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5. CHECKING THE (T16) TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT FOR AN OPEN Turn the ignition off to the lock position. Connect a jumper wire between (A104) Fused B+ circuit and the (T16) Ignition on, engine not running. Using a 12-volt test light connected to ground, check all (T16) Trans- Does the test light illuminate brightly? Yes >> Go To 6 No >> Repair the (T16) Transmission Control Relay Output cir- cuit(s) for an open or high resistance. Perform 42RLE TRANSMISSION VERIFICATION TEST - 6. CHECK THE TRANSMISSION CONTROL RELAY Turn the ignition off to the lock position. Install a substitute Relay in place of the Transmission Control Relay. Start the engine. Using a voltmeter, measure the battery voltage. With the scan tool, monitor the Transmission Switched Battery Voltage. Compare the scan tool Transmission Switched Battery voltage to the actual battery voltage. Is the scan tool voltage within 2.0 volts of the battery voltage? Yes >> Replace the Transmission Control Relay. Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMISSION/ No >> Using the schematics as a guide, check the Powertrain Control Module (PCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. Check for Ser- Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMISSION/ 21 - 68 AUTOMATIC TRANSMISSION 42RLE - ELECTRICAL DIAGNOSTICS KJ |