Mazda 626 Station Wagon, Workshop Manual

Page: 298 / 577

ON-BOARD DIAGNOSTIC
STEP
INSPECTION
ACTION
4 INSPECT LINE PRESSURE
• Start engine.
• Measure line pressure.
Specification
Idle: 334— 470 kPa {3.4— 4.8 kgf/cm2,
49—68 psi}
Stall: 1,158—1,323 kPa {11.8—13.5 kgf/cm2,
168—191 psi}
• Is line pressure within specification?
(See K2-21 MECHANICAL SYSTEM TEST, Line
Pressure Test.)
Yes Go to next step.
No
• All ranges: Replace oil pump or control valve body,
then go to Step 6.
(See K2-46 CONTROL VALVE BODY REMOVAL.)
(See K2-46 CONTROL VALVE BODY INSTALLATION.)
(See ATX Workshop Manual FN4A-EL [1623-10-98E].)
• Any ranges: Replace ATX, then go to Step 6.
(See K2-41 AUTOMATIC TRANSAXLE (ATX)
REMOVAL/INSTALLATION.)
5 CHECK OPERATION OF EACH VALVE AND
EACH SPRING
• Turn ignition key to OFF.
• Remove control valve body.
• Disassemble control valve body.
• Is each valve operation okay and is return
spring okay?
(See K2-46 CONTROL VALVE BODY
REMOVAL.)
(See K2-46 CONTROL VALVE BODY
INSTALLATION.)
(See ATX Workshop Manual FN4A-EL
[1623-10-98E].)
Yes Replace ATX, then go to next step
(See K2-41 AUTOMATIC TRANSAXLE
REMOVAL/INSTALLATION.)
No
Repair or replace shift valve and return spring, then go to
next step.
(See K2-46 CONTROL VALVE BODY REMOVAL.)
(See K2-46 CONTROL VALVE BODY INSTALLATION.)
(See ATX Workshop Manual FN4A-EL [1623-10-98E].)
6 VERIFY TROUBLESHOOTING OF DTC P0741
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear DTC from memory using NGS tester.
• Start engine.
• Warm up engine and ATX.
• Access ATFT, 4GR, D SW, RPM, TURBINE,
VS, THOP, SHIFT E and SHIFT A PIDs using
NGS tester.
• Drive vehicle under following conditions for
15 seconds or more while monitoring PIDs.
— ATFT PID: 20 ° C {68 * F} or above
— 4GR PID: ON
— D SW PID: ON
— RPM PID: 450 rpm or above
— TURBINE PID: within 225—4,988 rpm
— VS PID: within 60—100 km/h {37—62
mph}.
— SHIFT E PID: ON (TCC operation).
— SHIFT A PID: 99%.
• Is same DTC present?
Yes Replace PCM, then go to next step.
(See Section F1.)
No Go to next step.
7 VERIFY AFTER REPAIR PROCEDURE
• Perform “After Repair Procedure”.
(See K2-61 AFTER REPAIR PROCEDURE.)
• Is there any DTC present?
Yes Go to applicable DTC inspection.
No
Troubleshooting completed.
K2-91