Mazda 626 Station Wagon, Workshop Manual

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ON-BOARD DIAGNOSTIC
Diagnostic procedure
STEP
INSPECTION
ACTION
1 VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
• Check for related Service Information
availability.
• Is any related Service 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.
2 CUCK TEST OF SHIFT SOLENOID B
• Turn ignition key to OFF.
• Connect NGS tester to DLC.
• Turn ignition key to ON (engine OFF).
• Access SHIFT B PID using NGS tester.
• Verify the click sound of shift solenoid B
using NGS simulation function.
• Is there a click sound?
(See K2-134 SIMULATION TEST.)
Yes Go to intermittent concern troubleshooting procedure.
(See F1-142 INTERMITTENT CONCERN.)
No Go to next step.
3 INSPECT POOR CONNECTION OF ATX
CONNECTOR
• Turn ignition key to OFF.
• Disconnect ATX connector.
• Check 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 ATX connector
terminal C (transaxle case side) and body
ground.
• Is resistance w ithin 1.0—4.2 £2?
(See K2-38 SOLENOID VALVES INSPECTION,
Inspection of Resistance (On-vehicie).)
Yes Go to Step 7.
No Go to next step.
5
INSPECT POOR CONNECTION OF SHIFT
SOLENOID B CONNECTOR
• Disconnect shift solenoid B connector.
• Check for poor connection (damaged/
pulled-out terminals, corrosion, etc.).
• Is connection okay?
Yes Go to next step.
No Repair or replace connector and/or terminal, then go to
Step 11.
6 INSPECT RESISTANCE
• Inspect resistance between shift solenoid B
terminals A and B (part-side).
• Is resistance w ithin 1.0—4.2 £2?
(See K2-38 SOLENOID VALVES INSPECTION,
Inspection of Resistance (Off-vehicle).)
Yes Replace solenoid harness, then go to Step 12.
No
Verify shift solenoid B installation.
• If solenoid installed correctly, replace solenoid, then
go to Step 11.
(See K2-40 SOLENOID VALVES
REMOVAL/INSTALLATION.)
7 INSPECT POOR CONNECTION OF PCM
CONNECTOR
• Disconnect PCM connector.
• Check 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.
8 INSPECT ATX CONNECTOR CIRCUIT FOR
OPEN
• Inspect for continuity between PCM terminal
99 (harness-side) and ATX connector
terminal C (vehicle harness-side).
• Is there continuity between terminals?
Yes Go to next step.
No Repair or replace harness, then go to Step 11.
9
INSPECT ATX CONNECTOR CIRCUIT FOR
SHORT TO POWER
• Turn ignition key to ON (engine OFF).
• Check for voltage at ATX connector terminal
C (vehicle harness-side).
• Is voltage 0 V?
Yes Go to next step.
No Repair or replace harness, then go to Step 11.
K2-109