Code 16 - Fuel Injector Circuit
- Turn ignition off. Remove ACG fuse (No. 15, 7.5-amp) fuse from underdash fuse box for 10 seconds to reset ECM. Retrieve codes. If Code 16 does not appear, problem is intermittent. Inspect for poor connections at ECM, fuel injectors, fuel injector resistor, and wiring harness connectors. Test-drive vehicle and retest.
- If Code 16 exists, start engine. Listen for clicking sound at each injector. If any injector does not click, turn ignition off. Unplug injector connector from affected injector. Measure resistance between injector terminals. If resistance is 1.5-2.5 ohms, go to next step. If resistance is not 1.5-2.5 ohms, replace injector.
- Turn ignition on. Measure voltage between fuel injector wiring harness connector Red/Black wire and body ground. If battery voltage exists, go to step 6). If battery voltage does not exist, turn ignition off.
- Unplug 8-pin connector at injector resistor. Turn ignition on. Measure voltage between Yellow/Black wire terminal (+) and body ground. If battery voltage exists, go to next step. If battery voltage does not exist, repair open in Yellow/Black wire between injector resistor and main relay.
- Measure resistance between terminal "E" and all other terminals. See Fig 1 . If resistance is not 5-7 ohms, replace injector resistor. If resistance is 5-7 ohms, repair open in Red/Black wire between 2-pin connector and injector resistor.
- If battery voltage existed in step 3), turn ignition off. Reconnect fuel injector wiring. Connect ECM Test Harness (07LAJ-PT3010A
) between ECM and ECM harness. See Figure
. Turn ignition on. Test for battery voltage between A23 (-) and following test terminals.
- Injector No. 1: A1 (+)
- Injector No. 2: A3 (+)
- Injector No. 3: A5 (+)
- Injector No. 4: A2 (+)
- Injector No. 5: A4 (+)
- Injector No. 6: A6 (+)
If battery voltage does not exist, repair open in wire between injector and ECM connector terminal A1, A2, A3, A4, A5, or A6. If battery voltage exists, temporarily substitute known good ECM, then retest system.