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Home >> Suzuki >> 2006 >> Verona Base >> Repair and Diagnosis >> Transmission >> Automatic Transmission >> Diagnostic Information and Procedures >> DTC P1606: Failure of External Watchdog >> DTC Troubleshooting
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DTC Troubleshooting

TEST PROCEDURE - FAILURE OF EXTERNAL WATCHDOG

Step Action Value(s) Yes No
1 Perform an On-Board Diagnostic (OBD II) System Check.
Is the check completed?
- Go to Step 2 Go to ON-BOARD DIAGNOSTIC (OBD II) SYSTEM CHECK .
2
  1. Install the scan tool.
  2. Turn the ignition ON, with the engine OFF.

Does the scan tool display P1606?
- Go to Step 3 Go to Diagnostic Aids .
3 Inspect Ef30 or F10 fuse for open.
Was a problem found?
- Go to Step 4 Go to Step 5
4 Replace the fuse as necessary.
Is the action completed?
- System OK -
5
  1. Turn the ignition OFF.
  2. Disconnect the TCM wiring connector.
  3. Inspect the wiring harness for short to battery between the fuses (Ef30 or F10) and the TCM terminals (B3, C15 or C16).

Was a problem found?
- Repair the wiring harness. Go to Step 6
6 Inspect the wiring harness for open between the fuses (Ef30 or F10) and the TCM terminals (B3, C15 or C16).
Was a problem found?
- Repair the wiring harness. Go to Step 7
7 Inspect the wiring harness for open or short to ground between TCM terminals (B12 or B13) and G103.
Was a problem found?
- Repair the wiring harness. Go to Step 8
8 Inspect the wiring harness for short to power between the terminals (B12 or B13) and G103.
Was a problem found?
- Repair the wiring harness. Go to Step 9
9 Replace the TCM.
Is the replacement complete?
- Go to Step 10 -
10
  1. Using the scan tool, clear the DTCs.
  2. Road test the vehicle within the conditions for setting this DTC as specified in the text.

Does the scan tool indicate that this diagnostic has run and passed?
- Go to Step 11 Go to Step 2
11 Check if any DTCs are set.
Are any DTCs displayed that have not been diagnosed?
- Go to applicable DTC table. System OK