connector. Disconnect the 2S main body ECU connector. Measure the resistance according to the value (s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition C11-18 (T) - 2S-9 Always Below 1 ohms C11-12 (EL) - Body ground Always Below 1 ohms Reconnect the main body ECU connector. Reconnect the headlight dimmer switch connector. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to Next Step
CHECK HARNESS AND CONNECTOR (BATTERY - MAIN BODY ECU) Disconnect the 2G main body ECU connector. Measure the voltage according to the value (s) in the table below. Standard voltage VOLTAGE SPECIFICATION Tester Connection Condition Specified Condition 2G-1 - Body ground Always 11 to 14 V Reconnect the main body ECU connector. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE MAIN BODY ECU
INSPECT BULB (FRONT PARKING LIGHT BULB) Remove the front parking lights Apply battery voltage to the terminals and check that the front parking light illuminates. OK MEASUREMENT CONDITION AND SPECIFIED CONDITION Measurement Condition Specified Condition Positive battery - Terminal 1 Negative battery - Terminal 2 Front parking light illuminates Reinstall the front parking lights. NG: REPLACE BULB (See «DISASSEMBLY»(ref-289762-S30460201102008070700000) ) OK: Go to Next Step
CHECK HARNESS AND CONNECTOR (FRONT PARKING LIGHT - MAIN BODY ECU, BODY GROUND) Disconnect the A6 and A12 front parking light connectors. Disconnect the 2B main body ECU connector. Measure the resistance according to the value (s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition 2B-33 - A6-1 Always Below 1 ohms 2B-15 - A12-1 Always Below 1 ohms 2B-33 - A6-1 or Body ground Always 10 kohms or higher 2B-15 - A12-1 or Body ground Always 10 kohms or higher A6-2 - Body ground Always Below 1 ohms A12-2 - Body ground Always Below 1 ohms Reconnect the front parking light connectors. Reconnect the main body ECU connector. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE MAIN BODY ECU
INSPECT BULB (FRONT SIDE MARKER LIGHT) Remove the front side marker lights Apply battery voltage to the terminals and check that the front side marker light illuminates. OK MEASUREMENT CONDITION AND SPECIFIED CONDITION Measurement Condition Specified Condition Positive battery - Terminal 1 Negative battery - Terminal 2 Front side marker light illuminates Reinstall the front side marker lights. NG: REPLACE BULB (See «REMOVAL»(ref-289762-S41536111472008070700000) ) OK: Go to Next Step
CHECK HARNESS AND CONNECTOR (FRONT SIDE MARKER LIGHT - MAIN BODY ECU) Disconnect the A5 and A21 front side marker light connectors. Disconnect the 2B main body ECU connector. Measure the resistance according to the value (s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition 2B-15 - A5-1 Always Below 1 ohms 2B-15 - A21-1 Always Below 1 ohms 2B-15 - A5-1 or Body ground Always 10 kohms or higher 2B-15 - A21-1 or Body ground Always 10 kohms or higher A5-2 - Body ground Always Below 1 ohms A21-2 - Body ground Always Below 1 ohms Reconnect the front side marker light connectors. Reconnect the main body ECU connector. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE MAIN BODY ECU
INSPECT BULB (REAR TAILLIGHT BULB) Remove the rear combination light assembly. Apply battery voltage to the terminals and check that the taillight illuminates. OK MEASUREMENT CONDITION AND SPECIFIED CONDITION Measurement Condition Specified Condition Positive battery - Terminal 3 Negative battery - Terminal 1 Taillight illuminates Reinstall the rear combination light assembly. NG: REPLACE BULB (See «REMOVAL»(ref-289762-S15573166552008070700000) ) OK: Go to Next Step
CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT - MAIN BODY ECU, BODY GROUND) Disconnect the H5 and H6 rear combination light assembly connectors. Disconnect the 2A main body ECU connector Measure the resistance according to the value (s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition 2A-10 - H6-3 Always Below 1 ohms 2A-29 - H5-3 Always Below 1 ohms 2A-10 or H6-3 - Body ground Always 10 kohms or higher 2A-29 or H5-3 - Body ground Always 10 kohms or higher H5-1 - Body ground Always Below 1 ohms H6-1 - Body ground Always Below 1 ohms Reconnect the rear combination light assembly connectors. Reconnect the main body ECU connector. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE MAIN BODY ECU
INSPECT BULB (LICENSE PLATE LIGHT BULB) Remove the license plate light assembly. Apply battery voltage to the terminals and check that the license plate light illuminates. OK MEASUREMENT CONDITION AND SPECIFIED CONDITION Measurement Condition Specified Condition Positive battery - Terminal 2 Negative battery - Terminal 1 License plate light illuminates Reinstall the license plate light assembly NG: REPLACE BULB (See «REMOVAL»(ref-289762-S01373923932008070700000) ) OK: Go to Next Step
CHECK HARNESS AND CONNECTOR (LICENSE PLATE LIGHT - MAIN BODY ECU, BODY GROUND) Disconnect the L5 and L6 license plate light assembly connectors. Disconnect the 2A main body ECU connector. Measure the resistance according to the value (s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition 2A-29 - L5-2 Always Below 1 ohms 2A-29 - L6-2 Always Below 1 ohms 2A-29 or L5-2 - Body ground Always 10 kohms or higher 2A-29 or L6-2 - Body ground Always 10 kohms or higher L5-1 - Body ground Always Below 1 ohms L6-1 - Body ground Always Below 1 ohms Reconnect the license plate light assembly connector. Reconnect the main body ECU connector. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE MAIN BODY ECU

When the stop light switch is turned on, the current flows to the stop lights to illuminate it.

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Scheme 42: WIRING DIAGRAM

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Scheme 43: INSPECTION PROCEDURE

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INSPECT FUSE (STOP) Remove the STOP fuse from the main body ECU. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition STOP fuse Always Below 1 ohms Reinstall the STOP fuse. NG: REPLACE FUSE (See «PARTS LOCATION»(ref-289762-S34220633722008070700000) ) OK: Go to Next Step
INSPECT BULB (REAR STOP LIGHT BULB) Remove the rear combination light assembly. Remove the high mounted stop light assembly. Apply battery voltage to the terminals and check that the rear stop light and high mounted stop light illuminates. OK: Rear Stop Light MEASUREMENT CONDITION AND SPECIFIED CONDITION Measurement Condition Specified Condition Positive battery - Terminal 4 Negative battery - Terminal 1 Rear stop light illuminates High Mounted Stop Light MEASUREMENT CONDITION AND SPECIFIED CONDITION Measurement Condition Specified Condition Positive battery - Terminal 1 Negative battery - Terminal 2 High mounted stop light illuminates Reinstall the rear combination light assembly. Reinstall the high mounted stop light assembly. Result RESULT REFERENCE Result Proceed to OK A NG (Rear stop light) B NG (High mounted stop light) C B: REPLACE BULB (See «REMOVAL»(ref-289762-S15573166552008070700000) ) C: REPLACE BULB (See «REMOVAL»(ref-289762-S07792667882008070700000) ) A: Go to Next Step
INSPECT STOP LIGHT SWITCH Remove the stop light switch. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Switch Condition Specified Condition 1 - 2 Switch pin released Below 1 ohms 1 - 2 Switch pin pushed in 10 kohms or higher Reinstall the stop light switch. NG: REPLACE STOP LIGHT SWITCH (See «REMOVAL»(ref-289762-S02402002002008070700000) ) OK: Go to Next Step
CHECK HARNESS AND CONNECTOR (STOP FUSE - STOP LIGHT SWITCH) Disconnect the A1 stop light switch connector. Measure the voltage according to the value(s) in the table below. Standard voltage VOLTAGE SPECIFICATION Tester Connection Condition Specified Condition A1-2 - Body Ground Always 11 to 14 V Reconnect the stop light switch connector. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to Next Step
CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH - REAR STOP LIGHT) Disconnect the A1 stop light switch connector. Disconnect the H5 and H6 rear combination light assembly connectors. Disconnect the K1 high mounted stop light assembly connector. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition A1-1 - H5-4 Always Below 1 ohms A1-1 - H6-4 Always Below 1 ohms A1-1 - K1-1 Always Below 1 ohms A1-1 or H5-4 - Body ground Always 10 kohms or higher A1-1 or H6-4 - Body ground Always 10 kohms or higher A1-1 or K1-1 - Body ground Always 10 kohms or higher Reconnect the stop light switch connector. Reconnect the rear combination light assembly connectors. Reconnect the high mounted stop light assembly connector. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPAIR OR REPLACE HARNESS OR CONNECTOR (REAR STOP LIGHT - BODY GROUND)

for Automatic transaxle models: The park/neutral position switch turns on when the shift lever is moved into the R position, causing the back-up light to illuminate.

for Manual transaxle models: The back-up light switch turns on when the shift lever is moved into the R position, causing the back-up light to illuminate.

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Scheme 48: WIRING DIAGRAM

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Scheme 49: INSPECTION PROCEDURE

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INSPECT FUSE (ECU-IG NO. 2) Remove the ECU-IG NO. 2 fuse from the main body ECU. Measure the resistance according to the value(s) in the table below Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition ECU-IG NO. 2 fuse Always Below 1 ohms Reinstall the ECU-IG NO 2 fuse. NG: REPLACE FUSE (See «PARTS LOCATION»(ref-289762-S34220633722008070700000) ) OK: Go to Next Step
INSPECT BULB (BACK-UP LIGHT BULB) Remove the back-up light assembly. Apply battery voltage to the terminals and check that the back-up light illuminates. OK MEASUREMENT CONDITION AND SPECIFIED CONDITION Measurement Condition Specified Condition Positive battery - Terminal 2 Negative battery - Terminal 1 Back-up light illuminates Reinstall the rear combination light assembly. NG NG: REPLACE BULB (See «REMOVAL»(ref-289762-S17882717992008070700000) ) OK: Go to Next Step
CHECK TRANSAXLE TYPE Result RESULT REFERENCE Transaxle Type Proceed to Automatic Transaxle A Manual Transaxle B B: Go to step 7 A: Go to Next Step
INSPECT PARK / NEUTRAL POSITION SWITCH Disconnect the B16 park / neutral position switch connector. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Switch Condition Specified Condition 2 (RB) - 1 (RL) R Below 1 ohms 2 (RB) - 1 (RL) Except R 10 kohms or higher Reconnect the park / neutral position switch connector. NG: REPLACE PARK/NEUTRAL POSITION SWITCH (See «REMOVAL»(ref-289742-S11363899402008070700000) ) OK: Go to Next Step
CHECK HARNESS AND CONNECTOR (ECU-IG NO. 2 FUSE - PARK/NEUTRAL POSITION SWITCH) Disconnect the C20 park / neutral position switch connector. Measure the voltage according to the value(s) in the table below. Standard voltage VOLTAGE SPECIFICATION Tester Connection Switch Condition Specified Condition B16-2(RB)-Body ground Ignition switch ON 11 to 14 V Disconnect the park / neutral position switch connector. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to Next Step
CHECK HARNESS AND CONNECTOR (PARK / NEUTRAL POSITION SWITCH - BACK-UP LIGHT ASSEMBLY) Disconnect the B16 park/neutral position switch connector. Disconnect the H7 back-up light assembly connector. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition B16-1 (RL) - H7-2 Always Below 1 ohms B16-1 (RL) or H7-2 - Body ground Always 10 kohms or higher Disconnect the park / neutral position switch connector. Reconnect the back-up light assembly connector. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPAIR OR REPLACE HARNESS OR CONNECTOR (BACK-UP LIGHT ASSEMBLY - BODY GROUND)
INSPECT BACK-UP LIGHT SWITCH Disconnect the B5 back-up light switch connector. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Switch Condition Specified Condition 1 - 2 R Below 1 ohms 1 - 2 Except R 10 kohms or higher Reconnect the back-up light switch connector. NG NG: REPLACE BACK-UP LIGHT SWITCH (See «DISASSEMBLY»(ref-289741-S03347860232008070700000) ) OK: Go to Next Step
CHECK HARNESS AND CONNECTOR (ECU IG NO. 2 FUSE - BACK-UP LIGHT SWITCH) Disconnect the B5 back-up light switch connector. Measure the voltage according to the value(s) in the table below. Standard voltage VOLTAGE SPECIFICATION Tester Connection Switch Condition Specified Condition B5-2 - Body ground Ignition switch ON 11 to 14 V Reconnect the back-up light switch connector. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to Next Step
CHECK HARNESS AND CONNECTOR (BACK-UP LIGHT SWITCH - BACK-UP LIGHT ASSEMBLY) Disconnect the B5 back-up light switch connector. Disconnect the H7 back-up light assembly connector. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition B5-1 - H7-2 Always Below 1 ohms B5-1 or H7-2 - Body ground Always 10 kohms or higher Reconnect the back-up light switch connector. Reconnect the back-up light assembly connector. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPAIR OR REPLACE HARNESS OR CONNECTOR (BACK-UP LIGHT ASSEMBLY - BODY GROUND)

The headlights are illuminated when the light control switch, located on the headlight dimmer switch, is turned to the HEAD position.

Scheme 57

Scheme 57: WIRING DIAGRAM

Scheme 58

Scheme 58: INSPECTION PROCEDURE

Scheme 59

Scheme 60

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Scheme 67

Scheme 68

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Scheme 73

CHECK VEHICLE CONDITION Check whether the headlights illuminate. Result RESULT REFERENCE Result Proceed to Headlight does not illuminate A Low-beam headlight does not illuminate B Hi-beam headlight does not illuminate C B: Go to step 7 C: Go to step 11 A: Go to Next Step
INSPECT FUSE (H-LP MAIN) Remove the H-LP MAIN fuse from the engine room relay block. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition H-LP fuse Always Below 1 ohms Reinstall the H-LP MAIN fuse. NG: REPLACE FUSE (See «PARTS LOCATION»(ref-289762-S34220633722008070700000) ) OK: Go to Next Step
CHECK HARNESS AND CONNECTOR (BATTERY - H-LP RELAY) Remove the H-LP relay from the engine room relay block. Measure the voltage according to the value(s) in the table below. Standard voltage VOLTAGE SPECIFICATION Tester connection Condition Specified Condition H-LP relay terminal 2 - Body ground Always 11 to 14 V H-LP relay terminal 3 - Body ground Always 11 to 14 V Reinstall the H-LP relay. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to Next Step
INSPECT H-LP RELAY Remove the H-LP relay from the engine room relay block. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester connection Condition Specified Condition 3 - 5 Voltage is not applied between terminals 1 and 2 10 kohms or higher 3 - 5 Apply the battery voltage between terminals 1 and 2 Below 1 ohms Reinstall the H-LP relay. NG: REPLACE H-LP RELAY (See «PARTS LOCATION»(ref-289762-S34220633722008070700000) ) OK: Go to Next Step
INSPECT HEADLIGHT DIMMER SWITCH Remove the headlight dimmer switch assembly. Inspect the light control switch. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Switch Condition Specified Condition C11-20 (H) - C11-12 (EL) Head Below 1 ohms Inspect the headlight dimmer switch. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Switch Condition Specified Condition C11-17 (HF) - C11-12 (EL) Flash Below 1 ohms Reinstall the headlight dimmer switch assembly. NG: REPLACE HEADLIGHT DIMMER SWITCH (See «REMOVAL»(ref-289762-S08372555642008070700000) ) OK: Go to Next Step
CHECK HARNESS AND CONNECTOR (H-LP RELAY - HEADLIGHT DIMMER SWITCH) Disconnect the C11 headlight dimmer switch connector Measure the voltage according to the value(s) in the table below Standard voltage VOLTAGE SPECIFICATION Tester connection Condition Specified Condition C11-20 (H) - Body ground Always 11 to 14 V C11-17 (HF) - Body ground Always 11 to 14 V Reconnect the headlight dimmer switch connector. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPAIR OR REPLACE HARNESS OR CONNECTOR (HEADLIGHT DIMMER SWITCH - BODY GROUND)
INSPECT FUSE (H-LP LH LO, H-LP RH LO) Remove the H-LP LH LO and H-LP RH LO fuses from the engine room relay block. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition H-LP LH LO fuse Always Below 1 ohms H-LP RH LO fuse Always Below 1 ohms Reinstall the H-LP LH LO and H-LP RH LO fuses. NG NG: REPLACE FUSE (See «PARTS LOCATION»(ref-289762-S34220633722008070700000) ) OK: Go to Next Step
INSPECT BULB (LOW-BEAM) Remove the headlight (Low-beam). Apply battery voltage to the terminals and check that the headlight illuminates. OK: Go to Next Step MEASUREMENT CONDITION AND SPECIFIED CONDITION Measurement Condition Specified Condition Positive battery - 2 Negative battery - 1 Headlight illuminates (Low-beam) Reinstall the headlight (Low-beam). NG: REPLACE BULB (See «REMOVAL»(ref-289762-S41536111472008070700000) ) OK: Go to Next Step
CHECK HARNESS AND CONNECTOR (H-LP RELAY - H-LP LH LO, H-LP RH LO FUSE) Remove the H-LP relay from the engine room relay block. Remove the H-LP LH LO and H-LP RH LO fuses from the engine room relay block. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition H-LP relay terminal 5 -H-LP LH LO fuse terminal 1 Always Below 1 ohms H-LP relay terminal 5 - H-LP LH LO fuse terminal 1 Always Below 1 ohms Reinstall the H-LP LH LO and H-LP RH LO fuses. Reinstall the H-LP relay. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to Next Step
CHECK HARNESS AND CONNECTOR (H-LP LH LO AND H-LP RH LO FUSE - HEADLIGHT (LOW-BEAM)) Disconnect the A27 and A28 headlight (Low-beam) connectors. Measure the voltage according to the value(s) in the table below. Standard voltage VOLTAGE SPECIFICATION Tester connection Switch Condition Specified Condition A27-2 Body ground Light control switch Head 11 to 14 V A28-2 Body ground Light control switch Head 11 to 14 V Reconnect the headlight (Low-beam) connectors. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPAIR OR REPLACE HARNESS OR CONNECTOR (HEADLIGHT (LOW-BEAM) - BODY GROUND)
INSPECT FUSE (H-LP LH HI, H-LP RH HI) Remove the H-LP LH HI and H-LP RH HI fuses from the engine room relay block. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition H-LP LH HI fuse Always Below 1 ohms H-LP RH HI fuse Always Below 1 ohms Reinstall the H-LP LH HI and H-LP RH HI fuses. NG: REPLACE FUSE (See «PARTS LOCATION»(ref-289762-S34220633722008070700000) ) OK: Go to Next Step
INSPECT BULB (HI-BEAM) Remove the headlight (Hi-beam). Apply battery voltage to the terminals and check that the headlight illuminates. OK MEASUREMENT CONDITION AND SPECIFIED CONDITION Measurement Condition Specified Condition Positive battery - 2 Negative battery - 1 Headlight illuminates (Hi-beam) Reinstall the headlight (Hi-beam). NG: REPLACE BULB (See «REMOVAL»(ref-289762-S41536111472008070700000) ) OK: Go to Next Step
INSPECT HEADLIGHT (SYSTEM VOLTAGE) Disconnect the A25 and A26 headlight (Hi-beam) connectors. Measure the voltage according to the value(s) in the table below. Standard voltage VOLTAGE SPECIFICATION Tester connection Switch Condition Specified Condition A25-2 Body ground Light control switch Head Headlight dimmer switch High 11 to 14 V A26-2 Body ground Light control switch Head Headlight dimmer switch High 11 to 14 V Reconnect the headlight (Hi-beam) connectors. NG: Go to step 14 OK : REPAIR OR REPLACE HARNESS OR CONNECTOR (HEADLIGHT (HI) - BODY GROUND)
CHECK HARNESS AND CONNECTOR (DIMMER RELAY - H-LP RELAY, H-LP LH HI AND H-LP RH HI FUSE) Remove the DIMMER and H-LP relay from the engine room relay block. Remove the H-LP LH HI and H-LP RH HI fuses from the engine room relay block. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition H-LP relay terminal 5 -DIMMER relay terminal 1 Always Below 1 ohms H-LP relay terminal 5 -DIMMER relay terminal 3 Always Below 1 ohms DIMMER relay terminal 5 - H-LP LH HI fuse terminal 1 Always Below 1 ohms DIMMER relay terminal 5 - H-LP RH HI fuse terminal 1 Always Below 1 ohms Reinstall the H-LP LH HI and H-LP RH HI fuses. Reinstall the DIMMER relay. Reinstall the H-LP relay. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to Next Step
INSPECT DIMMER RELAY Remove the DIMMER relay from the engine room relay block Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester connection Condition Specified Condition 3 - 5 Voltage is not applied between terminals 1 and 2 10 kohms or higher 3 - 5 Apply the battery voltage between terminals 1 and 2 Below 1 ohms Reinstall the DIMMER relay. NG: REPLACE DIMMER RELAY (See «PARTS LOCATION»(ref-289762-S34220633722008070700000) ) OK: Go to Next Step
CHECK HARNESS AND CONNECTOR (H-LP LH HI AND H-LP RH HI FUSE - HEADLIGHT (HI-BEAM)) Remove the H-LP LH HI and H-LP RH HI fuses from the engine room relay block. Disconnect the A25 and A26 headlight assembly connectors. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester connection Condition Specified Condition H-LP LH HI fuse terminal 2 -A25-2 Always Below 1 ohms H-LP LH HI fuse terminal 2 - A26-2 Always Below 1 ohms Reinstall the H-LP LH HI and H-LP RH HI fuses. Reconnect the headlight (Hi-beam) connectors. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to Next Step
INSPECT HEADLIGHT DIMMER SWITCH Remove the headlight dimmer switch assembly. Inspect the headlight dimmer switch. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Switch Condition Specified Condition C11-11 (HU) - C11-12 (EL) Headlight dimmer switch High Below 1 ohms Reinstall the headlight dimmer switch. NG NG: REPLACE HEADLIGHT DIMMER SWITCH (See «REMOVAL»(ref-289762-S08372555642008070700000) ) OK: Go to Next Step
CHECK HARNESS AND CONNECTOR (HEADLIGHT DIMMER SWITCH - BODY GROUND) Disconnect the C11 headlight dimmer switch connector. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester connection Switch Condition Specified Condition C11-12 (EL) - Body ground Always Below 1 ohms Reconnect the headlight dimmer switch connector. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPAIR OR REPLACE HARNESS OR CONNECTOR (DIMMER RELAY - HEADLIGHT DIMMER SWITCH)

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

HINT

The main body ECU receives door courtesy light switch signals to control the illuminated entry system.
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 74

Scheme 74: WIRING DIAGRAM

Scheme 75

Scheme 75: INSPECTION PROCEDURE

READ VALUE USING INTELLIGENT TESTER Operate the intelligent tester or Techstream according to the display and select the "DATA LIST" or "Data List". OK: Normal conditions listed above are displayed. Intelligent Tester Main Body (Main Body ECU) DATA LIST - MAIN BODY (MAIN BODY ECU) Tester Display Measurement Item/Range Normal Condition Diagnostic Note D DOR CTY SW Driver side door courtesy light switch signal / ON or OFF ON: Driver side door is open OFF: Driver side door is closed - P DOR CTY SW Front passenger side door courtesy light switch signal / ON or OFF ON: Front passenger side door is open OFF: Front passenger side door is closed - RR DOR CTY SW Rear door courtesy light switch RH signal / ON or OFF ON: Rear door RH is open OFF: Rear door RH is closed - RL DOR CTY SW Rear door courtesy light switch LH signal / ON or OFF ON: Rear door LH is open OFF: Rear door LH is closed - BK DOR CTY SW Back door courtesy switch signal / ON or OFF ON: Back door is open OFF: Back door is closed - Techstream Main Body (Main Body ECU) DATA LIST - MAIN BODY (MAIN BODY ECU) 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 Front passenger side door courtesy light 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 light 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 light switch LH signal / ON or OFF ON: Rear door LH is open OFF: Rear door LH is closed - Back Courtesy SW Back door courtesy switch signal/ON or OFF ON: Back door is open OFF: Back door is closed - NG: Go to step 2 OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»(ref-289762-S33236642092008070700000).
INSPECT DOOR COURTESY LIGHT SWITCH ASSEMBLY Inspect the front door courtesy light switch (See «INSPECTION»(ref-289762-S34368509612008070700000) ), rear door courtesy light switch (See «INSTALLATION»(ref-289762-S42698620652008070700000) ), luggage compartment door courtesy switch (See «INSTALLATION»(ref-289762-S42698620652008070700000) ) OK: Door courtesy switches are normal. Result RESULT REFERENCE Result Proceed to OK A NG (Front door courtesy light switch) B NG (Rear door courtesy light switch) C NG (Back door courtesy switch) D B: REPLACE FRONT DOOR COURTESY LIGHT SWITCH (See «REMOVAL»(ref-289762-S20463811592008070700000) ) C: REPLACE REAR DOOR COURTESY LIGHT SWITCH (See «REMOVAL»(ref-289762-S39688907302008070700000) ) D: REPLACE BACK DOOR COURTESY SWITCH (See «INSTALLATION»(ref-289762-S42698620652008070700000) ) A: Go to Next Step
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - DOOR COURTESY SWITCH) Disconnect the 2A, 2E and C45 main body ECU connectors. Disconnect each door courtesy light switch connector Disconnect the L3 back door lock assembly connector Measure the resistance according to the value(s) in the table below. Standard resistance: Front LH side RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition 2A-21 (DCTY) - H1-1 Always Below 1 ohms H1-1 - Body ground Always 10 kohms or higher Front RH side RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition 2E-20 (PCTY) - I1-1 Always Below 1 ohms I1-1 - Body ground Always 10 kohms or higher Rear LH side RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition C45-13 (LCTY) - H3-1 Always Below 1 ohms H3-1 - Body ground Always 10 kohms or higher Rear RH side RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition 2E-19 (RCTY) - I3-1 Always Below 1 ohms I3-1 - Body ground Always 10 kohms or higher Back door RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition 2A-7 (BCTY) - L3-3 Always Below 1 ohms L3-3 - Body ground Always 10 kohms or higher L3-1 - Body ground Always Below 1 ohms Reconnect the main body ECU connector. Reconnect each door courtesy light switch connector. Reconnect the back door lock assembly connector. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE MAIN BODY ECU

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

Scheme 76

Scheme 76: WIRING DIAGRAM

Scheme 77

Scheme 77: INSPECTION PROCEDURE

Scheme 78

Scheme 79

INSPECT FUSE (DOME) Remove the DOME fuse from the engine room relay block. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition DOOM fuse Always Below 1 ohms Reinstall the DOME fuse. NG: REPLACE FUSE (See «PARTS LOCATION»(ref-289762-S34220633722008070700000) ) OK: Go to Next Step
INSPECT ROOM LIGHT ASSEMBLY Remove the room light assembly. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFICATION Tester Connection Switch Condition Specified Condition A-2 A-3 OFF 10 kohms or higher A-2 DOOR Below 1 ohms A-3 ON Below 1 ohms Remove the room light assembly. OK TESTER CONNECTION AND SPECIFIED CONDITION Tester Connection Switch Condition Specified Condition Positive battery - 1 Negative battery - 2 DOOR Room light illuminate Positive battery - 1 Negative battery - 3 ON Room light illuminate Reinstall the room light assembly. NG: REPLACE ROOM LIGHT ASSEMBLY (See «REMOVAL»(ref-289762-S07515944462008070700000) ) OK: Go to Next Step
CHECK HARNESS AND CONNECTOR (BATTERY - ROOM LIGHT ASSEMBLY AND MAIN BODY ECU) Disconnect the 2K main body ECU connector. Measure the voltage according to the value(s) in the table below. Standard voltage VOLTAGE SPECIFICATION Tester Connection Switch Condition Specified Condition 2K-2 (ILE) - Body ground Room light switch is in the DOOR position 11 to 14 V 2K-1 (GND1) - Body ground Room light switch is in the ON position 11 to 14 V Reconnect the main body ECU connector. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: PROCEED TO CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»(ref-289762-S33236642092008070700000).

Scheme 80

Scheme 80: COMPONENTS

Scheme 81

Lighting: Overview Scion xB II