Mazda CX-7 2007 Workshop Manual page 945

ON-BOARD DIAGNOSTIC [AW6A-EL, AW6AX-EL]
STEP
5 INSPECT TERMINAL SHIFT SOLENOID B FOR
POOR CONNECTION
• Disconnect the shift solenoid B connector.
• Inspect for poor connection (such as damaged/
pulled-out pins, corrosion).
• Are terminals normal?
6 INSPECT TERMINAL COUPLE COMPONENT
CIRCUIT FOR OPEN CIRCUIT
• Inspect for continuity between couple
component terminal B2 (wiring harness-side)
and shift solenoid A terminal A wiring harness-
side).
• Is there continuity?
7 INSPECT TERMINAL COUPLE COMPONENT
CIRCUIT FOR SHORT TO POWER
• Inspect for continuity between couple
component terminal B2 and all terminals
except B2 (wiring harness-side).
• Is there continuity?
8 VERIFY TROUBLESHOOTING OF DTC P0977
COMPLETED
• Make sure to reconnect all the disconnected
connectors.
• Clear the DTC from the memory using the
WDS or equivalent.
• Drive the vehicle in D range and make sure
that gears shift smoothly from 1GR to 6GR.
• Is same DTC present?
9 VERIFY AFTER REPAIR PROCEDURE
• Perform the "After Repair Procedure".
(See 05-02-4 AFTER REPAIR
PROCEDURE[AW6A-EL, AW6AX-EL].)
• Are any DTCs present?
End Of Sie
DTC P0978[AW6A-EL, AW6AX-EL]
DTC P0978 Shift solenoid C range/performance (stuck)
• Feedback current corresponding to solenoid current command value is irregular when engine is running.
Diagnostic support note:
• This is a continuous monitor (CCM).
• The MIL illuminates if the TCM detects the above malfunction condition during the first drive cycle.
DETECTION
• A PENDING CODE is not available.
CONDITION
• FREEZE FRAME DATA is available.
• The AT warning light illuminates.
• The DTC is stored in the TCM memory.
• ATF level low
• Deteriorated ATF
POSSIBLE
• Shift solenoid C stuck
CAUSE
• Control valve stuck
• TCM malfunction
INSPECTION
Yes Go to the next step.
No Replace the couple component, then go to Step 8.
Yes Go to the next step.
No Repair or replace the couple component, then go to Step 8.
Yes Repair or replace the couple component, then go to the
next step.
No Replace the control valve body, then go to the next step.
(See 05-17-38 CONTROL VALVE BODY REMOVAL/
INSTALLATION[AW6A-EL, AW6AX-EL].)
Yes Replace the TCM, then go to the next step.
(See 05-17-25 TCM REMOVAL/INSTALLATION[AW6A-EL,
AW6AX-EL].)
No Go to the next step.
Yes Go to the applicable DTC inspection.
(See 05-02-5 DTC TABLE[AW6A-EL, AW6AX-EL].)
No DTC troubleshooting completed.
ACTION
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