Component Inspection

Component Inspection

1. Check ignition switch
1. Ignition "ON" & engine "OFF" & PSD "ON"
2. Connect scantool to Data Link Connector (DLC).
3. Monitor the "start switch" Parameter on the Scantool. While positioning key "IGN START" position.
A. Specification : IGN "START" ON Signal duration < 30 sec




4. Is the monitored parameter within specifications ?
YES
1) Go to "Check RAM" procedure.
NO
1) Substitute with a known-good ignition switch and check for proper operation. If the problem is corrected, replace ignition switch and then go to"Verification Vehicle Repair" procedure.
2. Check RAM
1. Ignition "ON" & engine "OFF" & PSD "ON"
2. Measure voltage between terminal "BCM -RF1 (LH), BCM -RF2 (RH)" of RAM and chassis ground.
A. Specification : IGN "START" -> 12V or else 0V




3. Is the measured voltage within specifications ?
YES
1) Go to "Check IPM" procedure.
NO
1) Substitute with a known-good RAM and check for proper operation.If the problem is corrected, replace RAM and then go to "Verification of Vehicle Repair" procedure.
Check IPM
1. Connect scantool to Data Link Connector (DLC).
2. Ignition "ON" & engine "OFF"
3. Substitute with a known-good IPM and Check if the DTC is erased
4. Is the DTC erased ?
YES
1) Substitute with a known-good IPM and check for proper operation.
If the problem is corrected, replace IPM and then go to "Verification of Vehicle Repair" procedure.
NO
1) Go to "Check PSD" procedure.
4. Check PSD
1. Connect scantool to Data Link Connector (DLC).
2. Ignition "ON" & engine "OFF"
3. Substitute with a known-good PSD and Check if the DTC is erased.
4. Is the DTC erased ?
YES
1) Substitute with a known-good PSD and check for proper operation.
If the problem is corrected, replace PSD and then go to "Verification of Vehicle Repair" procedure.
NO
1) Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.