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STEP
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INSPECTION
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ACTION
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1
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• Disconnect car-navigation unit connector (16-pin).
• Jack up vehicle and run engine at low speed.
• Measure voltage at the following terminal of car-navigation unit connector (16-pin):
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– Terminal 1H (Vehicle speed signal)
• Is voltage approx. 2.5 V (reference)?
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Note
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• Vehicle speed signal is in electrical pulses of approx. 0 V to 5 V.
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Yes
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Replace car-navigation unit (available at Clarion service center) or get it repaired at Panasonic service center, then go to Step 4.
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No
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Go to next step.
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2*
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• Disconnect ABS HU/CM connector (28-pin) or DSC HU/CM connector (34-pin).
• Is there continuity between car-navigation unit connector (16-pin) terminal 1H and ABS HU/CM connector (28-pin) terminal V, or car-navigation unit connector (16-pin) terminal 1H and DSC HU/CM connector (34-pin) terminal AA?
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Yes
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Go to next step.
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No
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Repair wiring harness between car-navigation unit and ABS HU/CM, or car-navigation unit and DSC HU/CM, then go to Step 4.
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3
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• Inspect wiring harness between car-navigation unit connector (16-pin) terminal 1H and ABS HU/CM connector (28-pin) terminal V, or car-navigation unit connector (16-pin) terminal 1H and DSC HU/CM connector (34-pin) terminal AA for short to ground.
• Is there short to ground?
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Yes
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Repair wiring harness between car-navigation unit and ABS HU/CM, or car-navigation unit and DSC HU/CM, then go to next step.
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No
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Replace instrument cluster, then go to next step.
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4
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• Does vehicle locator mark operate normally?
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Yes
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Complete troubleshooting, then explain repairs to customer.
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No
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Recheck malfunction symptoms, then repeat from Step 1 if malfunction recurs.
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