DTC 1-1-5 (1-1-3)

1-1-5 (1-1-3) INJECTOR GROUP 2

Trouble Code Conditions
If the injector group circuit is shorted to ground/live, or if there is a break in the circuit, the Engine Control Module (ECM) notes this as a fault and sets Diagnostic Trouble Code (DTC) 1-1-5 (1-1-3).

Substitute value(s)
- ECM shuts off faulty injector group.
- Fuel trim inhibited.

Fault source(s)
Signal too high:
- Signal lead short circuit to live.
- Injection valve defect.

Signal too low:
- Power lead broken.
- Signal lead short circuit to ground.
- Contact resistance in terminals.
- Injection valve defect.

Current too low:
- Signal lead broken.
- Contact resistance in terminals.
- Injection valve defect.

Fault symptom(s)
- Engine is running on 3 cylinders.
- Engine does not start.

TEST PROCEDURE

STATUS REPORT
^ Signal too high:
- Proceed to SIGNAL TOO HIGH section below.

^ Signal too low:
- Proceed to SIGNAL TOO LOW section below.

^ Current too low:
- Proceed to CURRENT TOO LOW section below.

SIGNAL TOO HIGH
- Start engine.
- Test engine start.

If engine runs on 3 cylinders:
^ Check injection valves. Proceed to CHECK INJECTION VALVES section below.

If engine runs on 6 cylinders:
^ Intermittent fault, signal too high. Proceed to INTERMITTENT FAULT, SIGNAL TOO HIGH section below.

CHECK INJECTION VALVES
- Ignition off.
- Disconnect injection valves 3, 5 and 6.
- Connect an ohmmeter between injection valve connector 1 and 2 for each injection valve in turn.

The ohmmeter should read approx. 16 ohms for each injection valve.

If injection valves OK:
^ Check lead between injection valves and ECM # 16 for short circuit to live.

If value differs:
^ Test with new injection valve.

SIGNAL TOO LOW
- Start engine.
- Test engine start.

If engine does not start:
^ Check power lead. Proceed to CHECK POWER LEAD section below.

If engine runs on 6 cylinders:
^ Intermittent fault, signal too low. Proceed to INTERMITTENT FAULT, SIGNAL TOO LOW section below.

CHECK POWER LEAD
- Ignition off.
- Disconnect injection valves 3, 5 and 6.
- Ignition on.
- Connect a voltmeter between injection valve connector terminal 1 and ground for each injection valve in turn.

The voltmeter should read battery voltage.

If values OK:
^ Check signal lead resistance to ground. Proceed to CHECK SIGNAL LEAD RESISTANCE TO GROUND section below.

If values differ:
^ Check fuse 5 (11B/5) in central relay unit:

If fuse OK:
^ Check lead between injection valves and main relay 2/32 terminal 3 for break.

If fuse broken:
^ Check lead between injection valves and fuse 5 for short circuit to ground.

CHECK SIGNAL LEAD RESISTANCE TO GROUND
- Ignition off.
- Injection valves 3, 5 and 6 disconnected.
- Connect an ohmmeter between injection valve terminal 2 and ground for each injection valve in turn.

The ohmmeter should read approx. 0.8 k ohms.

If values OK:
^ Check injection valves. Proceed to CHECK INJECTION VALVES section below.

If values differ:
^ Check lead between injection valves and ECM # 16 for short circuit to ground.

CHECK INJECTION VALVES
- Ignition off.
- Injection valves 3, 5 and 6 disconnected.
- Connect an ohmmeter between injection valve connector 1 and 2 for each injection valve in turn.

The ohmmeter should read approx. 16 ohms for each injection valve.

If injection valves OK:
^ Source of DTC is bad contact in injection valve connector. Check injection valve connector for loose connection, contact resistance and oxidation.

If value differs:
^ Test with new injection valve.

CURRENT TOO LOW
- Start engine.
- Test engine start.

If engine is running on 3 cylinders:
^ Check injection valves. Proceed to CHECK INJECTION VALVES section below.

If engine is running on 6 cylinders:
^ Intermittent fault, current too low. Proceed to INTERMITTENT FAULT, CURRENT TOO LOW section below.

CHECK INJECTION VALVES
- Ignition off.
- Disconnect injection valves 3, 5 and 6.
- Connect an ohmmeter between injection valve connector terminal 1 and 2 for each injection valve in turn.

The ohmmeter should read approx. 16 ohms for each injection valve.

If values OK:
^ Check leads. Proceed to CHECK LEADS section below.

If values differ:
^ Test with new injection valve.

CHECK LEADS
- Ignition off.
- Connect an ohmmeter between terminal 2 on connector to injection valve 3 and terminal 2 on connector to injection valve 5.
- Repeat between injection valves 3 and 6.

The ohmmeter should read approx. 0 ohms for both.

If values OK:
^ Check connector. Proceed to CHECK CONNECTOR section below.

If values differ:
^ Check engine wiring between injection valves for break.

CHECK CONNECTOR
- Ignition off.
- Injection valves 3, 5 and 6 disconnected.
- Check ECM connector and 55-pin connector in central relay unit (A3/F) terminal 14 for contact resistance and oxidation.
- Connect breakout box and check control points.

- Connect an ohmmeter between # 19 and # 16 on breakout box.

The ohmmeter should read approx. 1 k ohm.

If value is OK:
^ Check injection valves. Proceed to CHECK INJECTION VALVES section below.

If ohmmeter reads infinite resistance:
^ Check lead between ECM # 16 and injection valves for break.

INTERMITTENT FAULT, SIGNAL TOO HIGH
Check leads and terminals
- Check lead between injection valves terminal 2 and ECM # 16 for intermittent short circuit to live.

INTERMITTENT FAULT, SIGNAL TOO LOW
Check leads and terminals
- Check injection valve and ECM connector for loose connection, as well as contact resistance and oxidation.
- Check lead between injection valves terminal 2 and ECM # 16 for intermittent short circuit to ground.
- Check lead between injection valves terminal 1 and main relay for intermittent break.

INTERMITTENT FAULT, CURRENT TOO LOW
Check leads and terminals
- Check lead between injection valves terminal 2 and ECM # 16 for intermittent break.
- Check 55-pin connector in central relay unit (A3/F) terminal 14, injection valves and ECM connector for loose connection, as well as contact resistance and oxidation.