Toyota Sequoia (2005). Manual — part 526
I18627
B11
B10
–
DIAGNOSTICS
MULTIPLEX COMMUNICATION SYSTEM
DI–1899
2093
5.
CHECK BACK DOOR ECU
(a)
Disconnect the B10 and B11 ECU connectors.
(b)
Measure the resistance or voltage of each terminal of the wire harness side connector.
Standard:
Symbols (Terminals No.)
Wiring Color
Terminal Description
Condition
Specified Condition
MPX2 (B11–1) – Body ground
B – Body ground
MPX line
Always
10 k
Ω
or higher
MPX1 (B11–2) – Body ground
LG–R –
Body ground
MPX line
Always
10 k
Ω
or higher
GND (B11–3) – Body ground
W–B –
Body ground
Ground
Always
Below 1
Ω
BDR (B11–4) – Body ground
L–W –
Body ground
+B (BATT) power supply
Always
10 to 14 V
BECU (B11–5) – Body ground
W–R –
Body ground
+B (BATT) power supply
Always
10 to 14 V
SIG (B11–6) – Body ground
B–R –
Body ground
Ignition power supply
Ignition switch ON
10 to 14 V
If the result is not as specified, there may be a malfunction on the wire harness side.
I27703
C5
C6
DI–1900
–
DIAGNOSTICS
MULTIPLEX COMMUNICATION SYSTEM
2094
6.
CHECK COMBINATION METER
(a)
Disconnect the C5 and C6 meter connectors.
(b)
Measure the resistance or voltage of each terminal of the wire harness side connector.
Standard:
Terminals No.
Wiring Color
Terminal Description
Condition
Specified Condition
C6–24 – Body ground
B–O –
Body ground
Ignition power supply
Ignition switch ON
10 to 14 V
C6–23 – Body ground
W–R –
Body ground
+B (BATT) power supply
Always
10 to 14 V
C5–30 – Body ground
W – Body ground
MPX line
Always
10 k
Ω
or higher
C5–31 – Body ground
LG–R –
Body ground
MPX line
Always
10 k
Ω
or higher
C5–32 – Body ground
LG–B –
Body ground
MPX line
Always
10 k
Ω
or higher
C6–12 – Body ground
BR –
Body ground
Ground
Always
Below 1
Ω
C5–28 – Body ground
B–R –
Body ground
Ignition power supply
Ignition switch ON
10 to 14 V
If the result is not as specified, there may be a malfunction on the wire harness side.
I27716
M7
M6
–
DIAGNOSTICS
MULTIPLEX COMMUNICATION SYSTEM
DI–1901
2095
7.
CHECK MEMORY SEAT ECU & SWITCH (w/ Driving Position Memory)
(a)
Disconnect the M6 and M7 ECU connectors.
(b)
Measure the resistance or voltage of each terminal of the wire harness side connector.
Standard:
Symbols (Terminals No.)
Wiring Color
Terminal Description
Condition
Specified Condition
MPX1 (M6–1) – Body ground
W – Body ground
MPX line
Always
10 k
Ω
or higher
IG (M6–4) – Body ground
B–R –
Body ground
Ignition power supply
Ignition switch ON
10 to 14 V
SYSB (M6–8) – Body ground
W–R –
Body ground
+B (BATT) power supply
Always
10 to 14 V
GND (M7–1) – Body ground
W–B –
Body ground
Ground
Always
Below 1
Ω
+B (M7–5) – Body ground
L–O –
Body ground
+B (BATT) power supply
Always
10 to 14 V
If the result is not as specified, there may be a malfunction on the wire harness side.
I15876
I19
I20
I21
I22
DI–1902
–
DIAGNOSTICS
MULTIPLEX COMMUNICATION SYSTEM
2096
8.
CHECK A/C ECU (INTEGRATION CONTROL AND PANEL)
(a)
Disconnect the I19 ECU connector.
(b)
Measure the resistance or voltage of each terminal of the wire harness side connector.
Standard:
Symbols (Terminals No.)
Wiring Color
Terminal Description
Condition
Specified Condition
+B (I19–1) – Body ground
R – Body ground
+B (BATT) power supply
Always
10 to 14 V
IG+ (I19–2) – Body ground
R–L –
Body ground
Ignition power supply
Ignition switch ON
10 to 14 V
ACC (I19–11) – Body ground
P – Body ground
ACC power supply
Ignition switch ACC
10 to 14 V
MPX+ (I19–3) – Body ground
L–Y –
Body ground
MPX line
Always
10 k
Ω
or higher
MPX– (I19–13) – Body ground
LG–B –
Body ground
MPX line
Always
10 k
Ω
or higher
GND (I19–10) – Body ground
O – 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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