3.2TL TYPE S V6-3.2L SOHC (2002)
Malfunction Indicator Lamp: Testing and Inspection
MIL Circuit Troubleshooting
1. Turn the ignition switch ON (II) and watch the Malfunction Indicator Lamp (MIL).
Does the MIL come on and stay on for more than 20 seconds after turning the ignition switch ON (II)?
YES - If the MIL always come on and stays on, go to step 20. But if the MIL sometimes works normally, first check for these problems.
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An intermittent short in the wire between the PCM (A10) and the Data Link Connector (DLC).
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An intermittent open in the wire between the PCM (A21) and the DLC.
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An intermittent short in the wire between the PCM (A18) and the gauge assembly.
NO - If the MIL is always off, go to step 2. But if the MIL sometimes works normally, first check for these problems.
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A loose No.9 BACK UP LIGHT, INSTRUMENT LIGHT (7.5A) fuse in the driver's under-dash fuse/relay box.
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A loose ACG S (15A) fuse in the under-hood fuse/relay box.
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A loose No.1 FUEL PUMP (15A) fuse in the driver's under-dash fuse/relay box.
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A poor connection at PCM terminal A18.
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An intermittent open in the GRN/ORN wire between the PCM (A18) and the gauge assembly.
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An intermittent short in the wire between the PCM (C19), the manifold absolute pressure (MAP) sensor, and the countershaft speed sensor.
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An intermittent short in the wire between the PCM (C28), the throttle position (TP) sensor, exhaust gas recirculation (EGR) valve position
sensor, fuel tank pressure (FTP) sensor, and the mainshaft speed sensor.
2. Turn the ignition switch OFF and then ON (II) again.
Is the low oil pressure indicator light on?
YES - Go to step 3.
NO - Check for these problems.
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A blown No.9 BACK UP LIGHT, INSTRUMENT LIGHT (7.5A) fuse in the driver's under-dash fuse/relay box.
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A short or open in the wire between No.9 BACK UP LIGHT, INSTRUMENT LIGHT (7.5A) fuse and the gauge assembly.
3. Try to start the engine.
Does the engine start?
YES - Go to step 4.
NO - Go to step 7.
4. Turn the ignition switch OFF.
5. Connect PCM connector terminal A18 and body ground with a jumper wire.
6. Turn the ignition switch ON (II).
Is the MIL on?
YES - Substitute a known-good PCM and recheck. If the symptom/indication goes away, replace the original PCM.
NO - Check for an open in the wires between the PCM (A18) and the gauge assembly Also check for a blown MIL bulb.
7. Turn the ignition switch OFF.
