DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK CAN COMMUNICATION SYSTEM
CHECK HARNESS AND CONNECTOR (DLC3 - ECM)
CHECK HARNESS AND CONNECTOR (DLC3 - BODY GROUND)
CHECK HARNESS AND CONNECTOR (TC OF ECM - BODY GROUND)
AIRBAG SYSTEM - Diagnosis Circuit
DESCRIPTION
DTC output mode is set by connecting terminals TC and CG of the DLC3.
DTCs are output by the blinking of the SRS warning light.
When each warning light stays blinking, a ground short in the wiring of terminal TC of the DLC3 or an internal ground short in each ECU is suspected.
A DTC output mode signal is transmitted through the CAN communication system to each ECU including the center airbag sensor. Thus, when all systems do not enter DTC output mode, there may be an ECM malfunction.
WIRING DIAGRAM
INSPECTION PROCEDURE
After turning the ignition switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work ().
When disconnecting the cable, some systems need to be initialized after the cable is reconnected ().
| 1.CHECK CAN COMMUNICATION SYSTEM |
Check if a CAN communication system DTC is output.
Result| Result | Proceed to |
| DTC is not output | A |
| DTC is output (for LHD) | B |
| DTC is output (for RHD) | C |
| | REPAIR CIRCUITS INDICATED BY OUTPUT DTCS ()
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| | REPAIR CIRCUITS INDICATED BY OUTPUT DTCS ()
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| 2.CHECK HARNESS AND CONNECTOR (DLC3 - ECM) |
Turn the ignition switch off.
Disconnect the A38 connector from the ECM.
for LHD:
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
- for 1GR-FE, 1UR-FE, 3UR-FE:
| Tester Connection | Condition | Specified Condition |
| E22-13 (TC) - A38-16 (TC) | Always | Below 1 Ω |
- for 1VD-FTV:
| Tester Connection | Condition | Specified Condition |
| E22-13 (TC) - A38-27 (TC) | Always | Below 1 Ω |
for RHD:
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
- for 1GR-FE, 1UR-FE, 3UR-FE:
| Tester Connection | Condition | Specified Condition |
| E22-13 (TC) - A52-16 (TC) | Always | Below 1 Ω |
- for 1VD-FTV:
| Tester Connection | Condition | Specified Condition |
| E22-13 (TC) - A52-27 (TC) | Always | Below 1 Ω |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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| 3.CHECK HARNESS AND CONNECTOR (DLC3 - BODY GROUND) |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| E22-4 (CG) - Body ground | Always | Below 1 Ω |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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| 4.CHECK HARNESS AND CONNECTOR (TC OF ECM - BODY GROUND) |
for LHD:
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
- for 1GR-FE, 1UR-FE, 3UR-FE:
| Tester Connection | Condition | Specified Condition |
| A38-16 (TC) - Body ground | Always | 1 MΩ or higher |
- for 1VD-FTV:
| Tester Connection | Condition | Specified Condition |
| A38-27 (TC) - Body ground | Always | 1 MΩ or higher |
for RHD:
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
- for 2UZ-FE, 3UR-FE:
| Tester Connection | Condition | Specified Condition |
| A52-16 (TC) - Body ground | Always | 1 MΩ or higher |
- for 1GR-FE, 1VD-FTV:
| Tester Connection | Condition | Specified Condition |
| A52-27 (TC) - Body ground | Always | 1 MΩ or higher |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR OR EACH ECU |
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| OK | |
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| REPLACE CENTER AIRBAG SENSOR ASSEMBLY ()
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