DESCRIPTION
There may be a short circuit between one of the CAN bus lines and GND when there is no resistance between terminal 18 (CA4H) of the central gateway ECU (network gateway ECU) and terminal 4 (CG) of the DLC3, or terminal 17 (CA4L) of the central gateway ECU (network gateway ECU) and terminal 4 (CG) of the DLC3.
Symptom |
Trouble Area |
---|---|
No resistance exists between terminal 18 (CA4H) of the central gateway ECU (network gateway ECU) and terminal 4 (CG) of the DLC3, or terminal 17 (CA4L) of the central gateway ECU (network gateway ECU) and terminal 4 (CG) of the DLC3. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
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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 60 km/h (37 mph) or more for approximately 5 minutes or more.
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HINT:
PROCEDURE
1. |
CHECK FOR SHORT TO GND IN CAN BUS LINE (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the central gateway ECU (network gateway ECU) connector.
(c) Measure the resistance according to the value(s) in the table below.
*1 |
DLC3 |
- |
- |
*a |
Front view of wire harness connector (to Central Gateway ECU (Network Gateway ECU)) |
*b |
to ECM |
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
Connected to |
---|---|---|---|
F74-18 (CA4H) - F41-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
ECM |
F74-17 (CA4L) - F41-4 (CG) |
OK | ![]() |
REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) |
|
2. |
CHECK FOR SHORT TO GND IN CAN BUS LINE (ECM - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
(a) Disconnect the A38 ECM connector.
(b) Measure the resistance according to the value(s) in the table below.
*1 |
DLC3 |
- |
- |
*a |
Front view of wire harness connector (to Central Gateway ECU (Network Gateway ECU)) |
*b |
to ECM |
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F74-18 (CA4H) - F41-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
F74-17 (CA4L) - F41-4 (CG) |
OK | ![]() |
REPLACE ECM
|
NG | ![]() |
REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (ECM - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
Toyota CH-R Service Manual > Steering Pad Switch: Inspection
INSPECTION
PROCEDURE
1. INSPECT STEERING PAD SWITCH ASSEMBLY
(a) Measure the resistance according to the value(s) in the table below.
*A
w/ Lane Departure Alert System
*B
w/ Voice Switch
*C
w/ Microphone
-
...
Toyota CH-R Service Manual > Lighting System: Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
Lighting System
DTC No.
Detection Item
Note
Link
B1244
Light Sensor Circuit Malfunction
-
B242C
Right Headlight ECU Malfunction
...