Malfunction Indicator Lamp: Testing and Inspection

DESCRIPTION

- Malfunction Indicator Lamp never on.

TEST 1

Is number 7 fuse burnt?

YES -- Repair wiring harness and replace fuse.

NO -- Go to Test 2.

TEST 2

Is there correct voltage at the number 7 fuse?

Specification: More than 10.5V

YES -- Go to Test 3.

NO -- Repair open in wiring harness between fuse block and ignition switch.

TEST 3

Remove the Malfunction Indicator Lamp bulb. Is the voltage correct on the positive side of the Malfunction Indicator Lamp bulb socket?

Specification: More than 10.5V

YES -- Go to Test 4.

NO -- Repair open in wiring harness between fuse block and Malfunction Indicator Lamp bulb socket.

TEST 4

Apply 12 Volts and a ground to the Malfunction Indicator Lamp bulb.

Does the Malfunction Indicator Lamp bulb illuminate?

YES -- Go to Test 5.

NO -- Replace Malfunction Indicator Lamp bulb.

TEST 5

Special Service Tool (SST)-Break Out Box (Used For Voltage Pin Tests):

Disconnect the Powertrain Control Module (PCM). Install Special Service Tool (SST) (Break Out Box) to the PCM connector.

View: Malfunction Indicator Lamp Relational Schematic:

Does continuity exist between Malfunction Indicator Lamp socket and test pin 17?

YES -- Replace PCM.

NO -- Repair open circuit in wiring harness between PCM and Malfunction Indicator Lamp socket.