|
|
Content .. 1014 1015 1016 1017 ..
7A2-98 TRANSMISSION CONTROL SYSTEM (AW30–40LE)
Condition For Setting The DTC The TCM detects following conditions for 0.5 seconds • Voltage at connector pin is 0V when solenoid is “ON”. (DTC P0976) • Voltage at connector pin is ignition voltage when solenoid is “OFF”. (DTC P0977) Action Taken When The DTC Sets • No L-up control. • No line pressure reduction control at gear change. • No torque reduction control. • No squat control. • No slope control (keep mode). • No line pressure reduction control at garage. • No input revolution sensor failure detection. • No shift solenoid failure detection. • No L-up solenoid failure detection. • Change to emergency mode. • Check Trans “ON”. • DTC stored. • MIL request “ON”. (EURO 4 only)
Conditions For Clearing The DTC • The DTC can be cleared from the TCM history by using a scan tool. • The DTC will be cleared from history when the vehicle has achieved 40 warm-up cycles without a • After more than 1 second has elapsed after the ignition key has been turned “ON”, short between Diagnostic Aids • Inspect the wiring for poor electrical connection at the TCM. Look for possible bent, backed out, deformed
Inspect for a broken wire inside the insulation. • When diagnosing for a possible intermittent short or open condition, move the wiring harness while
Circuit/System Testing DTC P0976 or P0977
Step Action Value(s) YES NO 1
Was the On-Board Diagnostic (OBD) System Check — Go to Step 2 Go to OBD System Check 2 1. Install a scan tool. 2. Start the engine. 3. Depress the brake pedal and place the select lever in D position. 4. Press the 3rd start switch. (Turn the 3rd start switch “ON”.) 5. Press the 3rd start switch again. (Turn the 3rd start switch “OFF”.)
Does a scan tool indicate DTC P0976 or P0977? — Go to Step 3 Refer to Diagnostic Aids 3 1. Turn “ON” the ignition with the engine “ON”. 2. Place the selector lever in the “P” position. 3. Measure the voltage between terminal C94-15 and terminal C94-1 on the TCM pigtail connector by 5-
Is the voltage specified value? 8 ∼ 16V Go to Step 4 Go to Step 5 |