[23A] AUTOMATIC TRANSMISSION (FF) - - TROUBLESHOOTING <A/T> - DIAGNOSTIC TROUBLE CODE PROCEDURES <4G69> - Code No.56: N Range Lamp System | PRINT PAGE / INDEX / PRIOR / NEXT

Code No.56: N Range Lamp System
OPERATION If a fail-safe operation is activated during driving, the engine-A/T-ECU flashes the N range lamp at a frequency of once per second to inform the driver.
DIAGNOSIS CODE SET CONDITIONS If the N range signal is OFF after the N range lamp illuminates (ON), it is judged that there is a short-circuit to earth or open circuit in the N range lamp, and code No.56 is output.
PROBABLE CAUSES Malfunction of the combination meter Damaged harness wires and connectors Malfunction of the engine-A/T-ECU
DIAGNOSIS PROCEDURE
STEP 1. MUT-II/III data list Item 61: Inhibitor switch (Refer to data list reference table ). Q: Is the check result normal? YES: Go to Step 2. NO: Refer to inspection procedure 16: Inhibitor switch system .
STEP 2. Check the N range lamp. Turn the ignition switch to the ON position. Shift the selector lever to the N position. Q: Does the N range lamp illuminate? YES: Go to Step 10. NO: Go to Step 3.
STEP 3. Check the N range lamp valve. Remove the combination meter (Refer to GROUP 54A - Combination Meter Assembly and Vehicle Speed Sensor Removal and Installation ). Check the N range lamp valve. Q: Is the check result normal? YES: Go to Step 4. NO: Replace the valve.
STEP 4. Connector check: C-05 combination meter connector Check for the contact with terminals. Q: Is the check result normal? YES: Go to Step 5. NO: Repair the defective connector.
STEP 5. Measure the resistance at combination meter connector C-05. Disconnect the connector, and measure the resistance between terminal 12 and earth at the wiring harness side. OK: 2 Ω or less Q: Is the check result normal? YES: Go to Step 7. NO: Go to Step 6.
STEP 6. Check the harness between combination meter connector C-05 terminal No.12 and body earth. Check the earth line for open circuit or short-circuit. Q: Is the check result normal? YES: Go to Step 10. NO: Repair the wiring harness.
STEP 7. Measure the voltage at combination meter connector C-05. Disconnect the connector, and measure the voltage between terminal 2 and earth at the wiring harness side. Turn the ignition switch to the ON position. Shift the selector lever to the N position. OK: System voltage Q: Is the check result normal? YES: Check the combination meter, and replace if necessary. NO: Go to Step 8.
STEP 8. Connector check: C-105 intermediate connector Check for the contact with terminals. Q: Is the check result normal? YES: Go to Step 9. NO: Repair the defective connector.
STEP 9. Check the harness between combination meter connector C-05 terminal No.2 and inhibitor switch connector B-22 terminal No.4. Check the output line for short-circuited or open circuit. Q: Is the check result normal? YES: Go to Step 10. NO: Repair the wiring harness.
STEP 10. Connector check: C-136 engine A/T-ECU connector Check for the contact with terminals. Q: Is the check result normal? YES: Replace the engine-A/T-ECU. NO: Repair the defective connector.

[23A] AUTOMATIC TRANSMISSION (FF) - - TROUBLESHOOTING <A/T> - DIAGNOSTIC TROUBLE CODE PROCEDURES <4G69> - Code No.56: N Range Lamp System | PRINT PAGE / INDEX / PRIOR / NEXT

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