Toyota CH-R Service Manual: Tachometer Malfunction
DESCRIPTION
In this circuit, the combination meter assembly receives engine speed signals from the ECM via CAN communication. The combination meter assembly displays the engine speed calculated based on the data received from the ECM.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- Before replacing the ECM, refer to Registration
- w/ Smart Key System:
Click here
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- w/o Smart Key System:
Click here
- w/ Smart Key System:
- When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.
PROCEDURE
|
1. |
CHECK FOR DTC (METER / GAUGE SYSTEM) |
(a) Check if meter / gauge system DTCs are output.
Click here
|
Result |
Proceed to |
|---|---|
|
Meter / gauge system DTCs are not output. |
A |
|
Meter / gauge system DTCs are output. |
B |
| B | .gif) |
GO TO DIAGNOSTIC TROUBLE CODE CHART |
|
.gif)
|
2. |
CHECK FOR DTC (SFI SYSTEM) |
(a) Check if SFI system DTCs are output.
- w/ Canister Pump Module:
Click here
- w/o Canister Pump Module:
Click here
|
Result |
Proceed to |
|---|---|
|
SFI system DTCs are not output. |
A |
|
SFI system DTCs are output. |
B |
| B | |
GO TO DIAGNOSTIC TROUBLE CODE CHART |
|
|
3. |
PERFORM ACTIVE TEST USING TECHSTREAM (ENGINE SPEED, ENGINE RPM) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus:
(1) for Engine: Powertrain / Engine and ECT / Data List.
(2) for Combination Meter: Body Electrical / Combination Meter / Data List.
(e) Read the Data List according to the display on the Techstream.
(1) Engine and ECT
Powertrain > Engine and ECT > Data List|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
Engine Speed |
Engine speed |
Min.: 0 rpm, Max.: 16383 rpm |
710 to 810 rpm: Idling with warm engine |
When the crankshaft position sensor is malfunctioning, "Engine Speed" is approximately 0 rpm or varies greatly from the actual engine speed. |
|
Tester Display |
|---|
|
Engine Speed |
(2) Combination Meter.
Body Electrical > Combination Meter > Data List|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
Engine Rpm |
Engine speed |
Min.: 0 rpm, Max.:12750 rpm |
Almost the same as actual tachometer |
- |
|
Tester Display |
|---|
|
Engine Rpm |
|
Result |
Proceed to |
|---|---|
|
The Data List values of the ECUs do not match |
A |
|
The Data List values of the ECUs match |
B |
HINT:
- When the Data List values of the ECUs match, an internal malfunction of the ECM is suspected.
- When the Data List values of the ECUs do not match, a signal output malfunction of the ECM or an internal malfunction of the combination meter assembly is suspected.
| A | |
REPLACE ECM |
| B | |
REPLACE COMBINATION METER ASSEMBLY |
Speedometer Malfunction
DESCRIPTION
The combination meter assembly receives vehicle speed signals from the skid control
ECU (brake actuator assembly) via CAN communication. The speed sensor detects the
wheel speed and s ...
Engine Coolant Temperature Receiver Gauge Malfunction
DESCRIPTION
In this circuit, the combination meter assembly receives engine coolant temperature
signals from the ECM via CAN communication. The combination meter assembly displays
the engine cool ...
Other materials:
Toyota CH-R Service Manual > Can Communication System: Dtc Combination Table
DTC COMBINATION TABLE
HOW TO INTERPRET COMMUNICATION DTCS (DTCS THAT START WITH U)
(a) If a CAN communication error cannot be reproduced, determine the suspected
malfunctioning part using the DTCs stored in ECUs that are connected to the CAN
buses by following the procedure below.
HINT:
Comm ...
Toyota CH-R Service Manual > Toyota Entune System: Dtc Check / Clear
DTC CHECK / CLEAR
CHECK DTC
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Telematics / Trouble Codes.
Body Electrical > Telematics > Trouble Codes
(e) Check for DTCs.
Click here
...
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