CL TYPE S V6-3.2L SOHC (2001)
Malfunction Indicator Lamp: Testing and Inspection
A/T Model
MIL Circuit Troubleshooting
A/T Model
1. Turn the ignition switch ON (II), and watch the Malfunction Indicator Lamp (MIL).
Does the MIL come on and stay on?
YES - If the MIL always come on and stays on, go to step 12. 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.
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An intermittent open in the wire between the PCM (A21) and the data link connector.
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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 (7.5 A) fuse in the driver's under-dash fuse/relay box.
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A loose ACG S (15 A) fuse in the under-hood fuse/relay box.
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A loose No.1 FUEL PUMP (15 A) 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 MAP sensor and the countershaft speed sensor.
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An intermittent short in the wire between the PCM (C28), the TP sensor, EGR valve position sensor, fuel tank pressure sensor and the
mainshaft speed sensor.
2. Turn the ignition switch OFF and then ON (II) again.
Is the low oil pressure 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 (7.5 A) 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 (7.5 A) fuse and the gauge assembly.
3. Try to start the engine.
Does the engine start?
YES - Go to step 4.
NO - Go to step 6.
4. Turn the ignition switch OFF, and connect PCM connector terminal A18 and body ground with a jumper wire.
5. 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.
