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NO.22 NO ENGINE BRAKING IN 1GR POSITION OF M RANGE [JA5AX-EL]

id050305802700

22 | No engine braking in 1GR position of M range
DESCRIPTION | • Engine speed drops to idle but vehicle coasts when accelerator pedal released during cruising at medium to high speeds. • Engine speed drops to idle but vehicle coasts when accelerator pedal released when in M range (1GR) at low vehicle speed.
POSSIBLE CAUSE | • Clutch slipped, burned (Reduction brake) - Line pressure low • Malfunction of VSS • Malfunction of input/turbine speed sensor • Malfunction of sensor ground • Malfunction of control valve body - M range switch on not judged by TCM (short, or open circuit, poor operation) • Malfunction of M range switch signal Note • Before following troubleshooting steps, make sure that Automatic Transaxle On-Board Diagnostic and Automatic Transaxle Basic Inspection are conducted.

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | • Inspect TR switch adjustment. • Does TR switch adjusted properly? • Select PNP PID. • Is PNP PID reading okay when selecting range? | Yes | Go to next step.
No | Adjust TR switch as necessary. (See TRANSAXLE RANGE (TR) SWITCH ADJUSTMENT [JA5AX-EL].) Inspect TR switch. Repair or replace any defective parts.
2 | • Do following symptoms concurrently occur? - Engine flares up or slips during acceleration - Engine flares up or slips when shifting | Yes | Go to symptom troubleshooting No.14 "Engine flares up or slips when upshifting or downshifting" or No.15 "Engine flares up or slips when accelerating vehicle".
No | Go to next step.
3 | • Verify test results. - If okay, return to diagnostic index to service any additional symptoms. - If malfunction remains, inspect related Service Informations and perform repair or diagnosis. • If vehicle repaired, troubleshooting completed. • If vehicle not repaired or additional diagnostic information not available, replace TCM.