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AUTOMATIC TRANSMISSION (AW30-40LE) 7A-77 DTC P1120 (FLASHING CODE 22) PWM THROTTLE SIGNAL FAILURE (TH) (For TFR/S) Step Action Value(s) Yes No 1 1. Connect a analog voltmeter between the TCM 28 pin connector terminal (6) and TCM 2. Turn the ignition "ON". Is the voltage within the specified value? 4.4-4.6 V * Go to Step 2 Go to Step 3 2 Open the throttle fully. 0.4-0.6 V * The problem is intermittent. Refer to "Diagnostic aids". Go to Step 3 3 1. Turn the ignition "ON". pin connector terminal (26) and ground Is the voltage within the specified value? 4.4-4.6 V * Go to Step 4 Go to Step 6 4 Open the throttle fully. 0.4-0.6 V * Go to Step 5 Go to Step 6 5 Check the wiring harness between the TCM 28 Go to Step 9 6 1. Disconnect the TPS connector. connector terminal (C93-3) and (C93-1) Is the voltage within the specified value? 4.99-5.01 V Go to Step 7 Go to Step 8 7 Check the TPS connectors. If OK, replace the Go to Step 9 8 Check the wiring harness between the TPS and Go to Step 9 |