| 1 |
VERIFY FREEZE FRAME DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAVE BEEN RECORDED
- Have FREEZE FRAME DATA and DIAGNOSTIC MONITORING TEST RESULTS (engine cooling system related) been recorded?
|
Yes |
Go to the next step. |
| No |
Record FREEZE FRAME DATA and DIAGNOSTIC MONITORING TEST RESULTS on repair order, then go to the next step. |
| 2 |
VERIFY RELATED REPAIR INFORMATION AVAILABILITY
- Verify related Service Bulletins and/or on-line repair information availability.
- Is any related repair information available?
|
Yes |
Perform repair or diagnosis according to the available repair information.
- If the vehicle is not repaired, go to the next step.
|
| No |
Go to the next step. |
| 3 |
VERIFY RELATED PENDING OR STORED DTC
- Switch the ignition to off, then to the ON (engine off)
- Verify the pending code or stored DTCs using the M-MDS.
- Are other DTCs present?
|
Yes |
Go to the applicable DTC inspection.
(See
DTC TABLE [L5]
.) |
| No |
Go to the next step. |
| 4 |
INSPECT THERMOSTAT
|
Yes |
Replace the thermostat, then go to Step 6.
(See
THERMOSTAT REMOVAL/INSTALLATION [L5]
.) |
| No |
Go to the next step |
| 5 |
INSPECT ECT SENSOR
|
Yes |
Replace the ECT sensor, then go to the next step.
(See
ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION [L5]
.) |
| No |
Go to the next step. |
| 6 |
VERIFY MONITORING CONDITION FOR REPAIR VERIFICATION
- Make sure to reconnect all disconnected connectors.
- Cool down the engine.
NOTE:
- If workshop inside and outside temperature difference is significant, PCM might not operate thermostat monitor. Therefore, it is recommended to cool down engine out of workshop.
- Switch the ignition to ON (engine off).
- Clear the DTC from the PCM memory using the M-MDS.
- Access the ECT and IAT PIDs using the M-MDS under the following conditions:
P0126:00
P0128:00
- IAT: above-10°C {14°F}
- ECT: below 36°C {97°F}
- Difference between ECT and IAT: below 6°C {10.8°F}
- Is there any PID that out of the specification?
|
Yes |
Take corrective action (e.g. cool down engine).
Repeat this step. |
| No |
P0126:00
P0128:00
|
| 7 |
VERIFY TROUBLESHOOTING OF DTC P0126:00 COMPLETED
- Start engine and turn off the electrical load and A/C.
- Access and monitor the PIDs TH_M (Temp unit) and TH_M_MIN (Temp unit) using the M-MDS.
NOTE:
- This test requires actual driving. Chassis roller cannot be used for this test
- During the test drive, constant speed should be maintained, although 2 or 3 stops during every 5 min
of driving time (e.g. for traffic signals) is acceptable. Stop-and-go (e.g. in case of traffic congestion) is not acceptable during the test period.
- Test period depends on ECT at engine start, (e.g. if ECT is -10°C {14°F}
, monitoring period is 38 min
and ECT is 30°C {86°F}
, monitoring period is 8 min)
- Verify the PIDs TH_M and TH_M_MIN valves.
- Is the TI_LM valve above TH_M_MIN valve?
|
Yes |
Go to Step 9. |
| No |
Replace the PCM, then go to the next step.
(See
PCM REMOVAL/INSTALLATION [L5]
.) |
| 8 |
VERIFY TROUBLESHOOTING OF DTC P0128:00 COMPLETED
- Start engine and turn off the electrical load and A/C
- Access and monitor the PIDs TH_M (Temp and Num units), TH_M_MAX (Num unit) and TH_M_MIN (Temp unit) using the M-MDS.
NOTE:
- This test requires actual driving. Chassis roller cannot be used for this test.
- During the test drive, constant speed should be maintained, although 2 or 3 stops (e.g. for traffic signals) is acceptable. Stop-and-go (e g. in case of traffic congestion) is not acceptable during the test period.
- Verify the PIDs TH_M, TH_M_MAX and TH_M_MIN values.
- Are TH_M valve of Num unit below TH_M_MAX valve and TH_M valve of Temp unit above TH_H_MIN valve?
|
Yes |
Go to the next step. |
| No |
Replace the PCM, then go to the next step.
(See
PCM REMOVAL/INSTALLATION [L5]
.) |
| 9 |
VERIFY AFTER REPAIR PROCEDURE
|
Yes |
Go to the applicable DTC inspection.
(See
DTC TABLE [L5]
.) |
| No |
DTC troubleshooting completed. |