DTC 45

DTC 45 BRAKE SW/STOP L SW


DTC 45 BRAKE SW/STOP L SW

Regarding Wiring Diagram information, Electrical Diagrams.
1.CHECK CONNECTORS FOR ICC UNIT
1. Turn ignition switch OFF.
2. Disconnect ICC unit connectors and connect them securely again. Erase DTC, then perform self-diagnosis of ICC system again.
Does the DTC reset?
YES - � Poor connector connection.
- Check connectors. Check connectors housing for disconnected, loose, bent, and collapsed terminals. If any malfunction is detected, repair as necessary. Erase DTC and perform ICC system running test. Action Test.
NO - GO TO 2
2.CHECK STOP LAMP SWITCH AND ICC BRAKE SWITCH
With data monitor, check if "STOP LAMP SW" and "BRAKE SW" are operating normally.
Do the monitor items display properly?
YES - Replace ICC unit. ICC C/U. Erase DTC and perform ICC system running test. Action Test .
NO - � BRAKE SW: GO TO 3
- STOP LAMP SW: GO TO 5
3.ICC BRAKE SWITCH INSTALLATION AND ADJUSTMENT INSPECTION
Check ICC brake switch for proper installation and adjust if necessary.
Does ICC brake switch operate normally?
YES - GO TO 4
NO - After adjustment, erase DTC and perform ICC system running test. Action Test .
4.CHECK ICC BRAKE SWITCH
Check ICC brake switch.
Does the ICC brake switch check OK?
YES - Replace ICC unit. ICC C/U. Erase DTC and perform ICC system running test. Action Test.
NO - Replace ICC brake switch. Erase DTC and perform ICC system running test. Action Test.
5.CHECK STOP LAMP ILLUMINATION
Check stop lamp illumination.
Do the stop lamps operate normally?
YES - GO TO 6
NO - � Check stop lamp circuit.
- Erase DTC and perform ICC system running test. Action Test.
6.CHECK ICC BRAKE HOLD RELAY





1. Turn ignition switch OFF.
2. Remove ICC brake hold relay.
3. Check continuity between ICC brake hold relay terminals.

7 - 6 Continuity should not exist.
4 - 3 Continuity should exist.

Are continuity results as specified?
YES - GO TO 7
NO - Replace ICC brake hold relay. Erase DTC and perform
ICC system running test. Action Test, "ACTION
TEST : ICC System Running Test".
7.CHECK ICC BRAKE HOLD RELAY CIRCUIT
1. Disconnect ICC unit and stop lamp switch connectors.





2. Check continuity between ICC unit harness connector (A) B17 terminal 38 and ICC brake hold relay harness connector (B)
E134 terminal 6.

Continuity should exist.

3. Check continuity between ICC unit harness connector (A) B17 terminal 38 and stop lamp switch harness connector (C) E38 terminal 4.

Continuity should exist.

Are continuity test results as specified?
YES - Replace ICC unit. ICC C/U. Erase DTC and perform ICC system running test. Action Test .
NO - � Repair harness between ICC unit and ICC brake hold relay or stop lamp switch.
- Erase DTC and perform ICC system running test. Action Test.