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Diagnostic procedure

WARNING: This page is about a different car, the 2005 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.
DTC P0704 [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.
No Record FREEZE FRAME DATA on repair order, then go to the next step.
2 VERIFY RELATED REPAIR INFORMATION AVAILABLY 
  • Check for related Service Bulletins and/or online repair information availably.
  • 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.
No Go to the next step.
3 INSPECT CLUTCH SWITCH SIGNAL CIRCUIT FOR SHORT TO GND 
  • Measure voltage between clutch switch connector terminal A and body GND.
  • Is voltage 0V  ?
 Yes Repair or replace harness for short to GND, then go to Step 8.
No Go to the next step.
4 INSPECT CLUTCH SWITCH CONNECTOR FOR POOR CONNECTION 
  • Turn the ignition switch off.
  • Disconnect clutch 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 13.
No Go to the next step.
5 INSPECT CLUTCH SWITCH GND CIRCUIT FOR OPEN CIRCUIT 
  • Check continuity between clutch switch terminal B (harness-side) and body GND.
  • Is there continuity?
 Yes Go to the next step.
No Repair or replace clutch switch connector GND circuit for open circuit, then go to Step 8.
6 INSPECT PCM CONNECTOR FOR POOR CONNECTION 
  • Turn the ignition switch off.
  • Disconnect PCM connector.
  • Check poor connection (damaged, pulled-out terminals, corrosion, etc.).
  • Is there any malfunction?
 Yes Repair terminal, then go to Step 8.
No Go to the next step.
7 INSPECT CLUTCH SWITCH SIGNAL CIRCUIT FOR OPEN CIRCUIT 
  • Disconnect clutch switch connector.
  • Check continuity between clutch switch connector terminal A (harness-side) and PCM terminal 4I (harness-side).
  • Is there continuity?
 Yes Go to the next step.
No Repair or replace harness for open circuit, then go to the next step.
8 VERIFY TROUBLESHOOTING OF DTC P0704 COMPLETED 
  • Make sure to reconnect all disconnected connectors.
  • Clear the DTC from the PCM memory using the WDS or equivalent.
  • Drive vehicle 30 km/h {18.6 mph} or more. 
  • Depress and release clutch pedal above 10 times  during driving.
  • Is same DTC present?
 Yes Replace PCM, then go to the next step.
No Go to the next step.
9 VERIFY AFTER REPAIR PROCEDURE  Yes Go to the applicable DTC inspection.
(See DTC TABLE )
No Troubleshooting completed.
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