Diagnostic procedure
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STEP
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INSPECTION
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ACTION
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1
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VERIFY RELATED SERVICE INFORMATION AVAILABILITY
• Check for related Service Information availability.
• Is any related Service Information available?
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Yes
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Perform repair or diagnosis according to available Service Information.
• If vehicle is not repaired, go to the next step.
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No
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Go to the next step.
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2
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CLASSIFY NO DTC DETECTED OR SOME DTC DETECTED
• Clear DTC from memory using WDS or equivalent.
• Turn the ignition switch off and to the ON position (Engine off).
• Has DTC P1624 been detected?
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Yes
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Go to step 10.
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No
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Go to the next step.
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3
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INSPECT IMMOBILIZER CONTROL MODULE CONNECTOR FOR POOR CONNECTION
• Turn the ignition switch off.
• Disconnect immobilizer control module connector.
• Inspect for poor connection (damaged, pulled-out terminals, corrosion, etc.).
• Is there any malfunction?
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Yes
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Repair or replace terminals, then go to Step 19.
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No
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Go to the next step.
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4
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INSPECT GROUND CIRCUIT OF IMMOBILIZER CONTROL MODULE FOR OPEN CIRCUIT
• Measure the resistance between immobilizer control module terminal C (wiring harness-side) and body ground.
• Is there continuity?
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Yes
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Go to the next step.
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No
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Repair or replace harness for open, then go to Step 19.
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5
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INSPECT COIL TERMINAL
• Disconnect coil connector.
• Inspect for bent terminals.
• Is there any malfunction?
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Yes
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Repair or replace the terminals, then go to Step 19.
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No
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Go to the next step.
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6
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INSPECT COIL FOR SHORT CIRCUIT
• Inspect for continuity between coil terminal A (part-side) and body ground.
• Is there continuity?
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Yes
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Replace the coil, then go to Step 19.
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No
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Go to the next step.
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7
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INSPECT COIL CIRCUIT FOR SHORT
• Connect coil connector.
• Inspect for continuity between immobilizer control module terminal F (wiring harness-side) and body ground.
• Is there continuity?
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Yes
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Repair or replace the wiring harness for short circuit, then go to Step 19.
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No
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Go to the next step.
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8
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INSPECT PCM CONNECTOR FOR POOR CONNECTION
• Disconnect the PCM connector.
• Inspect for poor connection (such as damaged/pulled-out terminals, corrosion).
• Is there any malfunction?
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Yes
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Repair or replace the wiring harness, then go to Step 19.
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No
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Go to the next step.
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9
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INSPECT COMMUNICATION LINE FOR OPEN
• Disconnect the PCM connector.
• Inspect for continuity between immobilizer control module terminal A (wiring harness-side) and PCM terminal 59.
• Is there continuity?
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Yes
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Go to step 19.
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No
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Repair or replace the wiring harness for open circuit, then go to Step 19.
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10
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CLASSIFY MALFUNCTION BY ANOTHER DETECTED DTCS
• Has DTC P1602 detected?
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Yes
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Go to Step 14.
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No
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Go to the next step.
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11
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INSPECT COIL CONNECTOR FOR POOR CONNECTION
• Disconnect coil connector.
• Inspect for poor connection (such as damaged/pulled-out terminals, corrosion).
• Is there any malfunction?
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Yes
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Repair or replace the wiring harness, then go to Step 19.
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No
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Go to the next step.
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12
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INSPECT COIL FOR OPEN CIRCUIT
• Disconnect coil connector.
• Measure the resistance between coil terminals (part-side).
• Is there continuity?
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Yes
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Go to the next step.
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No
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Replace the coil, then go to Step 19.
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13
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INSPECT COIL CIRCUIT FOR OPEN CIRCUIT
• Connect coil connector.
• Measure the resistance between immobilizer connector F and D (wiring harness-side).
• Is there continuity?
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Yes
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Go to Step 19.
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No
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Repair or replace the wiring harness for open circuit, then go to Step 19.
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14
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CLASSIFY MALFUNCTION BY ANOTHER DETECTED DTC.
• Has immobilizer control module DTC 03 detected?
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Yes
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Key has not transponder, change to registered key.
Then go to Step 19.
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No
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Go to the next step.
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15
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CLASSIFY MALFUNCTION BY ANOTHER DETECTED DTC.
• Has immobilizer control module DTC 01 detected?
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Yes
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Key that using for ignition is not registered.
Reprogram key or using another registered key, then go to the next step.
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No
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Go to the next step.
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16
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INSPECT IMMOBILIZER CONTROL MODULE CONNECTOR FOR POOR CONNECTION
• Turn the ignition switch off.
• Disconnect immobilizer control module connector.
• Inspect for poor connection (damaged, pulled-out terminals, corrosion, etc.).
• Is there any malfunction?
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Yes
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Repair or replace the wiring harness, then go to the next step.
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No
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Go to the next step.
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17
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INSPECT IMMOBILIZER CONTROL MODULE POWER CIRCUIT FOR OPEN CIRCUIT
• Turn the ignition switch to the ON position (Engine off).
• Measure voltage between immobilizer connector J (wiring harness-side) and body ground.
• Is the voltage B+?
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Yes
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Go to the next step.
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No
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Repair or replace the wiring harness for open circuit, then go to Step 19.
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18
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INSPECT COMMUNICATION LINE FOR SHORT TO HARNESS
• Measure the resistance between immobilizer control module terminal A (wiring harness-side) and body ground.
• Is there continuity?
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Yes
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Repair or replace harness for short, then go to the next step.
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No
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Go to the next step.
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19
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VERIFY TROUBLESHOOTING OF DTC P1602 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the WDS or equivalent.
• Turn the ignition switch off, then start engine.
• Is the same DTC present?
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Yes
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Replace the PCM, then go to the next step.
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No
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Go to the next step.
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20
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VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
(See AFTER REPAIR PROCEDURE [AJ].)
• Is there any DTC present?
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Yes
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Go to the applicable DTC inspection.
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No
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Troubleshooting completed.
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