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Last Modified: 11-29-2007 |
1.6 U |
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Service Category: Vehicle Exterior |
Section: Wiper/Washer |
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Model Year: 2008 |
Model: Sequoia |
Doc ID: RM000000PJ600PX |
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Title: WIPER / WASHER: WIPER AND WASHER SYSTEM: TERMINALS OF ECU (2008 Sequoia) |
TERMINALS OF ECU
1. CHECK MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)
(a) Disconnect the DA, DB and DD main body ECU connectors.
(b) Measure the resistance and voltage according to the value(s) in the table below.
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Terminal No. (Symbol)
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Wiring Color
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Terminal Description
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Condition
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Specified Condition
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DA-1 - Body ground
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B - Body ground
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Battery power supply
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Always
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11 to 14 V
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DB-13 (BECU) - Body ground
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GR - Body ground
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Battery power supply
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Always
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11 to 14 V
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DD-62 (GND1, 2) - Body ground
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W-B - Body ground
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Ground
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Always
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Below 1 Ω
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If the result is not as specified, there may be a malfunction on the wire harness side.
(c) Reconnect the main body ECU connectors.
(d) Measure the voltage according to the value(s) in the table below.
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Terminal No. (Symbol)
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Wiring Color
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Terminal Description
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Condition
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Specified Condition
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DD-43 - DD-62 (GND1, 2)
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LG - W-B
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IG power supply
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Ignition switch off
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Below 1 V
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Ignition switch ON
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11 to 14 V
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H2-10 (LIN2) - DD-62 (GND1, 2)
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V - W-B
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LIN communication signal
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Ignition switch ON
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Signal waveform
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H2-14 (RWMR) - DD-62 (GND1, 2)
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O - W-B
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Rear washer motor operation signal
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Ignition switch ON and rear washer motor OFF
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11 to 14 V
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Ignition switch ON and rear washer motor ON
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Below 1 V
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H3-2 (RWIN) - DD-62 (GND1, 2)
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L - W-B
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Rear wiper switch signal
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Ignition switch ON and rear wiper switch OFF
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11 to 14 V
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Ignition switch ON and wiper switch LO
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Below 1 V
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H3-9 (RWON) - DD-62 (GND1, 2)
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W - W-B
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Rear wiper switch signal
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Ignition switch ON and rear wiper switch OFF
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11 to 14 V
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Ignition switch ON and rear wiper switch HI
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Below 1 V
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H4-7 (RWSW) - DD-62 (GND1, 2)
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Y - W-B
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Rear washer switch signal
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Ignition switch ON and rear washer switch OFF
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11 to 14 V
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Ignition switch ON and rear washer switch ON
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Below 1 V
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DD-23 (HRLY) - DD-62 (GND1, 2)
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SB - W-B
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Headlight LO signal
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Headlight LO switch OFF
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11 to 14 V
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Headlight LO switch ON
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Below 1 V
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DB-12 (IG) - DD-62 (GND1, 2)
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Y - W-B
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Headlight cleaner control relay IG signal
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Ignition switch off
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Below 1 V
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Ignition switch ON
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11 to 14 V
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If the result is not as specified, there may be a malfunction on the wire harness side.
2. CHECK BACK DOOR ECU
If the result is not as specified, there may be a malfunction on the wire harness side.
(a) Disconnect the V2 and V3 back door ECU connectors.
(b) Measure the resistance and voltage according to the value(s) in the table below.
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Terminal No. (Symbol)
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Wiring Color
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Terminal Description
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Condition
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Specified Condition
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V2-1 (BDR) - Body ground
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SB - Body ground
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Battery power supply
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Always
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11 to 14 V
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V2-6 (GND) - Body ground
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W-B - Body ground
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Ground
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Always
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Below 1 Ω
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V2-7 (BECU) - Body ground
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GR - Body ground
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Battery power supply
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Always
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11 to 14 V
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V2-8 (SIG) - Body ground
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Y - Body ground
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IG power supply
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Ignition switch off
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Below 1 V
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Ignition switch ON
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11 to 14 V
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V3-7 (BKUL) - V3-19 (KEYE)
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LG - O
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Tail gate control switch signal
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Back door key cylinder turned UNLOCK
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Below 1 Ω
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V3-8 (BKL) - V3-19 (KEYE)
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G - O
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Tail gate control switch signal
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Back door key cylinder turned LOCK
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Below 1 Ω
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If the result is not as specified, there may be a malfunction on the wire harness side.
(c) Reconnect the back door ECU connectors.
(d) Measure the resistance and voltage according to the value(s) in the table below.
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Terminal No. (Symbol)
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Wiring Color
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Terminal Description
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Condition
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Specified Condition
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V2-16 (MPX1) - V2-6 (GND)
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Y - W-B
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LIN communication signal
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Ignition switch ON
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Signal waveform
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V2-21 (A UP) - V2-6 (GND)
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G - W-B
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Back door power window AUTO UP signal
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Ignition switch ON and back door power window switch OFF → AUTO UP
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Below 1 V → 11 to 14 V
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V2-22 (BUP) - V2-6 (GND)
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O - W-B
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Back door power window UP signal
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Ignition switch ON and back door power window switch OFF → UP
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Below 1 V → 11 to 14 V
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V2-23 (BDN) - V2-6 (GND)
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V - W-B
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Back door power window DOWN signal
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Ignition switch ON and back door power window switch OFF → DOWN
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Below 1 V → 11 to 14 V
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V2-24 (A DN) - V2-6 (GND)
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L - W-B
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Back door power window AUTO DOWN signal
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Ignition switch ON and back door power window switch OFF → AUTO DOWN
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Below 1 V → 11 to 14 V
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V3-5 (BDUP) - V2-6 (GND)
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O - W-B
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Back door power window UP operation signal
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Ignition switch ON and back door power window switch OFF → UP
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Below 1 V → 11 to 14 V
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V3-6 (BDDN) - V2-6 (GND)
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P - W-B
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Back door power window DOWN operation signal
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Ignition switch ON and back door power window switch OFF → DOWN
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Below 1 V → 11 to 14 V
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V3-1 (WIP-) - V2-6 (GND)
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P - W-B
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Rear wiper motor operation signal
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Ignition switch ON and rear wiper switch LO or HI
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Pulse generation
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V3-2 (WIP+) - V2-6 (GND)
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L - W-B
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Rear wiper motor operation signal
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Ignition switch ON and rear wiper switch LO or HI
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Pulse generation
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V3-16 (W) - V2-6 (GND)
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R - W-B
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Rear wiper reverse position switch signal
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Ignition switch ON
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Pulse generation
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V3-17 (P) - V3-25 (SGND)
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V - G
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Rear wiper retractable position switch signal
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Ignition switch ON
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Below 1 V
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V3-12 (DSV) - V3-23 (DSG)
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LG - SB
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Power supply for Hall-IC
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Ignition switch ON
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11 to 14 V
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V3-13 (DS1) - V3-23 (DSG)
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L - SB
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Back door power window glass position signal
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Back door power window operation
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Pulse generation
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V3-14 (DS2) - V3-23 (DSG)
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Y - SB
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Back door power window glass position signal
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Back door power window operation
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Pulse generation
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V3-19 (KEYE) - V2-6 (GND)
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O - W-B
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Ground for Tail gate control switch
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Always
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Below 1 Ω
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V3-23 (DSG) - V2-6 (GND)
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SB - W-B
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Ground for Hall-IC
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Always
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Below 1 Ω
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V3-25 (SGND) - V2-6 (GND)
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G - W-B
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Ground for rear wiper reverse position and rear wiper retractable position switch
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Always
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Below 1 Ω
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If the result is not as specified, there may be a malfunction on the wire harness side.
3. CHECK HEADLIGHT CLEANER CONTROL RELAY
(a) Disconnect the relay connector.
(b) Measure the resistance and voltage according to the value(s) in the table below.
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Terminal No. (Symbol)
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Wiring Color
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Terminal Description
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Condition
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Specified Condition
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A32-3 (IG) - A32-4 (E)
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GR - W-B
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IG power supply
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Ignition switch off
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Below 1 V
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Ignition switch ON
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11 to 14 V
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A32-4(E) - Body ground
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W-B - Body ground
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Ground
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Always
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Below 1 Ω
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A32-2 (H) - A32-4 (E)
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BR - W-B
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Headlight cleaner switch and headlight switch operation signal
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Headlight cleaner switch OFF
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Below 1 V
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Headlight switch OFF
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Below 1 V
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Headlight cleaner switch ON and headlight switch ON
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11 to 14 V
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If the result is not as specified, there may be a malfunction on the wire harness side.
(c) Reconnect the relay connector.
(d) Measure the voltage according to the value(s) in the table below.
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Terminal No. (Symbol)
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Wiring Color
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Terminal Description
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Condition
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Specified Condition
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A32-6 (PB) - A32-4 (E)
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R - W-B
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Headlight cleaner motor operation signal
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Headlight cleaner motor stopped
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11 to 14 V
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Headlight cleaner motor operating
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Below 1 V
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If the result is not as specified, the relay may have a malfunction.
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