Seat: Overview Lexus SC II рестайлинг

SYSTEM DESCRIPTION

1. FRONT POWER SEAT CONTROL SYSTEM DESCRIPTION The power seat is standard equipment for the front seats. A memory system is provided for the front seats as standard equipment.
2. FUNCTION OF MAIN COMPONENT The following functions are available. MAIN COMPONENT FUNCTION CHART Components Function Power seat motor (slide motor) Receives signal from position control ECU, motor operates, and seat slides forward and rearward. Power seat motor (reclining motor) Receives signal from position control ECU, motor operates, and seat tilts and reclines. Power seat motor (slide motor) Receives signal from position control ECU, motor operates, and seat cushion slides. Power seat motor (front vertical motor) Receives signal from position control ECU, motor operates, and seat front vertical raises and lowers. Power seat motor (lifter motor) Receives signal from position control ECU, motor operates, and seat rear vertical raises and lowers. Lumbar support adjuster motor Receives signal from position control ECU, motor operates, and lumbar support can be adjusted. Position control sensor (reclining, lifter, slide, front vertical control) Is built into each front seat adjuster and sends seat position data to position control ECU so that it can detect seat positions at all times. Front power seat switch (reclining, lifter, slide, front vertical) Based on switches operated, seat adjuster signals are input into position control ECU and seat is adjusted accordingly. Lumbar front power seat switch Based on switches operated, seat adjuster signals are input into position control ECU and seat is adjusted accordingly. Seat memory switch (set switch, memory switch) When set switch and memory switch are pressed simultaneously, SET, 1 or 2 switch is input to multiplex network door ECU front and seat position is recorded. Then, when memory switch is pressed, SET, 1 or 2 switch is input to multiplex network door ECU front and seat position changes according to memory.
3. SYSTEM OPERATION The front power seat's adjustment and position memory are shown in the chart below. SEAT ADJUSTMENT FUNCTION CHART Seat Adjustment Function Driver Passenger Fore-and-Aft Slide Power and memory Power and memory Reclining Power and memory Power and memory Front Vertical Height Power and memory Power and memory Rear Vertical Power and memory Power and memory Lumbar Support Power Power Headrest Fore-and-Aft Manual Manual For the memory function, first, memory switch operation is transferred from the multiplex network door ECU front to the position control ECU via the multiplex communication line. Then, either the seat position is recorded in memory or a previously recorded seat position is recalled.

DESCRIPTION

Signals of the front power switch are monitored by the position control ECU. The ECU then activates the driver and front passenger side motors.

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Scheme 11

1. INSPECT FUSE (D P/SEAT, P P/SEAT, MPX-IG, MPX-B1, D/C CUT, AM1) Remove the D P/SEAT MPX-IG and AM1 fuses from the driver side junction block. Remove the P P/SEAT and MPX-B1 fuses from the front passenger side junction block. Remove the D/C CUT fuse from the engine room No. 1 relay block. Measure the resistance of the fuses. Standard resistance: Below 1 ohms NG: REPLACE FUSE OK: Go to Next Step
2. INSPECT IGNITION RELAY NO. 1 (Scheme 1): Identifying IG1 Relay Remove the IG1 relay from the driver side junction block. Measure the resistance of the relay. Standard resistance RESISTANCE SPECIFICATION Tester Connection Specified Condition 3-5 10 kohms or higher 3-5 Below 1 ohms (when battery voltage is applied to terminals 1 and 2) NG: REPLACE IGNITION RELAY NO. 1 OK: Go to Next Step
3. CHECK FRONT POWER SEAT CONTROL FUNCTION Check that each function of the power seat operates normally by using the front power seat switches. Result: RESULT CHART Result Proceed to All front power switch operations are malfunctioning except lumbar front power seat switch operation A Only lumbar front power seat switch operation is malfunctioning B B: Go to step 8 A: Go to Next Step
4. READ VALUE OF INTELLIGENT TESTER (FRONT POWER SEAT SWITCH) Check the DATA LIST for proper functioning of the front power seat switch. Position control ECU (for driver, front passenger side) DATA LIST Item Measurement Item/ Range (Display) Normal Condition Diagnostic Note RECLIN SW REAR Reclining switch signal (Rearward)/ ON or OFF ON: Reclining switch (Rearward) is ON OFF: Reclining switch (Rearward) is OFF - RECLIN SW FRONT Reclining switch signal (Forward)/ ON or OFF ON: Reclining switch (Forward) is ON OFF: Reclining switch (Forward) is OFF - F VTCL SW DOWN Front vertical switch signal (Downward)/ ON or OFF ON: Front vertical switch (Downward) is ON OFF: Front vertical switch (Downward) is OFF - F VTCL SW UP Front vertical switch signal (Upward)/ ON or OFF ON: Front vertical switch (Upward) is ON OFF: Front vertical switch (Upward) is OFF - LIFTER SW DOWN Lifter switch signal (Downward)/ ON or OFF ON: Lifter switch (Downward) is ON OFF: Lifter switch (Downward) is OFF - LIFTER SW UP Lifter switch signal (Upward)/ ON or OFF ON: Lifter switch (Upward) is ON OFF: Lifter switch (Upward) is OFF - SLIDE SW REAR Sliding switch signal (Rearward)/ ON or OFF ON: Sliding switch (Rearward) is ON OFF: Sliding switch (Rearward) is OFF - SLIDE SW FRONT Sliding switch signal (Forward)/ ON or OFF ON: Sliding switch (Forward) is ON OFF: Sliding switch (Forward) is OFF - OK: On tester screen, each item changes between ON and OFF according to above chart. NG: Go to step 6 OK: REPLACE POSITION CONTROL ECU
5. INSPECT FRONT POWER SEAT SWITCH (SLIDE SWITCH, FRONT VERTICAL SWITCH, LIFTER SWITCH, RECLINING SWITCH) Measure the resistance between the terminals when each switch is operated. Front power seat switch LH Standard resistance: Slide switch RESISTANCE SPECIFICATION Tester Connection Switch Condition Specified Condition 1 (E) - 9 (SLDF) FRONT Below 1 ohms 1 (E) - 6 (SLDR) BACK Below 1 ohms Front vertical switch RESISTANCE SPECIFICATION Tester Connection Switch Condition Specified Condition 1 (E) - 10 (FUP) UP Below 1 ohms 1 (E) - 5 (FDWN) DOWN Below 1 ohms Lifter switch RESISTANCE SPECIFICATION Tester Connection Switch Condition Specified Condition 1 (E) - 7 (LUP) UP Below 1 ohms 1 (E) - 8 (LDWN) DOWN Below 1 ohms (Scheme 2): Inspecting Front Power Seat Switch LH Reclining switch RESISTANCE SPECIFICATION Tester Connection Switch Condition Specified Condition 1 (E) - 3 (RCLF) FORWARD Below 1 ohms 1 (E) - 2 (RCLR) REAR Below 1 ohms Front power seat switch RH Standard resistance: Slide switch RESISTANCE SPECIFICATION Tester Connection Switch Condition Specified Condition 1 (E) - 9 (SLDF) FRONT Below 1 ohms 1 (E) - 6 (SLDR) BACK Below 1 ohms Front vertical switch RESISTANCE SPECIFICATION Tester Connection Switch Condition Specified Condition 1 (E) - 10 (FUP) UP Below 1 ohms 1 (E) - 5 (FDWN) DOWN Below 1 ohms Lifter switch RESISTANCE SPECIFICATION Tester Connection Switch Condition Specified Condition 1 (E) - 7 (LUP) UP Below 1 ohms 1 (E) - 8 (LDWN) DOWN Below 1 ohms Reclining switch RESISTANCE SPECIFICATION Tester Connection Switch Condition Specified Condition 1 (E) - 3 (RCLF) FORWARD Below 1 ohms 1 (E) - 2 (RCLR) REAR Below 1 ohms (Scheme 3): Inspecting Front Power Seat Switch RH NG: REPLACE FRONT POWER SEAT SWITCH OK: Go to Next Step
6. INSPECT POWER SEAT MOTOR ASSEMBLY (SLIDE MOTOR, VERTICAL MOTOR, LIFTER MOTOR, RECLINING MOTOR) Check the operation of the slide motor. Check the motor rotation when the battery is connected to the slide motor connector terminals. MEASUREMENT CONDITION AND SPECIFIED CONDITION CHART Measurement Condition Specified Condition Battery positive (+) --> 1 Battery negative (-) --> 2 Rotates smoothly counterclockwise Battery positive* (+) --> 2 Battery negative (-) --> 1 Rotates smoothly clockwise (Scheme 4): Checking Operation Of Slide Motor Check the operation of the vertical motor. Check the motor rotation when the battery is connected to the vertical motor connector terminals. OK MEASUREMENT CONDITION AND SPECIFIED CONDITION CHART Measurement Condition Specified Condition Battery positive (+) --> 1 Battery negative (-) --> 2 Rotates smoothly counterclockwise Battery positive (+) --> 2 Battery negative (-) --> 1 Rotates smoothly clockwise (Scheme 5): Checking Operation Of Vertical Motor Check the operation of the lifter motor. Check the motor rotation when the battery is connected to the lifter motor connector terminals. MEASUREMENT CONDITION AND SPECIFIED CONDITION CHART Measurement Condition Specified Condition Battery positive (+) --> 1 Battery negative (-) --> 2 Rotates smoothly counterclockwise Battery positive (+) --> 2 Battery negative (-) --> 1 Rotates smoothly clockwise (Scheme 6): Checking Operation Of Lifter Motor Check the operation of the reclining motor. (Scheme 7): Checking Operation Of Reclining Motor Check the motor rotation when the battery is connected to the reclining motor connector terminals. OK MEASUREMENT CONDITION AND SPECIFIED CONDITION CHART Measurement Condition Specified Condition Battery positive (+) --> 1 Battery negative (-) --> 2 Rotates smoothly counterclockwise Battery positive (+) --> 2 Battery negative (-) --> 1 Rotates smoothly clockwise NG: REPLACE POWER SEAT MOTOR ASSEMBLY OK: Go to Next Step
7. CHECK WIRE HARNESS (POSITION CONTROL ECU LH - BATTERY AND BODY GROUND) Disconnect the P21, P22, P23 or P24 ECU connectors. Measure the voltage of the wire harness side connectors. Standard voltage: for Driver Side VOLTAGE SPECIFICATION Tester Connection Condition Specified Condition P21-8 (IG) - Body ground Ignition switch ON 10 to 14 V P21-8 (IG) - Body ground Ignition switch OFF Below 1 V P22-8 (+B) - Body ground Always 10 to 14 V P21-9 (SYSB) - Body ground Always 10 to 14 V for Front Passenger Side VOLTAGE SPECIFICATION Tester Connection Specified Condition P24-8 (+B) - Body ground 10 to 14 V P23-9 (SYSB) - Body ground 10 to 14 V (Scheme 8): Identifying P21, P22, P23 Or P24 ECU Connectors Measure the resistance of the wire harness side connectors. Standard resistance: for Driver Side RESISTANCE SPECIFICATION Tester Connection Specified Condition P21-13 (SGND) - Body ground Below 1 ohms P22-7 (GND) - Body ground Below 1 ohms for Front Passenger Side RESISTANCE SPECIFICATION Tester Connection Specified Condition P23-13 (SGND) - Body ground Below 1 ohms P24-7 (GND) - Body ground Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE POSITION CONTROL ECU
8. CHECK WIRE HARNESS (LUMBAR FRONT POWER SEAT SWITCH - POSITION CONTROL ECU AND BODY GROUND) Disconnect the L27 or L28 switch connector. Disconnect the P22 or P24 ECU connector. (Scheme 9): Identifying L27 Or L28 Switch Connector And P22 Or P24 ECU Connector Measure the resistance of the wire harness side connectors. Standard resistance: for Driver Side RESISTANCE SPECIFICATION Tester Connection Specified Condition L27-4 (B2) - P22-8 (+B) Below 1 ohms L27-3 (E2) - Body ground Below 1 ohms for Front Passenger Side RESISTANCE SPECIFICATION Tester Connection Specified Condition L28-1 (B) - P24-8 (+B) Below 1 L28-2 (E) - Body ground Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to Next Step
9. INSPECT LUMBAR FRONT POWER SEAT SWITCH (Scheme 10): Inspecting Lumbar Front Power Seat Switch Remove the switch. Measure the resistance of the seat switch. Standard resistance: for Driver Side RESISTANCE SPECIFICATION Tester Connection Switch Condition Specified Condition 1 (LF) - 4 (B2) 2 (LR) - 3 (B2) FRONT Below 1 ohms 1 (LF) - 3 (E2) 2 (LR) - 3 (B2) OFF Below 1 ohms 1 (LF) - 3 (E2) 2 (LR) - 4 (B2) BACK Below 1 ohms for Front Passenger Side RESISTANCE SPECIFICATION Tester Connection Switch Condition Specified Condition 1 (B) - 4 (LF) 2 (E) - 3 (LR) FRONT Below 1 ohms 2 (E) - 3 (LR) 2 (E) - 4 (LF) OFF Below 1 ohms 1 (B) - 3 (LR) 2 (E) - 4 (LF) BACK Below 1 ohms NG: REPLACE LUMBAR FRONT POWER SEAT SWITCH OK: Go to Next Step
10. CHECK POWER SEAT MOTOR ASSEMBLY (LUMBAR SUPPORT ADJUSTER MOTOR) Check the operation of the lumbar support adjuster motor. (Scheme 11): Checking Operation Of Lumbar Support Adjuster Motor Check the motor rotation when the battery is connected to the lumbar support adjuster motor connector terminals. OK MEASUREMENT CONDITION AND SPECIFIED CONDITION CHART Measurement Condition Specified Condition Battery positive (+) --> 1 Battery negative (-) --> 2 Rotates smoothly clockwise Battery positive (+) --> 2 Battery negative (-) --> 1 Rotates smoothly counterclockwise NG: REPLACE POWER SEAT MOTOR ASSEMBLY OK: REPAIR OR REPLACE HARNESS OR CONNECTOR

When the set button of the memory adjusting switch is pressed, the multiplex network door ECU front directs the position control ECU to memorize the value of each position sensor.

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Scheme 13

1. CHECK FRONT POWER SEAT CONTROL FUNCTION Check that each function of the power seat operates normally by using the front power seat switches. OK: Each function of power seat operates normally by using seat switches. NG: GO TO «PROBLEM SYMPTOMS TABLE»(ref-283167-S16145808552008041900000) OK: Go to Next Step
2. CHECK SEAT MEMORY SWITCH FUNCTION (SEAT MEMORY FUNCTION) Correctly perform a memorizing operation, and then check whether the memory functions normally or the buzzer sounds to indicate that the memorizing operation has been completed. NOTE: The memory does not function when the SET, M1 and M2 switches are simultaneously pressed. If a memorizing operation has failed, release all switches. The seat memory function does not operate unless the switches are released. OK: NORMAL NG: Go to Next Step
3. READ VALUE OF INTELLIGENT TESTER (SEAT MEMORY SWITCH) Check the DATA LIST for proper functioning of the front power seat switch, seat memory switch, unlock warning switch, front door courtesy light switch (for driver side), ignition switch and PNP switch. Position control ECU (for driver, front passenger side): DATA LIST item Measurement Item/ Range (Display) Normal Condition Diagnostic Note M2SW Seat memory switch M2 signal/ ON or OFF ON: Seat memory switch M2 is ON OFF: Seat memory switch M2 is OFF - M1 SW Seat memory switch M1 signal/ ON or OFF ON: Seat memory switch M1 is ON OFF: Seat memory switch M1 is OFF - SETSW Seat memory set switch signal/ ON or OFF ON: Memory set switch is ON OFF: Memory set switch is OFF - MEM M1 SW Driving position memorized with seat memory switch M1/ MEM or NOT MEM MEM: Memorized NOT MEM: Not memorized - MEM M2 SW Driving position memorized with seat memory switch M2/ MEM or NOT MEM MEM: Memorized NOT MEM: Not memorized - SEAT MEM M1 Seat position memorized with seat memory switch M1/ MEM or NOT MEM MEM: Memorized NOT MEM: Not memorized - SEAT MEM M2 Seat position memorized with seat memory switch M2/ MEM or NOT MEM MEM: Memorized NOT MEM: Not memorized - OK: On tester screen, each item changes between ON, OFF and MEM and NOT MEM according to above chart. OK: REPLACE POSITION CONTROL ECU NG: Go to Next Step
4. INSPECT SEAT MEMORY SWITCH (Scheme 12): Inspecting Seat Memory Switch Measure the resistance of the switch. Standard resistance RESISTANCE SPECIFICATION Tester Connection Switch Condition Specified Condition 1-3 M1 switch pressed Below 1 ohms 1-4 M2 switch pressed Below 1 ohms 1-2 SET switch pressed Below 1 ohms NG: REPLACE SEAT MEMORY SWITCH OK: Go to Next Step
5. CHECK WIRE HARNESS (SEAT MEMORY SWITCH - MULTIPLEX NETWORK DOOR ECU FRONT [DOOR ECU]) Disconnect the D20 or S29 switch connector. Disconnect the D18 or P10 ECU connector. (Scheme 13): Identifying D20 Or S29 Switch Connector And D18 Or P10 ECU Connector Measure the resistance of the wire harness side connectors. Standard resistance: for Driver Side RESISTANCE SPECIFICATION Tester Connection Specified Condition D20-3 (M1) - D18-16 (M1) Below 1 ohms D20-4 (M2) - D18-15 (M2) Below 1 ohms D20-2 (MRY) - D18-24 (MM) Below 1 ohms D20-1 (E) - D18-23 (MSWE) Below 1 ohms for Front Passenger Side RESISTANCE SPECIFICATION Tester Connection Specified Condition S29-3 (M1) - P10-16 (M1) Below 1 ohms S29-4 (M2) - P10-15 (M2) Below 1 ohms S29-2 (MRY) - P10-24 (MM) Below 1 ohms S29-1 (E) - P10-23 (MSWE) Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to Next Step
6. REPLACE MULTIPLEX NETWORK DOOR ECU FRONT (DOOR ECU) After replacing the multiplex network door ECU front, check that the front power seat control functions operate normally using the front seat switches and seat memory switch. NG: REPLACE SEAT MEMORY SWITCH OK: END (MULTIPLEX NETWORK DOOR ECU FRONT IS DEFECTIVE)

When the memory adjusting switches M1 and M2 are pressed, the multiplex network door ECU front LH and RH (driver and front passenger door ECU) direct the position control ECU to drive each motor unit until the seat reaches the memorized position.

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Scheme 15

1. CHECK FRONT POWER SEAT CONTROL FUNCTION Check that each function of the power seat operates normally by using the front power seat switches. OK: Each function of power seat operates normally by using seat switches. NG: GO TO «PROBLEM SYMPTOMS TABLE»(ref-283167-S16145808552008041900000) OK: Go to Next Step
2. CHECK SEAT MEMORY SWITCH FUNCTION (SEAT MEMORY SWITCH FUNCTION) Correctly perform a memorizing operation, and then check whether the memory functions normally or the buzzer sounds to indicate that the memorizing operation has been completed. NOTE: The memory does not function when the SET, M1 and M2 switches are simultaneously pressed. If a memorizing operation has failed, release all switches. The seat memory function does not operate unless the switches are released. NG: GO TO «PROBLEM SYMPTOMS TABLE»(ref-283167-S16145808552008041900000) OK: Go to Next Step
3. CHECK FRONT POWER SEAT CONTROL FUNCTION (REPRODUCING OPERATION) Check whether the reproducing operation works under any of the following conditions. The ignition switch is ON and the shift lever is on P. The ignition switch is ON, the shift lever is on N and the vehicle is stopped. The driver side door is open and no key is inserted in the ignition switch. Result: RESULT CHART Result Proceed to Reproducing operation does not work for all conditions. A Reproducing operation works for all conditions. B B: GO TO «COMBINATION METER»(ref-283180-S32187046362008041900000) A: Go to Next Step
4. READ VALUE OF INTELLIGENT TESTER Check the DATA LIST for proper functioning of the seat memory switch, unlock warning switch, front door courtesy light switch (for driver side), ignition switch and PNP switch. Position control ECU (for driver, front passenger side) DATA LIST Item Measurement Item/ Range (Display) Normal Condition Diagnostic Note VEHICLE SPD Vehicle speed/ MIN: 0 km/h MAX: 255 km/h Actual vehicle speed - IGSW Ignition switch status/ ON or OFF ON: Ignition switch in ON OFF: Ignition switch is OFF - KEY UNLOCK SW Key unlock warning switch signal ON or OFF ON: Key is in ignition key cylinder OFF: Key is not in ignition key cylinder - D-DOOR WARN SW Door courtesy switch signal/ ON or OFF ON: Driver side door is open OFF: Driver side door is closed - PNPSW Shift lever position P signal/ ON or OFF ON: Shift lever in P position OFF: Shift lever in any position except P - M2SW Seat memory switch M2 signal ON or OFF ON: Memory set switch M2 is ON OFF: Memory set switch M2 is OFF - M1 SW Seat memory switch M1 signal/ ON or OFF ON: Memory set switch M1 is ON OFF: Memory set switch M1 is OFF - SETSW Seat memory set switch signal/ ON or OFF ON: Memory set switch is ON OFF: Memory set switch is OFF - MEM M1 SW Driving position memorized with seat memory switch M1/ MEM or NOT MEM MEM: Memorized NOT MEM: Not memorized - MEM M2 SW Driving position memorized with seat memory switch M2/ MEM or NOT MEM MEM: Memorized NOT MEM: Not memorized - SEAT MEM M1 Seat position memorized with seat memory switch M1 MEM or NOT MEM MEM: Memorized NOT MEM: Not memorized - SEAT MEM M2 Seat position memorized with seat memory switch M2 MEM or NOT MEM MEM: Memorized NOT MEM: Not memorized - Result: RESULT CHART Result Speed to Item of seat memory switch is malfunctioning A All items are normal B Item of PNP switch, ignition switch, front door courtesy light switch or vehicle speed sensor is malfunctioning C B: REPLACE POSITION CONTROL ECU C: GO TO «COMBINATION METER»(ref-283180-S32187046362008041900000) A: Go to Next Step
5. CHECK FRONT SEAT ADJUSTER SUB-ASSEMBLY OUTER (POSITION CONTROL SENSOR) Turn the ignition switch ON. Measure the voltage of the ECU connector. Standard voltage: for Driver Side VOLTAGE SPECIFICATION Tester Connection Specified Condition P21-3 (SSFV) - P21-13 (SGND) Varies between 0 to 8 V P21-4 (SSFV) - P21-13 (SGND) Varies between 0 to 8 V P21-5 (SSFV) - P21-13 (SGND) Varies between 0 to 8 V P21-14 (SSFV) - P21-13 (SGND) Varies between 0 to 8 V for Front Passenger Side VOLTAGE SPECIFICATION Tester Connection Specified Condition P23-3 (SSFV) - P23-13 (SGND) Varies between 0 to 8 V P23-4 (SSRV) - P23-13 (SGND) Varies between 0 to 8 V P23-5 (SSRR) - P23-13 (SGND) Varies between 0 to 8 V P23-14 (SSRS) - P23-13 (SGND) Varies between 0 to 8 V (Scheme 14): Identifying Front Seat Adjuster ECU Connectors Terminal HINT: Check the position control sensors that are malfunctioning. Run the motors and check that the voltage readings vary within the "Specified Condition" range shown in the chart above. NG: REPLACE FRONT SEAT ADJUSTER SUB-ASSEMBLY OUTER (POSITION CONTROL SENSOR) OK: Go to Next Step
6. CHECK WIRE HARNESS (FRONT SEAT ADJUSTER OUTER [POSITION CONTROL SENSOR] - POSITION CONTROL ECU) Disconnect the P33, P34, P35, P36, P37, P38, P39 or P40 sensor connector. Disconnect the P21 or P23 ECU connector. Measure the resistance of the wire harness side connectors. Standard resistance: for Driver Side RESISTANCE SPECIFICATION Tester Connection Specified Condition P21-3 (SSFV) - P33-1 Below 1 ohms P21-4 (SSFV) - P34-1 Below 1 ohms P21-5 (SSFV) - P35-1 Below 1 ohms P21-14 (SSFV) - P36-1 Below 1 ohms P21-6 (SSFV) - P33-3 Below 1 ohms P21-6 (SSFV) - P34-3 Below 1 ohms P21-6 (SSFV) - P35-3 Below 1 ohms P21-6 (PVCC) - P36-3 Below 1 ohms P33-2 - Body ground Below 1 ohms P34-2 - Body ground Below 1 ohms P35-2 - Body ground Below 1 ohms P36-2 - Body ground Below 1 ohms (Scheme 15): Identifying P33, P34, P35, P36, P37, P38, P39 Or P40 Sensor Connector And P21 Or P23 ECU Connector for Front Passenger Side RESISTANCE SPECIFICATION Tester Connection Specified Condition P23-3 (SSFV) - P37-1 Below 1 ohms P23-4 (SSRV) - P38-1 Below 1 ohms P23-5 (SSRR) - P39-1 Below 1 ohms P23-14 (SSRS) - P40-1 Below 1 ohms P23-6 (PVCC) - P37-3 Below 1 ohms P23-6 (PVCC) - P38-3 Below 1 ohms P23-6 (PVCC) - P39-3 Below 1 ohms P23-6 (PVCC) - P40-3 Below 1 ohms P37-2 - Body ground Below 1 ohms P38-2 - Body ground Below 1 ohms P39-2 - Body ground Below 1 ohms P40-2 - Body ground Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE FRONT SEAT ADJUSTER SUB-ASSEMBLY OUTER (POSITION CONTROL SENSOR)

1. GENERAL By operating the dial-type seat heater control switch, which is located in the console box, the temperature can be controlled steplessly within the range of 30 to 40°C (86 to 104°F). Whether the seat heater is ON or OFF can be determined by the seat heater control switch indicator light ON or OFF status. The seat heater of both seats are controlled by the seat heater ECU, which is located above the respective seat ECU.