Diagnostic Procedure

STEP	INSPECTION		ACTION
1	INSPECT BATTERY VOLTAGE Is the battery terminal voltage normal?	Yes	Make sure that battery terminal connection is okay. Go to the next step.
1		No	Charge or replace the battery, then go to Step 6.
2	INSPECT BATTERY GRAVITY Is the battery specific gravity as specified?	Yes	Go to the next step.
2		No	Replace the battery, then go to Step 6.
3	INSPECT CHARGING SYSTEM Are the generator and drive belt tension normal?	Yes	Go to the next step.
3		No	Replace the generator and/or drive belt if necessary. Go to step 6.
4	INSPECT EHPAS CM POWER SUPPLY CIRCUIT FOR OPEN OR SHORT CIRCUIT Start the engine. Measure the voltage between following EHPAS CM terminal (wiring harness-side) and ground. EHPAS CM: 1B-ground Is the voltage 9 V or more ?	Yes	Go to the next Step.
4		No	Repair or replace the wiring harness (including fuse) between the EHPAS CM and ground, then go to Step 6.
5	INSPECT EHPAS CM GROUND CIRCUIT FOR POOR GROUND OR OPEN CIRCUIT Switch the ignition OFF (LOCK). Measure the resistance between the following EHPAS CM terminal (wiring harness-side) and ground. EHPAS CM: 1A-ground Is the resistance within 0-1 ohm ?	Yes	Go to the next step.
5		No	If there is no continuity: Repair or replace the wiring harness for open circuit between the EHPAS CM and ground, then go to the next step. If the resistance is not within 0-1 ohm : Repair or replace the wiring harness for poor ground, then go to the next step.
6	VERIFY THAT THE SAME DTC IS NOT PRESENT Make sure to reconnect all disconnected connectors. Clear the DTC from the memory. (See ELECTRO HYDRAULIC POWER ASSIST STEERING (EHPAS) ON-BOARD DIAGNOSIS .) Is the same DTC present?	Yes	Replace the electric power steering oil pump component, then go to the next step. (See ELECTRIC POWER STEERING OIL PUMP COMPONENT REMOVAL/INSTALLATION .)
6		No	Go to the next step.
7	VERIFY THAT NO OTHER DTCS ARE PRESENT Are any other DTCs output?	Yes	Go to the applicable DTC inspection. (See ELECTRO HYDRAULIC POWER ASSIST STEERING (EHPAS) ON-BOARD DIAGNOSIS .)
7		No	DTC troubleshooting completed.