Check Gages Indicator Always On L18 8.1L Gasoline Engine
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Instrument Cluster Schematics | |||
1 | Did you perform the Instrument Panel Cluster Diagnostic System Check? | Go to Step 2 | |
2 |
Does the CHECK GAGES indicator turn OFF after the displays test? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 |
Does the CHECK GAGES indicator illuminate in the IPC? | Go to Step 4 | Go to Step 5 |
4 |
Does the CHECK GAGES indicator illuminate in the IPC? | Go to Step 6 | Go to Step 7 |
5 | Test the check gages indicator control circuit for a short to ground between C210 and the PCM. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 13 | Go to Step 9 |
6 | Test the check gages indicator control circuit for a short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 13 | Go to Step 8 |
7 | Inspect for poor connections at the harness connector of the MFAM. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 13 | Go to Step 10 |
8 | Inspect for poor connections at the harness connector of the IPC. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 13 | Go to Step 11 |
9 | Inspect for poor connections at the harness connector of the PCM. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 13 | Go to Step 12 |
10 | Replace the MFAM. Refer to Multifunction Alarm Module Replacement . Did you complete the replacement? | Go to Step 13 | -- |
11 | Replace the IPC. Refer to Instrument Cluster Replacement . Did you complete the replacement? | Go to Step 13 | -- |
12 |
Important:: Program the replacement PCM. Replace the PCM. Refer to Powertrain Control Module Replacement in Engine Controls - 8.1L. Did you complete the replacement? | Go to Step 13 | -- |
13 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Check Gages Indicator Always On LG5 7.2L Diesel Engine
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: Instrument Cluster Schematics | ||||
1 | Did you perform the Instrument Panel Cluster Diagnostic System Check? | -- | Go to Step 2 | |
2 |
Does the indicator illuminate continuously in the IPC? | -- | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems |
3 | Observe the engine oil pressure gauge in the IPC. Does the engine oil pressure gauge display less than the specified value? | 5 psi (34.5 kPa) | Go to Step 4 | |
4 |
Does the indicator turn OFF? | -- | Go to Step 13 | Go to Step 5 |
5 | Test the engine oil pressure switch signal circuit for a short to ground between the multifunction alarm module (MFAM) and the engine oil pressure switch. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 17 | Go to Step 6 |
6 | Observe the engine coolant temperature (ECT) gauge in the IPC. Does the ECT gauge display more than the specified value? | 118°C (245°F) | Go to Symptoms - Engine Cooling in Engine Cooling | Go to Step 7 |
7 |
Does the indicator turn OFF? | -- | Go to Step 14 | Go to Step 8 |
8 | Test the ECT switch signal circuit for a short to ground between the MFAM and the ECT switch. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 17 | Go to Step 9 |
9 |
Does the indicator turn OFF? | -- | Go to Step 12 | Go to Step 10 |
10 | Test the check gauges indicator control circuit for a short to ground between the MFAM and the IPC. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 17 | Go to Step 11 |
11 | Inspect for poor connections at the harness connector of the IPC. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 17 | Go to Step 15 |
12 | Inspect for poor connections at the harness connector of the MFAM. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 17 | Go to Step 16 |
13 | Replace the engine oil pressure switch. Refer to Engine Oil Pressure Sensor or Switch Replacement . Did you complete the replacement? | -- | Go to Step 17 | -- |
14 | Replace the ECT switch. Refer to Engine Coolant Temperature Sensor Replacement in Engine Cooling. Did you complete the replacement? | -- | Go to Step 17 | -- |
15 | Replace the IPC. Refer to Instrument Cluster Replacement . Did you complete the replacement? | -- | Go to Step 17 | -- |
16 | Replace the MFAM. Refer to Multifunction Alarm Module Replacement . Did you complete the replacement? | -- | Go to Step 17 | -- |
17 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |
