Part 1
Incorrect gear ratio
Checking transmission oil level
- Ignition on.
- Go into scrolling value.
- Read off oil temperature.
Check transmission oil level according to Oil inspection Oil Inspection. Check level at different temperatures.
Is the level OK?
Yes - Checking for mechanical faults in the transmission
No - Checking for oil leakage
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Checking for oil leakage
Check for oil leaks. Remedy as necessary. Top up oil to correct level.
Note! Driving the car with a low oil level may have damaged the transmission. Test drive car to ensure that the transmission is OK.
Select "Continue" when the fault has been repaired.
Continue - Test driving
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Checking for mechanical faults in the transmission
- Ignition on.
- Make a note of diagnostic trouble code (DTC) frozen values.
- Erase diagnostic trouble code (DTC).
Test drive car. Repeat the driving conditions when the diagnostic trouble code (DTC) was stored. Watch the automatic transmission warning light. If the warning lamp starts flashing a diagnostic trouble code (DTC) has been stored. Make an immediate note of abnormalities in the operation of the transmission before and after the warning lamp started flashing.
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.
One of the following alternatives can be obtained:
- 1: The transmission does not exhibit mechanical faults.
- 2: The transmission exhibits a continuous mechanical fault but diagnostic trouble codes (DTCs) do not recur.
- 3: The transmission exhibits a continuous mechanical fault and diagnostic trouble codes (DTCs) recur.
Which alternative does the status display?
1 - Connecting the breakout box
Connecting the breakout box
2 - Fault-tracing information
3 - Replacing component
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Fault-tracing information
See table of symptoms for symptoms and corrective action.
Continue - FAULT-TRACING FAILED
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Replacing component
- Ignition off.
Try a new transmission:
- For gasoline engines see Gearbox/torque converter, replacing Gearbox/Torque Converter, Replacing.
- For diesel engines see.
Select "Continue" when the fault has been repaired.
Continue - Verification
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Connecting the breakout box
Connecting the breakout box
981 3190 Replaced by 9511428 981 3190 Replaced by 951 1428 981 3195 ADAPTOR 981 3195 Adaptor
Connecting the breakout box (Automatic transmission)
Is the breakout box connected to the control module?
Yes - CONNECTED
No - Connecting the breakout box
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Connecting the breakout box
Connecting the breakout box
981 3190 Replaced by 9511428 981 3190 Replaced by 951 1428 981 3195 ADAPTOR 981 3195 Adaptor
Connecting the breakout box
Caution! The control module power supply must be disconnected when connecting or disconnecting the breakout box, otherwise it may be damaged.
- Ignition off
- Disconnect the transmission control module (TCM).
- Connect adapter 981 3195 ADAPTOR 981 3195 Adaptor to transmission control module (TCM) connector and connect breakout box 981 3190 Replaced by 9511428 981 3190 Replaced by 951 1428 to adapter.
Note! Ensure that the adaptor is the right way round - with the breakout box cable harness outwards towards the fender.
Select "Continue"
Continue - DONE
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DONE - Checking ground terminals
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Checking ground terminals
- Ignition off.
- Control module disconnected.
- Turn of all equipment in the car that takes power from the battery (the interior lighting and radio etc).
Connect an ohmmeter between the battery negative terminal and:
#20 (#A20) on the breakout box
#29 (#A29) on the breakout box.
The ohmmeter should read approximately 0 ohms for all readings
OK - No Fault Found
Not OK - Checking for an open-circuit, contact resistance and oxidation
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Checking for an open-circuit, contact resistance and oxidation
Check ground terminals 31/32 and 31/33 and cables between ground terminals and control module #A20 and #A29 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault , and contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Check ground lead between battery and bodywork for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault , and contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Select "Continue" when the fault has been repaired.
Continue - Verification
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Verification
Verification
Hint: After carrying out the repair check that the fault has been remedied.
Carry out the following:
- Ignition off
- Turn of all equipment in the car that takes power from the battery (the interior lighting and radio etc).
- Control module disconnected.
Connect an ohmmeter between the battery negative terminal and:
#20 (#A20) on the breakout box
#29 (#A29) on the breakout box.
The ohmmeter should read approximately 0 ohms for all readings
OK - VERIFIED
Not OK - VERIFICATION FAILED
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VERIFIED - FAULT FOUND
VERIFICATION FAILED - Fault-tracing information
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Fault-tracing information
Information
Fault-tracing information
The fault should be diagnosed and remedied. Since this is not the case the fault-tracing process has failed.
Complete the fault-tracing for those fault or try again.
Do you want to terminate fault-tracing at this time?
Yes - Exit fault-tracing
No - Attempt New Test
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Attempt New Test - Checking ground terminals
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CONNECTED - Checking transmission speed sensor signal cable (-)
FAULT FOUND - Checking transmission speed sensor signal cable (-)
No Fault Found - Checking transmission speed sensor signal cable (-)
FAULT-TRACING FAILED - Checking transmission speed sensor signal cable (-)
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Checking transmission speed sensor signal cable (-)
- Ignition off.
- Control module disconnected.
Connect an ohmmeter between #2 (#A2) and #20 (#A20) on the breakout box.
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 the transmission connector.
Connect an ohmmeter between transmission connector terminal 17 (transmission speed sensor 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 transmission connector terminal 17 and transmission control module (TCM) #A2 for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Select "Continue" when the fault has been repaired.
Continue - Verification
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Replacing component
- Ignition off.
Try a new transmission speed sensor according to Replacing transmission speed sensor Replacing Transmission Speed Sensor.
Select "Continue" when the fault has been repaired.
Continue - Verification
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Checking signal from transmission speed sensor
- Ignition off.
- Connect control module.
- Connect a multimeter (frequency meter) between #1 (#A1) and #2 (#A2) on the breakout box.
- Raise car so that front wheels can rotate freely.
- Engine idling.
- Air conditioning (A/C) system turned off.
- Move the gear selector to position D so the front wheels begin to rotate.
- Increase the engine speed (RPM) to approx. 2,000 rpm.
- Keep engine speed (RPM) 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 engine speed is steady and the transmission is not shifting.
Note! Ensure that the front wheels are not rotating when the gear selector is moved.
Is the frequency stable?
Yes - Checking transmission speed sensor signal cable (-)
No - Checking transmission speed sensor resistance
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Checking transmission speed sensor resistance
- Ignition off.
- Disconnect control module.
Connect an ohmmeter between #1 (#A1) and #2 (#A2) on the breakout box.
The ohmmeter should read approx. 300-600 ohms.
OK - Checking for sources of interference
Not OK - Checking the transmission connector
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Checking for sources of interference
Check that the transmission speed sensor wiring is not too near sources of interference, such as electric motors, ignition cables, mobile telephone cables etc.
Select "Continue" when the fault has been repaired.
Continue - Test driving
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Checking the transmission connector
- Ignition off.
- Control module disconnected.
- Disconnect the transmission connector.
- Check transmission control module (TCM) connector for contact resistance and oxidation and remedy according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
- Connect transmission connector.
Connect an ohmmeter between #1 (#A1) and #2 (#A2) on the breakout box.
The ohmmeter should read approx. 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) has been loose connections in the transmission connector.
Continue - Verification
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