Mazda MX-6 1998, Workshop Manual

Page: 695 / 1282

TROUBLESHOOTING [LA4A-EL]
STEP
INSPECTION
ACTION
D4 CHECK TR SWITCH CIRCUIT FOR SHORTS TO
POWER AND GROUND
• Breakout box installed, PCM disconnected.
• TR switch connector disconnected.
• Refer to connector of TR switch.
xt
TR Switch Connector Component
• Measure resistance between PCM test pin 64
and PCM test pins 71, 97, 24, 51, 7 7 ,1 0 3 and
91 at the breakout box.
• Measure resistance between PCM test pin 64
at the breakout box and chassis ground.
• Is each resistance greater than 10,000 ohms?
Yes Go to next step.
No
Service short circuit.
Remove breakout box.
Reconnect all components.
Erase DTCs.
Rerun OBD test.
D5
CHECK TR SWITCH RESISTANCE
• Disconnect TR switch connector.
• Connect MLP-D harness adapter to TR switch
and transaxle tester.
• Install MLP-D overlay onto transaxle tester.
• Use the procedures outlined in the tester
manual to measure the resistance between TR
and SRTN of the TR switch, verify the switch
resistance value in all gear positions.
xt
0 5 -1 7A ELECTRICAL SYSTEM
COMPONENTS [LA4A-EL], MLP Tester
Instruction, TR switch resistance tests.
• Are the resistive value within specifications?
Yes Replace PCM.
Erase DTCs.
Rerun OBD tests, then go to next step.
No Replace TR switch and adjust.
Erase DTCs and rerun OBD test.
D6 CHECK PARK/NEUTRAL CIRCUITS OF TR
SWITCH
• Using the procedures outlined in the tester
manual, check the park/neutral circuits of TR
switch in all gear positions.
• Monitor the status light on the tester for proper
indications.
Yes
Service as required.
Go to next step.
Park/neutral circuit
Terminal
Selector
lever
position
A good switch will
indicate
64
and
91
P Less than 5 ohms
R
Greater than 100K ohms
N Less than 5 ohms
D Greater than 100K ohms
2 Greater than 100K ohms
1 Greater than 100K ohms
No Replace TR switch and adjust.
Erase DTCs and rerun OBD test.
W6U501WA2
• Do the park/neutral circuits operate properly
and only in the proper gear position?_________
0 5 -0 1 A -2 0