DTC P1570 (No.21): ABS Signal Circuit Malfunction
Wiring Diagram
1. ABS control module 2. ECM
DTC Detecting Condition and Trouble Area
DTC detecting condition Trouble area
ABS signal input is low when engine start.
ABS signal circuit short to ground
ABS control module
DTC Confirmation Procedure
1) Clear DTC, start engine and keep it at idle for 1 min.
2) Select “DTC” mode on scan tool and check DTC.
DTC Troubleshooting
Step Action YES NO
Was “Engine and Emission Control System Check” performed?
Go to Step 2.
Signal voltage check
1) With the ignition switch ON position, check voltage between “E115-30” terminal of ECM coupler and ground.
Is voltage within 10 – 14 V?
Intermittent trouble. If OK, substitute a known-good ECM and recheck.
Go to Step 3.
Signal circuit check
1) Disconnect ABS control module connector with ignition switch OFF.
2) Measure resistance between “GRN” wire terminal of ABS control module connector and body ground.
Is resistance infinity?
Go to Step 4.
“GRN” wire is shorted ground.
DTC check
1) Disconnect coupler of ABS control module.
2) Clear DTC.
3) Start engine and check DTC.
Is DTC P1570 (No.21) detected?
Substitute a known-good ECM and recheck.
Substitute a known-good ABS control module and recheck.