Toyota Sienna Service Manual: Door Courtesy Switch Circuit
DESCRIPTION
The Multiplex network body ECU detects the condition of the door courtesy switch assembly.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 READ VALUE OF INTELLIGENT TESTER
- Connect the intelligent tester to DLC3.
- Turn the ignition switch to ON and push the intelligent tester main switch ON.
- Select the items below in the DATA LIST, and read the displays on the intelligent tester
BODY NO.1:
BACK DOOR:
2 INSPECT COURTESY LIGHT SWITCH
- Inspect each of the courtesy light switch continuity
3 INSPECT BACK DOOR LOCK ASSEMBLY
- Inspect the courtesy light switch terminal of the back door lock assembly
4 CHECK HARNESS AND CONNECTOR
- Disconnect the 1P, B7 and B9 connector from the instrument panel junction block assembly
- Check the resistance between each of the terminals of instrument panel junction block assembly connector side and body ground as shown in the chart below.
Resistance
5 INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (BACK DOOR COURTESY LIGHT SWITCH CIRCUIT)
- Measure voltage between the terminal B7-25 of the multiplex network body ECU and body ground.
Voltage
6 CONFIRM VEHICLE TYPE
- Check the vehicle models.
A: w/o Power back door
B: w/ Power back door
7 INSPECT POWER BACK DOOR SYSTEM
- Inspect the power back door circuit
REPAIR OR REPLACE HARNESS OR CONNECTOR
Automatic Light Control Sensor Circuit
DESCRIPTION
The Multiplex network body ECU receives the signal from the automatic light
control sensor.
HINT:
DTC code is output when malfunction of automatic light control sensor or open or
...
Door LOCK Position Circuit
DESCRIPTION
This circuit detects the state of the door lock detection sensor and send it
to the Multiplex network body
ECU.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 READ VALUE OF INTELLIGENT T ...
Other materials:
Check component status
(a) Compare the test value with the minimum test limit
(MIN LIMIT) and maximum test limit (MAX LIMIT).
(b) If the test value is between the minimum test limit
and maximum test limit, the component is
functioning normally. If not, the component is
malfunctioning. The test value is usually sign ...
Check for short circuit
(a) If the wire harness is ground shorted (Fig. 5), locate the section by
conducting a resistance check with the body ground (below).
(b) Check the resistance with the body ground.
(1) Disconnect connectors A and C and measure
the resistance.
Standard resistance (Fig. 6)
HIN ...
Diagnosis system
1. DESCRIPTION
When troubleshooting a vehicle with the diagnosis
system, the only difference from the usual
troubleshooting procedure is connecting the
intelligent tester to the vehicle and reading various
data output from the vehicle's clearance warning
ECU.
The clearance warn ...
