Measure voltage between body ground and the appropriate ECM/PCM connector terminal (see table). ECM/PCM CONNECTOR B (24P) Wire side of female terminals PROBLEM CYLINDER DTC ECM/PCM TERMINAL WIRE COLOUR No. 1 P0301 B5 BRN No. 2 P0302 B4 RED No. 3 P0303 B3 BLU No. 4 P0304 B2 YEL Is there battery voltage? YES - Go to step 33. NO - Go to step 42. Turn the ignition switch OFF, and remove the air cleaner (see page 11-146). Disconnect the injector 2P connector on the problem cylinder. Measure the resistance between the injector 2P connector terminals No. 1 and No. 2. INJECTOR 2P CONNECTOR Terminal side of male terminals Is there 10 ohms-13ohms? YES - Go to step 36. NO - Replace the injector (see page 11-113).

Exchange the injector in the problem cylinder with one from another cylinder. Install the air cleaner (see page 11-146), and reset the ECM/PCM. Let the engine idle for 2 minutes. Test-drive the vehicle several times in the range of the freeze data or under various conditions if there was no freeze data. Check the DTC or the Temporary DTC with a scan tool. Is DTC or Temporary DTC P0301, P0302, P0303, or P0304 indicated? YES - Go to step 41. NO - Intermittent misfire due to injector malfunction etc. Determine which cylinder (s) had the misfire. Does the misfire occur in the other cylinder whose injector was exchanged? YES - Replace the faulty injector. NO - Substitute a known-good ECM/PCM and recheck (see page 11-6). If symptom/indication goes away, replace the original ECM/PCM. Turn the ignition switch OFF. Remove the air cleaner (see page 11-146). Disconnect the injector 2P connector on the problem cylinder. Turn the ignition switch ON (II).