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
VERIFY CURRENT INPUT SIGNAL STATUS-IS
CONCERN INTERMITTENT OR CONSTANT
• Turn ignition key to OFF.
• Connect NGS tester to DLC.
• Turn ignition key to ON (engine OFF).
• Access TR SW, D SW, S SW, L SW, and R
SW PIDs using NGS tester.
— TRSW
• N or P position: ON
• Other positions and all ranges: OFF
— RSW
• R position: ON
• Other positions and ail ranges: OFF
— DSW
• D range: ON
• Other ranges and all positions: OFF
— SSW
• S range: ON
• Other ranges and all positions: OFF
— LSW
• L range: ON
• Other ranges and all position: OFF
• Are two or more of above PIDs ON at the
same time when shifting selector lever from P
position to L range?
Yes Go to next step.
No
Go to intermittent concern troubleshooting procedure.
(See F1 -142 INTERMITTENT CONCERN.)
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3 INSPECT TR SWITCH CONNECTOR
• Turn ignition key OFF.
• Disconnect TR switch connector.
• Inspect for bent terminals of pins using
mirror.
• Are TR switch terminals okay?
Yes Go to next step.
No
Repair terminals or replace TR switch, then go to Step 7.
(See K2-31 TRANSAXLE RANGE (TR) SWITCH
REMOVALVINSTALLATION.)
4
INSPECT TR SWITCH CIRCUIT
MALFUNCTION
• Turn ignition key to ON (engine OFF).
• Access TR SW, D SW, S SW, L SW, and R
SW PIDs using NGS tester.
• Does PIDs change from ON to OFF when TR
switch connector is disconnected?
Yes Go to next step.
No Go to Step
6
. i
5 INSPECT TR SWITCH CONTINUITY
• Turn ignition key to OFF.
• Disconnect TR switch connector.
• Inspect TR switch for continuity in
positions/ranges failed in Step 2.
• Is there continuity between TR switch
terminals (part-side)?
(See K2-30 TRANSAXLE RANGE (TR) SWITCH
INSPECTION.)
Yes Go to Step 7.
No Replace TR switch, then go to Step 7.
(See K2-31 TRANSAXLE RANGE (TR) SWITCH
REMOVAL/INSTALLATION.)
6
INSPECT TR SWITCH CIRCUIT FOR SHORT
TO POWER
• Turn ignition key to ON (engine OFF).
• Measure voltage at TR switch terminals C, E,
F and G (harness-side).
• Is there 0 V at TR switch harness side
connector?
Yes Go to next step.
No Repair or replace wiring, then go to next step.
K 2-70