Serial Data Link Circuit Check (No Communication to P/S Control Module)

Serial Data Link Circuit Check (No Communication to P/S Control Module)

Wiring Diagram










Troubleshooting

1.
Was "EPS System Check" performed?
YES -
Go to Step 2.
NO -
Go to EPS System Check EPS System Check:Electric Type.

2. SUZUKI scan tool condition check

Make sure that SUZUKI scan tool is free from malfunction and that correct program card (software) for P/S system is used.
Turn ignition switch to OFF position.
Check proper connection of SUZUKI scan tool to DLC.

Is connection in good condition?
YES -
Go to Step 3.
NO -
Connect SUZUKI scan tool to DLC properly.

3. SUZUKI scan tool operation check

Check if communication is possible by making communication with other controllers (BCM, ABS/ESP(R) control module or SDM) or other vehicles.

Is it possible to communicate with the other controllers?
YES -
Go to Step 4.
NO -
Repair open in common section of serial data circuit used by all controllers or short to ground or power circuit which has occurred somewhere in serial data circuit.

4. P/S control module power supply and ground circuit check

Check power supply circuit and ground circuit for P/S control module referring to P/S Control Module Power Supply and Ground Circuit Check P/S Control Module Power Supply and Ground Circuit Check:Electric Type.

Is check result in good condition?
YES -
Go to Step 5.
NO -
Repair or replace defective circuit.

5. Serial communication circuit check

With ignition switch turned OFF, disconnect "E11" connector from P/S control module.
Check proper connection at serial data circuit terminal.
If OK, then check for high resistance, open or short to power circuit or ground in serial data circuit for P/S system.

Is check result in good condition?
YES -
Substitute a known-good P/S control module and recheck.
NO -
Repair serial data circuit for P/S system.