DESCRIPTION
There may be a short circuit between one of the CAN bus lines and +B when no resistance exists between terminal 6 (CA3H) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3, or terminal 21 (CA3L) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3.
Symptom |
Trouble Area |
---|---|
No resistance exists between terminal 6 (CA3H) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3, or terminal 21 (CA3L) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Click here
Click here
DTC check procedure: Turn the ignition switch ON and wait at least approximately 60 seconds.
Click here
HINT:
PROCEDURE
1. |
CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 3 CAN JUNCTION CONNECTOR) |
(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the No. 3 CAN junction connector.
(c) Measure the resistance according to the value(s) in the table below.
*1 |
DLC3 |
- |
- |
*a |
Front view of wire harness connector (to No. 4 CAN Junction Connector) |
*b |
to DCM (Telematics Transceiver) (w/ Telematics Transceiver) |
*c |
to Radio and Display Receiver Assembly (for Radio and Display Type) |
*d |
to Central Gateway ECU (Network Gateway ECU) |
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
Connected to |
---|---|---|---|
F114-8 (CANH) - F41-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
DCM (Telematics transceiver)*1 |
F114-19 (CANL) - F41-16 (BAT) |
|||
F114-9 (CANH) - F41-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Radio and display receiver assembly*2 |
F114-20 (CANL) - F41-16 (BAT) |
|||
F114-10 (CANH) - F41-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Central gateway ECU (network gateway ECU) |
F114-21 (CANL) - F41-16 (BAT) |
|||
F114-11 (CANH) - F41-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Central gateway ECU (network gateway ECU) |
F114-22 (CANL) - F41-16 (BAT) |
Result |
Proceed to |
---|---|
OK |
A |
NG (Line to central gateway ECU (network gateway ECU)) |
B |
NG (Line to ECU or sensor) |
C |
A | ![]() |
REPLACE NO. 3 CAN JUNCTION CONNECTOR |
C | ![]() |
GO TO STEP 3 |
|
2. |
CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 3 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
(a) Disconnect the F74 central gateway ECU (network gateway ECU) connector.
(b) Measure the resistance according to the value(s) in the table below.
*1 |
DLC3 |
- |
- |
*a |
Front view of wire harness connector (to No. 3 CAN Junction Connector) |
*b |
to Central Gateway ECU (Network Gateway ECU) |
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F114-10 (CANH) - F41-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
F114-21 (CANL) - F41-16 (BAT) |
||
F114-11 (CANH) - F41-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
F114-22 (CANL) - F41-16 (BAT) |
OK | ![]() |
REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) |
NG | ![]() |
REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
3. |
CHECK FOR SHORT TO +B IN CAN BUS LINE (ECU OR SENSOR) |
(a) Reconnect all wire harness connectors.
(b) Disconnect the connector that includes terminals CANH and CANL from the ECU or sensor to which the bus line shorted to +B is connected.
Click here
(c) Measure the resistance according to the value(s) in the table below.
*1 |
DLC3 |
- |
- |
*a |
Component with harness connected (Central Gateway ECU (Network Gateway ECU)) |
- |
- |
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F74-6 (CA3H) - F41-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
F74-21 (CA3L) - F41-16 (BAT) |
HINT:
OK | ![]() |
REPLACE ECU OR SENSOR |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Toyota CH-R Service Manual > Navigation System: Portable Player cannot be Connected Manually/Automatically
CAUTION / NOTICE / HINT
HINT:
Some versions of "Bluetooth" compatible audio players may not function properly,
or the functions may be limited using the radio and display receiver assembly, even
if the portable audio player itself can play files.
Click here
PROCEDURE
...
Toyota CH-R Service Manual > Pre-collision System: Other System Malfunction (C1A63)
DESCRIPTION
The millimeter wave radar sensor receives the throttle signal from the ECM and
judges whether the driver is making an acceleration request.
When the ECM detects an electronic throttle malfunction, it informs the millimeter
wave radar sensor via CAN communication and sets DTC C1A63. ...