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3.Internal trouble
4. Power trouble
DIAGNOSTIC PROCEDURES
(1) Check battery
Is the battery voltage measured higher than 9V?
Yes: continue with next step.
No: low battery voltage, check the charging/discharging system.
See Chapter I, Charging System-Battery Checking
(2) Check the wire harness between battery and fuse box
Remove fuse box and turn the ignition switch ON, without loosening connector.
Measure and see if the electrical potential between two terminals of the fuse box is more than 9V.
Yes: continue with next step.
No: check the wire harness.
DTC B1620 Internal trouble of SRS uni
CAUTION
●
Condition for running the DTC is to inspect the diagnostic trouble code that
may not appear prior to this test. Performing this test may results in body injury or
damaged system due to misoperations. Therefore, preparations must be made
efore checking.
●
Internal circuit trouble of SRS ECU
Possible Cause Internal trouble of SRS unit
Operation
Replace the SRS unit, see SRS System, Removal & Installation of SRS Unit
Checking Conditions
DTC B1112 Low power source voltage of SRS ECU
CAUTION
Condition for running the DTC is to inspect the diagnostic trouble code that may not
appear prior to this test. Performing this test may results in body injury or damaged
system due to misoperations. Therefore, preparations must be made before
checking.
●
The electrical potential between pins 5 and 6 of the connector of SRS unit is
less than 9V.
●
Low battery voltage
Trouble in wire harness between battery and SRS ECU
Checking Conditions
Possible Cause
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