Mazda 2002 6 Workshop Manual page 497

Diagnostic procedure
STEP
1 VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED
• Has FREEZE FRAME PID DATA been
recorded?
2 VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
• Check for related Service Bulletins availability.
• Is any related repair information available?
3 INSPECT ATX CONNECTOR FOR POOR
CONNECTION
• Turn ignition key to OFF.
• Disconnect ATX connector.
• Check for poor connection (damaged/pulled-
out terminals, corrosion, etc.).
• Is connection okay?
4 INSPECT RESISTANCE
• Check resistance between ATX connector
terminal A (transaxle case side) and body
ground.
• Is resistance within 1.0—4.2 ohms?
(See K–26 Resistance Inspection (On-Vehicle
Inspection).)
5 INSPECT SHIFT SOLENOID A CONNECTOR
FOR POOR CONNECTION
• Disconnect shift solenoid A connector.
• Check for poor connection (damaged/pulled-
out terminals, corrosion, etc.).
• Is connection okay?
6 INSPECT RESISTANCE
• Inspect resistance between shift solenoid A
terminals A and B (part-side).
• Is resistance within 1.0—4.2 ohms?
(See K–27 Resistance Inspection (Off-Vehicle
Inspection).)
7 INSPECT PCM CONNECTOR FOR POOR
CONNECTION
• Disconnect PCM connector.
• Check for poor connection (damaged/pulled-
out terminals, corrosion, etc.).
• Is connection okay?
8 INSPECT ATX CONNECTOR CIRCUIT FOR
OPEN
• Inspect for continuity between PCM terminal
4AB (harness-side) and ATX connector
terminal A (vehicle harness-side).
• Is there continuity between terminals?
9 INSPECT ATX CONNECTOR CIRCUIT FOR
SHORT TO POWER
• Turn ignition key to ON (engine OFF).
• Inspect voltage at ATX connector terminal A
(vehicle harness-side).
• Is voltage 0 V?
10 INSPECT PCM CIRCUIT FOR SHORT TO
GROUND
• Turn ignition key to OFF.
• Inspect for continuity between PCM terminal
4AB (harness-side) and body ground.
• Is there continuity?
K–86
ON-BOARD DIAGNOSTIC
INSPECTION
Yes Go to next step.
No Record FREEZE FRAME PID DATA on repair order, then
go to next step.
Yes Perform repair or diagnosis according to available repair
information.
• If vehicle is not repaired, go to next step.
No Go to next step.
Yes Go to next step.
No Repair or replace connector and/or terminals, then go to
Step 11.
Yes Go to Step 7.
No Go to next step.
Yes Go to next step.
No Repair or replace connector and/or terminal, then go to
Step 11.
Yes Replace solenoid harness, then go to Step 11.
No Verify shift solenoid A installation.
• If solenoid installed correctly, replace solenoid, then go
to Step 11.
(See K–28 SOLENOID VALVE REMOVAL/
INSTALLATION.)
Yes Go to next step.
No Repair or replace connector and/or terminals, then go to
Step 11.
Yes Go to next step.
No Repair or replace harness, then go to Step 11.
Yes Go to next step.
No Repair or replace harness, then go to Step 11.
Yes Repair or replace harness, then go to Step 11.
No Go to next step.
ACTION