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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 P0758 DIAGNOSTIC PROCEDURE

STEP INSPECTION ACTION
1 VERIFY FREEZE FRAME DATA HAS BEEN RECORDED 
  • Has FREEZE FRAME PID DATA been recorded?
 Yes Go to next step.
No Record FREEZE FRAME PID DATA on repair order, then go to next step.
2 VERIFY RELATED REPAIR INFORMATION AVAILABILITY 
  • Inspect for related Service Bulletins and/or online repair information availability.
  • Is any related repair information available?
 Yes Perform repair or diagnosis according to available repair information.
  • If vehicle is not repaired, go to next step.
No Go to next step.
3 INSPECT SOLENOID CONNECTOR FOR POOR CONNECTION 
  • Disconnect solenoid connector.
  • Inspect for poor connection (damaged, pulled-out terminals, corrosion, etc.).
  • Is connection okay?
 Yes Go to next step.
No Repair or replace connector and/or terminals, then go to Step 11.
4 INSPECT RESISTANCE 
  • Inspect resistance between solenoid connector terminal A (transmission case side) and body ground.
  • Is resistance within 11-15 ohms  ?

    (See SOLENOID VALVES INSPECTION .)

 Yes Go to Step 7.
No Go to next step.
5 INSPECT SHIFT SOLENOID CONNECTOR FOR POOR CONNECTION 
  • Disconnect shift solenoid connector.
  • Inspect for connection (damaged, pulled-out terminals, connection, etc.).
  • Are terminals okay?
 Yes Go to next step.
No Repair or replace connector and/or terminals, then go to Step 11.
6 INSPECT RESISTANCE 
  • Inspect resistance between shift solenoid connector terminal A (part-side) and body ground.
  • Is resistance within 11-15 ohms  ?
 Yes Replace solenoid harness, then go to Step 11.
No Verify shift solenoid B installation.
7 INSPECT SOLENOID CONNECTOR CIRCUIT FOR SHORT TO POWER 
  • Turn ignition key to ON (engine off).
  • Inspect voltage at solenoid connector terminal A.
  • Is voltage 0 V  ?
 Yes Go to next step.
No Repair or replace harness, then go to Step 11.
8 INSPECT TCM CONNECTOR FOR POOR CONNECTION 
  • Disconnect TCM connector.
  • Inspect for poor connection (damaged, pulled-out terminals, corrosion, etc.).
  • Is there continuity between terminals?
 Yes Go to next step.
No Repair or replace connector and/or terminals, then go to Step 11.
9 INSPECT SOLENOID CONNECTOR CIRCUIT FOR OPEN CIRCUIT 
  • Inspect for continuity between solenoid connector terminal A (vehicle harness-side) and TCM connector terminal AN.
  • Is there continuity between terminals?
 Yes Go to next step.
No Repair or replace harness, then go to Step 11.
10 INSPECT SOLENOID CONNECTOR CIRCUIT FOR SHORT TO GROUND 
  • Inspect for continuity between solenoid connector terminal B (harness side) and body ground.
  • Is there continuity?
 Yes Repair or replace harness, then go to Step 11.
No Go to next step.
11 VERIFY TROUBLESHOOTING OF DTC P0758 COMPLETED 
  • Make sure to reconnect all disconnected connectors.
  • Clear DTC from memory using WDS or equivalent.
  • Drive vehicle in D range and make sure that gears shift smoothly from 1GR to 4GR.
  • Is same DTC present?
 Yes Replace TCM, then go to next step.
(See TRANSMISSION CONTROL MODULE (TCM) REMOVAL/INSTALLATION .)
No Go to next step.
12 VERIFY AFTER REPAIR PROCEDURE  Yes Go to applicable DTC inspection.
No Troubleshooting completed.
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