DTC 62-20
DTC 62-20: Short in Passenger's Seat Belt Buckle SwitchNOTE: If DTC 61-20 is also set, troubleshoot and repair DTC 61-20 before proceeding.
1. Erase the DTC memory.
2. Turn the ignition switch ON (II), then buckle and unbuckle the front passenger's seat belt several times.
3. Read the DTC.
Is DTC 62-20 indicated?
YES - Go to step 4.
NO - Intermittent failure, system is OK at this time. Go to Troubleshooting Intermittent Failures. Troubleshooting Intermittent Failures If another DTC is indicated, Go to the DTC Troubleshooting Index. Diagnostic Trouble Code Descriptions
4. Turn the ignition switch OFF.
5. Disconnect the rear harness 3P connector from the passenger's seat belt buckle switch 3P connector (A).
6. Buckle the passenger's seat belt.
Check resistance between the No. 1 and No. 3 terminals of the passenger's seat belt buckle switch 3P connector. There should be 0 - 1 ohms.
Check resistance between the No. 1 and No. 2 terminals of the same connector. There should be an open circuit or at least 1 Mohms.
Are the resistances as specified?
YES - Go to step 7.
NO - Replace the passenger's seat belt buckle assembly, then clear the DTC.
7. Unbuckle the passenger's seat belt.
Check resistance between the No. 1 and No. 2 terminals of the passenger's seat belt buckle switch 3P connector. There should be 0 - 1 ohms.
Check resistance between the No. 1 and No. 3 terminals of the same connector. There should be an open circuit or at least 1 Mohms.
Are the resistances as specified?
YES - Go to step 8.
NO - Replace the passenger's seat belt buckle assembly, then clear the DTC.
8. Check for continuity between the No. 2 terminal of the passenger's seat belt buckle switch 3P connector and body ground, and between the No. 3 terminal and body ground. There should be an open circuit or at least 1 Mohms.
Is the resistance as specified?
YES - Go to step 9.
NO - Replace the passenger's seat belt buckle assembly.
9. Disconnect the negative cable from the battery, and wait for 3 minutes.
10. Disconnect both seat belt tensioner 2P connectors from the SRS main harness.
11. Disconnect SRS unit connector B (28P) from the SRS unit.
12. Check resistance between the No. 2 terminal of the rear harness 3P connector and body ground. There should be an open circuit or at least 1 Mohms.
Is the resistance as specified?
YES - Go to step 13.
NO - Short to ground in the rear harness or SRS main harness; replace the faulty harness.
13. Check resistance between the No. 3 terminal of the rear harness 3P connector and body ground. There should be an open circuit or at least 1 Mohms.
Is the resistance as specified?
YES - Faulty SRS unit; replace the SRS unit.
NO - Short to ground in the rear harness or SRS main harness; replace the faulty harness.