Auto Repair

Tiny
DAVE A.
  • MEMBER
  • 1999 MAZDA PROTEGE
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 138,000 MILES
When driving my 1999 Mazda Protege over 60 km the od off light comes on and the transmission down shift.I have replaced the transmission range switch, but the problem still exist. Help please.
Do you
have the same problem?
Yes
No
Saturday, December 25th, 2010 AT 3:54 PM

3 Replies

Tiny
KHLOW2008
  • EXPERT
An error has been detected in the transmission control system. Get a scan done and let me know the EXACT trouble code.

Is the speedometer working correctly?
Do you have any other noticeable malfunctions?
Was this
answer
helpful?
Yes
No
Saturday, December 25th, 2010 AT 5:13 PM
Tiny
DAVE A.
  • MEMBER
Trouble code 0P705 Transmission Range Sensor A Circuit PRNDL Input. Yes the speedometer is working correctly.
Was this
answer
helpful?
Yes
No
Saturday, December 25th, 2010 AT 9:00 PM
Tiny
KHLOW2008
  • EXPERT
After replacement of the switch, is the trouble code the same?
Was the switch adjusted correctly?
Were the wiring circuit tested?

Here are the diagnostic procedures.

DTC P0705: TRANSAXLE RANGE SWITCH CIRCUIT (SHORT CIRCUIT)
Condition
TR switch inputs 2 or more signals to PCM or input voltage is shorted to battery voltage when engine speed is more than 530 RPM during failure detection. Possible cause:

TR switch malfunction.
Damaged wiring or connectors between TR switch and PCM.
PCM malfunction.

Diagnosis & Repair

1. Record FREEZE FRAME PID data. Ensure all applicable connections are clean and tight. Repair as needed. After repairs, go to next step.

2. Inspect TR switch PIDs. Using scan tool, select D SW, S SW, L SW, TR SW ("P" or "N" position), and R SW. Verify PID status. PIDs should change from off to on when selector lever is moved. If PIDs change as specified, go to step 5. If PIDs do not change as specified, go to next step.

3. Disconnect 9-pin TR switch harness connector. Check for continuity in transaxle range switch internal circuits. See TRANSMISSION RANGE SWITCH under COMPONENT TESTS. Replace as needed. If TR switch is okay, go to next step.

4. With TR switch harness connector disconnected, measure voltage between ground and terminals "C", "E", "F" and "G" on harness connector. No voltage should be present. If circuit voltage is as specified, go to next step. If circuit voltage is not as specified, repair suspect circuit for short to voltage.

5. Ensure scan tool is connected to DLC. Connect all disconnected harness connectors. Turn ignition on. Clear DTCs. Start engine. Drive or operate vehicle in each selector lever position for at least 2 minutes. Stop vehicle and retrieve DTCs. If DTC P0705 is still present, inspect PCM. See appropriate PIN VOLTAGE CHARTS/PID VALUE
CHARTS/PID VALUE CHARTS article in ENGINE PERFORMANCE. If PCM fails test, replace PCM. If DTC is no longer present, system is okay.
Was this
answer
helpful?
Yes
No
Sunday, December 26th, 2010 AT 10:31 AM

Please login or register to post a reply.

Recommended Guides