Table 1: | Transmission Shift Speed Schedule -- Power Shift Mode |
Table 2: | Transmission Shift Speed Schedule -- Normal Shift Mode |
Table 3: | Manual Road Test Diagnosis |
Important:
• Perform the road test following the sequence given. • Km/h (mph) shift points will vary with actual throttle position and driver
habits • Engine coolant temperature must be at normal operating temperature. • Compare the results of the road test with the Transmission Shift Speed
Schedules below. Use these results with the diagnosis information in this
section for the transmission evaluation. • This test should only be performed when traffic and road conditions permit. • Observe all traffic and safety regulations.
• | The Drive engagement from the Neutral position takes approximately 1.2 seconds. |
• | The Reverse engagement from the Neutral position takes approximately 1.5 seconds. |
• | The reverse and the drive engagements should be immediate, but not harsh. |
• | If the reverse and the drive engagements are slow to engage or seem too harsh, refer to Line Pressure Check for possible causes and corrections. |
Important: Before repeating this test, wait at least one minute after returning the manual selector to the Neutral (N) position.
• | Second gear |
• | Third gear |
• | Fourth gear (Overdrive) |
Important: The TCC will not apply and fourth gear upshift is delayed until the engine coolant temperature has reached at least 86°C (30°F).
Test the power shift using the following procedure:
• | The manual selector is in the Drive (D) range |
• | The OD switch is pressed |
• | The Power/Normal switch is in the Power (P) position |
• | The TCC releases. |
• | The transmission immediately downshifts to third gear. |
Test the normal shift using the following procedure:
• | The manual selector is in the Drive (D) range |
• | The OD switch is pressed |
• | The Power/Normal switch is in the Normal (N) position |
• | The TCC releases. |
• | The transmission immediately downshifts to third gear. |
Test the power shift mode using the following procedure:
• | The manual selector is in the Drive (D) position |
• | The OD switch is pressed |
• | The Power/Normal switch is in the Power (P) position |
• | The TCC releases. |
• | The transmission immediately downshifts to second gear. |
Test the normal shift mode using the following procedure:
• | The manual selector is in the Drive (D) position |
• | The OD switch is pressed |
• | The Power/Normal switch is in the Normal (N) position |
• | The TCC releases. |
• | The transmission immediately downshifts to second gear. |
1.1. | Move the manual selector to the Drive (D) selector. |
1.2. | Press the OD switch. |
1.3. | Place the Power/Normal switch in the Power (P) position. |
1.4. | Release the accelerator pedal. |
1.5. | Release the OD switch. |
1.6. | Verify the following operating conditions: |
• | The TCC releases. |
• | The transmission downshifts immediately to third gear. |
• | The engine reduces the vehicle speed. |
2.1. | Move the manual selector to the Drive (D) selector. |
2.2. | Release the accelerator pedal. |
2.3. | Move the manual selector to Second (2) gear. |
2.4. | Verify the following operating conditions: |
• | The transmission downshifts immediately to second gear. |
• | The engine reduces the vehicle speed. |
2.5. | If no engine braking is available, test for a faulty second coast brake. |
3.1. | Move the manual selector to the Drive (D) selector. |
3.2. | Release the accelerator pedal. |
3.3. | Move the manual selector to the Low (L) position. |
3.4. | Verify the following operating conditions: |
• | The transmission downshifts immediately to first gear. |
• | The engine reduces the vehicle speed. |
3.5. | If no engine braking is available, test for a faulty reverse band. |
Set the Power/Normal switch to the Power (P) position.
Set the Power/Normal switch to the Normal (N) position.
Verify that the gear downshifts and the TCC release occur properly as shown in the shift speed tables below. If the transmission is not within specifications, refer to Line Pressure Check for possible causes and corrections.
Throttle Position | 1st to 2nd | 2nd to 3rd | 3rd to 4th | 4th to 3rd | 3rd to 2nd | 2nd to 1st |
---|---|---|---|---|---|---|
km/h (mph) | km/h (mph) | km/h (mph) | km/h (mph) | km/h (mph) | km/h (mph) | |
Closed | 18 (11) | 36 (23) | 48 (30) | 35 (22) | 29 (18) | 7 (4) |
Full Open | 49 (31) | 94 (59) | 132 (83) | 120 (75) | 85 (53) | 42 (26) |
Throttle Position | 1st to 2nd | 2nd to 3rd | 3rd to 4th | 4th to 3rd | 3rd to 2nd | 2nd to 1st |
---|---|---|---|---|---|---|
km/h (mph) | km/h (mph) | km/h (mph) | km/h (mph) | km/h (mph) | km/h (mph) | |
Closed | 16 (10) | 32 (20) | 45 (28) | 35 (22) | 29 (18) | 7 (4) |
Full Open | 44 (28) | 83 (52) | 120 (75) | 112 (70) | 74 (46) | 39 (24) |
This procedure determines whether a problem lies in the electronic control system or in the transmission itself. This procedure tests the gears being used in the L, the 2, or the D ranges with the shift solenoids disconnected from the PCM.
• | Diagnostic System Check - Engine Controls in Engine Controls - 2.0L |
• | Diagnostic System Check - Engine Controls in Engine Controls - 2.5L |
Observe that 1st gear is being used.
Observe that the transmission is in 3rd gear.
• | If the transmission operates normally with the electronic control system disabled, but malfunctions with the electronic control system connected, the problem lies in the electronic control system. Refer to the appropriate DTC test. |
• | If the transmission is still malfunctioning with the electronic control system disabled, the problem lies in the transmission. Refer to the Manual Road Test Diagnosis table below. For additional diagnosis information, refer to Line Pressure Check and Stall Speed Test |
Condition | Possible Cause | Correction |
---|---|---|
No 1st to 3rd Gear Upshift |
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No 3rd to 4th Gear Upshift |
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