Procedure 1 - Speedometer Inoperative
Speedometer does not WorkSpeedometer Circuit <M/T>:
Speedometer Circuit <A/T>:
Connectors:
CIRCUIT OPERATION
- The ignition switch (IG1) circuit is the power source for the speedometer and vehicle speed sensor.
- The vehicle speed sensor is installed on the transaxle. Four pulses are generated with one turn of the vehicle speed sensor shaft. These pulse signals are sent into the speedometer. The speedometer calculates the pulse signals, and operates the indicator. At the same time, the travel distance is calculated.
TECHNICAL DESCRIPTION (COMMENT)
The cause may be a faulty vehicle speed sensor circuit system or a faulty speedometer. Vehicle speed sensor is also used by the engine control module (ECM)
TROUBLESHOOTING HINTS
- Malfunction of the vehicle speed sensor
- Malfunction of the combination meter (printed-circuit board or speedometer and tachometer)
- Malfunction of the ECM
- Damaged harness wires or connectors
DIAGNOSIS
Required Special Tools:
- MB991223: Harness Set
- MB991502: Scan Tool (MUT-II)
CAUTION: To prevent damage to scan tool always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool.
STEP 1. Check the speedometer.
1. Connect scan tool MB991502 to the data link connector.
2. Use scan tool MB991502 to enter a simulated vehicle speed.
Q: Does the speedometer correspond with the simulated vehicle speed?
YES: Go to Step 9
NO: Go to Step 2.
STEP 2. Check the vehicle speed sensor
1. Connect scan tool MB991502 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. Read the MFI system diagnostic trouble code.
Q: Is MFI system DTC P0500
YES: Refer to
NO: Go to Step 3.
STEP 3. Check the combination meter power supply circuit at the combination meter connector C-01.
1. Disconnect combination meter connector C-01.
2. Turn the ignition switch to "ON" position.
3. Measure the voltage between terminal 9 and ground.
Q: Is the voltage 12 volts (battery positive voltage) between terminal 9 and ground?
YES: Go to Step 6.
NO: Go to Step 4.
STEP 4. Check combination meter connector C-01 for damage.
Q: Is combination meter connector C-01 in good condition?
YES: Go to Step 5.
NO: Repair or replace it. Refer to Harness Connector Inspection. The speedometer should work normally.
STEP 5. Check the harness wires between combination meter connector C-01 and ignition switch (IG1).
NOTE: After checking junction block connectors C-211 and C-214, joint connector C-21 check the wires. If junction block connectors C-211 and C-214, joint connector C-21 are damaged, repair or replace them. Refer to Harness Connector Inspection.
Q: Is the harness wires between combination meter connector C-01 and ignition switch (IG1) in good condition?
YES: There is no action to be taken.
NO: Repair them. The speedometer should work normally.
STEP 6. Check the combination meter (speedometer) ground circuit at combination meter connector C-01.
1. Disconnect combination meter connector C-01.
2. Measure the resistance between terminal 1, 2 and ground.
Q: Is the resistance value less than 2 Ohm?
YES: Go to Step 9
NO: Go to Step 7.
STEP 7. Check the combination meter connector C-01 for damage.
Q: Is combination meter connector C-01 in good condition?
YES: Go to Step 8.
NO: Repair or replace it. Refer to Harness Connector Inspection. The speedometer should work normally.
STEP 8. Check the harness wire between combination meter connector C-01 and ground.
Q: Is the harness wire between combination meter connector C-01 and ground in good condition?
YES: Go to step 9.
NO: Repair it. The speedometer should work normally.
STEP 9. Check the combination meter vehicle speed sensor input signal circuit at combination connector C-01.
1. Disconnect combination connector C-01 and measure at the harness side.
2. Turn the ignition switch to the "ON" position.
3. Measure the voltage between terminal 12 and ground.
Q: Is the voltage approximately 5 volts?
YES: Repair or replace the combination meter (printed- circuit board or speedometer and tachometer). The speedometer should work normally.
NO: Go to Step 10.
STEP 10. Check combination connector C-01 for damage.
Q: Is combination connector C-01 in good condition?
YES: Go to Step 11.
NO: Repair or replace it. Refer to Harness Connector Inspection. The speedometer should work normally.
STEP 11. Check the harness wires between combination connector C-01 and vehicle speed sensor connector B-04.
NOTE: After checking intermediate connector C-124, check the wires. If intermediate connector C-124 is damaged, repair or replace the connector. Refer to Harness Connector Inspection.
Q: Are the harness wires between combination connector C-01 and vehicle speed sensor connector B-04 in good condition?
YES: Go to Step 12.
NO: Repair them. The speedometer should work normally.
STEP 12. Check the vehicle speed sensor power supply circuit at the vehicle speed sensor connector B-04.
1. Disconnect vehicle speed sensor connector B-04.
2. Turn the ignition switch to the "ON" position.
3. Measure the voltage between terminal 1 and ground.
Q: Is the voltage approximately 12 volts (battery positive voltage)?
YES: Go to Step 16.
NO: Go to Step 14.
STEP 13. Check vehicle speed sensor connector B-04 for damage.
Q: Is vehicle speed sensor connector B-04 in good condition?
YES: Go to Step 15.
NO: Repair or replace it. Refer to Harness Connector Inspection. The speedometer should work normally.
STEP 14. Check the harness wires between vehicle speed sensor connector B-04 and ignition switch (IG1).
NOTE: After checking junction block connectors C-211 and C-214 and intermediate connector C-124, check the wires. If junction block connectors C-211 and C-214 and intermediate connector C-124 are damaged, repair or replace them. Refer to Harness Connector Inspection.
Q: Are the harness wires between vehicle speed sensor connector B-04 and ignition switch (IG1) in good condition?
YES: There is no action to be taken.
NO: Repair them. The speedometer should work normally.
STEP 15. Check the vehicle speed sensor ground circuit at vehicle speed sensor connector B-04.
1. Disconnect vehicle speed sensor connector B-04.
2. Measure the resistance between terminal 2 and ground.
Q: Is the resistance less than 2 Ohm?
YES: Repair the vehicle speed sensor.
NO: Go to Step 16.
STEP 16. Check vehicle speed sensor connector B-04 for damage.
Q: Is vehicle speed connector B-04 in good condition?
YES: Go to Step 18.
NO: Repair or replace it. Refer to Harness Connector Inspection. The speedometer should work normally.
STEP 17. Check the harness wire between vehicle speed sensor connector B-04 and ground.
Q: Is the harness wire between vehicle speed sensor connector B-04 and ground in good condition?
YES: Go to Step 21.
NO: Repair it. The speedometer should work normally.
STEP 18. Check the combination meter powertrain control module input signal circuit at combination meter connector C-01.
1. Disconnect combination meter connector C-01 and measure at the harness side.
2. Turn the ignition switch to "ON" position.
3. Measure the voltage between terminal 12 and ground.
Q: Is the voltage approximately 5 volts?
YES: Repair or repair the combination meter (printed-circuit board or speedometer and tachometer). The speedometer should work normally.
NO: Go to Step 21.
STEP 19. Check combination meter connector C-01 for damage.
Q: Is combination meter connector C-01 in good condition?
YES: Go to Step 20.
NO: Repair or replace it. Refer to Harness Connector Inspection. The speedometer should work normally.
STEP 20. Check the harness wires between joint connector C-01 and PCM connector C-116.
NOTE: After checking joint connector C-21 and intermediate connector C-124, check the wires. If joint connector C-21 and intermediate connector C-124, are damaged, repair or replace them. Refer to Harness Connector Inspection.
Q: Are the harness wires between combination meter connector C-01 and PCM connector C-116 in good condition?
YES: Go to Step 21.
NO: Repair them. The speedometer should work normally.
STEP 21. Recheck for malfunction.
Q: Is a malfunction eliminated?
YES: This diagnosis is complete. (If no malfunctions are not found in all steps, an intermittent malfunction is suspected. Refer to GROUP INTRODUCTION, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction)
NO: Replace the speedometer.