Diagnostic procedure

DTC P2004 [BP, BP WITH TC] DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA HAS BEEN RECORDED Has FREEZE FRAME DATA been recorded?	Yes	Go to the next step.
1		No	Record FREEZE FRAME DATA on repair order, then go to the next step.
2	VERIFY RELATED REPAIR INFORMATION AVAILABILITY Check for related Service Bulletins and/or online repair information availability. Is any related repair information available?	Yes	Perform repair or diagnosis according to the available repair information. If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	INSPECT VTCS VACUUM SWITCH CONNECTOR FOR POOR CONNECTION Turn the ignition switch off. Disconnect VTCS vacuum switch connector. Check for poor connection (damaged/pulled-out terminals, corrosion, etc.). Is there any malfunction?	Yes	Repair or replace the terminal, then go to Step 10.
3		No	Go to the next step.
4	INSPECT VTCS VACUUM SWITCH GND CIRCUIT FOR OPEN CIRCUIT Turn the ignition switch off. Measure continuity between VTCS vacuum switch connector B and body GND. Is there continuity?	Yes	Go to the next step.
4		No	Repair or replace for open circuit, then go to Step 10.
5	INSPECT VTCS VACUUM SWITCH FOR BEING STUCK OPEN Inspect VTCS vacuum switch. (See VARIABLE TUMBLE CONTROL SYSTEM (VTCS) VACUUM SWITCH INSPECTION .) Is VTCS vacuum switch okay?	Yes	Go to the next step.
5		No	Replace VTCS vacuum switch, then go to Step 10.
6	INSPECT VTCS SOLENOID VALVE FOR BEING STUCK OPEN Inspect VTCS solenoid valve. (See VARIABLE TUMBLE CONTROL SYSTEM (VTCS) SOLENOID VALVE INSPECTION [BP, BP WITH TC] .) Is VTCS solenoid valve okay?	Yes	Go to the next step.
6		No	Replace VTCS solenoid valve, then go to Step 10.
7	INSPECT VACUUM LINES FOR LEAKAGE Inspect vacuum line. (See VACUUM HOSE ROUTING DIAGRAM [BP] ) (See VACUUM HOSE ROUTING DIAGRAM [BP WITH TC] ) Is vacuum lines okay?	Yes	Go to Step 10.
7		No	Repair or replace vacuum line, then go to Step 10.
8	INSPECT PCM CONNECTOR FOR POOR CONNECTION Turn the ignition switch off. Disconnect PCM connector. Check for poor connection at terminal 4J (damaged/pulled-out terminals, corrosion, etc.). Is there any malfunction?	Yes	Repair terminal, then go to Step 10.
8		No	Go to the next step.
9	INSPECT VTCS VACUUM SWITCH SIGNAL CIRCUIT FOR SHORT TO POWER Turn ignition key OFF. Turn ignition key to ON (engine OFF). Measure voltage between PCM terminal 4J and body GND. Is voltage B+ ?	Yes	Repair or replace harness for short to power, then go to Step 10.
9		No	Go to the next step.
10	VERIFY TROUBLESHOOTING OF DTC P2004 COMPLETED Make sure to connect all disconnected connectors. Clear the DTC from the PCM memory using the WDS or equivalent. Start engine. Is same DTC present?	Yes	Replace PCM, then go to the next step.
10		No	Go to the next step.
11	VERIFY AFTER REPAIR PROCEDURE Perform the "AFTER REPAIR PROCEDURE ". (See AFTER REPAIR PROCEDURE .) Is any DTC present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE .)
11		No	Troubleshooting completed.