Series 40E Troubleshooting – Section 20.1 Change Oil Lamp

Follow these procedures to diagnose and correct faults with the Change Oil Lamp.‪

Section 20.1.1
System Functions

The amber Change Oil Lamp will be illuminated when a customer programmable service interval has been exceeded. These limits may be set up in terms of vehicle miles, hours or calculated fuel consumption. These service interval limits may be adjusted or the Change Oil Lamp feature may be turned on or off using the EST. See Figure
“Change Oil Lamp Function Diagram”

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Figure 1. Change Oil Lamp Function Diagram

Section 20.1.2
Fault Detection/Management

The ECM can detect an open COL lamp circuit during a Standard Engine Off test which automatically performs an output circuit check. For service interval light wiring, see Figure
“Service Interval Light Wiring”

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Figure 2. Service Interval Light Wiring

Key ON, Engine OFF voltage checks are listed in Table
“Voltage Checks, Key ON, Engine OFF”

. Check with the ECM chassis connector (black) unplugged, the breakout box installed, the ignition key ON and the engine OFF.‪

Test Points‪	Spec.‪	Comments‪
439L to Grd‪	12 v‪	Fuse for instrument cluster and COL lamp.‪
45 to Grd‪	12 v‪	Battery voltage should be present from lamp circuit to ECM. If no voltage is present, check the circuit for open or short. Check the fuse.‪

Harness resistance checks arelisted in Table
“Harness Resistance Checks”

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Test Points‪	Spec.‪	Comments‪
45 to COL‪	< 5 Ω‪	Continuity from ECM to cluster connector for COL lamp. (Pin No. 11 in cluster connector.)‪
COL to 439L‪	< 5 Ω‪	Continuity from instrument cluster connector to fuse. (Pin No. 5 in cluster connector.)‪

Section 20.1.2.1
Functional Checks

Physical Circuit Check
— The physical check, with breakout box installed, momentarily ground the ECM chassis pin No. 45 . The COL lamp should illuminate if the COL circuit is good.‪

Output State Check
— Request an Output State Check with the EST and the COL lamp can be commanded on for test purposes.. If the COL circuit checks out good to this point, and does not turn on when an Output State Check is commanded, either the ECM is bad or the feature is not turned on.‪

Fault Code Description — Fault Code 262, COL Output Circuit Check fault detected during a key ON, engine OFF Standard Test; possible open or short in COL circuit.‪

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Section 20.1.3
Change Oil Lamp Description

The Change Oil Lamp (COL) is cycled momentarily ON, at every key on cycle as part of a visual bulb check. It is mounted in the instrument cluster and receives 12 volt power from the cluster. The lamp is illuminated when the ECM completes the path to ground.‪

Section 20.1.4
Service Interval Limits

The limits listed below are the maximum and default values for the service internal function. Through the use of the EST, these limits can be adjusted downward for specific customer needs, but not above the recommended factory service interval.‪

Section 20.1.4.1
Service Interval Parameters

This group of parameters customizes the Service Interval feature. Service Interval allows the vehicle owner to customize when his vehicle requires servicing as in changing oil. When the programmed distance or engine hour has been reached, the Change Oil Lamp will illuminate to indicate it is time for maintenance and service.‪

• Service Interval Mode — This parameter indicates to the on-board electronics if this vehicle has the service interval feature.
• Fuel Interval — This parameter allows the customer to program the amount of fuel used since the last service before lighting the Change Oil Lamp.
• Hour Interval — This parameter allows the customer to program the amount of Engine Hours since the last service before lighting the Change Oil Lamp.
• Distance Interval — This parameter allows the customer to program the amount of Distance miles/kilometers since the last service before lighting the Change Oil Lamp.
• Fuel Used Starting Value — This parameter indicates when the last service was performed.
• Engine Hour Staring Value — This parameter indicates when the last service was performed.
• Vehicle Distance Starting Value — This parameter indicates when the last service was performed.
• Service Soon Percent — This parameter indicates at what percentage of the service intervals should the Change Oil Lamp begin to flash as a warning.
• Change Oil Lamp On Mode — This parameter indicates if the Change Oil Lamp is to be always on after an engine start. This parameter also indicates how long to activate the Change Oil Lamp after an engine start, if it is not always on.
• Service Interval Reset Request — This parameter indicates to the on-board electronics if the vehicle has been serviced and the starting values are to be reset.

Section 20.1.5
Flash Code 262

ATA code SID 54 FMI 11‪

Change Oil Lamp OCC self test fail‪

Flash code 262 is caused by an open or short to ground or power in the Change Oil Lamp circuit. It is detected during a Standard Engine Off test when an Output Circuit Check is automatically performed. The Engine standard test may be requested with the EST or displayed as a flash code if the diagnostic button is pressed in and the ignition key is turned to the ON position. ‪