DIAGNOSTIC PROCEDURE
Connect Toyota Hand-Held Tester or scan tool to Data Link Connector 3 (DLC3) located under left side of instrument panel. Turn ignition switch to ON position. Using scan tool, check DTCs and freeze frame data. If no DTC is retrieved, see SYMPTOM DIAGNOSIS table under TROUBLE SHOOTING. If any other DTCs are retrieved, see POWER TILT COLUMN DTC IDENTIFICATION table. Each DTC will be displayed in order, starting with lowest DTC. Erase DTCs using scan tool or disconnecting battery.
| DTC | Definition |
|---|---|
| B2603 | Tilt/Telescopic Manual Switch Circuit Malfunction |
| B2610 | Tilt Position Sensor Or Tilt Motor Circuit Malfunction |
| B2611 | Telescopic Position Sensor Or Telescopic Motor Circuit Malfunction |
| B2620 | ECU Power Source Circuit Malfunction |
POWER TILT COLUMN DTC IDENTIFICATION
Circuit Description
DTC B2603 sets when tilt and telescopic ECU detects voltage outside specifications from tilt and telescopic manual switch.
Diagnosis & Repair
Inspect tilt and telescopic manual switch circuit. See TILT & TELESCOPIC MANUAL SWITCH CIRCUIT under CIRCUIT TESTS. Repair or replace wiring harness or components as necessary. If circuit is okay, check tilt and telescopic ECU. See TILT & TELESCOPIC ECU PIN VOLTAGE TESTS under COMPONENT TESTS. Replace tilt and telescopic ECU as necessary and retest system operation.
During normal operation, mechanical limits are outside operating range. DTC B2610 sets when tilt operation stops (limit reached) while within normal operating sensor range.
- Inspect sensor power source circuit. See «SENSOR POWER SOURCE CIRCUIT»(ref-9259-S25041207282000101300000) under CIRCUIT TESTS. Repair or replace wiring harness or components as necessary. If circuit is okay, check actuator power source circuit. See «ACTUATOR POWER SOURCE CIRCUIT»(ref-9259-S11180016002000101300000) under CIRCUIT TESTS. Repair or replace wiring harness or components as necessary. If circuit is okay, go to next step.
- Inspect tilt motor circuit. See «TILT MOTOR CIRCUIT»(ref-9259-S01445607792000101300000) under CIRCUIT TESTS. Repair or replace wiring harness or components as necessary. If circuit is okay, check tilt and telescopic ECU. See «TILT & TELESCOPIC ECU PIN VOLTAGE TESTS»(ref-9259-S41182956082000101300000) under COMPONENT TESTS. Replace tilt and telescopic ECU as necessary and retest system operation.
During normal operation, mechanical limits are outside operating range. DTC B2611 sets when telescoping operation stops (limit reached) while within normal operating sensor range.
- Inspect sensor power source circuit. See «SENSOR POWER SOURCE CIRCUIT»(ref-9259-S25041207282000101300000) under CIRCUIT TESTS. Repair or replace wiring harness or components as necessary. If circuit is okay, check actuator power source circuit. See «ACTUATOR POWER SOURCE CIRCUIT»(ref-9259-S11180016002000101300000) under CIRCUIT TESTS. Repair or replace wiring harness or components as necessary. If circuit is okay, go to next step.
- Inspect telescopic motor circuit. See «TELESCOPIC MOTOR CIRCUIT»(ref-9259-S28822292822000101300000) under CIRCUIT TESTS. Repair or replace wiring harness or components as necessary. If circuit is okay, check tilt and telescopic ECU. See «TILT & TELESCOPIC ECU PIN VOLTAGE TESTS»(ref-9259-S41182956082000101300000) under COMPONENT TESTS. Replace tilt and telescopic ECU as necessary and retest system operation.
DTC B2620 sets when tilt and telescopic ECU detects voltage input of 8 volts or less for 10 seconds or more.
Ensure battery is fully charged (11 volts or more). Replace battery as necessary. If battery is okay, check tilt and telescopic ECU power source circuit. See ECU POWER SOURCE CIRCUIT under CIRCUIT TESTS. Repair or replace wiring harness or components as necessary. If circuit is okay, check tilt and telescopic ECU. See TILT & TELESCOPIC ECU PIN VOLTAGE TESTS under COMPONENT TESTS. Replace tilt and telescopic ECU as necessary and retest system operation.
TROUBLE SHOOTING
Note. Inspect circuits and components in listed order. If circuits or components are okay, return to trouble shooting and identify next circuit to be checked.
Note. Perform power tilt steering column system self-diagnostics before performing trouble shooting. See DIAGNOSTIC PROCEDURE under SELF-DIAGNOSTIC SYSTEM.
| Problem | Inspect | |
|---|---|---|
| Manual, Auto Away/Return & Memory Functions Inoperative, Stop Part Way Or Do Not Stop | ||
| Tilt & Telescopic | (1) ECU Power Source Circuit; (2) Key Unlock Warning Switch; (3) Body Control ECU; (1) Actuator Power Source Circuit; (1) Sensor Power Source Circuit; (1) Tilt Motor Circuit; (1) Telescopic Motor Circuit; (4) Tilt & Telescopic ECU | |
| Tilt Only | (1) Sensor Power Source Circuit; (1) Tilt Motor Circuit; (4) Tilt & Telescopic ECU | |
| Telescopic Only | (1) Sensor Power Source Circuit; (1) Telescopic Motor Circuit; (4) Tilt & Telescopic ECU | |
| Only Tilt & Telescopic Manual Switch Function Inoperative | ||
| Tilt & Telescopic | (1) Tilt & Telescopic Manual Switch Circuit; (4) Tilt & Telescopic ECU | |
| Tilt Only | (1) Tilt & Telescopic Manual Switch Circuit; (4) Tilt & Telescopic ECU | |
| Telescopic Only | (1) Tilt & Telescopic Manual Switch Circuit; (4) Tilt & Telescopic ECU | |
| Only Auto Away/Return Function Inoperative | ||
| Away & Return | Check Status Of Auto Away Function Using TOYOTA Scan Tool; (2) Ignition Switch; (2) Key Unlock Warning Switch; (4) Tilt & Telescopic ECU | |
| Away Only | (2) Key Unlock Warning Switch; (2) Ignition Switch; (4) Tilt & Telescopic ECU | |
| Return Only | (2) Key Unlock Warning Switch; (2) Ignition Switch; (4) Tilt & Telescopic ECU | |
| (1) Perform appropriate circuit test under CIRCUIT TESTS . If more than one circuit test is listed, perform tests in order listed. (2) See appropriate STEERING COLUMN SWITCHES article. (3) See BODY CONTROL SYSTEMS - LAND CRUISER article. (4) Perform TILT & TELESCOPIC ECU PIN VOLTAGE TESTS under COMPONENT TESTS. Repair or replace components as necessary. | ||
| (1) | Perform appropriate circuit test under CIRCUIT TESTS . If more than one circuit test is listed, perform tests in order listed. |
| (2) | See appropriate STEERING COLUMN SWITCHES article. |
| (3) | See BODY CONTROL SYSTEMS - LAND CRUISER article. |
| (4) | Perform TILT & TELESCOPIC ECU PIN VOLTAGE TESTS under COMPONENT TESTS. Repair or replace components as necessary. |
SYMPTOM DIAGNOSIS