DTC 21: Ignition Signal
- Start engine. If engine does not start, go to next step. If engine starts, go to step 3) or to step 4).
- Check Ground Circuit
If engine does not start, turn ignition off. Disconnect Power Transistor Unit (PTU) harness connector. Verify harness continuity between PTU harness connector terminal "D" (Black wire) and engine ground. See Fig 1 -Fig 6 . If continuity is present, go to step 4). If continuity is not present, repair harness or connectors as necessary and perform FINAL CHECK . - Search For Malfunctioning Circuit Using CONSULT
Turn ignition off and connect CONSULT. Perform POWER BALANCE in ACTIVE TEST mode with CONSULT. Search for circuit which does not produce a momentary engine speed drop. - Check Output Signal Circuit
Turn ignition off. Disconnect ECM harness connector and PTU harness connector. Verify harness continuity between ECM harness connector terminals and PTU harness connector terminals as follows:- ECM terminal No. 1 and PTU terminal "G" (Yellow wire).
- ECM terminal No. 2 and PTU terminal "F" (Light Green/Black wire).
- ECM terminal No. 3 and PTU terminal "E" (White wire).
- ECM terminal No. 11 and PTU terminal "C" (Pink/Black wire).
- ECM terminal No. 12 and PTU terminal "B" (Red/Blue wire).
- ECM terminal No. 13 and PTU terminal "A" (Gray wire).
See Fig 6 . If continuity is present, go to next step. If continuity is not present, verify harness continuity between ECM connector and PTU connector. Repair harness or connectors as necessary.
- Check Component
Inspect power transistor unit. See SYSTEM/COMPONENT TESTS article. Replace power transistor unit if necessary and perform FINAL CHECK .