Toyota Sienna Service Manual: Indicator Circuit
DESCRIPTION
The indicator displays the location of the obstacle and the approximate distance between the vehicle and the obstacle either by blinking or turning on.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - AIR CONDITIONER AMPLIFIER)
- Disconnect the connectors from the clearance warning ECU C9 and air conditioner amplifier connector A10 or A11.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
2 INSPECT INDICATOR
- Remove the integration control & panel assembly with the connectors being connected.
- Using a service wire, ground each terminal of the integration control & panel assembly connector.
- Turn the ignition switch ON.
- Check that each LED comes on.
Result
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
3 INSPECT PRINTED WIRE INTEGRATION BOARD SUB-ASSEMBLY
- Check the malfunction disappears when a known good printed wire integration board sub-assembly is installed
OK: Malfunction disappears.
REPLACE PRINTED WIRE INTEGRATION BOARD SUB-ASSEMBLY
4 INSPECT INTEGRATION PANEL SUB-ASSEMBLY
- Check that the malfunction disappears when a known good integration panel sub-assembly is installed.
OK: Malfunction disappears
REPLACE INTEGRATION PANEL SUB-ASSEMBLY
No. 2 Clearance Warning Buzzer Circuit
DESCRIPTION
The clearance warning ECU receives the ultrasonic sensor signal to sound the
rear warning buzzer.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 CHECK HARNESS AND CONNECTOR (CLEARANCE WAR ...
Horn
...
Other materials:
On-vehicle inspection
1. INSPECT MASS AIR FLOW METE
NOTICE:
Perform the mass air flow (MAF) meter inspection
by following the procedures below.
Only replace the MAF meter when the MAF value
in the DATA LIST (with the engine stopped) are
not within the normal operating range or there is
fore ...
How to proceed with
troubleshooting
1 VEHICLE BROUGHT TO WORKSHOP
2 CUSTOMER PROBLEM ANALYSIS
3 CHECK AND CLEAR DTCs
Refer to the diagnostic check/clear
4 PROBLEM SYMPTOM CONFIRMATION
5 SYMPTOM SIMULATION
6 CHECK DTC
7 CHECK IF THE SAME SYMPTOM APPEARS IN THE NAVIGATION SYSTEM
Refer to the navigation system
8 PROBLE ...
Removal
1. REMOVE CHARCOAL CANISTER PROTECTOR
(a) Remove the 6 bolts and charcoal canister protector.
2. REMOVE CHARCOAL CANISTER ASSEMBLY
(a) Disconnect the fuel tank vent hose from the
charcoal canister.
(1) Push the connector deep inside.
(2) Pinch portion A.
(3) Pull out the connector.
...
