Last Modified: 04-05-2023 |
6.11:8.1.0 |
Doc ID: RM100000000VIUC |
Model Year Start: 2016 |
Model: Sienna |
Prod Date Range: [12/2015 - 08/2016] |
Title: TIRE PRESSURE MONITORING: TIRE PRESSURE WARNING SYSTEM: C2174/74,C2191/91; Vehicle Speed Signal Malfunction; 2016 MY Sienna [12/2015 - 08/2016] |
DTC
|
C2174/74
|
Vehicle Speed Signal Malfunction
|
DTC
|
C2191/91
|
Vehicle Speed Signal Error (Test Mode DTC)
|
DESCRIPTION
Speed signals are input into the tire pressure warning ECU from the combination meter. At the same time, the G-SW in the tire pressure warning valve and transmitter detects driving conditions, and sends signals to the tire pressure warning ECU. If the speed signal from the combination meter stops and the G-SW signal in the tire pressure warning valve and transmitter indicates that the vehicle is being driven, DTC C2174/74 is stored.
DTC C2191/91 is stored only in test mode.
DTC No.
|
DTC Detection Condition
|
Trouble Area
|
C2174/74
|
Vehicle speed signal malfunction
|
-
Combination meter
-
Vehicle speed signal circuit
-
Harness or connector
-
Tire pressure warning ECU
-
Tire pressure warning valve and transmitter
|
C2191/91
|
Test mode procedure is performed
|
-
Meter / gauge system (speed signal)
-
Vehicle speed signal circuit
-
Harness or connector
-
Tire pressure warning ECU
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
When replacing the tire pressure warning ECU, read the transmitter IDs stored in the old ECU using the Techstream and write them down before removal.
-
It is necessary to perform initialization (See page
) after registration (See page
) of the transmitter IDs into the tire pressure warning ECU after the ECU and/or tire pressure warning valve and transmitter has been replaced.
HINT:
When the speedometer needle is not moving, first troubleshoot the meter/gauge system (See page
).
PROCEDURE
1.
|
READ VALUE USING TECHSTREAM (VEHICLE SPEED)
|
(a) Turn the ignition switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON.
(d) Turn the Techstream on.
(e) Enter the following menus: Chassis / Tire Pressure Monitor / Data List.
(f) Check that the values indicated on the Techstream and on the combination meter are the same.
Tire Pressure Monitor
Tester Display
|
Measurement Item/Range
|
Normal Condition
|
Diagnostic Note
|
Vehicle Speed
|
Vehicle speed reading/
min.: 0 km/h (0 mph)
max.: 255 km/h (158 mph)
|
Actual vehicle speed
|
Speed indicated on combination meter
|
OK:
Vehicle speed indicated on the Techstream indicates the actual speed.
OK
|
|
|
(a) Perform a driving test.
(b) Check for DTCs.
HINT:
The time required for DTC C2174/74 to be stored is 20 minutes.
Result
Result
|
Proceed to
|
DTC C2174/74 is not output
|
A
|
DTC C2174/74 is output
|
B
|
3.
|
CHECK HARNESS AND CONNECTOR (ECU - COMBINATION METER)
|
(a) Disconnect the D82 tire pressure warning ECU connector.
(b) Disconnect the D18 combination meter connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
D82-2 (SPD) - D18-10 (+S)
|
Always
|
Below 1 Ω
|
D82-2 (SPD) - Body ground
|
Always
|
10 kΩ or higher
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
4.
|
CHECK HARNESS AND CONNECTOR (COMBINATION METER - SKID CONTROL ECU)
|
(a) Disconnect the A4 skid control ECU connector.
(b) Disconnect the D18 combination meter connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
A4-11 (SP1) - D18-11 (SI)
|
Always
|
Below 1 Ω
|
A4-11 (SP1) - Body ground
|
Always
|
10 kΩ or higher
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
5.
|
CHECK DTC (SFI SYSTEM)
|
(a) Check for DTCs (See page
).
Result
Result
|
Proceed to
|
DTC P0500 is not output
|
A
|
DTC P0500 is output
|
B
|
A
|
|
|
6.
|
REPLACE TIRE PRESSURE WARNING ECU
|
(a) Replace the tire pressure warning ECU (See page
).
NEXT
|
|
|
7.
|
REGISTRATION OF TRANSMITTER ID
|
(a) Perform registration (See page
).
NEXT
|
|
|
8.
|
PERFORM INITIALIZATION
|
(a) Perform initialization (See page
).
NEXT
|
|
|
(a) Perform a driving test.
(b) Check for DTCs.
HINT:
The time required for DTC C2174/74 to be stored is 20 minutes.
Result
Result
|
Proceed to
|
DTC C2174/74 is output
|
A
|
DTC C2174/74 is not output
|
B
|
B |
|
END
|
|