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Home >> Volvo >> 1998 >> S70 T5 L5-2.3L Turbo VIN 53 B5234T3 >> Repair and Diagnosis >> Transmission and Drivetrain >> Transmission Control Systems >> Testing and Inspection >> Component Tests and General Diagnostics >> Checking Communication

Checking Communication






1. Checking power supply
- Preparation:
Ignition ON
Volvo, or equivalent, Scan Tool (ST) connected To Data Link Connector (DLC).
Power up the scan tool
- Check that the display lights.
- Does the scan tool display light?
YES: Proceed to step 20
NO: Proceed to step 2





2. Checking data link connector power supply
- Preparation:
Ignition OFF
Disconnect the scan tool
Disconnect the DLC
Connect a voltmeter between DLC terminal 16 and ground.
- The voltmeter should read battery voltage.
- If reading is OK:
Proceed to step 8
- If reading is incorrect:
Proceed to step 3





3. Checking fuse 15
- Check that fuse 15 is intact.
- Is the fuse intact?
YES: Proceed to step 5
NO: Proceed to step 4





4. Checking for short-circuit to ground
- Check cable between DLC terminal 16 and fuse 15 for a short-circuit to ground according to step 3 of checking for permanent faults. Checking For Permanent Faults
- Then continue with step 33





5. Checking voltage before the fuse
- Preparation:
Ignition OFF
Connect a voltmeter between the rear socket (towards windshield) on the fuse holder for fuse 15 and ground.
- The voltmeter should read battery voltage.
- If reading is OK:
Proceed to step 6
- If reading is incorrect:
Proceed to step 7





6. Checking for an open-circuit
- Check cable between fuse 15 and DLC terminal 16 for an open-circuit according to step 2 of checking for permanent faults. Checking For Permanent Faults
- Then continue with step 33





7. Checking for an open-circuit
- Check the cable between fuse 15 and battery positive terminal for an open-circuit according to step 2 of checking for permanent faults. Checking For Permanent Faults
- Then continue with step 33





8. Checking data link connector (DLC) power ground
- Preparation:
Ignition OFF
Connect ohmmeter between DLC terminal 4 and ground.
- The ohmmeter should read approx. 0 Ohms
- If reading is OK:
Proceed to step 10
- If reading is incorrect:
Proceed to step 9





9. Checking for an open-circuit
- Check cable between DLC terminal 4 and ground terminal (31/15) by the passenger side A-pillar for an open-circuit according to step 2 of checking for permanent faults. Checking For Permanent Faults
- Then continue with step 33





10. Checking data link connector signal ground
- Preparation:
Ignition OFF
Connect ohmmeter between DLC terminal 5 and ground.
- The ohmmeter should read approx. 0 Ohms
- If reading is OK:
Proceed to step 12
- If reading is incorrect:
Proceed to step 11





11. Checking for an open-circuit
- Check cable between DLC terminal 4 and ground terminal (31/15) by the passenger side A-pillar for an open-circuit according to step 2 of checking for permanent faults. Checking For Permanent Faults
- Then continue with step 33





12. Checking voltage to adapter box
- Preparation:
Ignition ON
Scan tool connected to DLC
Separate scan tool wiring at the adapter box.
Connect a voltmeter between ground and the 25-pin connector terminal:
15 (measured to DLC)
20 (measured to DLC)
21 (measured to DLC)
22 (measured to DLC)
- The voltmeter should read battery voltage for all readings.
- If reading is OK:
Proceed to step 14
- If reading is incorrect:
Proceed to step 13
13. Replacing wiring
- Try with new scan tool wiring.
- Then continue with step 33





14. Checking power ground to adapter box
- Preparation:
Ignition OFF
Connect scan tool wiring to DLC
Disconnect scan tool wiring from adapter box
Connect an ohmmeter between ground and the 25 pin connector terminal:
23 (measured to DLC)
24 (measured to DLC)
25 (measured to DLC)
- The ohmmeter should read 0 Ohms for all readings.
- If reading is OK:
Proceed to step 15
- If reading is incorrect:
Proceed to step 13





15. Checking signal ground to adapter box
- Preparation:
Ignition OFF
Connect scan tool wiring to DLC
Disconnect scan tool wiring from adapter box.
Connect an ohmmeter between the 25-pin connector terminal 14 (DLC side) and ground.
- The ohmmeter should read 0 Ohms
- If reading is OK:
Proceed to step 16
- If reading is incorrect:
Proceed to step 13





16. Checking supply voltage to scan tool
- Preparation:
Ignition ON
Connect scan tool wiring to DLC
Connect scan tool to adapter box.
Disconnect the 3-pin connector from the Scan Tool (ST).
Check that the switch on the adapter box is on.
Connect a voltmeter between ground and the 3-pin connector terminal:
1 (measured to DLC)
3 (measured to DLC)
- The voltmeter should read:
Terminal 1 and ground: 7-9 volts
Terminal 3 and ground: Battery voltage
- If reading is OK:
Proceed to step18
- If reading is incorrect:
Proceed to step17
17. Replacing component
- Repeat test with new adapter box.
- Then continue with step 33





18. Checking ground lead to scan tool
- Preparation:
Ignition OFF
Connect scan tool wiring to DLC
Disconnect the 3-pin connector from the scan tool
Connect an ohmmeter between the 3-pin connector terminal 2 (DLC side) and ground.
- The ohmmeter should read 0 Ohms
- If reading is OK:
Proceed to step 19
- If reading is incorrect:
Proceed to step 17
19. Replacing component
- Try a new scan tool
- Then continue with step 33





20. Checking ground terminals
- Preparation:
Ignition off
- Connect the test box and check ground terminals. Connecting the Test Box
- The ohmmeter should read approx. 0 Ohms for all readings.
- If reading is OK:
Proceed to step 22
- If reading is incorrect:
Proceed to step 21
21. Fault-tracing information
- The cause of the fault has been a poor ground terminal.
- Then continue with step 33





22. Checking supply voltage (15 supply)
- Preparation:
Ignition ON
Transmission control module (TCM) connected
- Connect a voltmeter between #30 (#A30) and #29 (#A29) on the test box.
- The voltmeter should read approx. battery voltage
- If reading is OK:
Proceed to step 26.
- If reading is incorrect:
Proceed to step 23.





23. Checking fuse 11/1
- Check if fuse 11/1 is intact.
- Is the fuse intact?
YES: Proceed to step 24
NO: Proceed to step 25





24. Checking for an open-circuit
- Check cable between Transmission Control Module (TCM) #30 and ignition switch terminal 15 for an open-circuit according to step 2 of checking for permanent faults. Checking For Permanent Faults
- Then continue with step 33





25. Checking for short-circuit to ground
- Check cable between TCM #A30 and fuse 11/1 for a short-circuit to ground according to step 3 of checking for permanent faults. Checking For Permanent Faults
- Replace fuse 1/1 1.
- Then continue with step 33





26. Checking communication cable to the DLC
- Preparation:
Ignition OFF
Disconnect the scan tool from the DLC
Connect an ohmmeter between DLC terminal 7 and test box terminal #52(#B22)
- The ohmmeter should read 0 Ohms
- If reading is OK:
Proceed to step 28.
- If reading is incorrect:
Proceed to step 27





27. Checking for an open-circuit
- Check the cable between DLC terminal 7 and TCM #B22 for an open-circuit according to step 2 of checking for permanent faults. Checking For Permanent Faults
- Then continue with step 33





28. Checking the communication cable
- Preparation:
Ignition OFF
Connect the TCM
Ignition ON
Connect a voltmeter between DLC terminal 7 and ground.
- The voltmeter should read approx. 9-11 volts
- If reading is OK:
Proceed to step 31.
- If value is lower:
Proceed to step 29
- If value is higher:
Proceed to step 30





29. Checking for short-circuit to ground
- Check cable between DLC terminal 7 and control modules connected to this cable for short-circuit to ground according to step 3 of checking for permanent faults. Checking For Permanent Faults
- Then continue with step 33





30. Checking for short-circuit to supply voltage
- Check the cable between DLC terminal 7 and the control modules connected to this cable for a short-circuit to ground according to step 4 of checking for permanent faults. Checking For Permanent Faults
- Then continue with step 33





31. Checking communication cable to adapter box
- Preparation:
Ignition ON
Connect scan tool wiring to DLC
Separate scan tool wiring at the adapter box.
Connect an ohmmeter between the 25-pin connector terminal 5 (DLC side) and ground.
- The voltmeter should read approx. 9-11 volts
- If reading is OK:
Proceed to step 32
- If reading is incorrect:
Proceed to step 13





32. Checking communication with the scan tool
- Preparation:
Connect scan tool wiring to DLC
Connect scan tool wiring to adapter box
Disconnect the 62-pin connector from the scan tool
Ignition ON
Check that the switch on the adapter box is on.
Connect a voltmeter between the 62-pin connector terminal 47 (scan tool side) and ground.
Try to establish communication with the TCM AW50-42.
- Voltage should be approx. 8.6 volts
- It should then start to fluctuate rapidly between 8.6 and 0 volts when the scan tool tries to establish communication.
- If reading is OK:
Proceed to step 17
- If reading is incorrect:
Proceed to step 19





33. Verification
- Preparation:
Ignition OFF
Reconnect connectors, reinstall components etc.
Scan tool connected to DLC
- Try to establish communication with the TCM
- Has communication been established with the TCM
YES: Fault corrected
NO: Proceed to step 34
34. Fault-tracing information
- The verification result shows that the fault persists.
- Do you want to exit fault-tracing?
YES: Fault not corrected
NO: Proceed to step 1

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