ABS (ANTI-LOCK BRAKE SYSTEM)
8-86
As an example, “10 digits/1 digit pattern” of tester reading is shown below.
EAS4S81021
[C] DETERMINING THE CAUSE AND LOCATION OF THE MALFUNCTION
EAS4S81022
[C-1] ONLY THE ABS WARNING LIGHT DOES NOT COME ON WHEN THE MAIN SWITCH IS
SET TO “ON”
1. Confirmation using the test coupler adaptor
Connect the test coupler adapter to the test coupler.
NOTE:
Check following the steps in sequence.
1. Wire harness is short-circuited to GND between the ABS ECU and meter (ABS warning
light).
Check by the following procedures.
1. Remove the ABS ECU and meter, and connect the ABS test coupler adaptor.
2. Check the conductivity between the white/red lead of test adaptor and GND.
3. If there is conductivity, the trouble is caused by the wire harness short-circuit. Repair or
replace the failure part.
2. Meter circuit malfunction
1. Remove only the ABS ECU from the connector.
2. If the ABS warning light comes on when the main switch is turned “ON”, the meter is nor-
mal. It means the ABS ECU malfunction. Replace the ECU.
EAS4S81023
[C-2] ABS WARNING LIGHT AND ALL OTHER INDICATORS DO NOT COME ON
NOTE:
Check following the steps in sequence.
1. Check the power supply system.
1. Check that the battery is connected correctly.
2. Check the battery voltage. (Refer to "CHECKING AND CHARGING THE BATTERY" on page
8-114.)
3. Check if the main fuse is blown. If the main fuse is blown, determine the cause and repair.
Replace with a new fuse. (Refer to "CHECKING THE FUSES" on page 8-113.)
2. Check the connections.
1. Check that the main fuse coupler is securely connected.
A. This example is the pattern which shows
malfunction code 12.
B. This example is the pattern which shows
malfunction code 21.
C. Time (second)
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