Is the harness between EFI ECU - combination meter normal?; Is the combination meter normal?; Check whether there is no poor contact at the connector section.

U0156 (blink 87) on Toyota Passo (KGC10): Combination Meter Communication Failure

Short answer: U0156 means “Combination Meter Communication Failure”. The car’s computer has found a fault in the Engine control (EFI) system and turns on the Check engine light (MIL). First check: is the harness between EFI ECU - combination meter normal?.

Code: U0156 · blink 87
System: Engine control (EFI)
Dashboard light: Check engine light (MIL)
Also sold as: Daihatsu Boon, Daihatsu Sirion (M300)
Applies to: 1KR-FE: M300 (Sirion export = JDM Boon M300S/M301S(4WD? see gaps) & Passo KGC10/KGC15). JDM-spec ECU not separately documented | K3-VE: M301 (Sirion 1.3 = JDM Boon M310S? / Passo QNC10)
Confidence: high (factory manual, export spec)
Source: carmanualsclub.com

Symptoms and when it is set

When communication signal cannot be received from combination meter

What to check, in order

Is the harness between EFI ECU - combination meter normal?
Is the combination meter normal?
Check whether there is no poor contact at the connector section.

Related on this car

← U0121/86 U0101/82 →

Clearing the code does not fix the fault. If it comes back, the problem is still there. For brakes, airbags and steering, see a trained mechanic.