Toyota Yaris: Can Communication System / Center Airbag Sensor Communication Stop Mode
DESCRIPTION
Detection Item | Symptom | Trouble Area |
Center Airbag Sensor Communication Stop Mode | Communication stop for "Airbag" is indicated on the "Communication Bus Check" screen of the GTS. Click here
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Airbag sensor assembly main line or connector
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Power source circuit of airbag sensor assembly
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Airbag sensor assembly ground circuit
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Airbag sensor assembly
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WIRING DIAGRAM
CAUTION / NOTICE / HINT
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
HINT:
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Before disconnecting related connectors for inspection, push in on each connector body to check that the connector is not loose or disconnected.
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When a connector is disconnected, check that the terminals and connector body are not cracked, deformed or corroded.
PROCEDURE
1. | CHECK FOR OPEN IN CAN BUS LINES (AIRBAG SENSOR ASSEMBLY BRANCH LINE) |
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the airbag sensor assembly connector.
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection | Condition | Specified Condition | H14-26 (CAFH) - H14-27 (CAFL) | Cable disconnected from negative (-) auxiliary battery terminal | 54 to 69 Ω | |
| *a | Front view of wire harness connector (to Airbag Sensor Assembly) | | |
NG |
| REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (AIRBAG SENSOR ASSEMBLY) |
OK |
| |
2. | CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) |
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection | Condition | Specified Condition | H14-32 (E2) - Body ground | Cable disconnected from negative (-) auxiliary battery terminal | Below 1 Ω | H14-33 (E1) - Body ground | Cable disconnected from negative (-) auxiliary battery terminal | Below 1 Ω | |
| *a | Front view of wire harness connector (to Airbag Sensor Assembly) | | |
(b) Reconnect the cable to the negative (-) auxiliary battery terminal.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection | Condition | Specified Condition |
H14-36 (IGR) - Body ground | Ignition switch ON | 11 to 14 V |
OK |
| REPLACE AIRBAG SENSOR ASSEMBLY |
NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) |
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Categories
Stop the vehicle completely.
Manual transaxle:
Shift into neutral and set the parking brake.
Automatic transaxle:
Shift the selector lever to the P position and set the parking brake.
Press the push button start to turn off the engine. The ignition position is
off.
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