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6E-306 Engine Control System (4HK1) 4 1. Test the exhaust brake switch signal circuit 2. Repair the circuit(s) as necessary. Did you find and correct the condition? — Go to Step 30 Go to Step 29 5 1. Turn OFF the ignition. 2. Inspect the Fuel Heater (10A) fuse in the Is the Fuel Heater (10A) fuse open? — Go to Step 6 Go to Step 7 6 Replace the Fuel Heater (10A) fuse. If the fuse Did you complete the repair? — Go to Step 30 — 7 1. Turn OFF the ignition. 2. Disconnect the exhaust brake switch B-69 3. Connect a test lamp between the voltage feed 4. Start the engine. Does the test lamp illuminate? — Go to Step 8 Go to Step 9 8 1. Observe the Exhaust Brake Switch parameter Does the Tech 2 indicate ON when the circuit is — Go to Step 11 Go to Step 10 9 Repair the open circuit or high resistance on the Did you complete the repair? — Go to Step 30 — 10 1. Test the exhaust brake switch signal circuit 2. Repair the circuit(s) as necessary. Did you find and correct the condition? — Go to Step 30 Go to Step 12 Step Action Value(s) Yes No |