| Last Modified: 11-29-2007 | 1.6 U | |
| Service Category: Vehicle Interior | Section: Theft Deterrent/Keyless Entry | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM000001PQV011X |
| Title: THEFT DETERRENT / KEYLESS ENTRY: THEFT DETERRENT SYSTEM: TERMINALS OF ECU (2008 Sequoia) | ||
TERMINALS OF ECU
1. CHECK MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)
(a) Disconnect the H1, H3, H4, DB, DC and DD ECU connectors.
(b) Measure the voltage and resistance according to the value(s) in the table below.
Standard
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
DB-13 (BECU) - Body ground |
GR - Body ground |
+B power source |
Always |
11 to 14 V |
|
DA-1 (ALTB) - Body ground |
B - Body ground |
+B power source |
Always |
11 to 14 V |
|
DD-62 (GND1,GND2) - Body ground |
W-B - Body ground |
Power ground |
Always |
Below 1 Ω |
|
H4-24 (DCTY) - Body ground |
BR - Body ground |
Driver door courtesy switch |
Driver door CLOSED → OPEN |
10 kΩ or higher → Below 1 Ω |
|
H3-21 (PCTY) - Body ground |
O - Body ground |
Front passenger door courtesy switch input |
Front passenger door CLOSED → OPEN |
10 kΩ or higher → Below 1 Ω |
|
DC-2 (LCTY) - Body ground |
G*1 - Body ground B*2 - Body ground |
Rear left door courtesy switch input |
Rear left door CLOSED → OPEN |
10 kΩ or higher → Below 1 Ω |
|
H3-25 (RRCY) - Body ground |
L - Body ground |
Rear right door courtesy switch input |
Rear right door CLOSED → OPEN |
10 kΩ or higher → Below 1 Ω |
|
H4-16 (HCTY) - Body ground |
V - Body ground |
Engine hood courtesy switch |
Engine hood CLOSED → OPEN |
10 kΩ or higher → Below 1 Ω |
|
H1-5 (KSW) - Body ground |
LG - Body ground |
Key unlock warning switch signal |
No key is in ignition key cylinder |
10 kΩ or higher |
|
Key is in ignition key cylinder |
Below 1 Ω |
*1: w/ Power Seat (Rear No. 2)
*2: w/o Power Seat (Rear No. 2)
If the result is not as specified, there may be a malfunction on the wire harness side.
(c) Reconnect the H1, H3, H4, DB, DC and DD ECU connectors.
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
H1-4 (IND) - Body ground |
P - Body ground |
Security indicator signal |
Security indicator illuminates (illuminates only for 60 sec. in alarm sounding state (it is blinking when system is in armed state)) |
3 to 5 V |
|
H1-6 (SH) - Body ground |
W - Body ground |
Security horn signal |
Armed state |
Below 1 V |
|
Security horn is sounding (theft deterrent system is in alarm sounding state) |
Pulse generation |
|||
|
H2-4 (HAZ) - Body ground |
O - Body ground |
Hazard warning light signal |
Armed state |
Below 1 V |
|
Security horn is sounding (theft deterrent system is in alarm sounding state) |
Pulse generation |
|||
|
H4-17 (GBS)* - Body ground |
L - Body ground |
Glass breakage sensor ECU signal |
Armed state |
Below 1 V |
|
Glass breakage sensor ECU signal system is in alarm sounding state |
Pulse generation |
|||
|
DB-1 (HORN) - Body ground |
V - Body ground |
Horn signal (low pitched and high pitched) |
Armed state |
Below 1 V |
|
Horn is sounding |
11 to 14 V |
*: w/ Glass Breakage Sensor
If the result is not as specified, the ECU may have a malfunction.
2. CHECK BACK DOOR ECU
(a) Disconnect the V2 and V3 connectors.
(b) Measure the resistance and voltage according to the value(s) in the table below.
Standard
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
V2-1 (BDR) - Body ground |
SB - Body ground |
BDR power supply |
Always |
11 to 14 V |
|
V2-7 (BECU) - Body ground |
GR - Body ground |
BECU power supply |
Always |
11 to 14 V |
|
V3-10 (BDCY) - V3-20 (CTYE) |
P - R |
Back door courtesy switch circuit |
Back door is open |
10 kΩ or higher |
|
V3-10 (BDCY) - V3-20 (CTYE) |
P - R |
Back door courtesy switch circuit |
Back door is closed |
Below 1 Ω |
|
V3-15 (HSW+) - V3-24 (HSW-) |
B - W |
Back door opener switch signal circuit |
Back door opener switch OFF |
10 kΩ or higher |
|
V3-15 (HSW+) - V3-24 (HSW-) |
B - W |
Back door opener switch signal circuit |
Back door opener switch ON |
Below 1 Ω |
|
V2-6 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
If the result is not as specified, there may be a malfunction on the wire harness side.
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