Part 2
Incorrect gear ratio (Continued)
Fault-tracing information
The cause of the diagnostic trouble code (DTC) was loose connections in the transmission connector.
Continue - Verification
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Replacing component
- Ignition off.
Try a new transmission speed sensor according to Replacing the engine speed (RPM) sensor Service and Repair.
Continue - Verification
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Checking transmission speed sensor signal cable (-)
- Ignition off.
- Disconnect control module.
Connect an ohmmeter between:
- #36 and #1 on the breakout box (Fenix 5.1)
- #24 and #1 on the breakout box (EMS 2000).
The ohmmeter should read infinite resistance.
OK - Checking signal from transmission speed sensor
Not OK - Checking transmission speed sensor
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Checking transmission speed sensor
- Ignition off.
- Disconnect transmission speed sensor.
Connect an ohmmeter between white 2-pin vehicle speed sensor (VSS) connector terminal 1 (vehicle speed sensor (VSS) side) and ground.
The ohmmeter should read infinite resistance.
OK - Checking for a short-circuit
Not OK - Replacing component
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Checking for a short-circuit
Check cable between vehicle speed sensor (VSS) connectors:
- terminal 1 and control module #36 (Fenix 5.1)
- terminal 1 and control module #24 (EMS 2000)
for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Continue - Verification
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Checking signal from transmission speed sensor
- Ignition off.
- Connect control module.
- Ignition on.
- Raise car so that front wheels can rotate freely.
- Connect a frequency meter between #8 and #36 for Fenix 5.1 or #11 and #24 for EMS 2000 on the breakout box.
- Engine idling.
- Shift the gear selector to position D so the front wheels start to rotate
- Increase the engine speed (RPM) to approximately 2000 rpm and keep it steady.
Note! When the rear wheels are stationary and the front wheels rotate, diagnostic trouble codes (DTCs) may be stored in the ABS system. Erase any diagnostic trouble codes (DTCs) stored in the ABS system after fault-tracing.
The multimeter (frequency meter) should give a stable reading (Hz) when the speed is steady.
Note! Ensure that the front wheels are not rotating when the gear selector is moved.
Is the frequency stable?
Yes - Checking resistance in solenoid S1 and S2 circuits
No - Checking vehicle speed sensor (VSS) resistance
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Checking vehicle speed sensor (VSS) resistance
- Ignition off.
- Disconnect control module.
Connect an ohmmeter between:
- #8 and #36 on the breakout box (Fenix 5.1)
- #11 and #24 on the breakout box (EMS 2000).
The ohmmeter should read 300-600 ohms.
OK - Checking for sources of interference
Not OK - Checking transmission speed sensor connector
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Checking for sources of interference
Check that the transmission speed sensor cables are not too near sources of interference, such as electric motors, ignition cables, mobile telephone cables etc. and that the transmission speed sensor is not loose.
Continue - Test driving
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Checking transmission speed sensor connector
- Ignition off.
- Check transmission speed sensor connector for contact resistance and oxidation and remedy according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
- Connect transmission speed sensor connector.
Connect an ohmmeter between:
- #8 and #36 on the breakout box (Fenix 5.1)
- #11 and #24 on the breakout box (EMS 2000).
The ohmmeter should read 300-600 ohms.
OK - Fault-tracing information
Not OK - Replacing component
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Fault-tracing information
The cause of the diagnostic trouble code (DTC) was loose connections in the transmission speed sensor connector.
Continue - Verification
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Replacing component
- Ignition off.
Try a new transmission speed sensor according to Replacing the speed sensor .
Continue - Verification
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Checking resistance in solenoid S1 and S2 circuits
- Ignition off.
- Disconnect control module.
Connect an ohmmeter between the breakout box terminals:
- #17 and #1, solenoid S1
- #31 and #1, solenoid S2
The ohmmeter should read 12-18 ohms.
OK - Checking the control module
Not OK - Checking for contact resistance and oxidation
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Checking for contact resistance and oxidation
Check transmission connector for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Continue - Test driving
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Checking the control module
- Ignition off.
- Reinstall connectors, components etc.
- Ignition on.
- Erase diagnostic trouble codes (DTCs).
Test drive the car. When test driving the car the oil temperature should be over +20°C and the throttle opening more than 5 %.
Gear selector in position 3, speed approximately 60 km/h. Maintain throttle opening at approximately 10 % and drive with constant throttle position (engine speed (RPM) over 1400 rpm).
- Stop car.
Continue - Checking the control module (continued)
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Checking the control module (continued)
Check to see if the diagnostic trouble code (DTC) has been stored again.
Has the diagnostic trouble code (DTC) been stored again?
Yes - Replacing component
No - Test driving
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Replacing component
- Ignition off.
Try a new control module according to Replacing the transmission control module (TCM) .
Continue - Checking component
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Test driving
- Ignition on.
- Erase any diagnostic trouble codes (DTCs).
Test-drive the car as described in Test Drive Form, description Test Drive Form, Description. Recreate the driving conditions that prevailed when the diagnostic trouble code was set. Keep an eye on the automatic gearbox warning lamp. If the warning lamp begins to flash, a diagnostic trouble code has been stored. Take immediate note of any discrepancy in gearbox function and operation before and after the warning lamp begins to flash.
Note! If the diagnostic trouble code (DTC) is stored permanently, the transmission control module (TCM) activates the emergency "Limp Home" program. The transmission will not operate normally. See Emergency programs Emergency Programs In The Event Of A Fault for "Limp Home" symptoms.
Is the transmission exhibiting any obvious mechanical malfunctions or making a noise?
Yes - Replacing component
No - Fault-tracing information
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Checking component
- Ignition on.
- Erase diagnostic trouble codes (DTCs).
Test drive the car. When test driving the car the oil temperature should be over +20°C and the throttle opening more than 5 %.
Gear selector in position 3, speed approximately 60 km/h. Maintain throttle opening at approximately 10 % and drive with constant throttle position (engine speed (RPM) over 1400 rpm).
- Stop car.
Continue - Checking component (continued)
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Checking component (continued)
Check to see if the diagnostic trouble code (DTC) has been stored again.
Has the diagnostic trouble code (DTC) been stored again?
Yes - Replacing component
No - Fault-tracing information
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Replacing component
- Ignition off.
Try a new transmission according to Removing / installing the transmission Removal and Replacement.
Continue - Verification
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Fault-tracing information
Transmission is OK.
Continue - FAULT FOUND
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Fault-tracing information
Old control module was defective.
Continue - FAULT FOUND
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Verification
Verification
Hint: After repairs have been completed they must be verified as follows to ensure that the fault has been eliminated:
- Ignition off.
- Reconnect connectors, reinstall components.
- Ignition on.
- Erase diagnostic trouble codes (DTCs).
Test drive the car. When test driving the car the oil temperature should be over +20°C and the throttle opening more than 5%.
Gear selector in position 3, speed approx. 60 km/h. Maintain throttle opening at approx. 10% and accelerate evenly (engine speed (RPM) over 1,400 rpm).
Note! If the diagnostic trouble code (DTC) is stored permanently, the transmission control module (TCM) activates the emergency "Limp Home" program. The transmission will not operate normally. See Emergency programs Emergency Programs In The Event Of A Fault for "Limp Home" symptoms.
- Stop car.
Continue - Verification, continued
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Verification, continued
After carrying out a test drive: Check to see if the diagnostic trouble code (DTC) has been stored again.
Has the diagnostic trouble code (DTC) been stored again. Is the transmission obviously malfunctioning?
Yes - VERIFICATION FAILED
No - VERIFIED
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VERIFICATION FAILED - Fault-tracing information
VERIFIED - FAULT FOUND
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Fault-tracing information
Information
Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.
Do you want to exit fault-tracing?
Yes - Exit fault-tracing
No - Attempt New Test
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Attempt New Test - Checking transmission fluid level
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