POWER CONTROL SYSTEM SECTION PCS CONTENTS ELECTRICAL & POWER CONTROL PCS-1 IPDM E/R SYSTEM DESCRIPTION... 2 ECU DIAGNOSIS INFORMATION...

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1 TR & WR TR ST S WR TR SYSTM TTS M /R SYSTM SRT... 2 RY TR SYSTM... 2 System iagram...2 System escription...3 omponent arts ocation...4 WR TR SYSTM... 5 System iagram...5 System escription...5 S UR SYSTM... 6 System iagram...6 System escription...6 WR SUMT TR SYS- TM... 7 System iagram...7 System escription...7 omponent arts ocation...8 SS SYSTM (M /R)... 9 iagnosis escription...9 SUT unction (M /R)...11 T/RUT SS...13 U1000 MM RUT...13 escription...13 T ogic...13 iagnosis rocedure...13 WR SUY RU RUT...14 iagnosis rocedure...14 U SS RMT...15 M /R (TT WR STR- UT MU RM)...15 Reference Value...15 Terminal ayout...16 hysical Values...17 ail Safe...20 T ndex...21 WR RM...22 M /R (TT WR STR- UT MU RM)...22 Wiring iagram...22 RUT...27 RUTS...27 recaution for Supplemental Restraint System (SRS) "R " and "ST T R-T- SR"...27 RMV STT...28 M /R (TT WR STR- UT MU RM)...28 Removal and nstallation of M /R...28 S S-1

2 SYSTM SRT RY TR SYSTM System iagram RY TR SYSTM : M0743 S-2

3 System escription RY TR SYSTM : M /R activates the internal control circuit to perform the relay - control according to the input signals from various sensors and the request signals received from control units via communication. UT: M /R integrated relays cannot be removed. ontrol relay nput/output Transmit unit ontrol part ront fog lamp relay eadlamp high relay eadlamp low relay ront fog lamp request signal igh beam request signal ow beam request signal M () M () Tail lamp relay osition light request signal M () ront wiper relay ront wiper high relay Rear window defogger relay / relay Starter relay ooling fan relays eated mirror relay ront fog lamps eadlamp high eadlamp low arking lamps icense plate lamps Tail lamps Trailer tow relay llumination system Reference page X-48 X-10 X-42 X-50 ront wiper request signal M () ront wiper motor WW-48 Rear window defogger request signal / request signal gnition switch STRT signal ooling fan request signal eated mirror request signal M () M () M () TM (/T) lutch interlock (M/T) M () M () Rear window defogger / compressor Starter motor ooling fan relay oor mirrors M relay M relay control signal M () M relay Throttle control motor relay Throttle control motor control signal M () Throttle control motor relay STR-11 (/T) STR-12 (M/T with clutch interlock cancel system) STR-14 (M/T without clutch interlock cancel system) -506 (or (or Mexico) (QR25) Mexico -33 (QR25) Mexico) S S-3

4 RY TR SYSTM ontrol relay nput/output Transmit unit ontrol part uel pump relay uel pump request signal M () uel pump gnition relay gnition switch signal gnition switch gnition relay omponent arts ocation Reference page -452 (QR25) Mexico) -456 (QR25) Mexico) : WM0532ZZ 1. M /R 118, 119, 120, 121, 122, 123, 124 S-4

5 WR TR SYSTM System iagram WR TR SYSTM : WM0527 System escription : TR M /R controls the cooling fan according to the status of the cooling fan speed request signal received from M via communication. Refer to -4, "System escription". S S-5

6 S UR SYSTM System iagram S UR SYSTM : M0263 System escription : UT M has the signal transmission function that outputs/transmits each input/received signal to each unit. Signal transmission function list Signal name nput utput escription il pressure switch signal M /R () ombination meter () Transmits the received oil pressure switch signal via communication. S-6

7 WR SUMT TR SYSTM WR SUMT TR SYSTM System iagram : WM1529 System escription : UT M incorporates a power consumption control function that reduces the power consumption according to the vehicle status. M switches the status (control mode) by itself with the power saving control function. t performs the sleep request to each unit (M /R and combination meter) that operates with the ignition switch. ormal mode (wake-up) - communication is normally performed with other units - ach control with M is operating properly communication sleep mode ( sleep) - transmission is stopped - ontrol with M only is operating ow power consumption mode (M sleep) - ow power consumption control is active - transmission is stopped W WR SUMT TR WT M M reduces the power consumption with the following operation in the low power consumption mode. The reading interval of the each switches changes from 10 ms interval to 20 ms interval. Sleep mode activation M receives the sleep-ready signal (ready) from M /R and combination meter via communication. M transmits the sleep wake up signal (sleep) to each unit when all of the sleep conditions are fulfilled. ach unit stops the transmission of communication with the sleep wake up signal. M is in communication sleep mode. M is in the low power consumption mode and perform the low power consumption control when all of the M sleep conditions are fulfilled with sleep condition. S S-7

8 Sleep condition WR SUMT TR SYSTM sleep condition Receiving the sleep-ready signal (ready) from all units gnition switch: Vehicle security system alarm: o operation Warning lamp: o operation Warning chime: o operation Stop lamp switch: ey switch status: o change for 2 seconds azard warning lamp: o operation xterior lamp: oor lock status: o change for 2 seconds SUT communication status: o communication oor switch status: o change for 2 seconds M sleep condition The controls only M are completed. (nterior room lamp battery saver: Time out etc.) Wake-up operation M transmits sleep wake up signal (wake up) to each unit when any condition listed below is established, and then goes into normal mode from low power consumption mode. ach unit starts transmissions with communication by receiving sleep wake up signals. ach unit transmits wake up signals to M with communication to convey the start of communication. Wake-up condition omponent arts ocation M wake-up condition gnition switch: or Stop lamp switch: (epress brake pedal) ny door switch: ighting switch: 1ST or SS azard switch: Remote keyless entry receiver: Receiving (with remote keyless entry) : M0408ZZ 1. M M18, M19, M20 (view with lower instrument panel removed) 2. ombination meter M24 3. M /R S-8

9 SS SYSTM (M /R) iagnosis escription SS SYSTM (M /R) : UT TV TST escription n auto active test mode, the M /R sends a drive signal to the following systems to check their operation. il pressure low warning indicator il pressure gauge Rear window defogger ront wipers Tail, license and parking lamps ront fog lamps eadlamps (i, o) / compressor (magnetic clutch) ooling fan peration rocedure 1. lose the hood and front door R, and lift the wiper arms from the windshield (to prevent windshield damage due to wiper operation). T: When auto active test is performed with hood opened, sprinkle water on windshield before hand. 2. Turn ignition switch. 3. Turn the ignition switch and, within 20 seconds, press the front door switch 10 times. Then turn the ignition switch. 4. Turn the ignition switch within 10 seconds. fter that the horn sounds once and the auto active test starts. 5. fter a series of the following operations is repeated 3 times, auto active test is completed. T: When auto active test mode has to be cancelled halfway through test, turn ignition switch. UT: f auto active test mode cannot be actuated, check door switch system. Refer to -27, " : escription" (king cab) or -29, "RW : escription" (crew cab). o not start the engine. nspection in uto ctive Test Mode When auto active test mode is actuated, the following 7 steps are repeated 3 times. S W5030 tem umber Test tem peration Time/requency 1 Rear window defogger 10 seconds 2 ront wipers W 5 seconds then 5 seconds 3 Tail, license plate, front fog and parking lamps 10 seconds S-9