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Test H: No Communication With Passenger Seat Module

NOTE: Connector C364 is a 2-terminal connector. Identify by wire color. See WIRING DIAGRAMS  .
  1. Test Power Supply To Passenger Seat Module  - Disconnect passenger seat module harness connector C364. Measure voltage at terminal No. 1 (Black/White wire) at passenger seat module harness connector C364. If battery voltage does not exist, go to next step. If battery voltage exists, go to step 7).
  2. Test Fuse No. 18  - Remove fuse No. 18 (30-amp) from power distribution box in engine compartment. If fuse is blown, go to next step. If fuse is not blown, repair open in Black/White wire.
  3. Test Black/White Wire For Short  - Ensure fuse No. 18 is still removed. Measure resistance between ground and terminal No. 1 (Black/White wire) at passenger seat module harness C364. If resistance 10,000 ohms or less, go to next step. If resistance is greater than 10,000 ohms, go to step 5).
  4. Test Black/White Wire For Short  - Disconnect lumbar switch harness connector C344. Measure resistance between ground and terminal No. 3 (Black/White wire) at passenger seat module harness connector C364. If resistance is greater than 10,000 ohms, replace lumbar switch. If resistance 10,000 ohms or less, repair short in Black/White wire.
  5. Test Red/White Wire For Short  - Disconnect lumbar switch harness connector C344. Measure resistance between ground and terminal No. 5 (Red/White wire) at lumbar switch harness connector C344. If resistance is greater than 10,000 ohms, go to next step. If resistance is 10,000 ohms or less, repair short in Red/White wire.
  6. Test Red/Black Wire For Short  - Measure resistance between ground and terminal No. 1 (Red/Black wire) at lumbar switch harness connector C344. If resistance is greater than 10,000 ohms, replace passenger seat module. If resistance is 10,000 ohms or less, repair short in Red/Black wire.
  7. Test Power Supply To Passenger Seat Module  - Disconnect passenger seat module harness connector C320. Measure voltage at terminal No. 12 (Black/Light Green wire) at passenger seat module harness connector C320. If battery voltage does not exist, go to next step. If battery voltage exists, go to step 11).
  8. Test Fuse No. 12  - Remove fuse No. 12 (10-amp) from instrument panel fuse box. If fuse is not blown, go to next step. If fuse is blown, go to step 10).
  9. Test Black/Light Green Wire For Open  - Measure voltage at input side of fuse No. 12. If battery voltage exists, repair open in Black/Light Green wire. If battery voltage does not exist, repair open in Black/White wire.
  10. Test Black/Light Green Wire For Short  - Ensure fuse No. 12 is still removed. Measure resistance between ground and terminal No. 12 (Black/Light Green wire) at passenger seat module harness connector C320. If resistance is greater than 10,000 ohms, replace passenger seat module. If resistance is 10,000 ohms or less, repair short in Black/Light Green wire.
  11. Test Black/Light Green Wire For Open  - Measure resistance between ground and terminal No. 11 (Black/Light Green wire) at passenger seat module harness connector C320. If resistance is greater than 5 ohms, repair open in Black/Light Green wire. If resistance is 5 ohms or less, test module communications. See MODULE COMMUNICATIONS NETWORK article.
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