DESCRIPTION
There may be a short circuit between the CAN main bus lines and/or CAN branch lines when the resistance between terminals 23 (CA1H) and 8 (CA1L) of the central gateway ECU (network gateway ECU) is below 54 Ω.
Symptom |
Trouble Area |
---|---|
Resistance between terminals 23 (CA1H) and 8 (CA1L) of the central gateway ECU (network gateway ECU) is below 54 Ω. |
|
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 SHORT IN CAN 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:
|
|
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. 1 CAN JUNCTION CONNECTOR |
C | ![]() |
GO TO STEP 8 |
|
3. |
CHECK FOR SHORT IN CAN BUS LINES (NO. 1 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. Standard Resistance:
|
|
OK | ![]() |
REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) |
NG | ![]() |
REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 1 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
4. |
CHECK FOR SHORT IN CAN 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 |
NG (Line to ECU or sensor) |
D |
A | ![]() |
REPLACE NO. 6 CAN JUNCTION CONNECTOR |
C | ![]() |
GO TO STEP 6 |
D | ![]() |
GO TO STEP 8 |
|
5. |
CHECK FOR SHORT IN CAN BUS LINES (NO. 6 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. Standard Resistance:
|
|
OK | ![]() |
REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) |
NG | ![]() |
REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 6 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
6. |
CHECK FOR SHORT IN CAN 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 central gateway ECU (network gateway ECU)) |
B |
NG (Line to No. 6 CAN junction connector) |
C |
NG (Line to ECU or sensor) |
D |
A | ![]() |
REPLACE NO. 1 CAN JUNCTION CONNECTOR |
C | ![]() |
REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 1 CAN JUNCTION CONNECTOR - NO. 6 CAN JUNCTION CONNECTOR) |
D | ![]() |
GO TO STEP 8 |
|
7. |
CHECK FOR SHORT IN CAN BUS LINES (NO. 1 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. Standard Resistance:
|
|
OK | ![]() |
REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) |
NG | ![]() |
REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 1 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
8. |
CHECK FOR SHORT IN CAN BUS LINES (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 short circuited branch line is connected.
Click here
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
HINT:
|
|
OK | ![]() |
REPLACE ECU OR SENSOR |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Toyota CH-R Service Manual > Occupant Classification System: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the cause of problem symptoms.
If multiple suspected areas are listed, the potential causes of the symptoms
are listed in order of probability in the "Suspected Area" column of the
table. Check each sy ...
Toyota CH-R Service Manual > Smart Key System(for Start Function): Operation Check
OPERATION CHECK
NOTICE:
Make sure that the smart key system (for Start Function) has not been canceled
before performing this inspection.
Click here
OPERATION DESCRIPTION
(a) Push-button start function:
(1) When the electrical key transmitter sub-assembly is in a vehicle interior
detecti ...