DESCRIPTION
There may be an open circuit in one of the CAN main bus lines when the resistance between terminals 23 (CA1H) and 8 (CA1L) of the central gateway ECU (network gateway ECU) is 70 Ω or higher.
Symptom |
Trouble Area |
---|---|
Resistance between terminals 23 (CA1H) and 8 (CA1L) of the central gateway ECU (network gateway ECU) is 70 Ω or higher. |
|
This malfunction is not related to the lines of a CAN branch or to ECUs or sensors connected to a CAN branch.
WIRING DIAGRAM
w/o Blind Spot Monitor System
w/ Blind Spot Monitor System
CAUTION / NOTICE / HINT
NOTICE:
Click here
Click here
DTC check procedure: Turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch), turn the cruise control main switch on, turn the LDA main switch on and then drive the vehicle at a speed of 40 km/h (25 mph) or more for approximately 52 seconds or more.
Click here
HINT:
PROCEDURE
1. |
CHECK VEHICLE TYPE |
(a) Check vehicle type.
Result |
Proceed to |
---|---|
w/o Blind Spot Monitor System |
A |
w/ Blind Spot Monitor System |
B |
B | ![]() |
GO TO STEP 4 |
|
2. |
CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 1 CAN JUNCTION CONNECTOR) |
(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the No. 1 CAN junction connector.
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
OK | ![]() |
REPLACE NO. 1 CAN JUNCTION CONNECTOR |
|
3. |
CHECK FOR OPEN IN CAN MAIN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 1 CAN JUNCTION CONNECTOR) |
(a) Reconnect the F112 No. 1 CAN junction connector.
(b) Disconnect the central gateway ECU (network gateway ECU) connector.
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
OK | ![]() |
REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) |
NG | ![]() |
REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 1 CAN JUNCTION CONNECTOR) |
4. |
CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 6 CAN JUNCTION CONNECTOR) |
(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the No. 6 CAN junction connector.
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
Result |
Proceed to |
---|---|
OK |
A |
NG (Line to central gateway ECU (network gateway ECU)) |
B |
NG (Line to No. 1 CAN junction connector) |
C |
A | ![]() |
REPLACE NO. 6 CAN JUNCTION CONNECTOR |
C | ![]() |
GO TO STEP 6 |
|
5. |
CHECK FOR OPEN IN CAN MAIN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 6 CAN JUNCTION CONNECTOR) |
(a) Reconnect the M92 No. 6 CAN junction connector.
(b) Disconnect the central gateway ECU (network gateway ECU) connector.
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
OK | ![]() |
REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) |
NG | ![]() |
REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 6 CAN JUNCTION CONNECTOR) |
6. |
CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 1 CAN JUNCTION CONNECTOR) |
(a) Reconnect the M92 No. 6 CAN junction connector.
(b) Disconnect the No. 1 CAN junction connector.
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
Result |
Proceed to |
---|---|
OK |
A |
NG (Line to No. 6 CAN junction connector) |
B |
NG (Line to central gateway ECU (network gateway ECU)) |
C |
A | ![]() |
REPLACE NO. 1 CAN JUNCTION CONNECTOR |
B | ![]() |
REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 1 CAN JUNCTION CONNECTOR - NO. 6 CAN JUNCTION CONNECTOR) |
|
7. |
CHECK FOR OPEN IN CAN MAIN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 1 CAN JUNCTION CONNECTOR) |
(a) Reconnect the F112 No. 1 CAN junction connector.
(b) Disconnect the central gateway ECU (network gateway ECU) connector.
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
OK | ![]() |
REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) |
NG | ![]() |
REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 1 CAN JUNCTION CONNECTOR) |
Toyota CH-R Service Manual > Can Communication System: Certification ECU Communication Stop Mode
DESCRIPTION
Detection Item
Symptom
Trouble Area
Certification ECU Communication Stop Mode
Any of the following conditions are met:
Communication stop for "Certification (Smart)" is indicated
on the "Comm ...
Toyota CH-R Service Manual > Smart Key System(for Entry Function): Open in Front Floor Electrical Key Oscillator Circuit (B27A5)
DESCRIPTION
The certification ECU (smart key ECU assembly) generates a request signal and
transmits the signal to the No. 1 indoor electrical key antenna assembly (front
floor). For the No. 1 indoor electrical key antenna assembly (front floor) to detect
when the electrical key transmitter su ...