| 1 |
Was "Engine and Emission Control System Check" performed? |
Go To Step 2. |
Go to "ENGINE AND EMISSION CONTROL SYSTEM CHECK :". |
| 2 |
Does speedometer indicate vehicle speed? |
Go To Step 3. |
Go To Step 5. |
| 3 |
- Check vehicle speed signal.
Is vehicle speed displayed on scan tool in Step 2) and 4) of "DTC Confirmation Procedure"? |
Intermittent trouble or faulty ECM.
Check for intermittent referring to "INTERMITTENT AND POOR CONNECTION INSPECTION
." |
Go To Step 4. |
| 4 |
Check VSS signal circuit
- Turn ignition switch to OFF position, disconnect connector from VSS.
- Disconnect connectors from combination meter referring to COMBINATION METER REMOVAL AND INSTALLATION
.
- Turn ON ignition switch, without running engine.
- Measure voltage from "PPL" wire terminal of VSS connector to engine ground.
Is voltage within 4 - 5 V? |
Faulty combination meter. |
"PPL" wire open or short.
Poor connection of ECM connector terminal.
If OK, substitute a known-good ECM and recheck. |
| 5 |
Check power supply circuit
- Turn ignition switch to OFF position, disconnect connector from VSS.
- Check for proper connection to "BLK/RED", "BLK/ORN" and "PPL" wire terminal of VSS connector.
- If wires are OK, turn ON ignition switch, measure voltage between engine ground and "BLK/RED" wire terminal.
Is it voltage 10 - 14 V? |
Go To Step 6. |
Open wire in "BLK/RED" circuit. |
| 6 |
Check ground circuit
- Measure resistance between engine body ground and "BLK/ORN" wire terminal of VSS connector with ignition switch turn OFF.
Is resistance below 5 Ω? |
Go To Step 7. |
Open or high resistance wire in "BLK/ORN" circuit. |
| 7 |
Check wire circuit
- Turn ON ignition switch, measure voltage between engine ground and "PPL" wire terminal of VSS connector.
Is it voltage 10 - 14 V? |
Go To Step 9. |
Go To Step 8. |
| 8 |
Check wire circuit
- Disconnect connectors from combination meter referring to COMBINATION METER REMOVAL AND INSTALLATION
with ignition switch turn OFF.
- Turn ON ignition switch, measure voltage between engine ground and "PPL" wire terminal of combination meter.
Is it voltage 4 - 5 V? |
Faulty combination meter. |
Go To Step 9. |
| 9 |
Check wire circuit
- Turn ON ignition switch, measure voltage between engine ground and "PPL" wire terminal of VSS connector.
Is it voltage 4 - 5 V? |
Go To Step 13. |
Go To Step 10. |
| 10 |
Check ECM voltage
- Turn ON ignition switch, measure voltage between vehicle body ground and "G04-35" terminal of ECM connector.
Is it voltage 4 - 5 V? |
Open wire in "PPL" circuit. |
Go To Step 11. |
| 11 |
Check short circuit
- Disconnect connectors from ECM with ignition switch turned OFF.
- Turn ON ignition switch, measure voltage between engine ground and "G04-35" terminal of ECM connector.
Is it voltage 0 V? |
Go To Step 12. |
"PPL" wire shorted to power supply circuit. |
| 12 |
Check short circuit
- Measure resistance between engine ground and "G04-35" terminal of ECM connector with ignition switch turned OFF.
Is resistance infinity? |
Go To Step 13. |
"PPL" wire shorted to ground circuit.
If wire are OK, substitute a known-good ECM and recheck. |
| 13 |
Check signal rotor
- Remove VSS referring to VEHICLE SPEED SENSOR (VSS) REMOVAL AND INSTALLATION
.
- Visually inspect VSS sensor signal rotor for damage.
Was any damage found? |
Faulty VSS signal rotor. |
Go To Step 14. |
| 14 |
Check VSS
- Remove metal particles on end face of VSS, if any.
- Connect connectors to ECM and VSS.
- Turn ON ignition switch.
- Check for voltage at "G04-35" terminal of ECM connector by passing magnetic substance (iron) (1) while keeping approximately 1 mm (0.03 in.) gap with respect to end face of VSS.
Do voltage vary from low (0-1 V) to high (4 - 6) or from high to low? |
Substitute a known-good ECM and recheck. |
Faulty VSS. |