2007 TOYOTA SIENNA ecu harness

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–403
ES
NG
OK
NEXT
(a) Read the DTCs using the intelligent tester.
(b) Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / DTC INFO / PENDING CODES.
Result
B
A
(a) Replace the air fuel ratio sensor (for 2WD model (See
page EC-19) or 4WD model (See page EC-26)).
A165205E01
REPAIR OR REPLACE HARNESS OR
CONNECTOR (A/F SENSOR - ECM)
4PERFORM CONFIRMATION DRIVING PATTERN
5CHECK WHETHER DTC OUTPUT RECURS (DTC P2A00 AND/OR P2A03)
Display (DTC Output) Proceed to
P2A00 and/or P2A03 A
No output B
CHECK FOR INTERMITTENT PROBLEMS
6REPLACE AIR FUEL RATIO SENSOR

RF–4SLIDING ROOF – SLIDING ROOF SYSTEM
RF
PROBLEM SYMPTOMS TABLE
SLIDING ROOF SYSTEM
Symptom Suspected area See page
AUTO function does not operate Sliding roof motor assemblyRF-3
Sliding roof system does not operate1. ECU-IG fuse -
2. S/ Roof fuse -
3. IG1 relay -
4. Sliding roof housing assemblyRF-11
5. Sliding roof motor switch assemblyRF-13
6. Sliding roof motor assemblyRF-3
7. Wire harnessRF-3
Sliding roof system stops operation halfway1. Sliding roof motor assemblyRF-3
2. Wire harnessRF-3
3. Sliding roof housing assemblyRF-11

MULTIPLEX COMMUNICATION – MULTIPLEX COMMUNICATION SYSTEMMP–5
MP
TERMINALS OF ECU
1. MULTIPLEX NETWORK GATEWAY ECU
(a) Disconnect the G4 ECU connector.
(b) Measure the voltage between the specified
terminals on the wire harness side connector.
If the result is not as specified, there may be a
malfunction on the wire harness side.
(c) Measure the resistance between the specified
terminals on the wire harness side connector.
If the result is not as specified, there may be a
malfunction on the wire harness side.
C129903E02
Terminal No.
(Symbols)Wiring Color Terminal Description Condition Specified Condition
G4-1 (IG) - Body ground B-R - Body ground Power supply (IG) Ignition switch: ON 11 to 14 V
G4-2 (ACC) - Body ground P - Body ground Power source (ACC) Ignition switch: ACC 11 to 14 V
G4-10 (BATT) - Body
groundW-L - Body ground Power supply (Battery) Always 11 to 14 V
Terminal No.
(Symbols)Wiring Color Terminal Description Condition Specified Condition
G4-3 (MPD1) - Body
groundR-G - Body ground MPX line Always 10 k
or higher
G4-12 (MPD2) - Body
groundR-L - Body ground MPX line Always 10 k
or higher
G4-24 (GND) - Body
groundW-B - Body ground Ground Always Below 1

MULTIPLEX COMMUNICATION – MULTIPLEX COMMUNICATION SYSTEMMP–7
MP
(b) Measure the voltage between the specified
terminals on the wire harness side connector.
If the result is not as specified, there may be a
malfunction on the wire harness side.
(c) Measure the resistance between the specified
terminals on the wire harness side connector.
If the result is not as specified, there may be a
malfunction on the wire harness side.
3. AIRBAG SENSOR ASSEMBLY
(a) Disconnect the A21 ECU connector.
(b) Measure the voltage between the specified
terminals on the wire harness side connector.
If the result is not as specified, there may be a
malfunction on the wire harness side.
Terminal No.
(Symbols)Wiring Color Terminal Description Condition Specified Condition
1A-1 - Body ground W - Body ground Power supply (Battery) Always 11 to 14 V
1C-30 (ALTB) - Body
groundB - Body ground Power supply (Battery) Always 11 to 14 V
Terminal No.
(Symbols)Wiring Color Terminal Description Condition Specified Condition
1E-7 (MPX1) - Body
groundR-L - Body ground MPX line Always 10 k
or higher
B7-21 (MPX2) - Body
groundR-L - Body ground MPX line Always 10 k
or higher
1L-16 (GND1) - Body
groundW-B - Body ground Ground Always Below 1
1K-17 (GND2) - Body
groundW-B - Body ground Ground Always Below 1
C111710E10
Terminal No.
(Symbols)Wiring Color Terminal Description Condition Specified Condition
A21-5 (IG2) - Body ground B-O - Body ground Power supply (IG) Ignition switch: ON 11 to 14 V

MP–8MULTIPLEX COMMUNICATION – MULTIPLEX COMMUNICATION SYSTEM
MP
(c) Measure the resistance between the specified
terminals on the wire harness side connector.
If the result is not as specified, there may be a
malfunction on the wire harness side.
4. SEAT POSITION CONTROL ECU (with Driving
Position Memory)
(a) Disconnect the P58 and P59 ECU connectors.
(b) Measure the voltage between the specified
terminals on the wire harness side connector.
If the result is not as specified, there may be a
malfunction on the wire harness side.
(c) Measure the resistance between the specified
terminals on the wire harness side connector.
If the result is not as specified, there may be a
malfunction on the wire harness side.
Te r m i n a l N o .
(Symbols)Wiring Color Terminal Description Condition Specified Condition
A21-24 (MPX1) - Body
groundR-L - Body ground MPX line Always 10 k
or higher
A21-22 (MPX2) - Body
groundR-L - Body ground MPX line Always 10 k
or higher
A21-27 (E1) - Body
groundW-B - Body ground Ground Always Below 1
A21-28 (E2) - Body
groundW-B - Body ground Ground Always Below 1
B066387E13
Te r m i n a l N o .
(Symbols)Wiring Color Terminal Description Condition Specified Condition
P59-4 (IG) - Body ground Y - Body ground Power supply (IG) Ignition switch: ON 11 to 14 V
P59-8 (SYSB) - Body
groundW-L - Body ground Power supply (Battery) Always 11 to 14 V
P58-5 (+B) - Body ground V - Body ground Power supply (Battery) Always 11 to 14 V
Te r m i n a l N o .
(Symbols)Wiring Color Terminal Description Condition Specified Condition
P59-1 (MPX1) - Body
groundR-L - Body ground MPX line Always 10 k
or higher
P58-1 (GND) - Body
groundW-B - Body ground Ground Always Below 1

MULTIPLEX COMMUNICATION – MULTIPLEX COMMUNICATION SYSTEMMP–9
MP
5. AIR CONDITIONING AMPLIFIER
(a) Disconnect the A9 ECU connector.
(b) Measure the voltage between the specified
terminals on the wire harness side connector.
If the result is not as specified, there may be a
malfunction on the wire harness side.
(c) Measure the resistance between the specified
terminals on the wire harness side connector.
HINT:
*1: for Automatic A/C
*2: for Manual A/C
If the result is not as specified, there may be a
malfunction on the wire harness side.
B067255E02
Terminal No.
(Symbols)Wiring Color Terminal Description Condition Specified Condition
A9-20 (B) - Body ground
(*1)W-L - Body ground Power supply (Battery) Always 11 to 14 V
A9-17 (+B) - Body ground
(*2)W-L - Body ground Power supply (Battery) Always 11 to 14 V
A9-19 (ACC) - Body
ground (*1)P - Body ground Power supply (ACC) Ignition switch: ACC 11 to 14 V
A9-40 (ACC) - Body
ground (*2)P - Body ground Power supply (ACC) Ignition switch: ACC 11 to 14 V
A9-18 (IG) - Body ground
(*1)R-Y - Body ground Power supply (IG) Ignition switch: ON 11 to 14 V
A9-38 (IG+) - Body ground
(*2)R-Y - Body ground Power supply (IG) Ignition switch: ON 11 to 14 V
Terminal No.
(Symbols)Wiring Color Terminal Description Condition Specified Condition
A9-2 (MPX+) - Body
ground (*1)V - Body ground MPX line Always 10 k
or higher
A9-4 (MPX+) - Body
ground (*2)V - Body ground MPX line Always 10 k
or higher
A9-3 (MPX-) - Body
ground (*1)R-L - Body ground MPX line Always 10 k
or higher
A9-5 (MPX-) - Body
ground (*2)R-L - Body ground MPX line Always 10 k
or higher
A9-1 (GND) - Body ground
(*1)W-B - Body ground Ground Always Below 1
A9-6 (GND) - Body ground
(*2)W-B - Body ground Ground Always Below 1

MP–10MULTIPLEX COMMUNICATION – MULTIPLEX COMMUNICATION SYSTEM
MP
6. COMBINATION METER
(a) Disconnect the C10 ECU connector.
(b) Measure the voltage between the specified
terminals on the wire harness side connector.
If the result is not as specified, there may be a
malfunction on the wire harness side.
(c) Measure the resistance between the specified
terminals on the wire harness side connector.
If the result is not as specified, there may be a
malfunction on the wire harness side.
7. POWER SLIDE DOOR ECU RH
(a) Disconnect the P27 and P28 ECU connectors.
(b) Measure the voltage between the specified
terminals on the wire harness side connector.
B067255E03
Te r m i n a l N o .
(Symbols)Wiring Color Terminal Description Condition Specified Condition
C10-12 (+B) - Body
groundW-L - Body ground Power supply (Battery) Always 11 to 14 V
C10-32 (IG+) - Body
groundB-R - Body ground Power supply (IG) Ignition switch: ON 11 to 14 V
Te r m i n a l N o .
(Symbols)Wiring Color Terminal Description Condition Specified Condition
C10-29 (MPX1) - Body
groundR-L - Body ground MPX line Always 10 k
or higher
C10-28 (MPX2) - Body
groundV - Body ground MPX line Always 10 k
or higher
C10-30 (ES) - Body
groundBR - Body ground Ground Always Below 1
B067256E02
Te r m i n a l N o .
(Symbols)Wiring Color Terminal Description Condition Specified Condition
P28-2 (B) - Body ground B - Body ground Power supply (Battery) Always 11 to 14 V

MULTIPLEX COMMUNICATION – MULTIPLEX COMMUNICATION SYSTEMMP–11
MP
If the result is not as specified, there may be a
malfunction on the wire harness side.
(c) Measure the resistance between the specified
terminals on the wire harness side connector.
If the result is not as specified, there may be a
malfunction on the wire harness side.
8. POWER SLIDE DOOR ECU LH
(a) Disconnect the P25 and P26 ECU connectors.
(b) Measure the voltage between the specified
terminals on the wire harness side connector.
If the result is not as specified, there may be a
malfunction on the wire harness side.
(c) Measure the resistance between the specified
terminals on the wire harness side connector.
If the result is not as specified, there may be a
malfunction on the wire harness side.
P27-10 (ECUB) - Body
groundW - Body ground Power supply (Battery) Always 11 to 14 V Terminal No.
(Symbols)Wiring Color Terminal Description Condition Specified Condition
Terminal No.
(Symbols)Wiring Color Terminal Description Condition Specified Condition
P27-22 (MPX1) - Body
groundR - Body ground MPX line Always 10 k
or higher
P28-8 (GND) - Body
groundW-B - Body ground Ground Always Below 1
B067256E03
Terminal No.
(Symbols)Wiring Color Terminal Description Condition Specified Condition
P26-2 (B) - Body ground B-W - Body ground Power supply (Battery) Always 11 to 14 V
P25-10 (ECUB) - Body
groundW - Body ground Power supply (Battery) Always 11 to 14 V
Terminal No.
(Symbols)Wiring Color Terminal Description Condition Specified Condition
P25-22 (MPX1) - Body
groundR - Body ground MPX line Always 10 k
or higher
P26-8 (GND) - Body
groundW-B - Body ground Ground Always Below 1