Mazda 626 Station Wagon, Workshop Manual

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ON-BOARD DIAGNOSTIC
STEP INSPECTION ACTION
5 INSPECT LINE PRESSURE
• Start engine.
• Measure line pressure.
Specification
Idle: 334— 470 kPa {3.4— 4.8 kgf/cm2,
49—68 psl}
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 9.
(See ATX Workshop Manual FN4A-EL [1623-10-98E].)
• Any ranges: Replace ATX, then go to Step 9.
(See K2-41 AUTOMATIC TRANSAXLE (ATX)
REMOVAL/INSTALLATION.)
6 INSPECT STALL SPEED
• Measure stall speed at D range.
Specification
2,200 — 2,500 rpm
• Is stall speed within specification?
(See K2-21 MECHANICAL SYSTEM TEST, Stall
Test.)
Yes Go to next step.
No Go to Step 8.
7 INSPECT TURBINE SPEED WHEN DRIVING
WITH VEHICLE SPEED 40 KM/H IN D RANGE
• Turn ignition key to OFF.
• Connect NGS tester to DLC.
• Start engine.
• Access VS, D SW, 2GR, THOP, and
TURBINE PIDs using NGS tester.
• Drive vehicle while monitoring PIDs.
— VS PID: 40 km/h {24 mph}
— D SW PID: ON
— 2GR PID: ON
— THOP PID: 25%
• Is TURBINE PID okay?
TURBINE PID: Approx. 2,173 rpm
Yes Go to next step.
No Replace control valve body, then go to next step.
(See K2-46 CONTROL VALVE BODY REMOVAL.)
(See K2-46 CONTROL VALVE BODY INSTALLATION.)
8
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].)
9
VERIFY TROUBLESHOOTING OF DTC P0732
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear DTC from memory using NGS tester.
• Start engine.
• Warm up ATX.
• Access ATFT, 2GR, D SW, RPM, TURBINE,
THOP, and VS 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
— 2GR PID: ON
— DSW PID :ON
— RPM PID: 450 rpm or above
— TURBINE PID: within 225 — 4,988 rpm
— THOP PID: 6.25 % or above.
— VS PID: 3.9 km/h {2.4 mph} or above
• Is same DTC present?
Yes Replace PCM, then go to next step.
(See Section F1.)
No Go to next step.
K 2-85