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DTC 32: Transmission Range (Tr) Switch Circuit

NOTE: DTC is set if TCM does not receive any signal from TR switch, or receives 2 or more signals simultaneously. TR switch may also be known as Park/Neutral Position (PNP) switch.
  1. Perform TCM DIAGNOSTIC CIRCUIT CHECK. Place gear selector in "P" position. Turn ignition on. Using a test light connected to ground, backprobe TCM 10-pin harness connector terminal No. 8 (Orange/Black wire). See Figure. If test light comes on, go to next step. If test light does not come on, go to step 3).
  2. Using test light connected to ground, backprobe TCM 10-pin harness connector terminals No. 2 (Red wire), No. 5 (Green wire), No. 6 (Green/Red wire), No. 7 (Green/Blue wire) and No. 9 (Orange/Yellow wire), one at a time. See Figure. If test light does not come on at any terminal, go to step 5). If test light does come on for any terminal, go to step 6).
  3. Using a test light connected to ground, backprobe TR switch harness connector terminal No. 9 (Orange/Black wire). See Fig 1. If test light comes on, repair open in Orange/Black wire between TR switch and TCM. Retest system. If test light does not come on, go to next step.
  4. Using a test light connected to ground, backprobe TR switch harness connector terminal No. 8 (Yellow wire). See Fig 1. If test light comes on, replace TR switch. If test light does not come on, check TR switch harness connection. Repair as necessary. If connection is okay, repair open in Yellow wire between junction block and TR switch. Retest system.
  5. Place gear selector in "R" position. Using a test light connected to ground, backprobe TCM 10-pin harness connector terminal No. 2 (Red wire). See Figure. If test light comes on, go to step 7). If test light does not come on, go to step 8).
  6. Disconnect TCM 10-pin harness connector and retest terminals as specified in step 2). If test light does not come on at any terminal, replace TR switch. If test light does come on for any terminal, repair short to power in appropriate circuit. Retest system.
  7. Using a test light connected to ground, backprobe TCM 10-pin harness connector terminals No. 5 (Green wire), No. 6 (Green/Red wire), No. 7 (Green/Blue wire), No. 8 (Orange/Black wire) and No. 9 (Orange/Yellow wire), one at a time. See Figure. If test light does not come on at any terminal, go to step 9). If test light does come on for any terminal, replace TR switch and retest system.
  8. Using a test light connected to ground, backprobe TR switch harness connector terminal No. 1 (Red wire). See Fig 1. If test light comes on, repair open in Red wire between TR switch and TCM. If test light does not come on, replace TR switch and retest system.
  9. Place gear selector in "N" position. Using a test light connected to ground, backprobe TCM 10-pin harness connector terminal No. 9 (Orange/Yellow wire). See Figure. If test light comes on, go to next step. If test light does not come on, go to step 11).
  10. Using a test light connected to ground, backprobe TCM 10-pin harness connector terminals No. 2 (Red wire), No. 5 (Green wire), No. 6 (Green/Red wire), No. 7 (Green/Blue wire) and No. 8 (Orange/Black wire), one at a time. See Figure. If test light does not come on at any terminal, go to step 12). If test light does come on at any terminal, replace TR switch and retest system.
  11. Using a test light connected to ground, backprobe TR switch harness connector terminal No. 10 (Orange/Yellow wire). See Fig 1. If test light comes on, repair open in Orange/Yellow wire between TR switch and TCM. If test light does not come on, replace TR switch and retest system.
  12. Place gear selector in "D" position. Using a test light connected to ground, backprobe TCM 10-pin harness connector terminal No. 6 (Green/Red wire). See Figure. If test light comes on, go to next step. If test light does not come on, go to step 14).
  13. Using a test light connected to ground, backprobe TCM 10-pin harness connector terminals No. 2 (Red wire), No. 5 (Green wire), No. 7 (Green/Blue wire), No. 8 (Orange/Black wire) and No. 9 (Orange/Yellow wire), one at a time. See Figure. If test light does not come on at any terminal, go to step 15). If test light does come on at any terminal, replace TR switch and retest system.
  14. Using a test light connected to ground, backprobe TR switch harness connector terminal No. 2 (Green/Red wire). See Fig 1. If test light comes on, repair open in Green/Red wire between TR switch and TCM. If test light does not come on, replace TR switch and retest system.
  15. Place gear selector in "2" position. Using a test light connected to ground, backprobe TCM 10-pin harness connector terminal No. 5 (Green wire). See Figure. If test light comes on, go to next step. If test light does not come on, go to step 17).
  16. Using a test light connected to ground, backprobe TCM 10-pin harness connector terminals No. 2 (Red wire), No. 6 (Green/Red wire), No. 7 (Green/Blue wire), No. 8 (Orange/Black wire) and No. 9 (Orange/Yellow wire), one at a time. See Figure. If test light does not come on at any terminal, go to step 18). If test light does come on at any terminal, replace TR switch and retest system.
  17. Using a test light connected to ground, backprobe TR switch harness connector terminal No. 3 (Green wire). See Fig 1. If test light comes on, repair open in Green wire between TR switch and TCM. If test light does not come on, replace TR switch and retest system.
  18. Place gear selector in "L" position. Using a test light connected to ground, backprobe TCM 10-pin harness connector terminal No. 7 (Green/Blue wire). See Figure. If test light comes on, go to next step. If test light does not come on, go to step 20).
  19. Using a test light connected to ground, backprobe TCM 10-pin harness connector terminals No. 2 (Red wire), No. 5 (Green wire), No. 6 (Green/Red wire), No. 8 (Orange/Black wire) and No. 9 (Orange/Yellow wire), one at a time. See Figure. If test light does not come on at any terminal, check for poor connection at TCM. Repair as necessary. If connection is okay, replace TCM. If test light does come on at any terminal, replace TR switch and retest system.
  20. Using a test light connected to ground, backprobe TR switch harness connector terminal No. 4 (Green/Blue wire). See Fig 1. If test light comes on, repair open in Green/Blue wire between TR switch and TCM. If test light does not come on, replace TR switch and retest system.
Fig 1: Identifying TR Switch Harness Connector Terminals
G95D21140Courtesy of SUZUKI OF AMERICA CORP.
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