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 DTC 71 B5 BRN No. 2 DTC 72 B4 RED No. 3 DTC 73 B3 BLU No. 4 DTC 74 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 -13 ohms? YES - Go to step 36. NO - Replace the injector (see page 11-113).

Exchange the injector from the problem cylinder with one from another cylinder. Install the air cleaner (see page 11-146), and reset the ECM/PCM. Jump the SCS line (see step 2 on page 11-167). Let the engine idle for 2 minutes. Test-drive the vehicle several times under various conditions. Is DTC 71, 72, 73 or 74 indicated? YES - Go to step 41. NO - Intermittent misfire due to bad contact in the injector connector (no misfire at this time). Determine which cylinder 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. 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).